共沉淀法制备YAG-Al2O3纳米复合粉体

本文采用共沉淀法制备了ＹＡＧ－Ａｌ_２Ｏ_３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－Ａｌ_２Ｏ_３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－Ａｌ_２Ｏ_３纳米复合粉体具有成本低、产量高和工艺简单的优点．

Synthesis of YAG-Al2O3 Nanocomposite Powders by Co-Precipitation Methods

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.