Alumina-Zirconia 40% Abrasive – Superior Hardness & Precision
GNPGraystar’s Alumina Zirconia 40% is a hard, very tough, sharp abrasive. It is produced by fusing zircon sand and alumina at about 1900°C.
Properties
General
| Property | Value | Comment |
|---|---|---|
Bulk density | 2.02 - 2.34 g/cm³ | ANSI B74.4 |
Crystal size | 12.0 μm | |
True particle density | 4.6 g/cm³ |
Mechanical
| Property | Value | Comment |
|---|---|---|
Hardness, Knoop, HK2 | 1600 [-] | Knoop (100) |
Hardness, Mohs | 9.0 [-] |
Thermal
| Property | Value |
|---|---|
Melting point | 1900.0 °C |
Chemical properties
| Property | Value | Testing Standard | Comment |
|---|---|---|---|
Aluminium | 60 % | ANSI B74.14 | max. Al₂O₃ |
Calcium | 0.09 % | ANSI B74.14 | CaO |
Iron | 0.25 % | ANSI B74.14 | Fe₂O₃ |
Magnesium | 0.02 % | ANSI B74.14 | MgO |
Silicon | 0.33 % | ANSI B74.14 | SiO₂ |
Sodium | 0.03 % | ANSI B74.14 | Na₂O |
Titanium | 0.25 % | ANSI B74.14 | TiO₂ |
Zirconium | 39 % | ANSI B74.14 | ZrO₂ |
Technological properties
| Property | ||
|---|---|---|
| Application areas | GNPGraystar’s Alumina Zirconia 40% is used for both coated abrasive products and organic bonded grinding wheels. | |
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