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Material Code |
A99 |
A96 |
A92 |
A85 |
M98 |
Z94 |
Z81 |
||
Alumina, Al2O3 |
Magnesia, MgO | Stabilized Zirconia, ZrO2 | |||||||
| Chemical Compostion | Al2O3 |
% |
99.5 |
96.2 |
92.1 |
85.1 |
. | . | . |
SiO2 |
. | 3 |
5 |
10 |
. | . | . | ||
MgO |
. | . | . | . | 98.5 |
. | . | ||
ZrO2 |
. | . | . | . | . | 94.5 |
81.1 |
||
Y2O3 |
. | . | . | . | . | 5.0 |
17 |
||
Apparent Specific Garvity |
g/cm3 |
3.9 |
3.7 |
3.6 |
3.4 |
3.5 |
6.05 |
5.9 |
|
Bulk Specific Gravity |
g/cm3 |
¤Ñ |
¤Ñ |
¤Ñ |
¤Ñ |
2.6 |
¤Ñ |
4.6 |
|
Apparent Porosity |
% |
¤Ñ |
¤Ñ |
¤Ñ |
¤Ñ |
25 |
¤Ñ |
23 |
|
Compressive Strength |
Kg/cm3 |
27,000 |
24,000 |
21,000 |
18,000 |
¤Ñ |
8 |
¤Ñ |
|
Bending Strength |
Kg/cm3 |
3,800 |
3,100 |
2,800 |
2,600 |
200 |
12,000 |
250 |
|
| Hardness(Hv) | Kg/mm2 |
1,700 |
1,400 |
1,250 |
1,150 |
¤Ñ |
1,200 |
¤Ñ |
|
Thermal Conductivity |
cal/cm. sec.oC |
0.07 |
0.06 |
0.05 |
0.04 |
0.03 |
0.07 |
0.05 |
|
Coef. Of Thermal Expansion |
x 10-6 (1000oC) |
7.8 |
7.4 |
7 |
6.7 |
12 |
10 |
9.8 |
|
| Thermal Shock Resistance |
ToC |
250 |
200 |
200 |
200 |
200 |
280 |
280 |
|
| Service Temperature |
Maximum |
oC |
1,800 |
1,700 |
1,650 |
1,600 |
1,800 |
2,000 |
2,000 |
Common |
1,700 |
1,600 |
1,500 |
1,500 |
1,700 |
1,800 |
1,800 |
||