The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Piezoelectric Properties of lead free (Na0.44K0.52)Nb0.84O3-Li0.04(Sb0.06Ta0.1)O3 Ceramics with ZnO Addition

ZnO 첨가량에 따른 비납계 (Na0.44K0.52)Nb0.84O3-Li0.04(Sb0.06Ta0.1)O3 세라믹스의 압전 특성

  • 이동현 (광운대 전자정보대 전자재료공학과) ;
  • 이승환 (광운대 전자정보대 전자재료공학과) ;
  • 남성필 (경상대 공대 세라믹공학과) ;
  • 이영희 (광운대 전자재료공학과)
  • Received : 2010.08.24
  • Accepted : 2010.09.27
  • Published : 2010.11.01
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Abstract

Electrical and structural properties were investigated on the effects of ZnO and the lead-free NKN-LST ceramics with the addition of ZnO were fabricated by a conventional mixed oxide method. A gradual change in the crystal and microstructure was observed with the increase of ZnO addition. For the NKN-LST-ZnO ceramics sintered at $1050^{\circ}C$, bulk density increased with the addition of ZnO and showed maximum value at addition 2.0mol% of ZnO. Curie temperature of the NKN-LST-ZnO ceramics slightly decreased with adding ZnO. The dielectric constant, piezoelectric constant ($d_{33}$) and electromechanical coupling factor ($k_p$) increased at the small amount of ZnO addition, which might be due to the increase in density. The high piezoelectric properties = 153 pC/N, electromechanical coupling factor = 0.484 and dielectric constant = 2883 were obtained for the NKN-LST+0.5ZnO ceramics sintered at $1050^{\circ}C$ for 2h.

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References

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