Preparation and Characterization of Y3Sc2Ga3O12 Nano-Polycrystalline Powders by Co-Precipitation Method

In order to grow high-quality gallium garnet crystals, polycrystalline materials were used as starting materials. YSGG precursor was synthesized by co-precipitation method using aqueous ammonia as a precipitator, and the precursor was then sintered at different temperatures. The results showed that the feasible pH range was 8.3 ∼ 9.84 in the process of co-precipitation reaction. The YSGG precursor and the powders sintered at different temperatures were characterized by IR, XRD and TEM methods. It was found that the precursor transformed to pure YSGG polycrystalline phase at 800 °C. YSGG nano-polycrystalline powders sintered at 800 ∼ 1000 °C were well dispersed and the sizes of the YSGG grains were about 40 ∼ 100 nm.