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近年来,人们利用ZrO_2的马氏体相变增韧机理来降低Al_2O_3瓷的脆性,使抗热震临界温差ΔT由200～220℃提高到了280℃,并在磁流体发电试验研究中被用作高温结构陶瓷。文[2]认为通过热膨胀失配、颗粒弥散、纤维增强、引入第二相降低热膨胀系数等途径也可达到增韧的目的。作者在改性氧化铝的基础上加入石英玻璃,用热压注法成型并烧结成陶瓷试样,研究了氧化铝-莫来石陶瓷的抗热震性能.
In recent years, the use of ZrO 2 martensitic transformation toughening mechanism to reduce the brittleness of Al 2 O 3 ceramics, so that the critical thermal shock resistance ΔT from 200 ~ 220 ℃ raised to 280 ℃, and in the magnetic fluid power generation test study was used as High-temperature structural ceramics. Wen [2] that through the thermal expansion mismatch, particle dispersion, fiber reinforcement, the introduction of the second phase to reduce the thermal expansion coefficient and other means can achieve the purpose of toughening. Based on the modified alumina, the author added quartz glass, molded and sintered into a ceramic sample by hot pressing injection method, and studied the thermal shock resistance of the alumina-mullite ceramic.