Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Structural and Electrical Properties of (Na0.465K0.465Bi0.07)(Nb0.93Ti0.07)O3-0.08MnO2 Ceramics with Variation of Sintering Temperature

소결온도에 따른 (Na0.465K0.465Bi0.07)(Nb0.93Ti0.07)O3-0.08MnO2 세라믹스의 구조적, 전기적 특성

  • Lee, Tae-Ho (Department of Ceramic Engineering, Eng. Res. Inst. Gyeongsang National University) ;
  • Yeo, Jin-Ho (Department of Ceramic Engineering, Eng. Res. Inst. Gyeongsang National University) ;
  • Lee, Sung-Gap (Department of Ceramic Engineering, Eng. Res. Inst. Gyeongsang National University)
  • 이태호 (경상대학교 세라믹공학과) ;
  • 여진호 (경상대학교 세라믹공학과) ;
  • 이성갑 (경상대학교 세라믹공학과)
  • Received : 2012.05.22
  • Accepted : 2012.06.25
  • Published : 2012.07.01
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Abstract

In this study, lead-free $(Na_{0.465}K_{0.465}Bi_{0.07})(Nb_{0.93}Ti_{0.07})O_3-0.08MnO_2$ ceramics were fabricated by conventional mixed oxide method. Structural and electrical properties of lead-free $(Na_{0.465}K_{0.465}Bi_{0.07})(Nb_{0.93}Ti_{0.07})O_3-0.08MnO_2$ ceramics with the variation of sintering temperature were investigated. As results of x-ray diffraction analysis, all specimens showed a typical polycrystalline perovskite structure without presence of the second phase. Sintered density increased with an increases of sintering temperature and the specimen sintered at $1,020^{\circ}C$ showed the maximum value of 4.5 $g/cm^3$. The average grain size of the $(Na_{0.465}K_{0.465}Bi_{0.07})(Nb_{0.93}Ti_{0.07})O_3-0.08MnO_2$ specimen sintered at $1,020^{\circ}C$ is about 0.83 ${\mu}m$. Electromechanical coupling factor, relative dielectric constant and dielectric loss of $(Na_{0.465}K_{0.465}Bi_{0.07})(Nb_{0.93}Ti_{0.07})O_3-0.08MnO_2$ specimens sintered at $1,020^{\circ}C$ were 0.252, 741 and 0.043% respectively.

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References

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