What is titanium diboride? Titanium diboride powderis gray or gray-black in color and has a hexagonal (AlB2) crystal structure. Its melting point is 2980℃ and has high hardness. Titanium diboride is resistant to oxidation in the air up to 1000°C and stable in HCl and HF acids. Titanium diboride is mainly used in the preparation of composite ceramic products. Because of its resistance to corrosion by molten metals, it can be used in the manufacture of molten metal crucibles and electrolytic cell electrodes.
What is the crystal structure of titanium Diboride? Titanium boride (TiB2) is the most stable compound of boron and titanium, which is a C32-type structure, bonded by its valence bond, and is a quasi-metallic compound of a hexagonal crystal system. The structural parameters of the complete crystal are 0.3028 nm for a and 0.3228 nm for C. The boron and titanium atomic planes alternate in the crystal structure to form a two-dimensional mesh, in which the B is combined with the other three Bs in covalent bonds, and the extra one electron forms a large π-bond. This graphite-like layered structure of boron atoms and Ti outer electrons determines the good electrical conductivity and metallic luster of TiB2, while the Ti-B bond between the boron and titanium atomic faces determines the high hardness and brittleness characteristics of this material.
Properties of titanium diboride. Among many compounds, metal borides have better high-temperature performance compared to metal carbides, for example, titanium diboride (TiB2) cermets are more suitable for high temperature and high erosion working conditions than titanium carbide (TiC) and tungsten carbide (WC) cermets. Titanium diboride powder is gray (or gray-black), has oxidation resistance in the air up to 1100 ℃, is a new type of ceramic material, has very excellent physical and chemical properties, in addition to the melting point is very high hardness, chemical stability, electrical and thermal conductivity, mechanical and mechanical properties at high temperatures are extremely excellent.
Characteristics of titanium diboride as structural and functional materials, respectively.
For structural materials.
The high strength and hardness of titanium boride make it possible to make tools, wire drawing films, sandblasting nozzles and hard tool materials, and it can also be an additive for composite materials.
For functional materials.
The resistivity of titanium boride is very similar to that of pure iron, so its application in functional materials is very "useful". Through the characteristics of the electrical properties of titanium boride, flexible PTC materials can be made.
What is titanium Diboride used for? 1. Titanium diboride as a conductive ceramic material. It is one of the main raw materials for vacuum coating conductive evaporation boats. 2. Titanium diboride as ceramic cutting tools and molds. Can manufacture finishing tools, wire drawing dies, extrusion dies, sandblasting nozzles, sealing components, etc. 3. Titanium diboride as a composite ceramic material. It can be used as an important component of multi-layered composite materials, and it can be used as a composite material with TiC, TiN, SiC and other materials to make various high-temperature resistant parts and functional parts, such as high-temperature crucibles, engine parts and so on. It is also one of the best materials for making armor protection materials. 4. Titanium diboride as a cathode coating material for aluminum electrolytic cells. Due to the good wettability of TiB2 and metallic aluminum liquid, TiB2 can be used as a cathode coating material for aluminum electrolyzers, which can reduce the power consumption of aluminum electrolyzers and extend the life of the electrolyzer. 5. Titanium diboride is made into PTC heating ceramic material and flexible PTC material, which is safe, power-saving, reliable and easy to process and shape, etc. It is a newer high-tech product of various electric heating materials. 6. titanium diboride is a very good reinforcing agent for Al, Fe, Cu and other metal materials.
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