Tungsten News

Tungsten News
What Is Barium Tungsten Cathode? 103

Barium tungsten cathode, also called barium tungsten electrode, is a cathode material used in electronic devices, which is a composite material consisting of barium oxide (BaO) and tungsten (W). The cathode is an important part of an electronic device, it is where electrons are generated. In electronic devices, these cathodes are usually used in vacuum electronic devices, such as light bulbs, X-ray tubes, electronic picture tubes and some high-power microwave tubes. The most popular applications are in xenon flash lamps.…

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Export Control: Germanium-Related Items 83

On July 4, 2023, the Ministry of Commerce and the General Administration of Customs jointly issued a notice to implement export control on gallium and germanium related items. Among the germanium-related items whose exports are restricted are: germanium metal, zoned germanium ingots, zinc germanium phosphate, germanium epitaxial growth substrates, germanium dioxide and germanium tetrachloride. Germanium (Ge) is an important strategic resource, is a grayish-white quasi-metal, lustrous, hard, chemically similar to the same family of tin and silicon, insoluble in water,…

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Export Control: Gallium-Related Items 98

According to the “Export Control Law of the People’s Republic of China”, “Foreign Trade Law of the People’s Republic of China” and “Customs Law of the People’s Republic of China” relevant provisions, in order to safeguard national security and interests, approved by the State Council, decided to implement export control on gallium and germanium related items. Unauthorized gallium-related items that cannot be exported are: gallium metal (monomer), gallium nitride, gallium oxide, gallium phosphide, gallium arsenide, indium gallium arsenic, gallium selenide…

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Effective August 1: Restrictions on Exports of Gallium and Germanium-Related Items 84

According to Chinatungsten Online, on July 4, 2023, the Ministry of Commerce and the General Administration of Customs issued an announcement on the export control of gallium and germanium related items. According to the announcement, there are 8 gallium related items, namely gallium metal (monomer), gallium nitride, gallium oxide, gallium phosphide, gallium arsenide, indium gallium arsenic, gallium selenide and gallium antimonide; 6 germanium related items, namely germanium metal, zoned germanium ingot, zinc phosphor germanium, germanium epitaxial growth substrate, germanium dioxide…

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Why Tungsten Needles Are Suitable for Microscopy Applications 78

The reason why tungsten needles can be used in microscopes is that they have some special properties and characteristics that make them suitable for various applications in microscopes. Here are some reasons: High melting point: Tungsten material has an extremely high melting point, about 3410 degrees Celsius. This allows this mental needle to withstand high-temperature environments in the applications of microscopy, such as electron microscopy, where they are used to generate beams of high-energy electrons. Its high melting point ensures…

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Tungsten Needles Are Applied in Microscopy 99

Tungsten needles are made from the material with high melting, high density, good corrosion resistance and electrical conductivity. They can be used for several applications in microscopy. Specifically, the following are common applications: Atomic Force Microscope (AFM): An atomic force microscope is a high-resolution surface topography measurement instrument. In AFM, needles made of tungsten are used as probes or probes. They interact with the sample surface to acquire high-resolution topographical images and measure surface forces and properties. Phonon Scanning Tunneling…

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Tungsten Copper Alloy: A Versatile Material for Demanding Applications 59

Tungsten copper alloy combines the advantages of copper and tungsten, with the advantages of high strength, high specific gravity, high temperature resistance, arc ablation resistance, good electrical and thermal conductivity and good processing performance. Given that, it has various applications as following: Electrical Contact Material Owing to high temperature resistance and electric ablation resistance, in the 1960s, some advanced countries used tungsten-copper alloys to manufacture electromagnetic fuses, throat linings on rockets and missiles, and other components. In addition, in the…

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Tungsten Copper Alloy: A Treasure of High Performance Alloy Material 57

Tungsten copper alloy is an alloy composed of two metals, tungsten and copper. Tungsten is a metal with a high melting point and high density, as well as excellent thermal conductivity and high strength. Copper has good electrical and thermal conductivity and is a commonly used electrical material. By alloying tungsten and copper, a tungsten-copper alloy can be obtained, and its composition ratio is usually between 70% and 50% tungsten. The tungsten content of the alloy can be adjusted according…

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Why Tungsten-copper Alloys Can Be Used as Electrical Contacts? 77

Tungsten-copper alloys are widely used as electrical contacts. An electrical contact is a key component used in the transmission and control of power and is commonly found in electrical equipment such as switchgear, relays, circuit breakers and contactors. The following is an overview of tungsten copper alloy as an electrical contact material: Excellent electrical conductivity: Tungsten-copper has good electrical conductivity, which is an ideal combination of the electrical conductivity of copper and the high melting point of tungsten. Compared with…

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Tungsten Copper Electrical Contacts Are Suitable for a Variety of Electrical Contact Applications 58

As an electrical contact material, tungsten copper alloy (WCu alloy) has excellent electrical conductivity, wear resistance, corrosion resistance, thermal expansion matching, high strength and pressure resistance, and high temperature stability. These properties make it an ideal material for electrical contacts and is widely used in many electrical devices. Tungsten copper electrical contacts are suitable for a variety of electrical contact applications, including high current circuit breakers, contactors, relays, switchgear and transformers, etc. They can provide stable contact performance in high-load…

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