Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effects of Ta Substitution on Dielectric and Piezoelectric Properties of Pb-free (Na0.53K0.47)(Nb1-xTax)O3 Ceramics

Ta 치환에 따른 비납계 (Na0.53K0.47)(Nb1-xTax)O3 세라믹의 압전 및 유전 특성

  • Lee, Jung-Hoon (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Ryu, Gyung-Hyun (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Sung, Yeon-Soo (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Cho, Jong-Ho (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Song, Tae-Kwon (School of Nano & Advanced Materials Engineering, Changwon National University) ;
  • Kim, Myong-Ho (School of Nano & Advanced Materials Engineering, Changwon National University)
  • 이정훈 (창원대학교 나노신소재공학부) ;
  • 류경현 (창원대학교 나노신소재공학부) ;
  • 성연수 (창원대학교 나노신소재공학부) ;
  • 조종호 (창원대학교 나노신소재공학부) ;
  • 송태권 (창원대학교 나노신소재공학부) ;
  • 김명호 (창원대학교 나노신소재공학부)
  • Received : 2011.06.01
  • Accepted : 2011.08.26
  • Published : 2011.09.30
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Abstract

Pb(Zr,Ti)$O_3$ (PZT) based ceramics with superior piezoelectric properties have been extensively used in various domestic and industrial appliances. However, PZT ceramics causing environmental contamination and health problems need to be eventually replaced by any of Pb-free materials. $(Na_{0.53}K_{0.47})(Nb_{1-x}Ta_x)O_3$ (NKNT), one of Pb-free piezoelectric ceramics, has long been known but its properties are not fully understood and developed. In this study, dielectric and piezoelectric properties of Pb-free NKNT ceramics were studied with Ta substitution for B-site at x = 0~0.6. It was found that polymorphic phase transition (PPT) between orthorhombic and tetragonal phases was notably influenced by Ta substitution. The highest piezoelectric coefficient ($d_{33}$) of 284 pC/N was occurred at x = 0.45.

Keywords

References

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