堇青石材料热膨胀系数低,是优良的高温抗热震材料,但我国目前生产的堇青石材料热膨胀系数还有待进一步提高.综述了降低堇青石材料热膨胀系数的各种途径,包括调整材料的化学矿物组成、优化制备工艺和后期处理等,指出今后发展的方向是利用负膨胀材料开发低膨胀乃至零膨胀的堇青石材料,以期促进优质堇青石材料的研究与开发.
Cordierite is an excellent anti-heat-shock material at high temperature because of its low thermal expansion coefficient. However,there is something to do for decreasing the thermal expansion coefficient. A few methods to decrease the thermal expansion coefficient of cordierite are summarized, including adjusting chemical mineral compositions,optimizing preparation process, and post-processing. Using negative expansion materials to explore cordierite materials with low and even zero expansion coefficients is pointed out as the development direction. These researches will promote the development of low-thermal-expansion-coefficient cordierite materials.
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