yixing haiyu refractory co.,ltd
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high hardness a-al2o3 alumina high temperature calcination quality is stable low sodium content
1.Introduction of low sodium alumina
Low sodium alumina is a high purity and fine α-alumina powder with uniform grain size. It is mainly used in polishing of metal, glass and various ceramic products and firing additives of non-oxide ceramics. The series of products have stable performance, good molding process performance and wide application range. Its original crystal particles are large ( about 3-5μm ), low iron, low sodium, good fluidity and good electrical properties. It is especially suitable for hot die casting and grouting molding to produce ceramic products, and the shrinkage rate of the products is small ( 14-15 % ). In addition, low sodium alumina also has the characteristics of high melting point ( 2040 °C ), strong chemical inertness, good electrical insulation, high hardness and good wear resistance. It can also be used for a variety of high temperature ceramic parts ( spark plug, etc. ), wear-resistant ceramic parts ( mortar pump shaft piston pump lining, impeller, grinding medium ball, etc. ), textile porcelain, water valve plate, perm plate, electronic substrate, electric vacuum tube and shaped and shaped refractory materials, etc., and has a very broad application prospect.
2.performance index
|
model |
AL2O3(≥%) |
impurity content ≤(%) |
a-transformation rate |
||
| SiO2 | Fe2O3 | Na2O | |||
| HY-01 | 99.7 | 0.03 | 0.025 | 0.05 | 96 |
| HY-02 | 99.6 | 0.05 | 0.025 | 0.05 | 96 |
|
model |
true density ≥(g/cm³) |
mean diamete D50 (μm) |
original grain diameter (μm) |
| HY-01 | 3.96 | 70±5 | 3-5 |
| HY-02 | 3.96 | 5±0.5 | 3-5 |