本文采用共沉淀法制备了ＹＡＧ－Ａｌ２Ｏ３纳米复合粉体．并通过ＸＲＤ、ＴＥＭ详细研究了粉体组成、形貌随煅烧温度的变化．研究表明，在１３００℃下煅烧可获得ＹＡＧ粒径约１００ｎｍ、分散均匀、无杂相的ＹＡＧ－Ａｌ２Ｏ３纳米复合粉体．粉体在１４５０℃可热压烧结致密，远低于文献报道的热压烧结温度１６００℃．用共沉淀法制备ＹＡＧ－Ａｌ２Ｏ３纳米复合粉体具有成本低、产量高和工艺简单的优点．
YAG-Al2O3 nanocomposite powders were prepared by the co-precipitation process. The crystallize temperature and morphology of the composite powder
was intensively studied with XRD and TEM. The results indicate that above 1300℃, there is only YAG and α-Al2O3 phases existed.
YAG particles with an average size of 100 nm can be observed uniformly dispersed in α-Al2O3. Using prepared powders, nearly fully dense sintering
body can be fabricated by hot-pressing at 1450℃. The sintering temperature is far lower than 1600℃ reported by other researchers. The preparation
of YAG-Al2O3 nanocomposite powders based on the co-precipitation method has promising application with merits of low cost, high production and simple processing.
参考文献
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