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Average  thermal expansion coefficient  (¡Á10-6)£º               
Cordierite 1~2£» Graphite 1.4£»Zircon4.2£»Mullite5.5~5.8        £»Corundum8.0~
8.5£»Spinel8.0~8.9£»Silica11.5~13£»Periclasite13.5¡£

The lower thermal expansion coefficient is, the better thermal shock resistance will the ceramics show. So, an order list can be given according their T.S.R. as follows:

   Cordierite > Graphite > Zircon > Mullite > Corundum > Spinel > Silica> Periclasite
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