Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (6): 655-658.doi: 10.3724/SP.J.1077.2011.00655

• Research Paper • Previous Articles     Next Articles

Study of Structure and Dielectric Properties of (Ba1-xCax)(Ti0.82Zr0.18)O3 Ceramics

NA Wen-Ju, DING Shi-Hua, SONG Tian-Xiu, WANG Jiu-Shi, WANG Yan   

  1. (College of Materials Science & Engineering, Xihua University, Chengdu 610039, China)
  • Received:2010-09-03 Revised:2010-10-23 Online:2011-06-20 Published:2011-06-07
  • Contact: DING Shi-Hua E-mail:dshihua@263.net
  • Supported by:

    National Natural Science foundation of China (11074203); Talents foundation of Xihua university (R0620109); Key Disciplinary of Materials Science (XZD0814-09-1); Innovation Fund of Postgraduate, Xihua University (YCJJ200924)

Abstract: (Ba1-xCax)(Ti0.82Zr0.18)O3(BCZT, 0≤x≤0.26) ceramics was prepared by a solid phase reaction. The effect of Ca2+ doping on the microstructure and dielectric properties of the ceramics was studied. Results showed that the solid solubility lay around x=0.16 for BCZT ceramics while the second phase was observed. The value of c/a changed as the U-type curve with the variation of the Ca2+, and the minimum of the c/a was 1.00276 at x=0.06. It was found that Ca2+ ion substitution can be almost incorporated into the A site by the calculation of the tolerance factor and lattice constant. With increasing Ca2+ ion content, the grain size was decreased. The Curie temperature was shifted to low temperature, and the εr-T peak was decreased and broaden. The relaxor characteristics were obtained while Ca2+ ion content was further increased.

Key words: BCZT ceramics, solid solubility, tetragonality of c/a, dielectric properties

CLC Number: 

  • TM22