Calcined Alumina

Calcined Alumina Alumina, white crystallized powder, is made by calcining Aluminum Hydroxide and the chemical formula is Al2O3. It is a typical a-Alumina(Corundum) widely used. It is widely used for flame retarders, insulating materials, spark plug, IC board, abrasive, brightener and etc by high melting temperature, high mohs hardness, high electricity resistibility, stable reactivity to acid and alkali. General Physical Properties Mineral name Corundum Specific gravity 3.98 Melting temperature 2053°C Refractive index 1.76 Mohs hardness 12 Vicker's hardness 2300 Young's modulus 4.8 x 105V/cm Specifications(KC Part) Product name Dp50(µm) Na2O(%) SSA(m2/g) UnitCrystalsize(m) Use CA CA-83F 60±10 0.30 0.3~0.7 3~5 Spinel, Fused Alumina,Mullite, Refractories, Castable CA-50F 50±10 0.35 0.3~0.7 3~5 Spinel, Fused Alumina,Mullite, Refractories, Castable SA-50D 55±10 0.30 3~7 0.5~1.0 Sintered Alumina, Mullite,Ceramic fiber, High-Alumina Fine CA CA-5M 4.0±1 0.35 - 3~5 Insulator, Crucible, Spinel,Welding rod, Lapping filler Specifications(KA Part) Product name Dp50(µm) Na2O(%) SSA(m2/g) UnitCrystalsize(m) Use KSASeries KSA-S 55 Max 0.30 3~4 <1 Sintered alumina,Mullite, Castable refractory,Ceramic fiber, High-Alumina KSA-M 65 Max 0.30 KSA-P 100 Max 0.30 KLS Series KLS-S1 55 Max 0.10 3.5 <1 Spark plug, Electronic parts,Fine ceramics, Porcelain,Grinding tool etc. KLS-S2 Max 0.10 1.5 1~3 KLS-S3 Max 0.10 0.5 2~4 KLS-M 65 Max 0.10 1.5 1~3 KLS-P 100 Max 0.10 0.5 1~3 KES Series KAM 3~4 Max 0.30 1.0 2~4 Insulator, Spinel, Refractory, Porcelain KES-L1 0.5~0.7 Max 0.10 6.0 0.3~0.4 IC package, IC broad,Cutting tool, Automobiles engine KES-L2 2.5 Max 0.10 3.0 0.4~5.0 KES-M1 0.6 Max 0.20 6.0 0.4 KES-M2 2.3 Max 0.20 3.5 0.4~5.0 KES-N1 0.6 Max 0.30 6.5 0.3 Prevalent alumina refractory,Alumina porcelain, castable KES-N2 2.5 Max 0.30 3.5 0.3~4.0