鈦粉及其用途
What is titanium-powder.html>titanium powder
Titanium powder refers to the titanium particle group with the size less than 1mm, which belongs to loose materials. Its performance integrates the characteristics of titanium matrix and the commonness of powder body. The properties of titanium powder, like other powders, include chemical properties, physical properties and technological properties of powders. However, titanium powder and other powders have a common physical property of large specific surface, so titanium powder also has a large surface free energy. Therefore, titanium powder is more active than titanium metal, easier to react with other elements or compounds, more oxidation, flammable, explosive, belongs to a dangerous goods. Its purity and various properties largely depend on the preparation method and technological conditions.
Titanium powder for silver gray powder, can burn in nitrogen, high melting point. Titanium can be hydrogenated by adding hydrogen in a vacuum at high temperature. After inhaling a lot of hydrogen, it becomes titanium hydride. Titanium hydride is easy to embrittlement and easier to be made into powder.
Titanium hydride powder generally contains 4% hydrogen, silver dark gray, and will release hydrogen at high temperature. At present, this technology is used to make "aluminum foam" titanium hydride powder because of hydrogen, to make pure titanium powder, it needs to go through high temperature vacuum, vacuum for a lot of time, and reduce to titanium powder. Titanium powder is stable at room temperature and has strong combining ability at high temperature. It can combine with oxygen, carbon, nitrogen, hydrogen and many other elements. Pure titanium powder will have suction function at high temperature, so in the electronics industry application of pure titanium powder as "getter".
What is the purity of titanium powder
Titanium powder includes titanium content and impurity content. The purity of titanium powder is related to its size. For products of the same specification, the smaller the size, the lower the purity. Usually, titanium containing more than (or equal to) 99%, or close to 99% (crude) titanium powder is called grade products (if titanium powder, should include alloy components), than its purity is lower called equal foreign products. In grade titanium powder, in addition to special purpose requirements, general requirements to use oxygen content to grade (and with titanium content is the same), that is, the lower the oxygen content, the higher the quality, which often oxygen content less than 0.15% is called high quality titanium powder.
What are the uses of titanium powder
Titanium powder is widely used. Grade titanium powder has different uses according to different purity and size, it is mainly used as powder metallurgy titanium or titanium containing raw materials. Other applications are used as electric vacuum getter, raw material for solid gong sources in electric vacuum, and surface coating materials. Plastic titanium filling agent and various titanium compounds (such as TiB2, TiN, TiC, etc.) raw materials.
Dihydrogenated titanium powder can be used as ceramic and metal welding agents, pure hydrogen source materials and powder metallurgy sintering catalysts.
Titanium powder is also used in "metal additives", used as titanium agent, as additives titanium powder can be divided into titanium content: Ti≥88%Ti≥90%Ti≥92%Ti≥95%Ti≥97%Ti≥98%. Particle size is divided into 40 mesh 60 mesh 80 mesh 100 mesh can be used as "titanium agent".
Isoexternal titanium powder is mainly used as grain refiner for cast aluminum and deflagration agent for fireworks and ceremonies. Titanium powder will give off white sparks when it burns. Titanium powder meets open fire and strong friction flammable, fireworks commonly used titanium powder for outdoor 100 mesh, 200 mesh powder for indoor cold fireworks. The higher the purity, the whiter the spark.
