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Item |
Unit |
95 alumina |
96 alumina |
99 alumina |
|
Physical Characteristics |
Heat Resistance |
0C |
1500 |
1550 |
1800 |
Bulk Density |
g/cm3 |
3.6 |
3.6 |
3.9 |
|
Water Absorption |
% |
0 |
0 |
0 |
|
Flexural Strength |
Mpa |
320 |
340 |
360 |
|
Mechanical Characteristics |
Hardness Vickers |
Gpa |
12.2 |
13.5 |
15.6 |
Elastic Modulus |
Gpa |
280 |
320 |
370 |
|
Poisson's Ratio |
- |
0.22 |
0.23 |
0.23 |
|
Thermal Characteristics |
Linear Expansion Coefficient |
(200C-5000C) 10-6/0C |
7.1 |
7.2 |
8 |
Thermal Conductivity |
w/(m.k) |
16 |
24 |
32 |
|
Specific Heat |
*10-3J/(kg*K) |
0.78 |
0.78 |
0.9 |
|
Electrical Characteristics |
Dielectric Constant (1MHZ) |
- |
9 |
9.4 |
9.9 |
Dielectric Loss Angle |
*10-4 |
15 |
5 |
1 |
|
Dielectric Strength |
*106V/m |
12 |
15 |
15 |
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