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


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 $7.6g/cm^3$.



Grant : 최적 수열조건을 이용한 PSZT 분말 제조

Supported by : 교육부


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