Zirconium nitride
- Zirconiummononitrid
- Zirconium nitride
Yellow to brown odorless solid
Fixed
7.09 g · cm -3
2980 ° C
- Insoluble in water
- Soluble in concentrated sulfuric acid and hydrofluoric acid
Attention
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Zirconium is an inorganic chemical compound of zirconium from the group consisting of the nitrides.
Production and representation
Zirconium nitride can be represented by the same procedures as titanium nitride.
- Yellow Brown zirconium is obtained in the synthesis from the elements at 1200 ° C.
- In the production of zirconium nitride of zirconium (IV ) chloride by the growth method is a lower temperature (2000 to 2400 ° C ) than in pure nitrogen (2900 ° C) in the presence of hydrogen ( H2 N2 or ammonia). In the latter case, the deposition is significantly slower than in the presence of hydrogen. By nitriding of zirconium wires, that is, by heating in pure nitrogen lying temperature is obtained even with a slightly below the melting point of zirconium (1860 ° C) very slowly zirconium and also in highly fanned, brittle state.
- At relatively low temperatures can be defined zirconium phases by the ammonolysis of the zirconium halides, particularly zirconium (IV ) iodide via the intermediate Zirconiumnitridiodid ZrNi obtained. At 700 ° C blue zirconium ZrxN formed is mainly brown Zr3N4 (o- Zr3N4 with a density of 6.32 g/cm3, and the space group Pnam ), at 750 ° C (x = 0.94 to 0.81 ), above 1000 ° C arises from the metallic conducting yellow zirconium.
- Under high-pressure conditions were formed at or ammonolysis reaction of ZrN with a nitrogen Zr3N4 cubic zirconium Th3P4 - type with the space group I43d.
Properties
Zirconium nitride is a very hard and brittle yellow Rauner odorless solid. It has a cubic crystal structure of the sodium chloride type with space group Fm3m.
Use
Zirconium nitride (e.g., zirconium nitride multi-layer coating ) is used as a hard coating material.