Sintered AluminaSA-37

Description:

SA-37 is a pure sintered alumina which is produced by forming dense pellets of calcined alumina and firing them in Rotary Kiln of a temperature over 1,800℃. It has compact internal structure and is a high purity polycrystalline sintered product of corundum which contains over 99.5% of Al2O3.

Properties:

  • Excellent thermal volume stability and High melting point
  • High mechanical strength
  • Good thermal shock resistance
  • High thermal conductivity and Great electrical insulation
  • Extreme hardness and high abrasion resistance

Chemical Composition (wt. %):

CompositionSpecificationTypicalCompositionSpecificationTypical
SiO20.10 max0.01MgO-0.02
Al2O399.0 min99.41Na2O0.30 max0.24
Fe2O30.10 max0.02K2O-0.01
CaO-0.29---

Physical Properties:

Property SA-37 SAB
Specification Typical Specification Typical
Apparent Bulk Density (g/㎤)-3.81-3.81
Bulk Density (g/㎤)3.60 min3.703.45 min3.60
Water Absorption (%)-0.70-1.50
Apparent Porosity (%)5.00 max2.6010.00 max5.40
Specific Gravity (g/㎥)-3.96-3.96

Particle Size Distribution:

Item Unit Specification Typical
8-5 ㎜ +9.50 -5.60 +9.50 -5.60
% 10 max 10 max 3.81 3.67
6-3 ㎜ +6.70 -3.35 +6.70 -3.35
% 3 max 10 max 0.47 6.39
3-1 ㎜ +3.35 -1.00 +3.35 -1.00
% 5 max 10 max 1.85 1.20
1-0 ㎜ +1.00 -0.212 +1.00 -0.212
% 5 max 35 max 1.30 20.47
220 mesh +0.30 -0.075 +0.30 -0.075
% 5 max 60-85 0.50 78.58
325 mesh +0.045 -0.045 +0.045 -0.045
% +5 max 95 min 1.36 98.64
30-10 ㎜ - +9.5 - +9.5
% - 90 min - 95

The typical product properties are based upon the actual averages from product data. The Min/Max data show our standard product specification data for these products. Other sizes are available upon request.