Alumina
|
Property |
ASTM
Method |
Designation |
Dense
AL-95 |
Dense
AL-96 |
Dense
AL-98 |
Dense
AL99.5 |
Dense
AL99.8 |
|
| % Alumina |
- |
% Al2O3 |
94.8 |
96.0 |
97.6 |
99.5 |
99.6 |
|
|
|
|
|
|
|
|
|
Color |
- |
|
Cream |
White |
White |
Cream - White |
Cream |
|
Gas/Liquid Permeability |
F134B |
Atm-cc/sec |
None |
None |
None |
None |
None |
|
|
|
|
|
|
|
|
|
Density |
C 20-97 |
g/cc |
3.65 |
3.68 |
3.83 |
3.90 |
3.91 |
| Hardness |
- |
Mohs Scale |
9 |
9 |
9 |
9 |
9 |
| Water Absorption |
C 20-97 |
% |
0 |
0 |
0 |
0 |
0 |
| Flexural Strength |
F417-87 |
PSI |
45,000 |
48,000 |
60,000 |
55,000 |
50,000 |
| Tensile Strength |
- |
PSI |
20,000 |
19,000 |
22,000 |
25,000 |
25,000 |
|
Compressive Strength |
- |
PSI |
300,000 |
330,000 |
350,000 |
375,000 |
375,000 |
|
Elastic Modulus |
C848 |
PSI x106 |
44 |
45 |
51 |
54 |
54 |
|
Shear Modulus |
C848 |
PSI x106 |
17 |
18 |
20 |
21 |
21 |
|
|
|
|
|
|
|
|
| Linear Coefficient of
Thermal Expansion:
|
C372-96
-
-
|
(@25°C-100°C) x10-6/°C |
5.0 |
6.0 |
6.2 |
7.3 |
6.6 |
| (@25°C-300°C) x10-6/°C |
6.6 |
6.8 |
6.7 |
6.4 |
6.9 |
| (@25°C-600°C) x10-6/°C |
7.6 |
7.7 |
7.5 |
7.2 |
7.6 |
| Thermal Conductivity 25°C |
C 408 |
W/m-K |
22 |
23 |
27 |
31 |
30 |
| Maximum Use Temperature (Non Loading) |
- |
°C |
1650 |
1700 |
1700 |
1675 |
1675 |
| - |
°F |
3000 |
3100 |
3100 |
3050 |
3050 |
|
|
|
|
|
|
|
| Dielectric Strength (1/8" thick) |
D149-97A |
V/mil |
250 |
260 |
270 |
270 |
245 |
Dielectric Constant
@ 1MHz |
D150-98 |
At 25°C |
9.2 |
9.2 |
9.5 |
9.8 |
10.1 |
| Dielectric Constant (@GHz) |
D2520-95 |
At 25°C |
9.0 (@10.6) |
8.8 (@10.4) |
9.7 (@7.0) |
9.7 (@9.9) |
10.0 (@7.3) |
| Dielectric Loss @ 1MHz |
D150-98 |
At 25°C |
0.0003 |
0.0005 |
0.0004 |
0.0001 |
0.023 |
| Dielectric Loss (@GHz) |
D2520-95 |
At 25°C |
0.0008 (@10.6) |
0.0007 (@10.4) |
0.0005 (@7.0) |
0.0001 (@9.9) |
0.003 (@7.3) |
| Volume Resistivity (ohm-cm) |
D 257 |
At 25°C |
>1.0E + 15 |
>1.0E + 15 |
>1.0E + 15 |
>1.0E + 15 |
>1.0E + 15 |
| - |
At 300°C |
1.3E + 14 |
2.3E + 14 |
2.0E + 14 |
4.0E + 13 |
7.9E + 12 |
| - |
At 700°C |
2.5E + 09 |
7.1E + 09 |
8.1E + 09 |
5.1E + 09 |
7.7E + 09 |
|
NOTE: THE INFORMATION IN THIS DATA SHEET IS FOR DESIGN GUIDANCE ONLY. STC DOES NOT WARRANTY THIS DATA AS ABSOLUTE VALUES. FORMING METHODS AND SPECIFIC GEOMETRY COULD AFFECT PROPERTIES. SLIGHT ADJUSTMENTS CAN BE MADE TO SOME OF THE PROPERTIES TO ACCOMMODATE SPECIFIC CUSTOMER REQUIREMENTS. MOST OF THE DENSE MATERIALS IN THE TABLE ARE RESISTANT TO MECHANICAL EROSION AND CHEMICAL ATTACK. STC HAS PERFORMED TESTING IN ACCORDANCE WITH ASTM D2442 FOR CERTAIN COMPOSITIONS. PLEASE CONTACT OUR TECHNICAL STAFF FOR APPROPRIATE MATERIAL AND SPECIFIC TEST RESULTS. |
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Alumina
Zirconia