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Technical Parameters
| Operating Limits |
Units |
Alumina Ceramics |
Alumina Ceramics |
| Alumina Content |
wt% |
≥ 99 |
≥ 95 |
| Volume Density |
g /cm3 |
3.85 |
3.7 |
| Hardness (HRA) |
HRA ≥ |
88 |
86 |
| Compressive Strength |
MPa ≥ |
400 |
300 |
| Maximum Temperature |
℃ |
1500 |
1500 |
| Air Tight Test |
|
Pass |
Pass |
| Thermal Shock Test |
|
Pass |
Pass |
| Coefficient Of Heat Expansion |
×10-6/℃ |
8.2 |
7.5 |
| Dielectric Constant |
εr20℃, 1MHz |
9.2 |
9 |
| Dielectric Loss |
tanδ×10-4, 1MHz |
2 |
3 |
| Volume Resistivity |
Ω·cm 20℃ |
1014 |
1013 |
| Puncture Strength |
KV/mm , DC≥ |
20 |
20 |
| Acid-resistance |
mg/cm2 ≤ |
0.7 |
7 |
| Alkali-resistant |
mg/cm2 ≤ |
0.1 |
0.2 |
| Abrasion Resistance |
g/cm2 ≤ |
0.1 |
0.2 |
| Compressive Strength |
M Pa ≥ |
2800 |
2500 |
| Flexural Strength |
M Pa ≥ |
350 |
200 |
| Elastic Modulus |
G Pa |
350 |
300 |
| Poisson’s Ratio |
|
0.22 |
0.2 |
| Thermal Conductivity |
W/m·K( 20℃) |
25 |
20 |
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