高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (1): 6.

• 论文 • 上一篇    下一篇

硝酸根离子介质中偏钛酸钡的水热合成

吴明娒, 李理, 徐如人   

  1. 吉林大学无机水热合成开放实验室, 长春 130023
  • 收稿日期:1995-03-07 出版日期:1996-01-24 发布日期:1996-01-24
  • 通讯作者: 吴明娒,男,32岁,副教授,现在中山大学化学系.
  • 作者简介:吴明娒,男,32岁,副教授,现在中山大学化学系.
  • 基金资助:

    国家自然科学基金;无机水热合成开放实验室基金

Hydrothermal Synthesis of BaTiO3 in the Presence of NO3-Ion

WU Ming-Mei, LI Li, XU Ru-Ren   

  1. Key Laboratory of Inorganic Hydrothermal Synthesis, Jilin University, Changchun 130023
  • Received:1995-03-07 Online:1996-01-24 Published:1996-01-24

摘要: 以硝酸钡和钛酸四丁酯为原料,在240℃的碱液中成功地制备了四方相BaTiO3.运用XRD、DSC和IR等技术研究了碱度、硝酸根离子、钛源活性、填充度等因素对BaTiO3形成、粒度和物相的作用。KOH最合宜浓度为1.0mol/L,碱液中BaTiO3是BaO-TiO2体系中最稳定的物相,硝酸根离子参与了BaTiO3晶体的成核和生长,钛源的高活性和高填充度有利于四方相BaTiO3的形成。

关键词: 四方相BaTiO3, 水热合成, 硝酸根离子, 活性钛源

Abstract: Tetragonal BaTiO3 was prepared hydrothermally in alkaline aqueous solution ofBa(NO3)2 and Ti(OC4H9)4 at as low as 240℃. The influence of alkalinity, nitrate ion,reactivity of titanium source and degree of fill on the formation, particle sizes and morpholo-gies was investigated by means of XRD, DSCand IR.The optimum KOHconcentration wasabout 1.0 mol/L, in which BaTiO3 was the stablest phase among the family of BaO-TiO2.The nitrate ion played a positive role in the formatin and growth of BaTiO3 fine crystals. TheMgher the reactivity of titanium source and degree of fill is, the easier the formatin of tetragonal BaTiO3 is.

Key words: Tetragonal BaTiO3, Hydrothermal synthesis, Nitrate ion, Reactive titanumsource

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