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无机材料学报

无机材料学报

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微波均相合成YAG纳米粉体及其可烧结性研究

王介强1; 陶文宏1; 高新睿1; 李勇2; 郑少华1   

  1. 1. 济南大学材料学院, 济南 250022; 2. 浙江大学材料与化工学院, 杭州 310027
  • 收稿日期:2004-09-02 修回日期:2004-10-25 出版日期:2005-09-20 网络出版日期:2005-09-20

Synthesis and Sinterability of YAG Nanopowders by Microwave Homogeneous Precipitation

WANG Jie-Qiang1; TAO Wen-Hong1; GAO Xin-Rui1; LI Yong2; ZHENG Shao-Hua1   

  1. 1. Material School of Jinan University; Jinan 250022, China; College of Material Science and Chemical Engineering; Zhejiang University; Hangzhou 310027, China
  • Received:2004-09-02 Revised:2004-10-25 Published:2005-09-20 Online:2005-09-20

PDF (PC)

1450

被引次数

81

摘要： 采用微波辐照尿素法均相合成技术制备了具有良好分散性的纳米级单相YAG粉体,分析了YAG前驱体的化学组成及其物相变化过程,并对YAG粉体的粒度和形貌进行了表征,结果表明在尿素与钇铝离子的摩尔比为15:1的低尿素用量条件下,合成的无定形前驱物经900℃煅烧直接结晶生成YAG单相粉体,在反应体系中添加适量(NH4)2SO4可使YAG粉体的粒度分布和可烧结性明显改善,添加8%的(NH4)2SO4得到的YAG粉体具有良好的可烧结性,在1500℃烧结即可实现致密化.

关键词: 微波均相合成, YAG粉体, 可烧结性, (NH4)2SO4

Abstract: The low-agglomerated single-phase YAG nanopowders were synthesized by the microwave homogeneous precipitation in the presence of urea. The composition and transformations during
calcination of YAG precursor were analyzed by IR, DTA/TG and XRD. The size and morphology of YAG powders were characterized by LD and TEM. Results show
that the amorphous precursor crystallizes directly to single-phase YAG powders upon calcining to 900℃ that was synthesized under [urea]/[metal ions]
molar ratio of 15. The size distribution and sinterability of YAG powders are obviously improved by adding (NH4)2SO4 into the reaction solution.
YAG powders obtained from the precursor with the (NH4)2SO4 content of 8% have good sinterability and can be highly densified at 1500℃.

Key words: microwave homogenous synthesis, YAG powders, sinterability, （NH4）2SO4

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