| Original Articles |
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Structure and Raman Spectroscopy of Nanocrystalline TiO2 Powder Derived by Sol-Gel Process |
| ZHOU Qi-fa;WU Shang-hua;ZHANG Qing-qi;ZHANG Jin-xiu;CHEN Jian1;ZHANG Wei-hong1 |
| Department of Physics, Zhongshan University, Guangzhou 510275
Instrument Analysis and Research Center, Zhongshan University, Guangzhou 510275 |
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| Cite this article: |
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ZHOU Qi-fa, WU Shang-hua, ZHANG Qing-qi et al 1997 Chin. Phys. Lett. 14 306-309 |
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Abstract Nanocrystalline TiO2 powder was prepared by sol-gel process. The structures of the as-prepared and the TiO2 powder heat-treated at different temperatures were studied by thermogravimetric analyzer, differential thermal analysis, x-ray diffraction, and Raman spectra. As the powder was heat-treated at 350°C, it turned into tetragonal anatase structure. A structural transformation from anatase to rutile type occurred and the grains of the powder grew drastically when the powder was heat-treated at above 550°C. The structural transformation from anatase to rutile type completed at 750°C. The Raman spectra of TiO2 nanocrystalline powder were also studied.
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| Keywords:
78.66.Sq
42.65.An
42.70.Nq
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Published: 01 April 1997
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| PACS: |
78.66.Sq
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(Composite materials)
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42.65.An
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(Optical susceptibility, hyperpolarizability)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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