Low Thermal Expansion Ceramic Mirrors

PHOTO: Low Thermal Expansion Ceramic Mirrors

High-rigidity enabled, extremely thin, with reduced weight.

- By utilizing dense cordierite with a low thermal expansion coefficient, deformation due to temperature change is suppressed.
- Due to the thin shape enabled by the high rigidity, and the complicated rib structures, weight can be reduced to approximately 1/3 compared with low thermal expansion glasses (based on Kyocera simulation).
- These materials offer excellent machinability yielding higher productivity for complicated shapes as well as shorter production times.


  • High Specific Rigidity
  • Low Thermal Expansion
In addition to providing ceramic components, Kyocera also offers precision polishing and mirror polishing.
  • Product specs
  • Features
  • Applications

Product specs

Material Cordierite
Special process Weight reduction is possible by utilizing rib structures.


Deflection depth compared with low thermal expansion glass

Deflection depth when supported by three points: Low thermal expansion glass vs. Ceramics

Conditions for investigation

- Product size: φ1020 × 120mm (Rib structure)
- Supported position: Three points at the circumference
- Load : Own weight only

* Results are based on the model above.
  Investigated in Kyocera.

Physical properties compared with
low thermal expansion glass

Temperature dependence graph


* All values are typical data from test pieces. The values are not guaranteed values.


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