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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

湿化学法制备表面包覆BaTiO3纳米复合微粒及其结构表征

邹玲1; 乌学东1; 王大璞1; 吴旦1; 杨生荣2   

  1. 1. 上海交通大学化学化工学院, 上海 200240; 2. 中科院兰州化学物理研究所固体润滑国家重点实验室, 兰州 730000
  • 收稿日期:2001-04-17 修回日期:2001-06-05 出版日期:2002-05-20 网络出版日期:2002-05-20

Wet-Chemical Synthesis and Characterization of Surface-Modified Barium Titanate Nanocomposites

ZOU Ling1; WU Xue-Dong1; YANG Sheng-Rong2; WANG Da-Pu1; WU Dan1   

  1. 1. School of Chemistry and Chemical Engineering; Shanghai Jiao Tong University; Shanghai 200240; China; 2. State Key Laboratory of Solid Lubrication; Lanzhou Institute of Chemical Physics; Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2001-04-17 Revised:2001-06-05 Published:2002-05-20 Online:2002-05-20

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摘要： 通过湿化学法合成了表面包覆硬脂酸的钛酸钡纳米复合微粒．通过ＦＴ－ＩＲ和ＸＰＳ可以确认有机修饰层的极性基团通过化学键与无机内核结合;虽然BaTiO3结晶形态为无定型,但通过Ｒａｍａｎ和ＸＲＤ依然可以确定四方相结构,ＴＥＭ结果显示纳米微粒的尺寸在１０~２０ｕｍ左右．由于有机修饰层的存在影响了BaTiO3的成核机理和晶体生长过程中的择优取向．提出了硬脂酸表面有机修饰BaTiO3纳米微粒的形成机理,并给出其结构模型．

关键词: 钛酸钡, 纳米复合微粒, 表面修饰, 取向生长

Abstract: The wet-chemical preparation of barium titanate nanocomposites surface-coated with stearate was described. The chemical binding between stearate and metallic cations can be confirmed from both FT-IR and XPS results. Although amorphous BaTiO3 obtained, tetragonal phase of nuclei can be inferred from both XRD and Raman patterns. The particles size is around at 10-20nm determined by TEM morphology. The nucleation and epitaxial growth of crystalline are significantly effected in the presence of organic modifying groups.

Key words: barium titanate, nanoparticles, surface-modification, epitaxy

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