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The Properties And Application of Titanium nitride

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Titanium Nitride (TiN), a non-stoichiometric compound, has a structure similar to NaCl. It is a face centered cubic lattice, whose lattice constant is a=0.4241nm. In this structure, titanium atoms can be found at the corners tops of a face centered cubic. TiN has a nonstoichiometric composition, which is TiN0.37 – TiN1.16. Changes in nitrogen content are possible within a specified range, without affecting the structure of TiN. TiN powders are usually yellowish-brown, ultrafine powders are black and TiN crystalline forms are golden-yellow. TiN has an excellent thermal shock resistance, a melting temp of 2950degC and a density of 5-4.44g/cm3. TiN is more heat-resistant than other transition metal nitrides because it has higher melting points but lower densities. The TiN crystalline structure is very similar to TiC. However, the N atoms are used instead of C atoms.
Nature Introduction

TiN is an extremely stable compound. It will not reacted with metals, such as iron and chromium at high temperature. Also, TiN crucibles won’t react with acidic Slag in CO and N2 atmospheres. The TiN Crucible is used in conjunction with alkaline Slag and is therefore an ideal container to study the interactions between molten iron and certain elements. TiN, when heated under vacuum, loses nitrogen and becomes titanium nitride with low nitrogen content.

TiN has a beautiful golden color. It also has a very high melting temperature, possesses exemplary chemical stability, and is not wettable to metals. It has a superconductivity, high electrical conductivity, and can be used to make structural materials for high temperatures. It is also superconducting material.

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