Preparation of nanometer δ- and β-bismuth trioxide by vacuum vapor-phase oxidation

来源期刊:中国有色金属学报(英文版)2006年第1期

论文作者:胡汉祥 丘克强 徐国富

文章页码:173 - 177

Key words:δ- bismuth trioxide; β-bismuth trioxide; vacuum vapor-phase oxidation; nanometer particles

Abstract:

Abstract: A stable δ- and β-bismuth trioxide was prepared at room temperature by vacuum vapor-phase oxidation. The average crystal size of products was 14.6 nm (by XRD), the d(0.5) value was in the range from 62 nm to 69 nm, and geometric standard deviation(GSD) was from 1.42 to 1.64. The results show that δ-Bi2O3 is formed when quenching rates is rapid and β-Bi2O3 is formed when it is slow. The size of grains increases with rising reaction temperature, flow rate of carrier gas, residual pressure of system and longer growing time of grains.

基金信息:the Bureau of Science and Technology of Hunan Province, China
the Bureau of Education of Hunan Province, China

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