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Material Properties-Alumina (Al2O3)
Only the highest quality alumina is employed in the construction of
our products. The alumina content can vary with the particular application
but is normally in the range of 97.6% to 99.5%. High electrical resistivity,
corrosion resistance, good thermal shock resistance, together with a consistency
in its properties and a relatively simple manufacturing route make alumina
the accepted material where high performance, reliability and strength are
crucial.
| Al2O3 |
97.6% |
| Flexural Strength |
300MN/m2 |
| Porosity |
0.00% Water Absorption |
| Colour |
White |
| Hardness |
75 Rockwell 45N |
| Thermal Conductivity (at 20°C) |
24W/mK |
| Maximum Working Temperature |
1650°C |
| Dielectric Strength |
43kV/mm |
| Per °C(x10-6) |
25°C - 200°C
|
6.9 |
|
200°C - 400°C
|
7.8 |
|
400°C - 600°C
|
8.5 |
|
600°C - 800°C
|
8.8 |
|
800°C - 1000°C
|
9.0 |
| Dielectric constant |
10MHz |
9.53 |
9.91 |
10.14 |
|
1000MHz |
9.00 |
- |
- |
|
8500MHz |
9.04 |
9.32 |
9.54 |
| Dissipation Factor |
10MHz |
0.00004 |
0.00016 |
0.00052 |
| (Tanδ) |
1000MHz |
0.00030 |
- |
- |
|
8500MHz |
0.00045 |
0.00040 |
0.00072 |
| Loss Factor |
10MHz |
0.00038 |
0.00158 |
0.00527 |
|
1000MHz |
0.00270 |
- |
- |
|
8500MHz |
0.00407 |
0.00373 |
0.00687 |
| Volume Resistivity |
25°C |
>1014 |
|
|
| Ohm-cm |
300°C |
1.0 x 1012 |
|
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|
600°C |
2.3 x 1010 |
|
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900°C |
5.0 x 108 |
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COMMITTED TO EXCELLENCE
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