Type: | Industrial |
---|---|
Material: | Ceramics |
Raw Material: | Alumina |
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Item
|
|
Unit
|
95Al2O3
|
96 Al2O3
|
99 Al2O3
|
Physical Characteristics
|
Heat resistance
|
ºC
|
1500
|
1550
|
1800
|
Bulk density
|
g/cm3
|
3.6
|
3.6
|
3.9
|
|
Water absorption
|
%
|
0
|
0
|
0
|
|
Mechanical Characteristics
|
Flexural strength
|
Mpa
|
320
|
340
|
360
|
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
|
(20-500ºC) 10-6/ºC
|
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
|