The phase transformation behaviors of Sn2+-doped Titania gels

被引：45

作者：

Shi, Z. M. ^{[1
]}

Yan, L.

Jin, L.

Lu, X. M.

Zhao, G.

机构：

[1] Inner Mongolia Univ Technol, Sch Mat Sci & Engn, Hohhot 010051, Peoples R China

[2] Yulin Coll, Sch Chem & Chem Engn, Yulin 71900, Peoples R China

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2007年 / 353卷 / 22-23期

基金：

中国国家自然科学基金;

关键词：

transition metals; crystallization; ceramics; crystal growth; titanate; nanocrystals; X-ray diffraction; defects; powders; nanoparticles; titanates; sintering; aerogels; sol-gels (xerogels); solution chemistry; tin oxide;

D O I：

10.1016/j.jnoncrysol.2007.02.048

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The transformation behaviors of Sn2+ -doped titania gets, such as transformation temperature, conversion rate and the crystal granularity. were studied by using thermo-gravimetric/differential thermal analysis and X-ray diffraction methods. Experimental results show that, anatase, rutile and SnO2 phases can exist in the sintering products by varying Sn (2+) content and sintering temperature. Sn2+-doping greatly depresses the growth of anatase and rutile crystals and so obtaining nanosized crystals The transformation temperatures of gel to anatase and anatase to rutile first decrease and then increase with an increase of Sn2+ content, while both of the transformation rates are associated with Sn2+ content, change in its valence and the sintering temperature. It is suggested that by adjusting Ti4+/Sn4+ ratio and sintering temperature, the crystal granularity and the ratio of anatase to rutile can be tailored to optimize properties of TiO2-SnO2 humidity sensing ceramics. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：2171 / 2178

页数：8

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