분극전계가 모포트로픽 상경계 부근의 PZT 세라믹스의 공진주파수의 온도의존성에 미치는 영향

The Effect of Poling Strength on Temperature Dependence of Resonance Frequency of PZT Ceramics Near the Morphotropic Phase Boundary

  • 양정보 (한국전기안전공사 제주지사) ;
  • 양완석 (제주대 공대 전기전자공학부) ;
  • 이개명 (제주대 전기전자공학부)
  • 발행 : 2008.07.01

초록

Poling is an important process in fabricating PZT ceramic devices such as filters and resonators and activates piezoelectricity to sintered PZT ceramics. Tolerance of the operating frequency of these devices is tightly required in applications. And a factor to attribute the tolerance is the temperature dependence of the resonance frequency of PZT ceramics. In this paper the relationship of poling strength and temperature dependence of resonance frequency of PZT specimens was studied. The $Pb(Zr_{0.53}Ti_{0.47})O_3$ ceramics were fabricated and the poling strengths were chosen to be 0.5, 1.5, 2.5 and 3.5 [kV/mm]. The dielectric constant of the specimen poled in poling strength 0.5 [kV/mm] was less than that of unpoled specimen and the specimen poled in higher electric field had the higher dielectric constant. (002) peak in X-ray diffraction patterns of the specimens increased as poling strength increased. And the change of resonance frequency of the specimens according to the variation of temperature was measured. Resonance frequency of all specimens increased as the temperature increased. The specimen poled in higher electric field had the smaller positive temperature coefficient of resonance frequency. The effect that temperature coefficient of resonance frequency becomes smaller is obtained when Zr mole in PZT composition equation increase. Controlling the poling strength is believed to be a method to adjust the temperature stability of resonance frequency of the PZT ceramic devices.

키워드

참고문헌

  1. B. Jaffe, R. S. Roth and S. Marzullo, 'Piezoelectric properties lead zirconate lead titanate solid solution ceramics', J. Appl. Phys. 25 pp. 809-810, 1954 https://doi.org/10.1063/1.1721741
  2. S. Zhang, R. Xia and T. R. Shrout, 'Lead-free piezoelectric ceramics vs. PZT', IEEE ISAF 2006, pp. 612-615, 2006
  3. R. Zuo, C. Ye and X. Fang, 'Na0.5K0.5Nb3-BiFeO3 lead-free piezoelectric ceramics', J. of Phys. and Chem. of Solids 69, pp. 230-235, 2008 https://doi.org/10.1016/j.jpcs.2007.08.066
  4. M. Yamada, 'Ceramic resonators drive jitter away from in-car LANs', AEI(Asia Electronics), pp. 30-34, 2005
  5. M. Hirose, M. Takata, H. Oka and K. Miyabe, 'Relationship between poling condition and heat resisting properties in lead zirconate titanate', Jpn. J. of Appl. Phys. Vol. 33, Part 1, No. 9B, pp. 5345-5347, 1994 https://doi.org/10.1143/JJAP.33.5345
  6. S. Y. Chu, T. Y. Chen and I. t. Tsai, 'Effects of poling field on piezoelectric and dielectric properties of Nb additive PZT-based ceramics and their applications on SAW devices', Materials Letters 58, pp. 752-756, 2004 https://doi.org/10.1016/j.matlet.2003.07.004
  7. T. M. Kamel and G. With, 'Poling of hard ferroelectric PZT ceramics', J. Eur. Ceram. Soc. 28, pp. 1827-1838, 2008 https://doi.org/10.1016/j.jeurceramsoc.2007.11.023
  8. H. Banno and T. Tsunooka, 'Piezoelectric Properties and Temperature Dependences of Resonant Frequency of WO3-MnO2-Modified Ceramics of Pb(Zr-Ti)O3', Jpn. J. Appl. Phys. Vol. 6, No. 8, pp. 954-962, 1967 https://doi.org/10.1143/JJAP.6.954
  9. 일본전자재료공업회, '壓電セラミック振動子の試驗方法', EMAS-6004, pp. 1-28, 1982
  10. 田中哲郞, 岡崎淸 and 一ノ昇, '壓電セラミック材料', 學獻社, pp. 160-168, 1973
  11. A. Yamada, T. Ogawa and Y. K. Chung, 'Crystal orientation of tetragonal lead zirconate titanate ceramic surface and its aging behavior', Jpn. J. Appl. Phys. Vol. 36, Part 1, No. 9B, pp. 5958-5962, 1997 https://doi.org/10.1143/JJAP.36.5958
  12. A. Endriss, M. Hammer, M. J. Hoffmann, A. Kolleck and G. A. Schneider, 'Microscopic and macroscopic ferroelectric-ferroelastic and piezoelectric behavior of PZT ceramics', J. European Ceramic Society 19, pp.1229-1231, 1999 https://doi.org/10.1016/S0955-2219(98)00408-7
  13. H. Chen, J. Long and Z. Meng, 'Effect of Zr/Ti ratio on the properties of PMMN-PZT ceramics near morphotropic phase bounday', Material Science and Engineering B99, pp. 433-436, 2003