RHEOLOGICAL BEHAVIOR OF SOLUTIONS AFFORDING SIO2 AND SIO2/ZRO2 FIBERS

被引：4

作者：

BRENNA, U ^{[1
]}

CARTURAN, G ^{[1
]}

SORARU, GD ^{[1
]}

机构：

[1] UNIV TRENTO,DEPT MAT ENGN,I-38050 TRENT,ITALY

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1991年 / 134卷 / 03期

关键词：

D O I：

10.1016/0022-3093(91)90376-H

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：

The rheological behaviour of solutions composed of silicon ethoxide (TEOS) or of TEOS and zirconium propoxide (TPOZ) in various ratios are studied as a function of hydrolysis conditions, concentration of acetylacetone, addition of dimethyldiethoxysilane (DEDMS) and nature of solvent, In all cases hydrolysis is carried out under acid catalysis; addition of stoichiometric H2O is performed by gentle bubbling of vapour into the solution. Appropriate choice of the acetylacetone/ZrO2 ratio can homogenize rheological behaviour, which appears almost independent of the SiO2/ZrO2 nominal ratios. Viscosity versus time trends are discussed in terms of advance of the condensation reaction among silicic oligomeric species. The effectiveness of DEDMS in prolonging spinnability time is presented and discussed.

引用

页码：191 / 198

页数：8

共 39 条

[1]

[Anonymous], 1979, CHEM SILICA

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