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Alumina & Zirconia Toughened Alumina (ZTA) Properties
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Copyright © 2016 Semiconductor Enclosures, Inc
92% Alumina (Al2O3)
94% Alumina (Al2O3)
99.8% Alumina (Al2O3)
Zirconia Toughened
Alumina (ZTA)
Color:
Black
White
White
White
Crystal Size (µm):
8
8
8
6
Water Absorption (%):
0
0
0
0
Density (g/cc):
3.67
3.67
3.91
4.3
Hardness (V):
12
13
15
14.5
Fracture Toughness (MPam^0.5):
3~4
4~5
3~4
6
Flexural Strength (MPa):
360
430
450
640
Modulus (GPa):
320
320
380
338
Compressive Strength (MPa):
1800
2200
2300
2800
CTE (x10^-6/°C):
7
7
6.5
6
Thermal Conductivity @25°C (W/mK):
20
25
30
25
Specific Heat (J/gK):
0.79
0.78
0.79
-
Dielectric Strength (KV/mm):
12
16
16
14
Dielectric Constant (@ 1MHz):
10
9.5
10
12.4
Dielectric Constant (@ 1GHz):
10
9.5
9.6
9.5
Dielectric Loss (@ 1MHz):
0.0013
0.0003
0.0001
0.0005
Volume Resistivity:
>10^14
>10^14
>10^14
>10^14