论文成果
Preparation and characterization of the TiO2 ultrafine particles by detonation method
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- 论文类型：期刊论文
- 发表时间：2008-01-08
- 发表刊物：MATERIALS RESEARCH BULLETIN
- 收录刊物：SCIE、EI
- 文献类型：J
- 卷号：43
- 期号：1
- 页面范围：97-103
- ISSN号：0025-5408
- 关键字：oxides; nanostructures; crystal growth; high pressure; X-ray diffraction
- 摘要：Utilizing the raw materials of TiOSO4, NaOH, NH4NO3 and RDX, the TiO2 ultrafine particles were prepared under high pressure and high temperature by detonation method. The structure, composition and size distribution of the TiO2 ultrafine particles were systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicated the as-prepared TiO2 ultrafine particles exhibited spherical-like grains and that the average size of particles was 25 +/- 5 nm. After being heated at 700 degrees C for 1 h, TiO2 particles have entirely completed the anatase-rutile phase transition, which means that detonation method can effectively enhance the anatase-rutile phase transition by lowering the transition temperature. The size of TiO2 nanoparticles can be effectively controlled because the as-prepared nanoparticles do not have enough time to grow to large and perfect crystallites during the detonation process. (c) 2007 Elsevier Ltd. All rights reserved.
