无机材料学报

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添加Y-Li-Ca系统的AlN陶瓷的低温烧结

徐笑雷; 李文兰; 庄汉锐; 徐素英; 李敏中   

  1. 中国科学院上海硅酸盐研究所; 上海 200050
  • 收稿日期:1998-03-09 修回日期:1998-05-12 出版日期:1999-02-20 网络出版日期:1999-02-20

Low-Temperature Sintering of Y-Li-Ca-Doped AlN Ceramics

Xu Xiao-Lei; LI Wen-Lan; ZHUANG Han-Rui; Xu Su-Ying; Li Min-Zhong   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences Shanghai 200050 China
  • Received:1998-03-09 Revised:1998-05-12 Published:1999-02-20 Online:1999-02-20

摘要: 本文探索了以自蔓延高温(SHS)法合成并经抗水化处理的AlN粉为原料,添加YLiO2-CaF2/YLiO2-CaCO3的AlN陶瓷的低温烧结.研究表明,YLiO2-CaF2/YLiO2-CaCO3是有效的低温烧结助剂,添加5wt%YLiO2和0.5wt%CaF2。,在1675℃下保温6h可得到密度为3.29g/cm3、热导率为97w/m.K的中等性能的AlN陶瓷.同时对YLiO2-CaF2、YLiO2-CaCO3两种添加剂系统进行了对比研究.结果表明,在同样的烧结条件下,前者对AlN陶瓷的低温烧结更为有利.

关键词: AlN陶瓷, 低温烧结, 热导率, YLiO2-CaF2

Abstract: The paper studied low-temperature sintering of Y-Li-Ca-Doped anti-hydrolysis AlN powders synthesized by SHS method. It is found that
Y-Li-Ca additive systems are beneficial for low-temperature sintering of AlN ceramics. AlN samples with density of 3.29g/cm3 and thermal
conductivity of 97 W/m·K were obtained after sintering at 1675℃ for 6 h with the additions of 5wt% YLiO2 and 0.5wt% CaF2.
The work also indicates that YLiO2-CaF2 is better for low-temperature sintering of AlN than YLiO2-CaCO3 under the same sintering conditions.

Key words: AlN ceramics, low-temperature sintering, thermal conductivities, YLiO2-CaF2

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