硝酸盐热分解法制备四硼酸铝钇微米粉体  

Synthesis of Yttrium Aluminum Borate Micron Powder Using Pyrogenic Decomposition of Nitrate

作　　者：李桂芳[1] 曹全喜[1] 黄云霞[1] 

机构地区：[1]西安电子科技大学技术物理学院,陕西西安710071

出　　处：《中国稀土学报》2008年第2期205-208,共4页Journal of the Chinese Society of Rare Earths

摘　　要：以Al(NO3)3.9H2O,Y(NO3)3.6H2O和B2O3为原料,采用硝酸盐热分解法合成YAl3(BO3)4(YAB)微米粉体,分析了原料的配比及反应温度等影响材料合成的主要参数。分别采用DTA-TG,XRD和SEM等手段分析了不同温度下焙烧所得粉体的物相、形貌以及前驱体热分解特性。结果表明,当B2O3的用量为化学计量比的120%时,在1100℃保温3 h可以合成纯的YAB微米粉体。在该反应过程中,首先形成中间相Al4B2O9,YBO3和Y3Al5O12,而最终形成单一的YAB相。合成的晶粒尺寸比较均匀,平均粒径为120 nm。YAl3（BO3）4 （YAB） powder was synthesized by thermal decomposition method using Al （NO3）3 · 9H2O, Y （NO3） 3· 6H2O and B2O3 as starting materials. The influences of main parameters, including molar ratio and reactive temperature were taken into account. The synthesis process was investigated by DTATG analysis, and as-prepared powders were characterized by XRD and SEM. The optimum processing con-ditions were discussed. The results showed that the pure YAB nanometer powder was synthesized by using 120% B2O3 at 1100 ℃ for 3 h, and the intermediate phase, Al4B2O9, YBO3 and Y3Al5O12, were generated in the beginning, and finally single-phase YAB was produced. The powder consisted of relatively homogeneous particles and the particle size was 120 nm.

关 键 词：YAl3(BO3)4 硝酸盐热分解法 微米粉体 稀土 

分 类 号：TQ174.4[化学工程—陶瓷工业]