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Nishimura have developed new ceramic material which has almost zero thermal expansion in room temperature.
Compare with other type of low thermal expansion ceramics, N-600 has outstanding performance as shown below.
Features
Zero thermal expansion in room temperature(22-23℃)
Light weight and high strength
Mirror polishing available
Zero water absorption
Low thermal conductivity
Applications examples
Semiconductor manufacturing device
Parts for inspection device
Standard gauge for proofreading
Parts for machine used in extreme temperature
Alternative of Super Inver
Properties
| Material name | Cordierite |
| Nishimura No. | N-600 |
| Main components | 2MgO・2Al2O3・5SiO2 |
| Color | White | ||
| Bulk density | cm³/g | 2.5 | |
| Water absorption | % | 0% | |
| Mechanical properties | Vickers hardness | GPa | 9.0 |
| Bending strength | MPa | 150 | |
| Young modules | GPa | 140 | |
| Electric properties | Volume resistivity | Ω・cm | 1014 |
| Electric constant 1MHz | 4.9 | ||
| Electric loss tangent 1MHz | 9.0×10-4 | ||
| Dielectric strength | kV/mm | 19.1 | |
| Thermal properties | Thermal expansion coefficient | 10-6/℃ | 1.28（500～600℃） |
| 0.1 (22~23℃) | |||
| Thermal conductivity | W/m・K | 4.75（30℃） | |