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无机材料学报

• 研究论文 • 上一篇    下一篇

BaTiO3纳米晶机械力化学合成

吴其胜1; 高树军2; 张少明2; 杨南如2   

  1. 1. 江苏盐城工学院, 江苏盐城 224003; 2. 南京化工大学 , 南京 210009
  • 收稿日期:2001-07-06 修回日期:2001-08-21 出版日期:2002-07-20 网络出版日期:2002-07-20

Nano-Crystalline BaTiO3 Synthesized by Mechanochemistry

WU Qi-Sheng1; GAO Shu-Jun2; ZHANG Shao-Ming2; YANG Nan-Ru2   

  1. 1. Yancheng Institute of Technology; Jiangsu 224003; China; 2. Nanjing University of Chemical Technology; Nanjing 210009; China
  • Received:2001-07-06 Revised:2001-08-21 Published:2002-07-20 Online:2002-07-20

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摘要： 在氮气保护下,采用高能球磨BaO,锐钛矿型TiO2混合粉体,机械力化学法成功地合成了BaTiO3纳米晶,并讨论了反应机制.发现在一定操作参数条件下,粉磨初期为无定形形成期（15h以前）,混合物颗粒粒度减小,晶格畸变,转变为无定形;粉磨中期为固相反应期（15～30h）;BaO与TiO2在机械力的作用下产生固相反应生成BaTiO3,同时BaTiO3晶粒长大;粉磨后期又转入动态平衡期（30h以后）,固相反应基本结束,已生成的BaTiO3的晶粒生长与粉磨引起的晶粒减小处于动态平衡;XRD,SEM;TEM研究表明:合成BaTiO3纳米晶体的晶粒尺寸为10～30nm.

关键词: 机械力化学, 纳米晶体, 钛酸钡, 合成

Abstract: The nano-crystalline BaTiO3 was successfully synthesized by grinding the mixture of BaO and anatase
TiO2 in a high-energy mill in nitrogen atmosphere and its mechanism was also discussed. The results suggested that the first stage of
mechanochemical treatment in initial 15h resulted in the occurrence of decreasing of crystalline size and distorting of crystalline lattice together
with amorphization in the mixture powder. BaTiO3 phase was formed by solid reaction in the mixture powder mechanochemically for 15h to 30h
at the second stage. In the meantime the crystalline particle grew up. At the last stage of further treatment after 30h the crystalline size of
synthesized BaTiO3 almost didn’t change, because the growing and decreasing of crystalline particle was in a dynamic equilibrium. The crystalline sizes of
synthesized BaTiO3 by mechanochemistry were in the range of 10 to 30nm by XRD, SEM and TEM.

Key words: mechanochemistry, nano-crystalline, Barium titanate, synthesize

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