Synthesis of Cubic Yttrium Aluminum Garnet (YAG) Powders by Co-precipitation and Two-Step Calcinations

YAG powders were synthesized by co-precipitation and two-step moderate calcinations at 600 / 800 degrees C or 600 / 900 degrees C in air, respectively. Two kinds of the synthesized powders both possess pure cubic YAG phases without any secondary phases such as YAH, YAP and YAM, etc.. The former has low agglomeration with nano-sized primary particles and large active energy, and the latter has homogeneously dispersed and well-crystallized particles, with a narrow particle size distribution of 8 - 13 mu m.