Preparation of stabilized nanosized tin oxide particles by hydrothermal treatmen

2019-11-02 12:41:51

treatment SnO2 TiN powder oxide

责任者: Nam Seok Baik;Sakia, G.;Miura, N.;Yamazoe, N. 单位: Dept. of Molecular & Mater. Sci., Kyushu Univ., Fukuoka, Japan 来源出处: Journal of the American Ceramic Society(J. Am. Ceram. Soc. (USA)),2000/12/,83(12):2983-7 摘要: Stable colloidal suspensions of tin oxide (content 0.9-6.1 wt%) were synthesized by subjecting conventionally prepared tin oxide gels to hydrothermal treatment with an ammonia solution (pH 10.5) at 200°C for 3 h in an autoclave. Based on X-ray diffractometry analyses, the tin oxide crystallites after hydrothermal treatment were resistant to thermal growth at elevated temperatures, and this feature became more conspicuous as the tin oxide content of the colloidal suspension decreased. For the powder derived from a 1.8 wt% colloidal suspension, for example, the mean sizes of the tin oxide crystallites were 7.5 and 13 nm after calcination at 600° and 900°C, respectively, in comparison with corresponding values of 13.5 and 29 nm for the untreated gel-derived powder. Thin film spin-coated from the same suspension had good uniformity, packed with tin oxide grains (crystallites) of a mean size of 6 nm after calcination at 600°C. Optical determination of the tin oxide sol particle size, as well as gravimetric analysis of the dehydration from the powder samples, were conducted to determine effects of hydrothermal treatment 关键词: colloids;crystallites;heat treatment;liquid phase deposited coatings;nanostructured materials;particle size;pH;powder technology;sol-gel processing;suspensions;thin films;tin compounds;X-ray diffraction;stable colloidal suspensions;stabilized nanosized SnO2 particles;preparation;hydrothermal treatment;pH;NH3 solution;autoclave;X-ray diffractometry analyses;SnO2 crystallites;thermal growth;colloidal suspension;SnO2 content;calcination;untreated gel-derived powder;SnO2 grain;optical determination;SnO2 sol particle size;gravimetric analysis;dehydration;powder samples;200 degC;3 h;600 degC;SnO2;NH3