Applications
Widely used in deep processing of various ceramic material, enamels,sand glasses, as grinding media in ball mills and vibration mills.
Model |
99% Pure alumina Ceramic Ball |
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Color |
White |
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Shape |
Ball |
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Chemical composition |
|
Min. % |
Max. % |
Usual % |
|
|
Al2O3 |
99 |
99.6 |
99.3 |
|
|
SiO2 |
/ |
0.2 |
0.18 |
|
|
Fe2O3 |
/ |
0.2 |
0.02 |
|
|
TiO2 |
/ |
0.55 |
0.02 |
|
|
CaO |
/ |
0.1 |
0.2 |
|
|
MgO |
/ |
0.1 |
0.05 |
|
|
Na2O |
/ |
0.25 |
0.1 |
|
|
K2O |
/ |
0.2 |
0.13 |
|
Physical properties |
Leachable Iron (%) |
≤0.01 |
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|
Apparent Porosity by Weight (%) |
≤7.0 |
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|
H2O absorption (wt.%) |
<4.0 |
|||
|
Acid resistance (%) |
>99.8 |
|||
|
Alkaline resistance (%) |
≥90 |
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|
Bulk Density |
(g/cm3) |
2.1 |
||
|
|
(lb/ft3) |
131 |
||
|
Specific density |
(kg/m3) |
3400 |
||
|
|
(lb/ft3) |
212 |
||
|
Moh’s hardness (scale) |
>8.0 |
|||
|
Thermal conductivity (w/m2.k) |
0.7-0.8 |
|||
|
Max. Operating Temperature |
(℃) |
1550 |
||
|
|
(℉) |
2822 |
||
|
Thermal expansion (%) (500℃) |
0.10 |
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|
Thermal Shock Stability (times) (1000℃ then water cooling) |
10 |
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