✦ LIBER ✦

Preparation, Characterization, and Low-Temperature Heat Capacities of Nanocrystalline TiO2 Ultrafine Powder

✍ Scribed by Xin-Ming Wu; Lan Wang; Zhi-Cheng Tan; Guang-Hai Li; Song-Sheng Qu

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 127 KB
Volume: 156
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.2000.8991

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✦ Synopsis

Nanocrystalline TiO 2 ultra5ne powders with di4erent grain sizes have been prepared by the sol+gel method. The grain sizes and the crystalline phases have been determined. Heat capacities in the temperature range of 78+370 K have also been measured, and the polynomial equations expressing the change of heat capacity with temperature were 5tted. The obtained values of the heat capacity have been compared with those of the bulk crystal from the literature. The relations between heat capacity and the grain size of nanocrystalline TiO 2 have been discussed in terms of energy.

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