Measures to Improve Thermal Shock Resistance of Al2O3 Ceramics
Measures to Improve Thermal Shock Resistance of Al2O3 Ceramics
1.The second phase method improves the thermal shock resistance of alumina ceramics
In order to improve the thermal shock resistance of Al2O3 ceramics, it is an effective method to introduce an appropriate and appropriate second phase into the Al2O3 ceramic matrix. The introduced second phase can be either a non-metallic material or a metal material. Particles, but also whiskers, fibers or sols.
2. Add low thermal expansion coefficient components
Adding cordierite, mullite, andalusite, aluminum titanate, eucryptite and other components with low thermal expansion coefficient or negative expansion coefficient to Al2O3 ceramics can reduce the thermal expansion coefficient of ceramics, which is beneficial to improve the resistance of ceramics. Thermal shock.
3. Add high thermal conductivity components
Adding SiC, metal particles and other components with high thermal conductivity to Al2O3 ceramics can improve the thermal conductivity of the ceramics, reduce the instantaneous temperature gradient of the ceramics during the quenching process, and thus reduce the thermal shock of the ceramics after the thermal shock cycle. stress, which is beneficial to improve the thermal shock resistance of ceramics.
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