The Differences Between Cerium Tungsten Electrode and Thorium Tungsten Electrode

With the continuous development of science and technology such as welding, cutting and spraying technology, manufacturers have higher and higher requirements for tungsten electrodes, such as easy arc starting, stable arc column and long service life.

In order to improve the deficiencies of pure tungsten electrodes, researchers often add an appropriate amount of modifiers such as cerium oxide (CeO2) or thorium oxide in the production process, and the prepared products are naturally called corresponding electrodes such as cerium tungsten electrode (WC20) and thorium tungsten electrode (WT20). The two electrodes have many differences in terms of performance and production process.

1. Concept

WC20 is a tungsten electrode containing about 2% cerium oxide with gray color code; WT20 is a tungsten electrode containing 1-1.2% thorium oxide with red color code. 

2. Physical and Chemical properties

WC20 has the characteristics of low melting rate, ablation resistance, good weldability, easy arc starting, high arc column stability, and no radioactivity. Under certain conditions, with the increase of CeO2 content, the ablation resistance and arc starting performance of the electrode will also increase.

The advantages of WT20 include low electron work function, strong current carrying capacity, good electrical conductivity, mechanical cutting and welding, etc., but the main disadvantage is radioactivity.

3. Production

The production process of the two electrodes is similar. The basic steps are to prepare tungsten-cerium powder or tungsten-thorium powder, then press it into a billet, and finally perform pre-sintering, high-temperature sintering, hot swaging, straightening, cutting, and cleaning in sequence.

4. Use

WC20 electrodes can be used in DC welding, AC welding, plasma welding/cutting/spraying/smelting; WT20 electrodes are generally used in direct current welding, as direct current negative electrodes or positive electrode materials such as stainless steel and nickel alloys, and are also key electrodes for argon arc welding, plasma welding and other processes.

If you have any inquiry of tungsten electrodes, please feel free to contact us:

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EB Tungsten Filament Price on Dec. 8, 2022

The latest price of φ0.8mm EB tungsten filament is USD 2.00/PC, EXW XIAMEN, CHINA on Dec. 8, 2022. 

Tungsten filaments, also called cathodes or electron emitters or electron sources, are mainly made of high-quality tungsten. Of all pure metals, tungsten has the highest melting point (3422°C), the lowest vapor pressure at temperatures above 1650°C, and the highest tensile strength. Tungsten also has the lowest coefficient of thermal expansion of all pure metals. This combination of properties makes tungsten an ideal material.

Tungsten can be used in both thermionic electron guns and field-emission (CFE) electron guns. Electron beams come from filaments made of various materials. The most common is the tungsten hairpin gun, which is widely used in scanning electron microscopes, transmission electron microscopes, and microprobe systems. This filament is a tungsten ring that acts as a cathode. Apply voltage to the loop to heat it up. The anode, which is positive relative to the filament, forms a strong attraction to electrons. This causes electrons to be accelerated towards the anode. Some accelerate near the anode and down the column to the sample.

An electron gun works at a high temperature, which is required for thermionic emission. For this, a filament or the cathode should be of a material that has a high melting point in order for it to continuously emit electrons. Tungsten filament is folded with various shapes to help in focusing the electron beam.

If you have any inquiry of tungsten filament, please feel free to contact us:

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Cerium Tungsten Electrode Price on Dec. 8, 2022

The latest price of φ3.2x175mm cerium tungsten electrode is USD 2.30/PC, EXW XIAMEN, CHINA on Dec. 8, 2022. 

Cerium tungsten electrode (WC20) is alloyed with about 2% cerium oxide. It is a non-radioactive, refractory or non-consumable metal electrode material, which is the preferred substitute for thorium tungsten electrodes. Regular diameter of the electrode is between 0.5mm and 12.0mm, and the length is 150mm and 175mm.

The addition of this small percentage of cerium oxide increases the electron emission qualities of the electrode which gives them a better starting characteristic and a higher current carrying capacity with no spitting. With the increase of cerium oxide content, the ablation resistance and arc starting of cerium tungsten electrode will increase; with the increase of use time, the welding performance will gradually decrease.

