Manufacturing pure tungsten rods involves several steps, including raw material selection, powder metallurgy, and sintering. First, high-purity tungsten oxide is converted into tungsten powder through a chemical reduction process. This powder is then pressed into a green body and sintered at high temperatures to form a solid tungsten rod. The sintering process is essential to achieve the required purity level and remove any residual impurities in the tungsten powder. Quality control measures are implemented throughout the manufacturing process to ensure that the final product meets strict purity standards.
What materials are used for pure tungsten rods?
The main materials used to make pure tungsten rods are unprocessed tungsten oxide, hydrogen, and graphite crucibles. Tungsten oxide is the raw material for producing tungsten powder, and hydrogen is an essential raw material for chemical reduction. Graphite crucibles are used during the sintering process to prevent contamination and maintain a sterile environment. In addition, the sintered tungsten rods are cooled with high-purity argon to prevent oxidation or other impurities from adhering to the surface
How does pure tungsten rod differ from tungsten alloy rods?
Pure tungsten rods are fundamentally different from tungsten alloy rods, which are made by combining tungsten with other metals such as nickel, copper, and iron. Tungsten alloys have different physical properties than pure tungsten, including increased density, higher melting points, and superior resistance to deformation. While tungsten alloys are popular in space exploration and military technology applications, pure tungsten is more suitable for applications such as electrical contacts, rocket nozzles, and cathode ray tubes.
What is the purity grade of tungsten rods?
The purity level of tungsten rods is usually expressed as a percentage of tungsten content. For pure tungsten rods, purity grades generally range from 99.95% to 99.999%. Achieving this high purity level is essential to maintaining tungsten’s superior properties, such as its high melting point, hardness, and electrical conductivity. Pure tungsten rods are used in various industries, including aerospace, electronics, medical devices, and nuclear energy.