Blackwell Publishing Journal Backfiles 1879-2005
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
The rapid hydrolysis of some alkoxides creates problems in alcohol-based sol–gel processes. This paper describes a simple aqueous sol–gel process for the synthesis of barium aluminosilicate gels and gel-derived glasses, in which the problem of the rapid hydrolysis of aluminum isopropoxide (the source of aluminum) is solved by a precipitation–peptization process that is cost effective. Tetraethylorthosilicate, aluminum isopropoxide, and barium acetate are used as the starting materials, and water is the solvent. The molecular network, crystallization behavior, weight-loss, and thermal characteristics of the gel and the gel-derived glass have been detected by Raman spectroscopy, XRD, DTA, and TGA.
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