The electrode has excellent arc starting properties at low current, and can operate successfully with AC or DC electrode negative. If used on higher current applications, the cerium oxide may be concentrated to the excessively hot tip of the electrode. In addition, WC20 is also used in inert gas shielded arc welding, hydrogen atom welding, argon arc surfacing, pulse argon arc welding, plasma welding, plasma cutting, plasma spraying, plasma melting, etc. The welding materials can be carbon steel, stainless steel, silicon copper, copper, bronze, titanium and so on.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:

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Tungsten Sheet Price in early November 2022

Φ100x0.3mm tungsten sheet price is 4.60 USD/PC in the first half of November 2022, EXW XIAMEN, CHINA. 

Tungsten sheets can be as thin as 0.01mm or as thick as 127mm, with widths typically ranging from 10mm to 800mm. They can be used in many different applications and is valued for its corrosion resistance, ability to withstand extremely high temperatures, and ability to create rigidity and hardness when combined with other metals in the alloy.

Tungsten is used in the aerospace, research, building materials and light bulb industries. It is the predominant metal in electric furnace heating elements, as well as in any assembly where high pressure/high temperature environments are expected. Sheets made of tungsten are commonly used in furnace construction, but are also important for making parts for the electronics and semiconductor industries, and can be found in a variety of lighting, vacuum plating, electronic vacuums and shielding.

If you have any inquiry of tungsten sheet, please feel free to contact us:
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Lanthanated Tungsten Electrode Price in Early November 2022

Ø3.2x175mm lanthanated tungsten electrode price is 1.90 USD/PC in the first half of November 2022, EXW XIAMEN, CHINA. 

Wl20 electrodes contain at least 1.7% to 2.2% lanthanum for excellent arc starting, low burnout rate, good arc stability and excellent re-ignition characteristics. They are ideal if you want to optimize your welding capabilities. They can work well on either AC or DC electrode negatives with tips, or they can be used with AC sine wave power supplies. The tungsten electrode adding with rare earth element lanthanum holds sharp tips well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources.

If you have any inquiry of lanthanated tungsten electrode, please feel free to contact us:
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Tungsten Needles and Tungsten Rhenium Needles Used in the Construction of Probe Cards

Tungsten needle, also named tungsten pin, mainly refer to thin tungsten rod or thin tungsten rod with sharp tip. Their properties are basically the same, but uses are different. Mostly, their diameters are usually below 2mm and lengths range from 15mm to 100mm. 

For thin tungsten rod, it is mainly used as an electrode for argon arc welding. During welding, an arc will be generated between the tungsten electrode and the workpiece, and under the action of the arc heat, the filler metal will melt with the workpiece to form a weld.

Tungsten rod with pointed tip can be simply understood as pure tungsten or tungsten alloys with pointed tips at one end or both ends, which are mainly used as instrument probes, such as digital four-probe testers. The distance between the four tungsten needles in the digital four-probe tester cannot be too long or too short, and each one has a different function.

The rods with pointed tip are usually called tungsten probes. Most integrated circuits are tested using cantilever blade and epoxy ring probe cards. Contact resistance, balanced contact force and card life are directly dependent on probe material and shape. Therefore, a critical design step for any card is the specification of the probes.

In blade cards, probes are soldered to metal or ceramic blades, which in turn are mounted to a printed wiring board (PWB) to match the contact land pattern of the device under test. For epoxy ring cards, the probes are arranged in a contact pad pattern, embedded in the epoxy ring, and the bake-hardened assembly is bonded and soldered to the PWB.

The use of tungsten rhenium (WRe) needles in probe card construction has grown considerably over the past two years. Traditionally, tungsten (W) probes have been used for many reasons - excellent stiffness, hardness and wear properties.

The growing acceptance of WRe as an alternative probe material seems to be mainly due to the good user experience. Chinatungsten/CTIA GROUP found both tungsten and WRe materials were effective in scrubbing the contact pads. But due to its higher hardness, the WRe probe exhibits excellent resistance to tip fouling and better overall lifetime characteristics.

Chinatungsten/CTIA GROUP are professional manufacturers of tungsten for more than two decades, please feel free to contact us if you have any purchasing plans for tungsten and tungsten rhenium needles. 

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A New Production Method to Make Tungsten Target

Tungsten target, also known as tungsten sputtering target, is a typical pure tungsten product with high purity, high melting point, high density, high deflection strength, good thermochemical stability, low resistance, non-toxic and non-radioactive characteristics. It is widely used in flat panel displays, solar cells, integrated circuits, automotive glass, medical equipment and other industries. 

