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 HOME Technical Know-Howharacteristics of Aluminum Oxide Physical characteristic list 1 |
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 Alumina’s physical characteristic list 1
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| Property |
Unit |
SWT-850 |
SWT-940 |
SWT-960 |
SWT-998 |
TEST
METHODE |
Remarks |
| Composition |
Al₂0₃ |
% |
86.5 |
94.0 |
96.2 |
99.8 |
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| Si0₃ |
% |
8.5 |
4.0 |
2.7 |
0.2 |
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| MgO |
% |
3.4 |
1.0 |
1.0 |
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| CaO |
% |
1.5 |
1.0 |
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| Fe₂0₃ |
% |
0.03 |
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| specific gravity |
- |
3.41 |
3.62 |
3.72 |
3.90 |
KSL-1201 |
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| Apsorptance |
% |
0.0 |
0.0 |
0.0 |
0.0 |
KSL-1001 |
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| surface gross |
㎛ |
2.5 |
1.6 |
1.6 |
1.0 |
KSL-0161 |
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| hardness |
MOHS |
9.0 |
9.0 |
9.0 |
9.0 |
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| HRA |
73 |
76 |
78 |
83 |
KSB-0806 |
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| Compressive strength |
Kgf/㎠ |
18,000 |
21,350 |
24,000 |
26,600 |
KSL-1203 |
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| Bending strength |
Kgf/㎠ |
2,600 |
2,900 |
3,100 |
3,850 |
KSL-1591 |
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| Tensile strength |
Kgf/㎠ |
1,540 |
1,960 |
1,960 |
3,850 |
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| Thermal expansion coefficient |
X10-6/℃ |
7,2 |
7,9 |
8,2 |
8,3 |
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| use temperature |
℃ |
1,500 |
1,700 |
1,700 |
1,750 |
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| thermal conductivity |
Cal/Cm.Sec.℃ |
0,035 |
0.043 |
0.059 |
0.085 |
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| Color |
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WHITE |
WHITE |
WHITE |
IVORY |
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