Titanium powder
Pure titanium powder, alloy titanium powder, titanium hydride powder, metal titanium powder, sponge titanium powder, titanium nitride powder, and carbonized titanium powder. Titanium particles below 0.83mm are called titanium powder.
Titanium powder, silver gray powder foam, can burn in nitrogen, with high melting point. Titanium can be hydrogenated by adding hydrogen under vacuum and high temperature. After absorbing a large amount of hydrogen, it becomes titanium hydride. Titanium hydride is easy to embrittle, and it is relatively easy to make powder. It is a common method for mass production of titanium powder at present.
The hydrogen content of titanium hydride powder is generally 4%, silver is dark gray, and hydrogen will be released under high temperature. At present, the application of this technology to make "foam aluminum" titanium hydride powder, because of the hydrogen content, needs to be made into pure titanium powder under high temperature and vacuum, and a lot of time is spent vacuuming to reduce it to titanium powder. Titanium powder has stable properties at room temperature and strong combining ability at high temperature. It can combine with oxygen, carbon, nitrogen, hydrogen and many other elements. Pure titanium powder can absorb air at high temperature, so pure titanium powder is used as "getter" in the electronic industry
Titanium powder will emit white sparks during combustion. Titanium powder is flammable in case of open fire and strong friction, and is widely used in fireworks. The commonly used titanium powder for fireworks is 100 mesh for outdoor, and 200 mesh for indoor cold light fireworks. The higher the purity, the whiter the spark.
Titanium powder is also used in "metal additives". As a titanium agent, titanium powder can be divided into titanium content: Ti ≥ 88% Ti ≥ 90% Ti ≥ 92% Ti ≥ 95% Ti ≥ 97% Ti ≥ 98%. The particle size is divided into 40 meshes, 60 meshes, 80 meshes and 100 meshes, which can be used as "titanium agent".
It took more than one hundred years for the metal from the discovery of titanium to the preparation of pure products. At present, the main production place of titanium powder is Shaanxi, and it was after the 1940s that titanium was really used and its true face was recognized. In 1947, people began to smelt titanium in factories. In that year, the output was only 2 tons. In 1955, the output surged to 20000 tons. In 1972, the annual output reached 200000 tons.
The hardness of titanium is about the same as that of steel, but its weight is almost half of that of steel of the same volume. Although titanium is slightly heavier than aluminum, its hardness is 2 times greater than aluminum. Extremely fine titanium powder is also a good fuel for rockets, so titanium is known as the space metal and the space metal. Titanium has good heat resistance and its melting point is up to 1725 ℃. At room temperature, titanium can lie safely in various strong acid and alkali solutions. Even the fiercest acid, aqua regia, cannot corrode it. The biggest disadvantage of titanium is that it is difficult to extract. The main reason is that titanium has strong combining ability at high temperature and can combine with oxygen, carbon, nitrogen, hydrogen and many other elements.
