Synthesis, Characterization, and Sintering of Yttrium Aluminum Garnet Powder Through Double Hydrolysis Approach

Xianxue Li,
Tareque Odoom-Wubah,
Zhangxu Chen,
Bingyun Zheng,
Jiale Huang

Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2015, #07/08


A double hydrolysis approach is first adopted to prepare yttrium aluminum garnet (YAG) powders using Y(NO3)3•6H2O and NaAlO2 as raw materials. A variety of techniques, such as thermogravimetry/differential scanning calorimetry (TG/DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) are employed to characterize the as-synthesized samples. The results show that pure-phase YAG powders are accurately available at 900 ºC and above. Among these, the YAG powders, produced at 1100 ºC, are elliptic in shape, with an average particle size of ~44 nm. Pellets of pressed YAG powders are sintered in vacuum at 1700 °C for 8 h, resulting in a dense and nearly pore-free microstructure with an average grain size of ~7 μm.