Haixin is one of the leading and professional CrSi2 Chromium Silicide manufacturers in China. Providing you with good after-sales service and quick delivery, we warmly welcome you to high quality CrSi2 Chromium Silicide at the most competitive price with us.
CrSi2 Chromium Silicide
Chinese Name: chromium silicide
English Name: chromium silicide
Density (g / ml, 25 / 4 ℃): 5.5
Melting point: 1490 º C
Molecular formula: CrSi2
Molecular weight: 108.16700
Accurate mass: 107.89400
Appearance: silver to black powder, odorless, insoluble in water, soluble in hydrochloric acid and hydrofluoric acid.
Stability: it will not decompose when used and stored according to specifications. Chromium silicide is a gray tetragonal prism crystal, insoluble in water, sulfuric acid and nitric acid, soluble in hydrochloric acid and hydrofluoric acid. Stable in air at normal temperature; At 100 ℃, the surface is oxidized; 4chemicalbook reacts violently with chlorine at 00 ℃ to form chromium trichloride and silicon tetrachloride.
Performance: chromium silicide film has high resistivity and low temperature coefficient of resistance. Gray cubic crystal, hexagonal crystal system, a = 04422nm, C = 06351nm, melting point close to 1550 ℃, chromium silicide film has high resistivity and low resistance temperature coefficient. Chromium silicide film has high resistivity and low temperature coefficient of resistance.
1. After mixing the silicon powder and chromium powder, calcine it in hydrogen at 900 ~ 1100 ℃ and cool it. Alternatively, the mixture of chromium powder and silicon powder and the mixture of silicon dioxide powder and silicon powder are mixed evenly, roasted in a hydrogen gas stream, and the volatile SiO formed by SiO2 and Si powder escapes together with Na and K in the raw material to obtain CrSi2.
2. The melting point of Cr3Si (cubic crystal) is about 1710 ℃, Cr5Si3 (tetragonal crystal, melting point about 1600 ℃), CRSI (cubic crystal, melting point about 1600 ℃), CrSi2 and cr3si2 can be obtained by CO melting or sintering chromium and silicon powder in vacuum or under the protection of hydrogen.
3.48.1 parts (particle size: 1100) μ M U.M and 51.9 parts of chromium powder having a particle size of 50 μ M U.M and 3 parts of silica powder having a particle size of 10 μ M U.M was mixed with 1.5 parts of silicon powder. The two mixtures were homogenized again. Calcine in hydrogen gas stream at 1100 ℃ for 1h, and then calcine at 1430 ℃ for 10min. The volatile SiO formed by SiO2 and Si powder escapes together with Na and K in the raw material to obtain CrSi2 sintered body with fine powder containing only 0.5% Na × 10-6，Ｋ0.1 × 10-6。
Storage and transportation: store in a cool and ventilated warehouse. Keep away from kindling, heat source and packaging.