The researcher with the patent number CN102513789A provides a method for producing it and steps are as follows:

Provide target blanks; machine the surface of the blanks; put the machined blanks into a vacuum jacket and vacuumize, and the vacuuming step is done through a degassing tube; forge the blanks in the vacuum jacket; the blanks in the vacuum envelope are calendered; after the calendering, cooling is performed and the vacuum envelope is removed.

Notes on this method:

1) After the described vacuuming, also need to carry out the step of heat treatment for the first time to the vacuum envelope: after being carried out to a temperature of 200 ℃～500 ℃, carry out the insulation step. During the heating and heat preservation process, the vacuum was continuously pumped so that the vacuum degree in the vacuum envelope was at least 10^-3Pa, and then the forging step was performed on the tungsten target material blank in the vacuum envelope.

2) A second heat treatment of the blank is required before the forging step is performed on the blank in the vacuum jacket. The temperature of the second heat treatment is 900 ° C ~ 1500 ° C, and is kept at this temperature for 1h ~ 5h.

3) After the forging step is performed on the tungsten blank in the vacuum envelope and before the calendering step is performed on the blank in the vacuum envelope after forging, a third heat treatment is also performed on the blank in the vacuum envelope. The temperature of the 3rd heat treatment is 900 DEG C～1500 DEG C, and is kept at this temperature for 0.8h～1h.

Compared with the prior art, the production method has the following advantages: no mold is required, the problems of cracks and easy surface oxidation when the billet is processed and extended in the air can be avoided, and the internal structure is uniform and the grain size is consistent. The tungsten targets required by sputtering targets have the advantages of easy processing and low rejection rate.

If you have any inquiry of tungsten target, please feel free to contact us:
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Tungsten foil for Electric light Source Parts and Electric Vacuum Devices

Tungsten foil is a kind of thin tungsten sheet with thinner thickness of 0.05mm to 0.3mm and more narrow width of 50mm to 400mm. With more than 99.95% purity, it owns excellent thermal, mechanical, chemical and electrical properties, and is widely used in many fields. 

Regarding its physical and chemical properties, it is a silver-gray metal sheet with metallic luster, with a melting point of about 3410 °C, a boiling point of about 5660 °C, a relative density of 19.35g/cm3, and characteristics of low vapor pressure, small evaporation rate, low plastic-brittle transition temperature, low resistivity, good chemical stability, creep resistance, heat resistance and toughness. 

Under normal temperature and pressure, it will not react with air, water, concentrated hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid and aqua regia, but will dissolve in the mixed acid of hydrofluoric acid and concentrated nitric acid. In addition, under heating conditions, it will weakly react with mineral acids (excluding hydrofluoric acid) such as concentrated hydrochloric acid, sulfuric acid, and nitric acid.

From the perspective of production method, tungsten metal foil is first purified by recrystallization method of ammonium paratungstate, and heated in a porcelain crucible. After the ammonia volatilizes, tungsten oxide can be obtained, and then the tungsten oxide is reduced with hydrogen to prepare tungsten powder, and then the tungsten powder is processed, etc. The tungsten slab is prepared by static pressing and sintering at high temperature. Finally, the tungsten slab is rolled by a rolling mill, and then the foil is cut and formed by a shearing machine.

In terms of usage, the foil can be used to manufacture electric light source parts, electric vacuum devices, medical shielding parts, current collectors for aluminum ion batteries, heating elements and heat shields for electric vacuum furnaces/high temperature furnaces. In addition, it can also be stamped into a tungsten boat, which can be applied to vacuum-coated utensils.

Meanwhile, in addition to molybdenum foils, tantalum foils, nickel foils and titanium foils that can be used as current collectors for batteries, tungsten foils can also be used. Studies have shown that tungsten foil has stable electrochemical performance in the voltage window range of 0-2.5v.

If you have any inquiry of tungsten foil, please feel free to contact us:
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Non-sag Tungsten Wire Replaces High Carbon Steel Wire as Base Material of Diamond Wire Saw

Diamond wire saw, also known as diamond wire, refers to a cutting wire that uses electroplating process or resin bonding method to fix diamond abrasive on metal wire. It is mainly used to cut high hard and brittle materials such as single crystal silicon, polycrystalline silicon, sapphire, magnetic materials and cemented carbide, etc.

