Latest Price of Tungsten Filaments on May 27, 2022

The latest price of φ0.8mm tungsten filaments is USD 2.00/PC on May 27, 2022, 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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Latest Price of TIG Welding Cerium Tungsten Electrode on May 27, 2022

The latest price of φ3.2x175mm TIG welding cerium tungsten electrode is USD 2.00/PC on May 27, 2022, 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:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

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Tungsten Filament Wire Makes Incandescent Light Bulbs Safer and Brighter

Incandescent light bulbs have been making homes safer and brighter for over 100 years. After centuries of using fire, candles, oil lamps and gas, the invention of the incandescent light bulb transformed everyday life.

Tungsten is the material of choice for this innovation, emitting bright and long-lasting light.

In 1904, a Hungarian company produced the first tungsten wire, and then in 1906, General Electric managed to make a ductile tungsten wire. The wire made of tungsten is very fragile, which limits its use, but General Electric's William Coolidge was able to make it ductile by swaging and sintering. The malleable tungsten filament allows the wire to be coiled, extending the life of the bulb and making it glow brighter.

The first incandescent light bulbs were made of platinum wire. After experimenting with various materials, Thomas Edison developed the first commercial filament light bulb, which used carbon filament.

Over time, tungsten became the material of choice for filaments because they produced double the amount of light and lasted longer. With further exploration, the Edison-era tungsten light bulb was further developed, which was filled with an inert gas instead of being encased in a vacuum. This greatly reduces the black residue that forms inside the glass sphere due to its vacuum structure.

Old-fashioned Edison-era tungsten bulbs may not burn as brightly as the latest versions, but they are loved for their romantic warm glow, classic bulb shape, and most importantly, for their soft glowing aesthetic. Filament is appreciated.

Vintage light bulbs are used to create a relaxing atmosphere. They can still be used with carbon and tungsten filament wire, but older tungsten bulbs are more cost-effective to buy and more cost-effective in using electricity. They also stay clear longer than carbon filament bulbs.

Chinatungsten Online is a professional manufacturer of tungsten and molybdenum for more than two decades, and are good at producing tungsten filaments and wires. Please feel free to contact us if you have got the purchasing plans. 

If you have any inquiry of tungsten filament wire, 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.