Synthesis of YAG-Al_2O_3 Nanocomposite Powders by Co-Precipitation Methods

YAG-Al_2O_3 nanocomposite powders were prepared by the co-precipitation process.The crystallize temperature and morphology of the composite powder was intensively studiedwith XRD and TEM. The results indicate that above 1300℃, there is only YAG and α-Al_2O_3phases existed. YAG particles with an average size of 100 nm can be observed uniformly dispersedin α-Al_2O_3. Using prepared powders, nearly fully dense sintering body can be fabricated byhot-pressing at 1450℃. The sintering temperature is far lower than 1600℃ reported by otherresearchers. The preparation of YAG-Al_2O_3 nanocomposite powders based on the co-precipitationmethod has promising application with merits of low cost, high production and simple processing.