Titanium nitride (TiN) as the typical NaCl structure, is a face-centered cubic lattice and lattice constant a = 0.4241 nm, including titanium atoms in the face-centered cubic horns. TiN is stoichiometric compounds, the composition of the stable range for TiN0.37 - TiN1.16, the content of nitrogen can be within a certain range of change and not due to structure change of TiN. General yellowish-brown TiN powder, superfine TiN powder in black, and TiN crystal are golden. TiN melting point is 2950 ℃, density of 5.43 5.44 g/cm3, 8-9 mohs hardness, good thermal shock. TiN melting point higher than the melting point of most of the transition metal nitrides, and the density is lower than most of the metal nitrides, therefore is a kind of heat resistant material. TiN similar crystal structure and crystal structure of TiC, only the C atom displacement into N atoms.
Titanium nitride (TiN) is fairly stable compounds, at high temperatures with iron, chromium, calcium and magnesium metal reaction, such as TiN, crucible in CO and N2 atmosphere and the acidic slag and alkaline slag, TiN crucible is therefore research just liquid interact with some elements of good container. TiN in a vacuum heating loss of nitrogen, the nitrogen content in low titanium nitride.
TiN with attractive golden color, high melting point and hardness, good chemical stability, and the wetting of the metal structure of small materials, and has high electrical conductivity and superconductivity, can be applied to high temperature structural materials and superconducting materials.
No comments:
Post a Comment