Al₂O₃ Precision alumina ceramic grading wheel
Alumina ceramics have good insulation, thermal insulation and wear resistance. Because of their relatively low price and balanced performance, it is one of the most widely used ceramic materials. High-purity (99.5% and above) alumina has good corrosion resistance and plasma etching resistance, and is widely used in pan-semiconductor equipment.
Main features:
Insulation, heat insulation, wear resistance, corrosion resistance, plasma etching resistance.
main application:
Pan-semiconductor equipment (LCD and LED manufacturing equipment) spare parts, insulation parts, wear parts, general machinery, hydraulic parts.
Technical indicators:
Main ingredient content | 99% alumina |
99.9%alumina |
|
densityg/cc |
3.86 |
3.93 |
|
Water absorption% |
0 |
0 |
|
Mechanical properties |
Vickers hardnessGPa |
13.8 |
18.5 |
Bending strengthMPa |
350 |
350 |
|
Compressive strengthMPa |
2250 |
2600 |
|
Young's modulusGPa |
330 |
380 |
|
Poisson's ratio |
0.23 |
0.23 |
|
Fracture toughnessMPa·m1/2 |
3 |
4~5 |
|
Thermal characteristics |
Coefficient of linear expansion40~400℃*10-6/℃ |
7.1 |
8.2 |
Thermal conductivity20℃W/(m·K) |
25 |
32 |
|
Specific heatJ/(kg·K)*103 |
0.78 |
0.78 |
|
Thermal shock resistance ℃ |
200 |
220 |
|
Electrical characteristics |
Volume resistivity20℃ Ω·cm |
>1014 |
>1015 |
Dielectric strengthKV/mm |
16 |
17 |
|
Dielectric constant |
9 |
9.7 |
|
Dielectric loss factor*10-4 |
3 |
1 |
Relevant information
Member Qiao Xu: Eliminate the "one cut" plight of the pharmaceutical intermediate industry
Rising LED penetration rate drives high-purity alumina mid-end market
The 20th China International Rubber Technology Exhibition

Hotline:
021-65726586

Address:
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About us
The company insists on independent innovation, and has obtained a number of scientific research achievements and invention patents in the fields of rubber chemicals and ultrafine materials.
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