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-Suitable for Precision Molding and Related Processes-
This material won the "Invention Prize" in 1999 and the "Invention Grand Prize" in 2000.
TCM (Transparent Crystallized Materials) have the following outstanding properties.
- Thermal shock resistance: this can withstand a temparature difference of 450 degrees centigrade.
- Low expansion and mechanical strength
- High transparency
TCM are capable of very precise processing. With this material, it is easy to make holes and form concave shapes, and it can be polished to a surface roughness of 2 . High performance in dimensional stability and heat resistance make TCM an ideal choice precise parts and materials.
Because of their high reliability, these materials are also suitable as an alternative to quartz glass.
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| Precision processing with TCM |
Refrectors with TCM |
Crystallized Glass
These materials are produced by thermally processing and crystallizing molded products. Since this precipitated crystal has a minus expansion coefficient, this hybrid materials have a low expansion coefficient.
Of course you may make the hybrid materials with property of the minus coefficient of expansion.
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Properties
| Density(kg/m3) |
2.4×103 |
| Thermal expansion coeff(×10-7/K) |
-1~15 |
| Deformation point(degreeC) |
760 |
| Thermal shock temp.difference(degreeC) |
450 |
| Abraded strength(MPa) |
155 |
| Vickers hardness(HV) |
710 |
| Young's modulus(GPa) |
87 |
| Poisson ratio |
0.26 |
| Thermal conductivity(W/m・K) |
1.53 |
| Specific heat(J/kg・K) |
750 |
| Refractive index(Nd) |
- |
| Water resistance(Na2Omg)* |
0.05 |
| Dielectric constant |
1MHz |
7.7 |
| 100MHz |
7.3 |
| Dielectric loss |
1MHz |
0.013 |
| 100MHz |
0.017 |
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* JIS R-3502 Powder Method
The data shown in this table are based on our measurement of the materials and do not constitute a guarantee that the materials will have these properties.
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OKAMOTO GLASS Co., Ltd.
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