CHARACTERIZATION OF VARIOUS STAGES OF THE SOL-GEL PROCESS

被引:116
作者
ORGAZ, F [1 ]
RAWSON, H [1 ]
机构
[1] UNIV SHEFFIELD,DEPT CERAM GLASSES & POLYMERS,SHEFFIELD S10 2TN,S YORKSHIRE,ENGLAND
关键词
CERAMIC MATERIALS - Sintering - DIFFERENTIAL THERMAL ANALYSIS - SILICA GEL - Processing - SOLUTIONS - Viscosity - SPECTROSCOPY; INFRARED;
D O I
10.1016/0022-3093(86)90111-0
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
Monolithic samples of silica and cobalt-doped silica glasses were prepared from the hydrolysis-gelling process of TEOS in ethanol solution. Cobalt was used as a 'color indicator'. The sol-gel transition was studied by measuring the specific and intrinsic viscosities of the solution. The gel-glass transition was studied by infrared spectroscopy, TGA, DTA, density and BET measurements. The experiments indicate that the hydrolysis-gelling process is somewhat similiar to that of polycondensation of silicic acid and some degree of ordering must be present in the silica particles formed.
引用
收藏
页码:57 / 68
页数:12
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