| Project |
Test the condition |
Unit |
99 porcelain |
95 porcelain |
Talc porcelain |
| Backbone |
|
|
99%AL2O3 |
95%AL2O3 |
MgO.SiO2 |
| Physical property |
| Density of volume |
Normal atmospheric
temperature |
g/cm3 |
≥3.80 |
≥3.60 |
≥2.80 |
| Airtight |
Normal atmospheric
temperature |
|
Pass |
Pass |
— |
| Absorbing water rate |
Normal atmospheric
temperature |
% |
0 |
0 |
0 |
| Mechanical performance |
Rockwell hardness |
Normal atmospheric temperature |
HRA |
>90 |
>86 |
>76 |
| Resist the intensity of turning
back |
Normal atmospheric temperature |
Mpa |
350 |
320 |
150 |
| Compression strength |
Normal atmospheric temperature |
Mpa |
1800 |
1300 |
900 |
|
Hot performance |
| Heat resistant shaking |
200°C-1100°C |
10次 |
Pass |
Pass |
Pass |
| Hot coefficient of expansion |
25°C-800°C |
×10-6mm/°C |
6.5-8.5 |
6.5-8.0 |
5.0-6.2 |
| Heat-conduction rate |
25°C |
W/m.k |
29 |
25 |
2.90 |
| 300°C |
W/m.k |
18 |
13 |
2.00 |
| Dielectric constant |
The medium loosing |
1MHz2O°C |
×10-4 |
≤3.5 |
≤4 |
≤8.0 |
| The angle tangent is worth |
1MHz8O°C |
×10-4 |
≤3.5 |
≤4.2 |
— |
| Dielectric strength |
Normal atmospheric temperature |
KV/mm |
15 |
16 |
20 |
| Dielectric constant |
1MHz2O°C |
|
9-10.5 |
9-10 |
≤7.5 |
| Receptivity of volume |
2O°C |
Ω.cm |
>1014 |
>1014 |
>1012 |
| 30O°C |
Ω.cm |
>1012 |
3.1×109 |
1010 |
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