Preparation of PZT Powders by Hydrothermal Synthesis : Effects of Starting Materials and the Agitation of Substrate on Powder Characteristics

수열합성법에 의한 PZT 분말제조 : 출발물질과 기질의 교반이 분말특성에 미치는 영향

  • Jung, S.T. (School of Chem. Eng. & Biotech. Ajou University) ;
  • Lee, K.J. (School of Chem. Eng. & Biotech. Ajou University) ;
  • Seo, K.W. (School of Chem. Eng. & Biotech. Ajou University)
  • 정성택 (아주대학교 화학.생물공학부) ;
  • 이기정 (아주대학교 화학.생물공학부) ;
  • 서경원 (아주대학교 화학.생물공학부)
  • Received : 1996.12.18
  • Accepted : 1997.03.14
  • Published : 1997.04.10

Abstract

In this study PZT powders were prepared with shapes of cubic by hydrothermal synthesis with various starting materials, and the sintering characteristics of the powders were investigated. The particle shapes were cubic regardless of starting materials, but the mean size of particles formed using $Pb(NO_3)_2$, $Ti(OC_4H_9)_4$ and $Zr(OC_4H_9)_4$ was relatively smaller than that of particles prepared from other starting materials. Agitation of the feedstock during hydrothermal reaction results in decreasing the required reaction temperature for the formation of nuclei, and in increasing the size of product particles. XRD results showed that the major phase of PZT crystal powders was a tetragonal phase at the Zr to Ti ratio of 40 to 60, or a rhombohedral phase at its ratio of 60 to 40. The density of a sintered body made from the hydrothermal powders in PbO surrounding varied with sintering temperatures and with periods of sintering time. The experimental results also showed that the optimum sintering condition was at $1150^{\circ}C$ for a 2hr sintering, and that the density of a sintered body was $7.6g/cm^3$.

Keywords

Acknowledgement

Grant : 최적 수열조건을 이용한 PSZT 분말 제조

Supported by : 교육부

References

  1. Piezoelectric Ceramics B. Jaffe;W. R. Cook;H. Jaffe
  2. J. Kor. Ceram. Soc. v.30 천재일;김호기
  3. 無機材科原科工學 李種根
  4. Introduction to Ceramics W. D. Kingery;H. K. Bowen;D. R. Uhlmann
  5. Advanced Ceramic Processing and Technology J. G. P. Binner
  6. Ceramic Bulletin v.67 W. J. Dawson
  7. 한국결장성장학회지 v.6 반종성;이기정;서경원;목영일;이철경
  8. Process Control in the Manufacture of Ceramics : Materials Sience and Technology - Vol. 17AB v.17AB G. de With;R. W. Cahn(ed.);P. Haasen(ed.);E. J. Kramer(ed.)
  9. J. Am. Ceram. Soc. v.50 A. H. Webster;T. B. Westone;N. H. Bright
  10. J. Am. Soc. v.68 D. Bara
  11. J. Ceram. Soc. Jpn. v.101 D. Dong;K. Murakami;S. Kaneko;M. Xion
  12. IEEE A study of the sintering mechanism of PZT-based piezoelectrics P. W. Lu;W. R. W. Hubner
  13. KJChE. v.13 K. J. Lee;K. W. Seo;H. S. Yu;Y. I. Mok
  14. 한국자원연구소, 아주대학교 연구보고서 수열합성법에 의한 단결정 산화물제조의 기초 연구
  15. 한국결장성장학회지 v.6 정성택;이기정;서경원