The Piezoelectric Degradation and Mechanical Properties in PZT Ceramics with $MnO_2$ Addition

$MnO_2$를 첨가한 PZT 세라믹스의 압전열화 및 기계적 특성

  • 김종범 (강원대학교 재료공학과) ;
  • 최성룡 (강원대학교 재료공학과) ;
  • 윤여범 (강원대학교 재료공학과) ;
  • 태원필 (강원대학교 재료공학과) ;
  • 김송희 (포항공대 항공재료 연구센터 겸직)
  • Published : 1997.03.01

Abstract

The aim of this study was to investigate the degradation of piezoelectric properties with compressive cy-clic loading, the change in bending strength before and after poling treatment and fracture strength in MPB depending on the amount of MnO2 addition. The MPB with 0.25 wt.% MnO2 showed the best resistance against the piezoelectric degradation with compressive cyclic loading. Bending strength increased when pol-ing and loading directions are parallel, however decreased when poling and loading directions are per-pendicular each other. Because, during poling treatment, compressive residual stress is generated in the pol-ing direction but tensile residual stress in the perpendicular direction to poling direction.

MPB조성영역에 MnO2를 첨가한 압전체를 제조하여 분극처리후에 반복압축응력을 부여함에 따른 압전열화 현상을 조사하고 분극처리 전후의 굽힘강도의 변화 및 파괴특성을 연구하였다. MnO2를 0.25wt.% 첨가한 시편에서 가장 적은 열화현상이 일어났다. 굽힘강도는 분극처리 후 하중방향에 평행한 방향으로 분극처리한 시편이 분극처리 전보다 높은 강도를 나타내었고, 수직한 방향으로 분극처리한 시편은 낮은 값을 나타내었다. 이는 분극처리시 발생하는 전계방향으로 압축잔류응력, 직각방향으로 인장잔류응력 때문인 것으로 사료된다.

Keywords

References

  1. Piezoelectric ceramics B. Jaffe;W. R. Cook;H. Jaffe
  2. J. Am. Ceram. Soc. v.49 no.11 Piezoelectric properties of Pb(Mg$_{1/3}Nb_{2/3})O₃-PbTiO₃-PbZrO₃ceramics Modified with cetain additives H. Ouchi;M. Nishida;S. Hayakawa
  3. Jpn. J. Appl. Phy. v.31 Effects of Manganese Addition on Piezoelectric Properties of Pb(Zi$_{0.5}, Ti_{0.5})O₃ Toshio Kamiya;Toshimasa Suzuki;Takaaki Tsurumi;Masaki Daimon
  4. Ferroelectrics v.51 Structural studies of Manganese stabilized Lead-Zirconate-Titanate S. S. NG;S. M. Alexander
  5. Ferroelectrics v.37 Effect of Oxidation States of Mn on The Phase Stability of Mn-doped Ba-T₁O₃ S. B. Desu;E. C. Subbara
  6. J. Kor. Ceram. Soc. v.29 no.10 Fracture Behavior and Degradation of Piezoelectric Properties in PZT W. P. Tai;S. H. Kim;S. H. Cho
  7. J. Am. Ceram. Soc. v.52 no.8 Average Grain Size in Polycrystalline Ceramics M. I. Mendelson
  8. EMAS-6003 Electric Material Manufactures Association Standard 電子材料工業會
  9. 압전 전왜 세라믹스 김호기;신병철
  10. 전기 전자용 압전세라믹스 박창엽
  11. J. Appl. Phys. v.12 Coupling Factor of Piezoelectric Ceramaic Disks D. S. Compell;MacSwan
  12. J. Kor. Ceram. Soc v.28 no.5 The Analysis of degradation Phenomena in Piezoelectric Ceramics by Equivalent Circuit analysis Method J. H. Shon;W. H. Jung;J. J. Kim;J. H. Kim;S. H. Cho
  13. J. Mat. Sci. & Eng. v.B38 Relationship between cyclic loading and degradation of Piezoelectric Properties in Pb(Zr, Ti)O₃Ceramics Weon-Pil Tai;Song-Hee Kim