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材料工程  2005 

Al2TiO5-ZrO2复相材料的制备与性能

, PP. 38-41

Keywords: Al2TiO5,ZrO2,直接合成,热膨胀,抗热震

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Abstract:

以α-Al2O3,TiO2,ZrO2为主要原料,以MgO,SiO2,Fe2O3为稳定剂,经1500℃×2h烧结可制得低热膨胀系数的Al2TiO5-ZrO2复相材料.实验发现随试样中ZrO2含量的提高或随ZrO2稳定程度的提高,Al2TiO5-ZrO2材料的RT~1000℃热膨胀系数逐步降低,这与材料复合体热膨胀系数的常规相悖.ATZ5试样的抗弯强度为39.15MPa,吸水率为3.28%,热膨胀系数为4.46×10-6/℃,其抗热震性能优良,可承受的热震温差是PZrO2试样的1.62倍.

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