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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (3): 324-327. 上一篇    下一篇

研究论文

熔盐法制备SrTiO3片状晶的研究

刘韩星, 孙晓琴, 肖静, 程志政, 周建, 欧阳世翕   

  1. 武汉理工大学材料复合新技术国家重点实验室, 武汉, 430070
  • 投稿日期:2003-06-09 修回日期:2003-09-24 发布日期:2014-01-26
  • 通讯作者: 刘韩星,E-mail:lhxhp@mail.whut.edu.cn E-mail:lhxhp@mail.whut.edu.cn
  • 基金资助:
    国家自然科学基金(No.90206047)、863项目(No.2003AA325020)和教育部重大项目资助项目.

Study on Tabular SrTiO3 Processed by Molten Salt Synthesis Method

LIU Han-Xing, SUN Xiao-Qin, XIAO Jing, CHENG Zhi-Zheng, ZHOU Jian, OUYANG Shi-Xi   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070
  • Received:2003-06-09 Revised:2003-09-24 Published:2014-01-26

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采用熔盐法(MSS)合成了片状SrTiO3晶体,主要由两个步骤来完成,首先在助熔剂KCl中合成片状前驱体Sr3Ti2O7,然后再通过SrTiO3生长基元在第一步获得的片状晶体Sr3Ti2O7上进行生长制备出片状SrTiO3.采用扫描电镜(SEM)、 X射线衍射(XRD)分析产物的显微结构,表明熔盐法制备的SrTiO3具有纯度高、明显的片状结构等特点,在1200℃下保温4 h,产物的衍射指标与钛酸锶的标准图谱基本上完全一致.1200℃下保温2 h获得的片状钛酸锶晶粒尺寸基本上符合要求(长10～15 μm),而时间延长后,在1200℃下保温4 h获得的钛酸锶晶粒尺寸达到40 μm以上.常规固相合成SrTiO3具有球状显微结构.

关键词: 熔盐法, SrTiO3片晶, 显微结构, 固相合成反应

Tabular SrTiO3 crystals were synthesized by molten salt synthesis (MSS) method which included two steps: (1) synthesis of processing tabular precursor Sr3Ti2O7 particles in molten KCl; (2) tabular SrTiO3 crystal was obtained via the superposition of SrTiO3 basic cell on the interface of Sr3Ti2O7 particles based on the products of the first step. The conventional solid state reaction method was employed to synthesize SrTiO3 particles in the reaction condition of 1200℃ for 4 h. The microstructures of these reaction products were analyzed by scanning electron microscopy (SEM) and X-ray diffraction pattern (XRD). The results showed that tabular SrTiO3, obtained by MSS, had high purity and obvious tabular structure as well. XRD pattern showed that the conventional reaction products were obviously ball particles of SrTiO3.

Key words: molten salt synthesis, tabular SrTiO3, microstructure, solid state reaction