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无机材料学报

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板钛矿纳米TiO2微晶的热分析特性研究

叶锡生; 沙健; 焦正宽; 彭子飞+; 张立德+   

  1. 浙江大学物理系; 杭州 310027; 中国科学院固体物理研究所;合肥 230031
  • 收稿日期:1996-10-08 修回日期:1996-11-13 出版日期:1997-08-20 网络出版日期:1997-08-20

Studyon Thermal Analysis Behavior of Nanocrystalline Brookite TiO2

YE Xisheng; SHA Jian; JIAO Zhengkuan; PENG Zifei+; ZHANG Lide+   

  1. Department of Physics; Zhejiany University Hanyzhou 310027 China;+Institute of Solid State Physics; Chinese Academy of Sciences Hefei 230031 China
  • Received:1996-10-08 Revised:1996-11-13 Published:1997-08-20 Online:1997-08-20

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摘要： 对板钛矿纳米TiO2微晶样品（n－TiO2）进行了差热分析（DTA），发现其DTA曲线上出现了A、B两个吸热峰．通过对原始样品及其系列热处理样品进行X射线衍射（XRD）实验，证实A峰对应于物理或化学吸附的脱附过程，B峰完全对应于n－TiO2原始样品结构从板钛矿经锐钛矿向着金红石的一级相变；这一结构相变使成了纳米晶粒的生长．

关键词: 纳米TiO2微晶, 差热分析（DTA）, X射线分析, 一级相变

Abstract: Using DTA measurement on nanocrystalline brookite TiO2 sample, we found two endothermic peaks on DTA curve. From XRD analysis of the original nanocrystalline TiO2 and its heat-treating samples, we obtained the following results: the irst
endothermic peak (peak A) corresponds to the desorption of physical or chemical absorption; the second one (peak B) is elated to the first order phase transition from brookite to anatase then to rutile, and this structural phase transition is neficial
to the growth of nanocrystallilne grains.

Key words: nanocrystalline TiO2, DTA, XRD, first order phase transition