Tungsten News

Tungsten News
How to store Barium Tungsten Cathode? 112

The barium tungsten cathode is composed of a porous substrate and nitrate barium evenly filled in it. The BaO component in the nitrate barium easily absorbs moisture and other impurities. In order to ensure the effectiveness of barium tungsten products, it is required not to be exposed to the atmosphere for more than 48 hours before use, and moisture, dust and other pollutants must be prevented from contacting the products to the greatest extent. To ensure the best performance, it…

Tungsten News
Barium Tungsten Cathode for Xenon Flash Lamp 156

Barium tungsten cathode is a common cathode material in xenon flash lamp that is a device that uses the discharge of xenon to generate intense light flashes. It is widely used in photographic flash lamps, laser systems, high-speed photography, medical equipment, xenon lasers and other fields. In a xenon flash lamp, the BaW cathode acts as the electron generator. When xenon discharges, the generated electron flow will hit the cathode, which will excite the tungsten in the BaW cathode to…

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How to Produce Barium Tungsten Cathode? 160

Barium tungsten cathode is a composite material consisting of barium oxide and tungsten, providing a stable electron source or photoelectron source for electronic devices. How to produce barium tungsten cathode? The following processes are their regular steps. Raw material preparation: purchase high-quality tungsten powder and barium compound to ensure that the raw materials meet the production requirements. Mixing and grinding: according to the specific formula ratio, mix tungsten powder and barium compound, and put the mixture into a ball mill…

Tungsten News
What Are the Applications of Barium Tungsten Cathode? 116

Barium tungsten cathode is a cathode material used in electronic devices, and its applications are as following: Xenon flash lamps: the lamps are widely used in photographic flash lamps, laser systems, high-speed photography, medical equipment, xenon lasers and other fields to produce intense light flashes. X-ray Tubes: BaW cathodes are commonly used in X-ray tubes as an electron source. When a high voltage is applied, the cathode emits electrons, which are accelerated towards the anode, producing X-rays when they strike…

Tungsten News
What Is Barium Tungsten Cathode? 180

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 149

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 129

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 112

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 133

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…

Tungsten News
Tungsten Needles Are Applied in Microscopy 155

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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