Synthesis of Monodispersed Spherical Yttrium Aluminum Garnet (YAG) Powders by a Homogeneous Precipitation Method
Synthesis of Monodispersed Spherical Yttrium Aluminum Garnet (YAG) Powders by a Homogeneous Precipitation Method
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DOI：
10.1111/jace.12046
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发表时间：
2012-12
影响因子：
3.9
通讯作者：
Xiaojuan Xu;Xudong Sun;Hong Liu;Ji-guang Li;Xiaodong Li;D. Huo;Shaohong Liu
中科院分区：
文献类型：
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作者：
Xiaojuan Xu;Xudong Sun;Hong Liu;Ji-guang Li;Xiaodong Li;D. Huo;Shaohong Liu
以硝酸钇、硝酸铝和硫酸铝铵为原料，尿素为沉淀剂，采用均匀沉淀法合成了单分散的钇铝石榴石（YAG）粉体。硝酸铝与硫酸铝铵的摩尔比对前驱体粉末的形貌和粒径有显著影响。结果表明，当配比为1：1时，可以得到球形前驱体颗粒。在均匀沉淀过程中，铝离子首先沉淀并形成单分散的球形粉末，然后钇离子沉淀到现有球体的表面上。前驱体粉末在1100°C下煅烧5 h，得到了粒径为500 nm的单分散球形YAG颗粒。所制备的单分散球形Nd：YAG粉体具有良好的烧结性能，在1650°C下真空烧结3.5h，可烧结成透明陶瓷。
Monodispersed yttrium aluminum garnet (YAG) powders have been synthesized via homogeneous precipitation method from the mixed solutions of yttrium nitrate, aluminum nitrate, and ammonium aluminum sulfate using urea as the precipitant. The molar ratio of aluminum nitrate to ammonium aluminum sulfate has a significant effect on morphology and particle size of the precursor powders. It was found that spherical precursor particles can be obtained when the ratio is 1:1. During the homogeneous precipitation process, aluminum ions precipitate first and form monodispered spherical powders, and then yttrium ions precipitate onto the surface of the existing spheres. Monodispersed spherical YAG particles with 500 nm in diameter were obtained by calcining the precursor powder at 1100°C for 5 h. The so-prepared monodispersed spherical Nd:YAG powders have good sinterability, and can be sintered into transparent ceramics by vacuum sintering at 1650°C for 3.5 h.