Compared with free abrasive wire saws, it has the advantages of higher processing efficiency, lower energy consumption, and better cutting quality; compared with circular saws and band saws, it can not only flexibly change the cutting direction, but also process more complex geometric shapes. However, this does not mean that the wire saw does not have any shortcomings. The current wire saw with carbon steel wire as the busbar/base material has the shortcomings of large wire diameter, high wire breakage rate and short service life. Therefore, in order to make up for the deficiencies of the existing wire saws, manufacturers began to use non-sag tungsten wire to replace high carbon steel wire as the base material of diamond wire.

For the production of diamond wire saws based on tungsten wire, researchers with the patent number CN113275659A proposed a new manufacturing method. The process is as follows: (1) Optimal black tungsten wire, which goes through pay-off → three-stage electropolishing → water washing → drying → Take up the wire to prepare silver-white metallic luster tungsten wire; (2) The tungsten wire treated in step (1) is successively paid off → secondary degreasing → pickling → impact nickel → sanding → sand fixing → heat treatment → After taking up the wire, a tungsten-based diamond wire saw with a wire diameter of 30~40um can be prepared.

Thanks to the characteristics of tungsten, the tungsten-based diamond wire saw can be much cost-effectively than before and now most enterprises are trying to use the new kind of wire despite the supply of this wire is very tight. Chinatungsten Online can supply this tungsten wire. If you have got the purchasing plan, please feel free to contact us. 

If you have any inquiry of non-sag tungsten wire, please feel free to contact us:
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EB Tungsten Filament Price on September 23, 2022

The latest price of φ0.8mm EB tungsten filament is USD 2.00/PC, EXW XIAMEN, CHINA on September 23, 2022. 

Tungsten filaments, also called cathodes or electron emitters or electron sources, are mainly made of high-quality tungsten. Of all pure metals, tungsten has the highest melting point (3422°C), the lowest vapor pressure at temperatures above 1650°C, and the highest tensile strength. Tungsten also has the lowest coefficient of thermal expansion of all pure metals. This combination of properties makes tungsten an ideal material.

Tungsten can be used in both thermionic electron guns and field-emission (CFE) electron guns. Electron beams come from filaments made of various materials. The most common is the tungsten hairpin gun, which is widely used in scanning electron microscopes, transmission electron microscopes, and microprobe systems. This filament is a tungsten ring that acts as a cathode. Apply voltage to the loop to heat it up. The anode, which is positive relative to the filament, forms a strong attraction to electrons. This causes electrons to be accelerated towards the anode. Some accelerate near the anode and down the column to the sample.

An electron gun works at a high temperature, which is required for thermionic emission. For this, a filament or the cathode should be of a material that has a high melting point in order for it to continuously emit electrons. Tungsten filament is folded with various shapes to help in focusing the electron beam.

If you have any inquiry of EB tungsten filament, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

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Cerium Tungsten Electrode Price on September 23, 2022

The latest price of φ3.2x175mm cerium tungsten electrode is USD 2.00/PC, EXW XIAMEN, CHINA on September 23, 2022. 

Cerium tungsten electrode (WC20) is alloyed with about 2% cerium oxide. It is a non-radioactive, refractory or non-consumable metal electrode material, which is the preferred substitute for thorium tungsten electrodes. Regular diameter of the electrode is between 0.5mm and 12.0mm, and the length is 150mm and 175mm.

The addition of this small percentage of cerium oxide increases the electron emission qualities of the electrode which gives them a better starting characteristic and a higher current carrying capacity with no spitting. With the increase of cerium oxide content, the ablation resistance and arc starting of cerium tungsten electrode will increase; with the increase of use time, the welding performance will gradually decrease.

The electrode has excellent arc starting properties at low current, and can operate successfully with AC or DC electrode negative. If used on higher current applications, the cerium oxide may be concentrated to the excessively hot tip of the electrode. In addition, WC20 is also used in inert gas shielded arc welding, hydrogen atom welding, argon arc surfacing, pulse argon arc welding, plasma welding, plasma cutting, plasma spraying, plasma melting, etc. The welding materials can be carbon steel, stainless steel, silicon copper, copper, bronze, titanium and so on.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:

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Why Fine Tungsten Wire Can Be Used for Window Heating?

