Journal of Ceramic Processing Research

Ceramic Processing Research Center (한양대학교 세라믹연구소)
권호 표지

Electrical properties of (Na0.5K0.5)NbO3-BiTiO3 ceramics with the variation of sintering temperature

  • Lee, Tae-Ho (Department of Ceramic Engineering, Eng. Res. Inst. Gyeongsang National University) ;
  • Lee, Sung-Gap (Department of Ceramic Engineering, Eng. Res. Inst. Gyeongsang National University)
  • Published : 2012.11.01
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Abstract

Piezoelectric 0.93(Na0.5K0.5)NbO3-0.07BiTiO3 (NKN-BTO) ceramics were fabricated by the mixed-oxide method and their structural and dielectric properties was investigated with the variation of sintering temperature. All specimens were crystallized in the perovskite single phase without any formation of a second phase such as pyrochlore. The average grain size of the NKN-BTO specimen sintered at 1130 ℃ is 0.32 ㎛. The specimen sintered at 1100 ℃ showed the highest relative density of 98%. Electromechanical coupling factor, relative dielectric constant and dielectric loss of the NKN-BTO specimens sintered at 1110 ℃ were 0.31, 1222 and 0.02, respectively. Curie temperature of the specimen sintered at 1110 ℃ was 445 ℃.

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