高温原位XRD法研究含硅杂质TiO<sub>2</sub>的煅烧相变机理

摘要为了揭示Si杂质元素对TiO₂相变机理的影响，通过TiCl₄水解法制得Si摩尔分数为10%的H₂TiO₃和H₄SiO₄的金红石中间体，用DTA-DTG，XRD研究TiO₂在Si元素作用下的高温相变过程。结果发现，掺杂Si（10%）元素的TiO₂是在650℃开始由无定形结构转变为锐钛矿相，1 000℃时由锐钛矿相转变为金红石相。结果表明：与纯的TiO₂相变温度相比，掺杂Si元素抑制了TiO₂由无定形到锐钛矿相及锐钛矿相到金红石相的转变温度；同时发现随着高温时间的增加TiO₂同种晶型结晶性变化规律。

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	魏炎斌
	徐本军
	罗弦
	龙永富

关键词： TiO₂ 硅热处理晶型转变

Abstract： In order to reveal the influence of Si impurity elements on the phase transformation mechanism of titanium dioxide, rutile intermediates of H₂TiO₃ and H₄SiO₄ doped with Si (10%) were prepared by TiCl₄ hydrolysis method. The high temperature phase transition of TiO₂ under the effect of doped-Si was studied by DTA-DTG and XRD. As a result, it was found that the Si(10%) doped TiO₂ was transformed from an amorphous structure to an anatase phase at 650℃, and changed from an anatase to a rutile phase at 1 000℃. The results show that compared with the pure TiO₂ phase transition temperature, the doping of Si inhibits the transformation temperature from amorphous to anatase and anatase to rutile. At the same time, it was found that with the increase of the high temperature time, the crystallinity of the same crystal form of titanium dioxide changes.

Keywords： titanium dioxide； silicon； heat treatment； crystal transformation

Received 2018-05-02;

Fund:国家自然科学基金项目（51664004）。

Corresponding Authors: 徐本军,E-mail:11793736@qq.com。 Email: 11793736@qq.com

About author: 魏炎斌(1991-),男,硕士研究生,现从事有色金属冶金方面的研究。

引用本文:

魏炎斌, 徐本军, 罗弦, 龙永富.高温原位XRD法研究含硅杂质TiO₂的煅烧相变机理[J]. 化学工业与工程, 2019,36(3): 8-15

Wei Yanbin, Xu Benjun, Luo Xian, Long Yongfu.Phase Transition Mechanism of Calcined Titanium Dioxide Containing Silicon by High Temperature In-Situ X-ray Diffraction[J]. Chemcial Industry and Engineering, 2019,36(3): 8-15

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