EB Tungsten Filament Price in Early November 2023

 The latest price of φ0.8mm EB tungsten filament is USD 2.00/PC, EXW XIAMEN, CHINA in early November 2023. 

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.

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Cerium Tungsten Electrode Price in Early November 2023

The latest price of φ3.2x175mm cerium tungsten electrode is USD1.80/PC, EXW XIAMEN, CHINA in early November 2023. 

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 November 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 the Differences of Barium Tungsten Electrodes and Tungsten Electrodes?

Barium tungsten electrodes have unique properties that differentiate them from other types of tungsten electrodes. Here are the key differences as following: 

Electron Emission Properties:

BaW Electrodes: they are known for their excellent electron emission properties. The addition of barium to the tungsten material enhances its electron emission capability, making it efficient in applications requiring controlled electron emission, such as cathode ray tubes (CRTs).

Other W Electrodes: Other electrodes, such as pure tungsten or thoriated tungsten, do not have the same high electron emission characteristics as barium-strontium tungsten cathodes. They are typically used in applications where electron emission efficiency is not critical.

Applications:

BaW Electrodes: They are primarily used in electron beam devices like CRTs for televisions and computer monitors. They are designed for applications that demand stable and efficient electron emission.

Other W Electrodes: Other types of electrodes find use in various applications, including welding, electrical contacts, lighting, and more. The choice of tungsten electrode material depends on the specific requirements of the application.

High-Temperature Tolerance:

BaW Electrodes: Barium-strontium tungsten cathodes can withstand high temperatures during electron emission. They maintain stable emission even at elevated temperatures, which is crucial for CRT operation.

Other W Electrodes: The high-temperature tolerance of other tungsten electrodes may vary depending on the specific tungsten alloy and application. Some tungsten alloys may not have the same level of high-temperature tolerance as barium tungsten cathodes.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten electrodes/cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten electrodes, please feel free to contact us:
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Barium Tungsten Cathodes Applied in Photography Lamps for High-quality Lighting

Barium tungsten cathodes, also known as barium-tungsten electrodes, are a type of electrode used in various electronic devices and equipment. They are indeed used in photography lamps, especially in some types of studio lighting equipment and flash units. 

Here are some key reasons why they are employed in these applications:

High Efficiency: These kinds of cathodes have a high electron emission efficiency, which means they can emit electrons efficiently when heated. This property is crucial for generating the intense light needed for photography.

Stability: These cathodes provide stable and consistent electron emission over time. This stability is essential in photography to ensure that the lighting remains constant throughout a photo shoot.

Color Temperature: BaW cathodes produce light with a color temperature that closely matches natural daylight, making them suitable for various photographic applications where accurate color representation is important.

Longevity: BaW cathodes have a relatively long lifespan, reducing the frequency of replacement or maintenance in photography equipment.

Energy Efficiency: These cathodes emit electrons at lower temperatures due to their low work function, which contributes to the energy efficiency of the lamps.

Brightness Control: Photography lamps often require precise control over brightness. BaW cathodes can be modulated to achieve the desired brightness levels.

Instant Flash: In photography, flash units need to emit light instantly when triggered. BaW cathodes can respond quickly to the triggering signal, providing the rapid burst of light required for flash photography.

Color Rendering: The color rendering properties of these cathodes are well-suited for capturing accurate and natural-looking images.

Durability: Photography lamps may be subjected to frequent use and handling. Barium tungsten cathodes are durable and can withstand the rigors of professional photography equipment.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten electrodes/cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten electrodes/cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten cathodes, 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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Why Can Barium Tungsten Cathodes Be Used in Signal Lights?

Barium tungsten cathodes are used in signal lights, specifically in electron tubes and cathode-ray tubes (CRTs), for several reasons:

High Electron Emission Efficiency: These cathodes have a high electron emission efficiency, which means they can efficiently emit electrons when heated. This property is essential for electron tubes, where the cathode's ability to emit electrons determines the device's performance.

Stability: BaW cathodes provide stable and consistent electron emission over time. This stability is crucial for these lights, where a reliable and constant light source is needed.

Longevity: These cathodes have a relatively long lifespan, ensuring that this kind of lights can operate for an extended period without frequent replacement or maintenance.

Low Work Function: BaW cathodes have a low work function, which is the amount of energy required to release electrons. A low work function means that they can emit electrons at lower temperatures, making them energy-efficient.

Temperature Tolerance: These lights may operate in various environmental conditions, including extreme temperatures. BaW cathodes can withstand a wide temperature range, ensuring they remain operational in harsh conditions.

Brightness: The high electron emission efficiency of BaW cathodes allows for the production of bright and visible signals, making them suitable for use in these lights where visibility is critical.

The combination of efficient electron emission, stability, longevity, and temperature tolerance makes barium tungsten cathodes well-suited for use in signal lights and other electron tube-based devices.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for nearly thirty years. We can supply barium tungsten electrodes/cathodes in regular or customized drawings. Please free feel to contact us when you got the purchasing plans.

If you have any inquiry of barium tungsten cathodes, please feel free to contact us:
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Tungsten Plate Price in the Second half of September 2023

3.5x96x560mm tungsten plate price is 520.00 USD/PC in the second half of September 2023, 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.

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Lanthanated Tungsten Electrode Price in the Second half of September 2023

Ø3.2x175mm lanthanated tungsten electrode price is 2.00 USD/PC in the Second half of September 2023, 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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