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Acta Chimica Sinica ›› 2006, Vol. 64 ›› Issue (6): 574-578. Previous Articles     Next Articles

水热重结晶法制备四方相纳米Ba0.9Ca0.1TiO3晶体的研究

张维维，沈志刚，闫涛，陈建峰*   

  1. (北京化工大学 纳米材料先进制备技术与应用科学教育部重点实验室 教育部超重力工程研究中心 北京 100029)
  • 投稿日期:2005-08-09 修回日期:2005-11-11 发布日期:2006-03-28
  • 通讯作者: 陈建峰

Study on Hydrothermal Recrystallization Method for Synthesis of Tetragonally Structured Ba0.9Ca0.1TiO3 Nanocrystals

ZHANG Wei-Wei, SHEN Zhi-Gang, YAN Tao, CHEN Jian-Feng*   

  1. (Key Laboratory for Nanomaterials, Research Center of the Ministry of Education of China for High Gravity Engineering and Technology, Beijing University of Chemical Technology, Beijing 100029)
  • Received:2005-08-09 Revised:2005-11-11 Published:2006-03-28
  • Contact: CHEN Jian-Feng

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A novel hydrothermal recrystallization route has been developed to produce tetragonal Ba0.9Ca0.1TiO3 nanocrystals. The obtained powders were analyzed by TEM, XRD, Raman spectra, FTIR, TG and dielectric property measurements, and showed much less hydroxyl lattice defects, higher purity and better crystallinity than those prepared by low-temperature aqueous synthesis (LTAS) method. The hydroxyl lattice defect was key factor to influence the phase transition from paraelectric cubic to ferroelectric tetragonal structure.

Key words: Ba0.9Ca0.1TiO3, hydrothermal recrystallization method, hydroxyl lattice defect