Tungsten is the most widely used refractory metal with up to 3410℃ melting point. It also has good electrical and thermal conductivity under the conditions of low thermal expansion, low vapor pressure and high temperature, so tungsten is widely used to make filaments of various incandescent lamps and tungsten halogen lamps and electrodes of gas discharge lamps.

In addition, tungsten wire can be used as a heating material for high temperature furnaces, heating elements for electronic tubes and reinforcing ribs for composite materials. The main reason for using this metal wire as heating wire is that only the melting point of tungsten exceeds 3400 degrees Celsius, and it has advantages of good winding performance and no sagging. 

Heated glass is used to prevent fogging and freezing in the windows of cars, trucks and ships. To make it heatable, the heating wire is very important. Usually, the heating wire uses tungsten as raw material. This type of wire requires very tight tolerance for the diameter to ensure consistent mechanical properties and a defined "split level". A minimum of 99.95% purity is also required, which is the perfect prerequisite for a reproducible and controllable process.

To prevent reflections in glass, it is necessary to produce fine tungsten wires with a graphite surface for window heating. These wires are available in standard diameters from 12 µm to 58 µm, corresponding to a resistance rating of 630 - 40 Ohm/m.

The unique properties of our ultra-fine tungsten wire allow us to provide you with the highest quality precision wire. The fine means a diameter of 0.015mm. By comparison: the average diameter of a human hair is 0.075mm, which is almost six times as thick as a human hair.

Meanwhile, we also supply wires on standardized coils, sealed with a desiccant package to prevent oxidation during storage as much as possible. We supply fine tungsten wire for all types of window heating.

If you have any inquiry of tungsten wire, please feel free to contact us:
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Types of JEOL’s EB Tungsten Filament

What Is JEOL’s EB Tungsten Filament？

Evaporation source materials used for vapor deposition require excellent electrical conductivity, high melting point and low vapor pressure. Therefore, many vapor deposition accessories are made of tungsten. Filaments/heaters made of tungsten have the characteristics of high melting point, low thermal expansion coefficient, good corrosion resistance and long evaporation life. Japan Electron Optical Laboratory is the full name of JEOL. After decades of exploration and research by the world's top scientific instrument manufacturers, they created this brand. And now their products are widely used in the fields of medicine, biology, biochemistry, agriculture, material science, metallurgy, chemical industry, petroleum, pharmaceutical, semiconductor and electronics. Their filaments are well known in the world and widely used in many files. 

Their filaments have a powerful vacuum system and is widely used in SEM (Scanning Electron Microscope). These filaments use the latest optoelectronic systems to improve image quality in scanning electron microscopes. 

The types of EB Tungsten Filament

They include 0.55mm of mosquito type, 0.65mm of mosquito type, 0.8mm of mosquito type, 0.8mm of eccentric type and 0.55mm of half-moon type. These filaments have strong plasticity in maintaining electron gun and optical coating.

1, Mosquito Coil: the shape of the filament is similar to the mosquito coil, therefore, it can be named as Mosquito Coil. And the Mosquito Coil can be divided into many specifications.

2, Pull-type: Pull-type is also known as the cavity type of Mosquito Coil.

3, U-shaped: this kind of filament is similar to the shape of the letter U.

4, U-shaped with folding legs: the feet of the filament has a curved.

5, Half Moon: the shape of this type is the shape of a half moon.

6, Straight shape

Our company is professional manufacturer of tungsten for more than two decades. EB Filaments especially JOEL types are available. Please feel free to contact us for more information. 

If you have any inquiry of molybdenum filament, please feel free to contact us:
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The Latest Price of Tungsten Filaments

The latest price of φ0.8mm tungsten filaments is USD 2.00/PC, EXW XIAMEN, CHINA.

Tungsten filaments, also called cathodes or electron emitters or electron sources, are mainly made of high-quality tungsten. Of all pure metals, tungsten has the highest melting point (3422°C), the lowest vapor pressure at temperatures above 1650°C, and the highest tensile strength. Tungsten also has the lowest coefficient of thermal expansion of all pure metals. This combination of properties makes tungsten an ideal material.

