Structural and dielectric characteristics in a Ca(Mg1/3Nb 2/3)O3-CaZrO3 system

Chun Te Lee, Chi-Yuen Huang, Yi Chang Lin, Jacky Yang, Ying Chieh Lee

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

This study investigates the effect of CaZrO3 (CZ) substitution on the evolution of an ordered structure in a Ca(Mg1/3Nb 2/3)O3 (CMN) system using Raman spectroscopy, X-ray diffractometry, and transmission electron microscopy. It indicates that a (1-x) CMN-(x)CZ solid solution has the 1:2 and 1:1 ordered structure distorted by the antiphase, the inphase tilting of oxygen octahedra, and the antiparallel shift of A-site cation. A distinct correlation is noted between the transition of the ordered structure and microwave dielectric properties. The differences in εr and τf are attributed exclusively to the differences in the type of cation arrangement. The structure with the 1:2 ordering exhibits a lower relative permittivity and a more negative τf than the structure with the 1:1 ordering. The increased fraction of compressed Nb-O bond in the 1:2 ordered structure associated with a large NbO6 octahedral distortion is correlated with a decrease in relative permittivity and change of τf toward more negative values. Simultaneously, the substitution of the Zr4+ ion causes a linear increase in polarizability, and it also results in an increase in the relative permittivity.

原文English
頁(從 - 到)3148-3155
頁數8
期刊Journal of the American Ceramic Society
90
發行號10
DOIs
出版狀態Published - 2007 十月 1

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 材料化學

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