Chromium oxide green
[Chinese name] chrome oxide green
[English name] oxide green chrome, oxide green chromium
[alias] s N Y N have a Cr2O3 and Hu, R and S
[chemical] Cr2O3
Chrome oxide green by chromic acid, sodium bichromate (or potassium) and sulphur by calcination. The thermal decomposition of the ammonium dichromate or. High temperature resistance, light resistance, resistance to various chemicals. Products of pure natural chlorophyll near infrared reflectance (Al2O3) close to the Mohs hardness only to diamond, corundum. With metallic luster, with magnetic, strong hiding power, high temperature resistant, resistant to sunlight, insoluble in water, soluble in acid, in the atmosphere is relatively stable, did not affect the concentration of acid and alkali and sulfur dioxide gas, is to highlight the excellent quality of pigment and fastness. Insoluble in water, acid and organic solvents, slightly soluble in concentrated sodium hydroxide solution, dissolved in hot sodium bromate solution and heat concentrated perchloric acid solution or boiling parathion mixed acid. The light, atmosphere, and corrosive gases (H2S, SO2, etc.) are extremely stable and good weather resistance. In case of thermal stability, is the quality of refractory materials. Chromic oxide mainly used in metallurgy, paint, polishing, refractory materials and new development of the molten coating etc..
Physical and chemical index
Syngony
Six party system
colour
Green powder
Chemical formula
Cr2O3
molecular weight
One hundred and fifty-one point nine nine
density
5.21g/cm3
Mohs hardness
8.5-9
Refractive index
Two point five
Specific heat
(20 degrees C) /0.17J/ (g, K)
melting point
2265 degrees C
boiling point
3000 degrees C
Chromium oxide green application
Chrome oxide green for smelting metal chromium and chromium carbide, enamel, ceramics, glass, artificial leather, refractory materials, building materials, coloring, catalysts for organic synthesis, manufacturing fast material and the printing of paper money in the special ink, metal polishing abrasive materials, metal surface infiltration chromium, magnetic materials. Used in coatings, ceramics, rubber, fine arts pigments, and camouflage coatings.