nano alumina powder

of nano alumina powder

The main material of Brown Aluminium Oxide is bauxite, which is electrically fused at high temperature. It is brown and features high hardness and toughness. The abrasive tools made by Brown Aluminium Oxide are suitable for grinding carbon steel, malleable cast iron, hard bronze etc.In addition, it is also widely used in refractory materials, chemical additives, precision casting and antiskid material, etc.

Parameter index of nano alumina powder
The three party system: physical properties of crystal
Chemical properties: Gender
Reaction with acid: slightly in aqua regia and hydrofluoric acid corrosion
Reaction with alkali: only a reaction heat and alkali solution
Redox effect: no
Density: 3.90 g/cm3
Knoop hardness: the hardness of 2000 - 2200 Kg/mm2, Mohs hardness of 9
Color: dark brown, deep blue color after calcination
Melting point: 2250 C
Maximum temperature: 1900 C
The specific heat (Cal/g. C): 0.26 (20 - 90 C)
Thermal conductivity at room temperature of 900 C
(Cal/cm3. sec. C)
Refractive index: e=1.760 w=1.768 (Na line)
30 C 300 C resistivity: 900 C 1600 C (CM)
Linear expansion coefficient: 7 - 9 (0 - 1600 C)