Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第15卷    第8期    总第77期    2005年8月

[PDF全文下载]    [Flash在线阅读]    

    

文章编号:1004-0609(2005)08-1272-06
湿化学法合成YAG纳米粉体及透明陶瓷
闻 雷1, 孙旭东2, 其 鲁1, 马伟民3

( 1. 北京大学 化学与分子工程学院, 北京 100871;
2. 东北大学 材料与冶金学院, 沈阳 110004;
3. 沈阳大学 机械工程学院, 沈阳 110041
)

摘 要:  分别以AlCl3和YCl3的混合溶液为母盐, 碳酸氢铵(AHC)或氨水(AW)为沉淀剂, 采用共沉淀法制备了YAG超微粉。 AHC法得到的沉淀物经900 ℃煅烧2 h后, 全部转变为YAG相, 没有YAM和YAP等中间相生成。 1 100 ℃煅烧2 h后获得的YAG粉体分散性好, 一次颗粒尺寸为80 nm, 具有良好的烧结活性, 使用0.5%(质量分数)的正硅酸乙酯(TEOS)作为烧结添加剂,经过1 700 ℃真空烧结5 h后, 获得了YAG半透明陶瓷。 AW法煅烧过程中出现了YAP相, 得到的粉体团聚严重, 烧结体密度很低。

 

关键词:  YAG; 透明陶瓷; 纳米粉; 湿化学法

Nanocrystalline YAG powders and translucent ceramics by wet-chemical method
WEN Lei1, SUN Xu-dong2, QI Lu1, MA Wei-min3

1. College of Chemistry and Molecular Engineering,
Peking University, Beijing 100871, China;
2. School of Materials and Metallurgy,
Northeastern University, Shenyang 110004,China;
3. School of Mechanical Engeering, Shenyang University,
Shenyang 110004,China

Abstract: By using the mixture of aluminum and yttrium chloride and ammonium hydrogen carbonate (AHC) or ammonia water (AW) as the reagent and precipitants, respectively, the nanocrystalline yttrium aluminum garnet(YAG) powder was synthesized by the co-precipitation method. The precursor obtained through the AHC method completely was transformed to YAG phase after calcining at 900 ℃ for 2 h, and no intermediate YAM or YAP phase was detected during calcining. YAG powders obtained by calcining the carbonate precursor at 1 100 ℃ are well dispersed, the primary particle diameter is about 80 nm and the YAG powders have high sinterability. Translucent YAG ceramics were fabricated after vacuum sintering at 1 700 ℃ for 5 h using 0.5% tetraethyl orthosilicate(TEOS) as sintering aid addition. YAP phase is formed during calcing the hydroxide precursor by AW method. The resultant YAG powders are severely agglomerated and caused low density of the sintered body.

 

Key words: YAG; translucent ceramic; nanocrystalline powder; wet-chemical method

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com