| Property |
Unit |
Temp. |
AL500® |
AL300® |
AL995® |
| AL2O3 Content |
% |
- |
94.0 |
97.6 |
99.5 |
| Flexural Strength |
MPa |
R.T. |
345 |
296 |
310 |
| Compressive Strength |
MPa |
R.T. |
> 2070 |
>1720 |
>2070 |
| Density |
g/cm³ |
R.T. |
3.67 |
3.76 |
3.86 |
| Porosity |
% water absorption |
- |
vacuum tight
0.00 |
vacuum tight
0.00 |
vacuum tight
0.00 |
| Colour |
- |
- |
White |
White |
White/Ivory |
| Hardness |
HR 45N |
- |
78 |
75 |
81 |
| Thermal Conductivity |
W/m K |
R.T. |
20.5 |
26.8 |
29.3 |
| Coefficient of Linear Thermal Expansion |
ppm/K |
25 - 200°C
200 - 400°C
400 - 600°C
600 - 800°C
800 - 1000°C |
6.3
7.5
8.0
8.6
9.1 |
6.9
7.8
8.5
8.8
9.0 |
6.9
7.8
8.3
9.0
9.4 |
| Max. Working Temperature |
°C |
- |
1600 |
1650 |
1725 |
| Dielectric Strength |
D.C. V/mil
D.C. kV/mm |
R.T. |
650
25.6 |
1100
43.3 |
800
31.5 |
| Te Value |
°C |
- |
> 950 |
> 1000 |
> 975 |
| Volume Resistivity |
W
cm |
25°C
300°C
600°C
900°C |
>1014
2.0 · 1012
4.6 · 1008
3.5 · 1006 |
> 1014
1.0 · 1012
2.3 · 1010
5.0 · 1008 |
> 1014
2.0 · 1011
6.0 · 1008
2.5 · 1006 |
| Dielectric Constant (K') |
- |
25°C
300°C
500°C |
10/1000/8500
MHz
9.07/9.04/8.99
9.53/-/9.26
9.91/-/9.40 |
10/1000/8500 MHz
9.53/9.00/9.04
9.91/-/9.32
10.14/-/9.54 |
10/1000/8500 MHz9.58/9.30/9.37
9.92/-/9.61
10.20/-/9.82 |
| Dissipation Factor (tan
d) |
- |
25°C
300°C
500°C |
10/1000/8500 MHz
0.00026/0.00062/0.00078
0.00028/-/0.00155
0.00341/-/0.00155 |
10/1000/8500 MHz
0.00004/0.00030/0.00045
0.00016/-/0.00040
0.00052/-/0.00072 |
10/1000/8500 MHz
0.00003/0.00014/0.00009
0.00009/-/0.00014
0.00040/-/0.00025 |
