Li2O对SPS烧结AlN陶瓷致密化、显微结构和导热性的影响

doi:10.3724/SP.J.1077.2011.00659

无机材料学报 ›› 2011, Vol. 26 ›› Issue (6): 659-663.DOI: 10.3724/SP.J.1077.2011.00659 CSTR: 32189.14.SP.J.1077.2011.00659

Li₂O对SPS烧结AlN陶瓷致密化、显微结构和导热性的影响

李美娟^1,2, 沈强², 罗国强², 张联盟²

(武汉理工大学1. 理学院, 2. 材料复合新技术国家重点实验室, 武汉 430070)

收稿日期:2010-08-18 修回日期:2010-09-30 出版日期:2011-06-20 网络出版日期:2011-06-07
作者简介:李美娟(1969-), 女, 博士, 副教授. E-mail: meijuanli@whut.edu.cn
基金资助:
国家自然科学基金(50972111); 武汉理工大学博士科研启动基金(471-38650199)

Effects of Li2O on Densification, Microstructure and Thermal Property of Spark Plasma Sintered AlN Ceramics

LI Mei-Juan^1,2, SHEN Qiang², LUO Guo-Qiang², ZHANG Lian-Meng²

(1. School of Science, Wuhan University of Technology, Wuhan 430070, China; 2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China)

Received:2010-08-18 Revised:2010-09-30 Published:2011-06-20 Online:2011-06-07
Supported by:
National Natural Science Foundation of China (50972111); Doctoral Research Fund of Wuhan University of Technology (471-38650199)

摘要/Abstract

摘要： 研究了低温烧结助剂Li₂O对SPS烧结AlN陶瓷烧结致密化过程、烧结体显微结构和导热性的影响. 研究表明: 在SPS烧结过程中, 烧结助剂Li₂O和Sm₂O₃(或Y₂O₃)的加入使AlN试样开始收缩并进入烧结初期阶段的温度从1550℃左右下降到1200℃以下; 同时Li₂O使AlN试样的烧结温度显著降低, 完全致密化温度降低到1650℃左右. 烧结体的显微结构表明: Li₂O的加入有助于形成润湿性良好的液相, 促进AlN陶瓷的液相烧结; 但不利于快速烧结坯体中气体的扩散与逸出, 使试样的致密度受到影响. 同时, Li₂O影响AlN晶粒的发育, 使液相润湿性提高, 晶界相均匀分布, 增加了晶粒界面上的声子散射, 对AlN材料的热导率产生不利影响. 同时, 添加1.0wt% Li₂O和1.5wt% Sm₂O₃的AlN试样的热导率低于仅添加1.5wt% Sm₂O₃的试样.

关键词: 烧结助剂, AlN陶瓷, SPS烧结, 显微结构

Abstract: A newly developed rapid densify technique, spark plasma sintering (SPS), is used to prepare full-densified aluminum nitride (AlN) ceramics which are poorly sinterable. Some sintering aids are also used to promote the AlN ceramics’ densification and improve its thermal conductivity. In this work, effects of sintering aid Li₂O on densification, microstructure and thermal property of SPS sintered AlN ceramics were investigated. Results suggest that the initial sintering temperature of AlN samples reduce from 1550℃ to lower than 1200℃ with 1.0wt% Li₂O and 1.5wt% Sm₂O₃ (or Y₂O₃) adding as sintering aids . With Li₂O addition, AlN compacts can be fully densified at 1650℃. The microstructure of AlN compacts indicates that Li₂O is beneficial to generate aluminate liquid phase with better wettability and promote the densification of AlN ceramics, but it is unable to obtain higher relative density of AlN compacts because the escapement of gas phase though out liquid phase is very difficult in a rapid sintering process. Meanwhile, Li₂O addition affects the growth of AlN grains, and the better wettability of aluminate with AlN grain induces the homogeneous distribution of grain boundary phase. The deterioration of thermal conductivity of AlN ceramics is caused by the fact that the scattering of phonon is enhanced by small grain size and the secondary phase spreading adequately along the AlN grain boundaries. The thermal conductivity of AlN samples with 1.0wt% Li₂O and 1.5wt%Sm₂O₃ as sintering aids is lower than that of sample only with Sm₂O₃ as sintering aids.

Key words: sintering aids, aluminum nitride ceramic, spark plasma sintering, microstructure

中图分类号:

TQ174

李美娟, 沈强, 罗国强, 张联盟. Li₂O对SPS烧结AlN陶瓷致密化、显微结构和导热性的影响[J]. 无机材料学报, 2011, 26(6): 659-663.

LI Mei-Juan, SHEN Qiang, LUO Guo-Qiang, ZHANG Lian-Meng. Effects of Li2O on Densification, Microstructure and Thermal Property of Spark Plasma Sintered AlN Ceramics[J]. Journal of Inorganic Materials, 2011, 26(6): 659-663.

参考文献

[1] Cheng J P, Agrawal D, Zhang Y J, et al. Development of translucent aluminum nitride (AlN) using microwave sintering process. Journal of Electroceramics, 2002, 9(1): 67-71.

[2] Khor K A, Yu L G, Murakoshi Y. Spark plasma sintering of Sm2O3-doped aluminum nitride. Journal of the European Ceramic Society, 2005, 25(7): 1057-1065.

[3] Xiong Y, Fu Z Y, Wang H, et al. Microstructure and IR transmittance of spark plasma sintering translucent AlN ceramics with CaF2 additive. Materials Science and Engineering B, 2005, 123(1): 57-62.

[4] 李小雷, 马红安, 左桂鸿, 等(LI Xiao-Lei, et al). AlN陶瓷的高压烧结研究. 无机材料学报(Journal of Inorganic Materials), 2008, 23(1): 104-109.

[5] Hundere A M, Einarsrud M A. Effects of reduction of the Al-Y-O containing secondary phase during sintering of AlN with YF3 addition. Journal of the European Ceramic Society, 1996, 16(8): 899-906.

[6] Liu Y, Zhou H, Qiao L, et al. Low-temperature sintering of aluminum nitride with YF3-CaF2 binary additive. Journal of Materials Science Letter, 1999, 18(9): 703-704.

[7] Terao R, Tatami J, Meguro T, et al. Fracture behavior of AlN ceramics with rare earth oxides. Journal of the European Ceramic Society, 2002, 22(7): 1051-1059.

[8] Junior A F, Shanafield D J. The use of yttrium (III) isopropoxide to improve thermal conductivity of polycrystalline aluminum nitride (AlN) ceramics. Journal of Materials Science: Materials in Electronic, 2005, 16(3): 139-144.

[9] Watari K, Hwang H J, Toriyama M, et al. Low-temperature sintering and high thermal conductivity of YLiO2-doped AlN ceramics. Journal of the American Ceramic Society, 1996, 79(7): 1979–1981

[10] Watari K, Valecillos M C, Brito M E, et al. Densification and thermal conductivity of AlN doped with Y2O3, CaO, and Li2O. Journal of the American Ceramic Society, 1996, 79(12): 3103-3108.

[11] Qiao L, Zhou H P, Chen K X, et al. Effects of Li2O on the low temperature sintering and thermal conductivity of AlN ceramics. Journal of the European Ceramic Society, 2003, 23(9): 1517-1524.

[12] Li M J, Zhang L M, Shen Q, et al. Microstructure and properties of spark plasma sintered AlN ceramics. Journal of Materials Science, 2006, 41(23): 7934-7938.

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Li₂O对SPS烧结AlN陶瓷致密化、显微结构和导热性的影响

Effects of Li2O on Densification, Microstructure and Thermal Property of Spark Plasma Sintered AlN Ceramics

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