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无机材料学报

无机材料学报 ›› 2011, Vol. 26 ›› Issue (1): 102-106.DOI: 10.3724/SP.J.1077.2010.10365 CSTR: 32189.14.SP.J.1077.2010.10365

• 研究快报 • 上一篇    下一篇

水基凝胶注模成型工艺制备0.9Al2O3-0.1TiO2陶瓷的微波介电性能

吴甲民, 吕文中, 梁军, 汪小红   

  1. 华中科技大学电子科学与技术系, 武汉 430074
  • 收稿日期:2010-06-09 修回日期:2010-07-26 出版日期:2011-01-20 网络出版日期:2010-12-23
  • 作者简介:WU Jia-Min (1984-), male, PhD candidate. E-mail: warmboy_1984@163.com
  • 基金资助:

    Foundationitem: Program for New Century ExcellentTalents in University (NCET-07-0329)

Microwave Dielectric Properties of 0.9Al2O3-0.1TiO2Ceramics Prepared by Aqueous Gelcasting

WU Jia-Min, LÜ Wen-Zhong, LIANG Jun, WANG Xiao-Hong   

  1. Department of Electronic Science and Technology,Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2010-06-09 Revised:2010-07-26 Published:2011-01-20 Online:2010-12-23
  • Supported by:

    Foundationitem: Program for New Century ExcellentTalents in University (NCET-07-0329)

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被引次数

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摘要： 采用水基凝胶注模成型工艺制备了0.9Al2O3-0.1TiO2陶瓷. 研究了烧结后的0.9Al2O3-0.1TiO2陶瓷的微结构、相组成以及微波介电性能. 通过采用合适的预烧温度(1200℃)和连续、缓慢的降温工艺来退火, 成功消除了Al2TiO5第二相. 和传统干压法相比, 用水基凝胶注模成型工艺制备的0.9Al2O3-0.1TiO2陶瓷具有较大的晶粒, 较少的气孔和更加均匀的微结构. 因此, 用水基凝胶注模成型工艺制备的0.9Al2O3-0.1TiO2陶瓷拥有更好的微波介电性能: er = 10.71, Q x f =20421GHz, tf = 1.3´10-6/℃，而用传统干压法制备的0.9Al2O3-0.1TiO2陶瓷的微波介电性能为er =10.89, Q x f =11938GHz, tf = 1.4 x 10-6/℃.

关键词: 陶瓷, 介电性能, 微结构, 0.9Al2O3-0.1TiO2, 水基凝胶注模成型工艺

Abstract: Theaqueous gelcasting was used to prepare 0.9Al2O3-0.1TiO2ceramics. The microstructures, phase compositions and microwave dielectricproperties of sintered 0.9Al2O3-0.1TiO2ceramics were investigated. With the help of proper calcination temperature(1200℃)and continuous and slow cooling process as annealing treatment, the Al2TiO5secondary phase was successfully eliminated. Compared with conventional drypressing method, bigger grains, less pores and more uniform microstructures areobserved in the 0.9Al2O3-0.1TiO2 ceramicsprepared by aqueous gelcasting. Therefore, much better microwave dielectricproperties are obtained in the ceramics prepared by aqueous gelcasting with er = 10.71, Q x  f = 20421GHz, tf = 1.3 x 10-6/℃, whereas that of ceramics preparedby dry pressing are er = 10.89, Q x f = 11938GHz, tf = 1.4 x 10-6/℃.

Key words: ceramics, dielectricproperties, microstructures, 0.9Al2O3-0.1TiO2, aqueousgelcasting