Tungsten can be used in both thermionic electron guns and field-emission (CFE) electron guns. Electron beams come from filaments made of various materials. The most common is the tungsten hairpin gun, which is widely used in scanning electron microscopes, transmission electron microscopes, and microprobe systems. This filament is a tungsten ring that acts as a cathode. Apply voltage to the loop to heat it up. The anode, which is positive relative to the filament, forms a strong attraction to electrons. This causes electrons to be accelerated towards the anode. Some accelerate near the anode and down the column to the sample.

An electron gun works at a high temperature, which is required for thermionic emission. For this, a filament or the cathode should be of a material that has a high melting point in order for it to continuously emit electrons. Tungsten filament is folded with various shapes to help in focusing the electron beam.

If you have any inquiry of tungsten filaments, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

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The Latest Price of Cerium Tungsten Electrode

The latest price of φ3.2x175mm cerium tungsten electrode is USD 2.00/PC, EXW XIAMEN, CHINA.

Cerium tungsten electrode (WC20) is alloyed with about 2% cerium oxide. It is a non-radioactive, refractory or non-consumable metal electrode material, which is the preferred substitute for thorium tungsten electrodes. Regular diameter of the electrode is between 0.5mm and 12.0mm, and the length is 150mm and 175mm.

The addition of this small percentage of cerium oxide increases the electron emission qualities of the electrode which gives them a better starting characteristic and a higher current carrying capacity with no spitting. With the increase of cerium oxide content, the ablation resistance and arc starting of cerium tungsten electrode will increase; with the increase of use time, the welding performance will gradually decrease.

The electrode has excellent arc starting properties at low current, and can operate successfully with AC or DC electrode negative. If used on higher current applications, the cerium oxide may be concentrated to the excessively hot tip of the electrode. In addition, WC20 is also used in inert gas shielded arc welding, hydrogen atom welding, argon arc surfacing, pulse argon arc welding, plasma welding, plasma cutting, plasma spraying, plasma melting, etc. The welding materials can be carbon steel, stainless steel, silicon copper, copper, bronze, titanium and so on.

If you have any inquiry of cerium tungsten electrode, please feel free to contact us:
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What Are Differences of Tungsten Copper Foils, Sheets and Blocks

What do you know about tungsten copper foils, strips, sheets, plates, or blocks? What are their differences?  

Actually, they are the same product with rectangular shape. To distinguish them, people often call them differently. Foils usually mean plates with thickness less than 0.1mm; strips mean thin and narrow plates; sheets mean plates with 0.1-2.0mm thickness; plates mean 2.0-10.0mm thickness and thickness above 10.0mm will be called blocks. 

Tungsten copper alloy is a refractory metal alloy of tungsten and copper which is made from copper powder and tungsten powder. WCu alloy Parts are made from the WCu alloy by pressing the tungsten particles into a desired shape, sintering the compacted part, then infiltrating with molten copper. Therefore, the alloy combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.

If you are looking for a material that has high density, high thermal conductivity or low thermal expansions, the WCu Alloy would be the best choice. Its versatility, durability and cost-effective performances make it very popular in many industries. 

Nowadays, tungsten copper products are a staple in the refractory metal industry and are meeting the growing demands of high-tech applications such as major electronics, safety equipment, weighted gaskets, EDM electrodes in spark erosion cutting machines, heat sinks, arc contacts and vacuum contacts, and other electrical and electrical/thermal applications. 

Chinatungsten provides these industries with the best quality sheets, strips, plates and blocks products to meet all specifications of functional performance, precise dimensions, finish and packaging to meet the exact requirements of buyers. We work closely with our customers' design engineering and production personnel to meet all end-use and manufacturing needs. Do feel free to contact us if you have any purchasing plans. 

If you have any inquiry of tungsten copper sheets, please feel free to contact us:

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How Does Tungsten Filament or Tungsten Cathode Work?

Tungsten filament, also named tungsten heater, tungsten filament coil or tungsten cathode, is made of tungsten material and formed by single tungsten wire or multiple strands according to the specific requirements of the available samples or drawings. 

As a typical representative of refractory metal tungsten products, its tungsten content is generally more than 99.95%, and the diameter is in the range of 0.2-2.5mm. With characteristics of high melting point, high specific gravity, high strength, high hardness, high resistivity, low vapor pressure, low evaporation rate, small thermal expansion coefficient, high temperature resistance, wear resistance, impact resistance, corrosion resistance and good electrical and thermal conductivity, tungsten filaments are widely used in many fields. 

