Maximum operating temperature gets most of the attention in ceramic material selection, but thermal shock resistance is often the more practical constraint.
What Causes Thermal Shock Failure
Rapid temperature changes create internal stress from uneven expansion across a ceramic component, leading to cracking even well below the material's maximum temperature rating.
Material Differences
Cordierite and certain zirconia formulations offer notably better thermal shock resistance than standard alumina, making them preferable for processes with frequent rapid heating and cooling cycles.
Practical Implications
If your process involves frequent rapid cycling rather than sustained steady-state operation, prioritize thermal shock resistance in material selection — even if it means trading off some maximum temperature headroom.
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