After our long experience in machining extra-hard material we can offer custom-made products in little or large series. There are many types of fine ceramics meeting almost every requirement:
- steatite: high electrical insulating performances with low mechanical resistance,
- alumina: very hard, high corrosion resistance, good mechanical characteristics,
- zirconia: high resilience, good corrosion resistance,
- silicon nitride: high resistance to thermal shock, good mechanical and corrosion resistance.
All of them have a good resistance to high temperature. The technical data of three types are in the table, many other types can be supplied for specific applications.
| Ceramics technical data |
| |
Alumina |
Zirconia |
| |
97.5% |
99.5% |
|
| Density (g/cm3) |
3.78 |
3.90 |
5.95 |
| Flex. strength (MPa) |
320 |
350 |
850 |
| Compress. strength (MPa) |
2200 |
2900 |
2200 |
| Young modulus |
310 |
370 |
200 |
| Vickers hardness (500 p) |
1600 |
1800 |
1200 |
| Thermal expansion (10-6K-2) |
7.4 |
7.5 |
9.8 |
| Thermal conductivity (W/m-K) |
23 |
31 |
2.2 |
| Resistivity (ohm-cm) |
1014 |
1014 |
109 |
| Resistivity (ohm-cm) |
108 |
108 |
102 |
| Max operating temp. (C) |
1500 |
1650 |
1000 |
