Aluminium oxide ceramics
The main properties of alumina (Al2O3):
The main areas of use from corundum (aluminum oxide):
There are several modifications of aluminum oxide depending on the content of the main phase and impurities, which differ in strength and chemical resistance.
Al2O3 |
% |
60 |
75 |
80 |
85 |
92 |
95 |
99 |
99.7 |
Density |
g/сm3 |
3.0 |
3.1 |
3.3 |
3.4 |
3.6 |
3.7 |
3.81 |
3.85 |
Bending strength |
MPа |
205 |
280 |
215.7 |
230 |
312 |
304 |
340 |
370 |
Coefficient of linear thermal expansion |
10-6/оС (25-800оС) |
7.1 |
7.6 |
7.6 |
7.6 |
7.5 |
7.3 |
7.6 |
7.6 |
Dielectric Strength |
kV/mm |
10 |
|||||||
Electrical resistivity |
20°С ,Ω•сm |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
>1014 |
Operating temperature |
оС |
1350 |
1000 |
1250 |
1290 |
1390 |
1480 |
1600 |
1700 |
Mohs' hardness |
7.5 |
7.5 |
7.5 |
7.5 |
8.5 |
8.8 |
9.0 |
9.0 |
|
Fire resistance |
оС |
1800 |
1700 |
1800 |
1850 |
1920 |
2000 |
2030 |
2040 |
LLC NPO GKMP supplies custom-made products from oxide ceramics of various sizes according to individual requests of the customer.