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无机材料学报

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Al2O3添加剂对合成MgTiO3陶瓷相组成及介电性能的影响

王康宋; 罗澜; 陈玮; 张干城   

  1. 中国科学院上海硅酸盐研究所 上海 200050
  • 收稿日期:2001-05-09 修回日期:2001-06-04 出版日期:2002-05-20 网络出版日期:2002-05-20

Effects of Al2O3 on the Microwave Dielectric Properties of MgTiO3 Ceramics

WANG Kang-Song; LUO Lan; CHEN Wei; ZHANG Gan-Cheng   

  1. Shanghai Institute of Ceramics. Chinese Academy of Sciences; Shanghai 200050; China
  • Received:2001-05-09 Revised:2001-06-04 Published:2002-05-20 Online:2002-05-20

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摘要： 研究了添加剂Al2O3对MgO和TiO２合成MgTiO3陶瓷烧结性、物相组成和微波介电性能的影响,XRD分析结果表明:没有添加Al2O3时,合成的MgTiO3陶瓷中只含有MgTiO3和MgTi2O5相;加入Al2O3后MgTiO3陶瓷中除了MgTiO3和MgTi2O5相外,还出现了MgAl2O4相,这是由于Al2O3和 MgO发生固相反应．MgAl2O4的出现虽然阻碍材料的致密化并导致密度下降,但是可以降低反应烧结合成MgTiO3陶瓷的相对介电常数和介电损耗．

关键词: MgTiO3陶瓷, 相对介电常数, 介电损耗

Abstract: MgTiO3 ceramics were prepared by MgO and TiO2 with Al2O3 added, the sintering, microwave dielectric
properties and phases were investigated. XRD shows that there are two phases in MgTiO3 ceramics without Al2O3 added: MgTiO3 phase and
MgTi2O5 phase; besides these phases, MgAl2O4 phase appears after Al2O3 added, because of the solid phase reaction between MgO and TiO2. Although the
MgAl2O4 phase impedes sintering and decreases the density, it decrease the the dielectric constant and the dielectric loss.

Key words: ceramics: dielectric constant, dielectric loss

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