文献类型：期刊文献

英文题名：Structural investigation of some important Chinese diatomites

作者：Wang Zhi-Ying[1];Zhang Li-Ping[2];Yang Yu-Xiang[2]

机构：[1]Zhejiang Forestry Coll, Sch Nat Sci, Linan 311300, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2009

卷号：35

期号：6

起止页码：673

外文期刊名：GLASS PHYSICS AND CHEMISTRY

收录：;EI(收录号：20100412658264);WOS:【SCI-EXPANDED(收录号:WOS:000273400000017)】；

基金：This study was supported by the National Natural Science Foundation of China (project nos. 20577010 and 20971043) and performed within the framework of the Open Project Program of the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of the Jilin University.

语种：英文

外文关键词：Silica - Aluminum compounds - Silicate minerals

摘要：The structure of some important diatomites has been investigated systematically. It has been revealed that the Zhejiang white soil contains bound, isolated, and neighboring hydroxyl groups and that other diatomites involve hydroxyl groups of two types, i.e., isolated and neighboring hydroxyl groups. The IR spectra exhibit bands associated with the Si-O and Al-O bonds. The acid treatment and calcination lead to a change in the size, size distribution, and structure of pores. The calcination results in a change in the diatomite structure, the removal of free water, and a decrease in the content of bound water. Upon calcination at a temperature of 1150A degrees C, amorphous silica constituting the diatomite crystallizes into alpha-cristobalite. The Jilin diatomite has primary pores, the Yunnan diatomite has tertiary pores, and the other diatomites have secondary pores.