| 纳米锐钛矿相变的原位XRD研究 | |
| In situ XRD Study on the Phase Transformation of Nanoanatase | |
| 摘要: | |
| 关键词: 纳米锐钛矿 原位XRD 相变 微应力 | |
| 基金项目: | |
| Abstract: The essence of the phase transformation of nanotitania is the change of the numbers of edges and corners shared by Ti-O octahedra. The microstructure characteristic of the anatase particle, such as the microstrain of lattice, affects its transformation to the rutile structure. In order to investigate the effect of the microstrain on nanoanatase transformation, phase pure anatase was prepared by sol-hydrolysis of TiCl4 in ammonium sulfate solution and its transformation process was investigated by in situ XRD. Based on the in situ XRD data, the variation of the diameter and its distribution, and the microstrain of the nanotitania particles were estimated with Win XRD software. The results show that the process of the transformation can be divided into four steps; the rate competition between the anatase growth and the transformation from anatase to rutile determines the size distribution and the diameter of anatase nanoparticles; and during the phase transformation, the microstrain determines the rates of the anatase growth and the transformation. | |
| Keywords: nanoanatase in situ XRD phase transformation microstrain | |
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| 郑遗凡,李国华,田伟,马淳安.纳米锐钛矿相变的原位XRD研究[J].无机化学学报,2007,23(6):1121-1125. | |
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