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Piezoelectric Properties in ZnO Dopped (Na,K)NbO3 Ceramics

ZnO가 첨가된 (Na,K)NbO3계 세라믹스의 압전 특성

  • 류성림 (충주대학교 신소재공학과/친환경 에너지변환, 저장 소재 및 부품개발 연구센터) ;
  • 권순용 (충주대학교 신소재공학과/친환경 에너지변환, 저장 소재 및 부품개발 연구센터) ;
  • 어순철 (충주대학교 신소재공학과/친환경 에너지변환, 저장 소재 및 부품개발 연구센터) ;
  • 김시철 (충주대학교 신소재공학과/친환경 에너지변환, 저장 소재 및 부품개발 연구센터) ;
  • 류주현 (세명대학교 전기공학과)
  • Published : 2006.08.01

Abstract

ZnO was doped up to 0.3 wt% for improving the electrical properties of lead-free $[Li_{0.04}(Na_{0.44}Ko_{0.52})-(Nb_{0.86}\;Ta_{0.10}\;Sb_{0.04})]O_3$ piezoelectric ceramics. The ceramics were fabricated with the conventional sintering processes. Crystal structure of the samples was tetragonal phase regardless of ZnO amount. However, the piezoelectric properties were varied with the ZnO amount. The electro-mechanical coupling factor $(k_p)$ was with the ZnO amount up to 0.2 wt% but decreased with the further addition. the maximum value of $k_p$ was 0.475. Density, piezoelectric charge constant and relative dielectric constant was also showed maximum value at 0.2 wt%. The maximum values are $4.75g/cm^3$, 275 pC/N, 1403, respectively. In contrast, the mechanical quality factor $(Q_m)$ was not varied with increasing the ZnO addition up to 0.2 wt% but rapidly increased at 0.3 wt%.

References

  1. 류주현, 오동언, 'PNW-PMN-PZT 세라믹스를 이용한 윤곽진동모드 압전트랜스포머의 전기적 특성', 전기전자재료학회논문지, 15권, 7호, p. 602, 2002
  2. 민석규, 오동언, 윤광희, 류주현, 박창엽, 김종선, '$Pb(La,Ce)TiO_3$계 세라믹스의 길이와 두께비(l/t)에 따른 공진특성', 전기전자재료학회논문지, 14권, 9호, p. 720, 2001
  3. J. H. Yoo, D. O. Oh, Y. H. Jeong, J. H. Hong, and M. Y. jung, 'Dieiectric and piezoeiectric characteristic of lead-free $Bi_{0.5}(Na_{0.84}K_{0.16})_{0.5} TiO_3$ ceramics substituted with Sr', Materials Letters, Vol. 58, p. 3831, 2004 https://doi.org/10.1016/j.matlet.2004.08.011
  4. E. Ringgaard and T. Wurlitzer, 'Lead-free piezoceramics based on alkali niobates', J. Europ, Cera. Soc., Vol. 25, Iss. 12, p. 2701, 2005 https://doi.org/10.1016/j.jeurceramsoc.2005.03.126
  5. H. Birol, D. Damjanovic, and N. Setter, 'Preparation and characterization of $(K_{0.5}Na_{0.5})NbO_3$ ceramics', J. Europ. Cera. Soc., In press, Vol. 25, Iss. 10, p. 1983, 2005
  6. T. Wada, K. Toyoike, Y. Imanaka, and Y. Matsuo, 'Dielectric and piezoelectric properties of $(A_{0.5}Bi_{0.5})TiO_3-ANbO_3(A=Na,K)$) Systems', Jpn. J. Appl. Phys., Vol. 40, No. 9B, p. 5703, 2001 https://doi.org/10.1143/JJAP.40.5703
  7. K. Kakimoto, I. Masuda, and H. Ohsato, 'Solid-solution structure and piezoelectric property of $KNbO_3$ ceramics doped with small amounts of elements', Jpn. J. Appl. Phys., Vol. 43, No. 9B, p. 6706, 2004 https://doi.org/10.1143/JJAP.43.6706
  8. Y. Guo, K. Kakimoto, and H. Ohsato, '$(Na_{0.5}K_{0.5})NbO_3-LiTaO_3$ lead free piezoelectric ceramics', Materials Letters, Vol. 59, Iss. 2-3, p. 241, 2005 https://doi.org/10.1016/j.matlet.2004.07.057
  9. S. H. Park, C. W. Ahn, S. Nahm, and J. S. Song, 'Microstructure and piezoelectric properties of ZnO-added $(Na_{0.5}K_{0.5})NbO_3$ ceramics', Jpn. J. Appl. Phys., Vol. 43, No. 8B, p. L1072, 2004 https://doi.org/10.1143/JJAP.43.L1072
  10. R. Wang, R. Xie, T. Sekiya, and Y. Shimoyo, 'Fabrication and characterization of potassium sodium niobate piezoelectric ceramics by spark plasma sintering method', Materials Research Bulletin, Vol. 39, p. 1709, 2004 https://doi.org/10.1016/j.materresbull.2004.05.007
  11. M. Matsubara, T. Yamaguchi, K. Kikuta, and S. Hirano, 'Sintering and piezoelectric properties of potassium sodium niobate ceramics with newly developed sintering aid', Jpn. J. Appl. Phys., Vol. 44, No. lA, p. 258, 2005 https://doi.org/10.1143/JJAP.44.258
  12. Y. Saito, H. Takao, T. Tani, T. Nonoyama, K. Takatori, T. Homma, T. Nagaya, and M. Nakamura, 'Lead-free piezoceramics', Nature, Vol. 43214, p. 84, 2004