化学共沉淀法制备纯相YAG纳米粉体的研究

Study on Fabrication of Pure Yttrium Aluminum Garnet Nano-powder by Chemical Coprecipitation Method

通过调整反应溶液中铝离子的浓度,以硝酸铝和硝酸钇为原料,碳酸氢铵为沉淀剂,采用化学共沉淀法制备了纯YAG相纳米粉体。使用X射线衍射仪,扫描电镜,红外光谱仪,热分析仪等测试手段对YAG前驱体及煅烧后的粉体进行表征。结果表明:略微增加反应溶液中铝离子的浓度,即当Y3+∶Al3+浓度为9∶16时,沉淀反应形成的前驱体经过1200℃煅烧3 h后可形成不含杂相的纯立方相YAG纳米粉体,所得粉体分散性较好,形状为棒状,平均颗粒尺寸约为150 nm。

By adjusting the aluminum ion concentration of reaction solution, using yttrium nitrate and aluminum nitrate as raw materials, ammonium bicarbonate as precipitant, YAG nanopowder were prepared by chemical coprecipitation method. The precursor and calcined nanopowders were characterized by infrared spectrometer, thermal analyzer, X-ray diffraction, scanning electron microscopy. The results show that the increases slightly aluminum ion concentration of reaction solution increases slightly, when the concentration ratio of Y^3＋ and Al^3＋ is 9： 16, fully pure cubic phase YAG nanopowder were obtained by calcination the precursor at 1200 ℃ for 3 h, the obtained powder is well dispersibility, approximate spherical shape, and the average particle size is about 150 nm.