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高等学校化学研究 ›› 1998, Vol. 14 ›› Issue (2): 184-187.

• Articles • 上一篇    下一篇

Studies on the Lanthanum-Modified Lead Titanate Ultrafine Particles by Raman Spectroscopy

CUI Ai-li1, GE Xu-dong1, HU Yong-qi1, JIN Yong1, WANG Xiao-hui2   

  1. 1. Department of Chemical Engineering, Tsinghua University, Beijing 100084;
    2. Department of Material Science, Tsinghua University, Beijing 100084
  • 收稿日期:1996-12-29 出版日期:1998-04-24 发布日期:2011-08-17

Studies on the Lanthanum-Modified Lead Titanate Ultrafine Particles by Raman Spectroscopy

CUI Ai-li1, GE Xu-dong1, HU Yong-qi1, JIN Yong1, WANG Xiao-hui2   

  1. 1. Department of Chemical Engineering, Tsinghua University, Beijing 100084;
    2. Department of Material Science, Tsinghua University, Beijing 100084
  • Received:1996-12-29 Online:1998-04-24 Published:2011-08-17

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摘要： Lanthanum-modified lead titanate(PLT14) ultrafine particles were synthesized by means of stearic acid gel method. The structure of the samples was characterized using X-ray diffraction(XRD) and TEM. The crystal graphic parameters of the samples were calculated. The Raman spectra of PLT14 powders at a high pressure as well as a high temperature reveal that the phase transition pressure or temperature shifts to a lower pressure or temperature with the decrease of grain size.

关键词: Raman spectrum, PLT, Ultrafine particle, Size effect

Abstract: Lanthanum-modified lead titanate(PLT14) ultrafine particles were synthesized by means of stearic acid gel method. The structure of the samples was characterized using X-ray diffraction(XRD) and TEM. The crystal graphic parameters of the samples were calculated. The Raman spectra of PLT14 powders at a high pressure as well as a high temperature reveal that the phase transition pressure or temperature shifts to a lower pressure or temperature with the decrease of grain size.

Key words: Raman spectrum, PLT, Ultrafine particle, Size effect