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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 6: 1189 - 1192

DOI: https://doi.org/10.3724/SP.J.1077.2009.01189

Research Paper

Effect of Al2O3 Content on Dielectric Properties of Al2O3/LiTaO3 Composite Ceramics

  • ZHANG You-Feng ,
  • ZHOU Yu ,
  • JIA De-Chang ,
  • MENG Qing-Chang
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  • (1.Material Engineering College, Shanghai University of Engineering Science, Shanghai 201620, China; 2. Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, China)

Received date: 2008-12-29

  Revised date: 2009-05-12

  Online published: 2010-04-22

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Abstract

The effect of Al2O3 addition (5vol%, 10vol%, 15vol% and 20 vol%) on the dielectric properties of Al2O3/LiTaO3(ALT) composite ceramics prepared by hot-press sintering were investigated. The results show that the dielectric constant and dielectric loss of ALT composite ceramics decrease with the increasing frequency. Comparing with pure LiTaO3 ceramics, adding 5vol% Al2O3 can increase its dielectric constant and decrease its dielectric loss, while the dielectric constant and dielectric loss of ALT composite ceramics increase consequently with more Al2O3 adding. With Al2O3 contents increasing, the Curie temperature initiately increases and then decreases, reaching the maximum at 5vol% Al2O3. Thus, Al2O3/LiTaO3(ALT) composite ceramics is a good composite system because the addition of the second phase Al2O3 promotes sintering of LiTaO3, and slightly improves its dielectric properties.

Key words： LiTaO3; Al2O3; dielectric property; composite ceramics

Cite this article

ZHANG You-Feng , ZHOU Yu , JIA De-Chang , MENG Qing-Chang . Effect of Al2O3 Content on Dielectric Properties of Al2O3/LiTaO3 Composite Ceramics[J]. Journal of Inorganic Materials, 2009 , 24(6) : 1189 -1192 . DOI: 10.3724/SP.J.1077.2009.01189

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