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本文测量了ＹＡＧ粉体的ξ电位，通过调节ｐＨ值获得均匀分散的ＹＡＧ水悬浮液．采用非均相沉淀方法获得ＹＡＧ分布均匀的Ａｌ２Ｏ３－ＹＡＧ复合粉体．通过热压烧结得到致密烧结体，ＹＡＧ的加入对烧结温度的影响不大．Ａｌ２Ｏ３－５ｖｏｌ％ＹＡＧ复相陶瓷的抗弯强度为４８５ＭＰａ,断裂韧性为４．２ＭＰａ·ｍ１／２，均高于单相Ａｌ２Ｏ３陶瓷，数据的重复性好于球磨混合所制备的样品．通过ＴＥＭ观察，ＹＡＧ颗粒均匀分布于整个样品中，表明通过非均相沉淀制粉可以获得ＹＡＧ颗粒分布均匀的Ａｌ２Ｏ３－ＹＡＧ复相陶瓷．
In this paper, the zeta potential of YAG powder was measured and the YAG aqueous suspension was uniformly dispersed by adjusting the pH value. Al 2 O 3 -YAG composite powders with uniform YAG distribution were obtained by heterogeneous precipitation method. The compact sintered body was obtained by hot pressing, and the addition of YAG had little effect on the sintering temperature. The flexural strength of Al2O3-5vol% YAG multiphase ceramic is 485MPa, fracture toughness is 4.2MPa · m1 / 2, which is higher than that of single-phase Al2O3 ceramics. The data repeatability is better than the sample prepared by ball milling. Through the TEM observation, the YAG particles are evenly distributed throughout the sample, indicating that Al2O3-YAG composite ceramics with uniform YAG particle distribution can be obtained by heterogeneous precipitation milling.