高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (4): 515.

• 论文 • 上一篇    下一篇

量子顺电体La1/2Na1/2TiO3纳米晶的制备与谱学表征

张伟风1, 张兴堂1, 郭虹1, 方江邻2, 张明生2   

  1. 1. 河南大学物理系, 开封 475001;
    2. 南京大学现代分析中心, 南京 210093
  • 收稿日期:1998-04-21 出版日期:1999-04-24 发布日期:1999-04-24
  • 通讯作者: 张伟风,男,33岁,硕士,副教授.
  • 作者简介:张伟风,男,33岁,硕士,副教授.
  • 基金资助:

    河南省自然科学基金

Preparation and Characterization of Quantum Paraelectric La1/2Na1/2TiO3Nanocrystals

ZHANG Wei-Feng1, ZHANG Xing-Tang1, GUO Hong1, FANG Jiang-Lin2, ZHANG Ming-Sheng2   

  1. 1. Department of Physics, Henan University, Kaifeng, 475001;
    2. Center for Materials Analysis, Nanjing University, Nanjing, 210093
  • Received:1998-04-21 Online:1999-04-24 Published:1999-04-24

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摘要： 用改进硬脂酸溶胶-凝胶法制备了量子顺电体La1/2Na1/2TiO3纳米晶,用差热-热重分析和X射线衍射测试了样品的晶化过程及物相结构,用FTIR和Raman光谱表征了其谱学特性.

关键词: La1/2Na1/2TiO3, 纳米晶体, 溶胶－凝胶法, 晶格振动谱

Abstract: Quantum paraelectric La1/2Na1/2TiO3nanocrystals have successfully been prepared by using improved sol-gel method in which absolute alcohol and stearic acid were used as the solvent. X-ray diffraction results show that the as-prepared sample is a pure La1/2Na1/2TiO3with an acubic perovskite-type structure. The mean crystallite sizes were controlled by varying annealing temperatures. FTIR and Raman measurements reveal nano-size effects on the vibration spectroscopic properties of the nanocrystalline La1/2Na1/2TiO3.

Key words: La1/2Na1/2TiO3, Nanocrystal, Sol-gel method, Lattice vibration spectroscopy

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