Alumina 960 machinable ceramic
Final Advanced Materials provides Al2O3 machinable ceramics. Cotronics® machinable Alumina is available in boards and rods, we can machine according to your drawings.
Cotronics® Rescor® 960 is a 96% Alumina machinable ceramic that is usable to 1650°C. It is manufactured from high purity alumina by a unique process.
Machining can be accomplished with conventional tooling on standard shop equipment. No heat treatment is required. Rescor® 960 machinable Alumina can be used continuously to temperatures of 1650°C and offers the convenience and economy of an in house capability for Alumina parts. The chemical, thermal and electrical properties of Rescor® 960 is equivalent to standard high alumina ceramics.
Alumina 960 applications
- Electrical and electronic industries
- Metallurgical
- Fixtures and vacuum industries
Technical data
|
Properties |
Units |
Machinable alumina 960 |
Machinable boron nitride |
Aluminium nitride (Shapal M™) |
Machinable Aluminium nitride |
|
Physical characteristics |
|||||
|
Density |
g/cm3 |
3.8 |
1.85 |
2.9 |
2.9 |
|
Porosity |
% |
10 |
14 |
0 |
<0.1 |
|
Water uptake |
% |
2-3.5 |
/ |
0 |
0 |
|
Mechanical characteristics |
|||||
|
Hardness |
Mohs: 5 |
Knopp : 4 kg/mm² |
Vickers : 3900 kg/mm² |
Vickers : 3750 kg/mm² |
|
|
Compressive Strength |
MPa |
422 |
20 |
1200 |
1170 |
|
Flexural Strength |
MPa |
267 |
50 |
300 |
300 |
|
Modulus of Elasticity |
GPa |
/ |
/ |
190 |
180 |
|
Thermal characteristics |
|||||
|
Peak Temperature |
°C |
1650 |
850 (1150 inerte) |
1000 (1900 inerte) |
1000 (1900 sous vide) |
|
Continuous Temperature |
°C |
1650 |
850 (1150 inerte) |
1000 (1900 inerte) |
1000 (1900 sous vide) |
|
Specific Heat at 20°C |
J/kg.°K |
- |
810 |
- |
- |
|
Thermal Conductivity at 100°C |
W/m°K |
- |
90 |
90 |
90 |
|
Coefficient of Expansion |
10-6 /°K |
||||
|
20 - 40 °C |
- |
- |
4.4 |
- |
|
|
20 - 600 °C |
- |
- |
4.8 |
4.5 |
|
|
20 - 800 °C |
- |
- |
5.1 |
- |
|
|
20 - 1000 °C |
0.57 |
- |
- |
- |
|
|
Electrical characteristics |
|||||
|
Specific Resistivity at 20°C |
Ohm.cm |
1014 |
1014 |
1012 |
1012 |
|
Dielectric at 20°C |
|
9 (à 100kHz) |
4 |
7.1 |
7.1 |
|
Loss Tangent |
0.0012 |
0.001 |
- |
||
|
Dielectric Strength at 20°C |
kV/mm |
7.87 |
2 |
40 |
40 |
|
Chemical characteristics |
|||||
|
Corrosion resistance at 20°C |
|
G |
- |
- |
- |
|
Resistance to alkalis et 20°C |
G |
- |
- |
- |
|