Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Dielectric and Piezoelectric Properties of Lead-free (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3 Ceramics

비납계 (Bi0.5Na0.5)TiO3-(Bi0.5K0.5)TiO3 세라믹의 유전 및 압전 특성

  • Cho J. A. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Kuk M.-H. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Sung Y. S. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Lee S. H. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Song T. K. (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Jeong S. J. (Korea Electrotechnology Research Institute, Electric and Magnetic Devices Research group) ;
  • Song J. S. (Korea Electrotechnology Research Institute, Electric and Magnetic Devices Research group) ;
  • Kim M.-H. (School of Nano & Advanced Materials Engineering, Changwon National University)
  • 조정아 (창원대학교 나노 신소재공학부) ;
  • 국민호 (창원대학교 나노신소재공학부) ;
  • 성연수 (창원대학교 나노 신소재공학부) ;
  • 이수호 (창원대학교 나노 신소재공학부) ;
  • 송태권 (창원대학교 나노 신소재공학부) ;
  • 정순종 (한국전기연구원 전자기소자그룹) ;
  • 송재성 (한국전기연구원 전자기소자그룹) ;
  • 김명호 (창원대학교 나노 신소재공학부)
  • Published : 2005.10.01
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Abstract

Lead-free $[Bi_{0.5}(Na_{1-x}K_x)_{0.5}TiO_3](x=0\~1.0)$ ceramics were prepared using a solid state reaction method and their structural and electrical characteristics were investigated. X-ray investigations indicated that the rhombohedral-tetragonal morphotropic phase boundary(MPB) of the $[Bi_{0.5}(Na_{1-x}K_x)TiO_3$ ceramics exists in the range of $x=0.16\~0.20$. The optimum values of piezoelectric constant$(d_{33})$, dielectric constant, and electromechanical coupling factor $(k_p)$ were obtained at $x=0.16\~0.20$ of the MPB region.

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References

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