Generally, they are often used as evaporation source materials for vacuum evaporation machines, and are mainly used in the production of computers, picture tubes, mirrors, plastics, car lights, mobile phone casings, precision optics, craft glass, cosmetic packaging and photovoltaic products.

The advantages of using tungsten heaters in vacuum evaporation machines include high utilization of tungsten resources and good coating effect, that is, the film products have the advantages of high precision, uniformity and stability, mainly due to the high melting point of the heaters, good Corrosion resistance and oxidation resistance.

A cathode is the metallic electrode through which current flows out in a polarized electrical device. In many applications, since the cathode gains electrons to produce current, it gradually gains mass from the cations it attracts. When used as a cathode, uses can easily gain current and the service life is longer than other materials. 

Tungsten stranded wire or tungsten wire is mainly used as the raw material of heater, and can also be directly used for heating element of semiconductor or vacuum device. The metal wire to be evaporated and the tungsten wire can also be twisted together to make the product more convenient and faster.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum. If you request a quote for above products, please feel free to contact us. 

If you have any inquiry of tungsten cathode, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

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Tungsten Sheet Price on July 26, 2022

Φ100x0.3mm tungsten sheet price is 4.60 USD/PC on July 26, 2022, EXW XIAMEN, CHINA. 

Tungsten sheets can be as thin as 0.01mm or as thick as 127mm, with widths typically ranging from 10mm to 800mm. They can be used in many different applications and is valued for its corrosion resistance, ability to withstand extremely high temperatures, and ability to create rigidity and hardness when combined with other metals in the alloy.

Tungsten is used in the aerospace, research, building materials and light bulb industries. It is the predominant metal in electric furnace heating elements, as well as in any assembly where high pressure/high temperature environments are expected. Sheets made of tungsten are commonly used in furnace construction, but are also important for making parts for the electronics and semiconductor industries, and can be found in a variety of lighting, vacuum plating, electronic vacuums and shielding.

If you have any inquiry of tungsten sheet, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

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Lanthanated Tungsten Electrode Price on July 26, 2022

Ø3.2x175mm lanthanated tungsten electrode price is 1.90 USD/PC on July 26, 2022, EXW XIAMEN, CHINA. 

Wl20 electrodes contain at least 1.7% to 2.2% lanthanum for excellent arc starting, low burnout rate, good arc stability and excellent re-ignition characteristics. They are ideal if you want to optimize your welding capabilities. They can work well on either AC or DC electrode negatives with tips, or they can be used with AC sine wave power supplies. The tungsten electrode adding with rare earth element lanthanum holds sharp tips well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources.

If you have any inquiry of lanthanated tungsten electrode, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

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Latest Price of Tungsten Plate on July 7, 2022

The latest price of 560x95x3.5mm tungsten plate is 520.00 USD/PC on July 7, 2022, EXW XIAMEN, CHINA. 

Tungsten plates can be as thin as 0.01mm or as thick as 127mm, with widths typically ranging from 10mm to 800mm. They can be used in many different applications and is valued for its corrosion resistance, ability to withstand extremely high temperatures, and ability to create rigidity and hardness when combined with other metals in the alloy.

Tungsten is used in the aerospace, research, building materials and light bulb industries. It is the predominant metal in electric furnace heating elements, as well as in any assembly where high pressure/high temperature environments are expected. Plates made of tungsten are commonly used in furnace construction, but are also important for making parts for the electronics and semiconductor industries, and can be found in a variety of lighting, vacuum plating, electronic vacuums and shielding.

If you have any inquiry of tungsten plate, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.

Latest Price of Lanthanated Tungsten Electrode (WL20) on July 7, 2022

The latest price of Ø2.4x175mm lanthanated tungsten electrode (WL20) is 1.10 USD/PC on July 7, 2022, EXW XIAMEN, CHINA. 

WL20 electrodes contain at least 1.7% to 2.2% lanthanum for excellent arc starting, low burnout rate, good arc stability and excellent re-ignition characteristics. They are ideal if you want to optimize your welding capabilities. They can work well on either AC or DC electrode negatives with tips, or they can be used with AC sine wave power supplies. The tungsten electrode adding with rare earth element lanthanum holds sharp tips well, which is an advantage for welding steel and stainless steel on DC or AC from square wave power sources.

If you have any inquiry of lanthanated tungsten electrode, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten Wechat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.