PREPARATION OF MONOLITHIC SIO2-TIO2 GELS BY CONDENSATION POLYMERIZATION OF SILICIC-ACID AND TITANIUM CHELATES

被引：56

作者：

ABE, Y

SUGIMOTO, N

NAGAO, Y

MISONO, T

机构：

[1] Science Univ of Tokyo, Japan

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1988年 / 104卷 / 2-3期

关键词：

Acids - Glass - Polymerization - Titanium Oxides;

D O I：

10.1016/0022-3093(88)90384-5

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 preparation of monolithic gels as a precursor for SiO2-TiO2 glasses via polytitanosiloxanes was investigated. The gels were obtained from polytitanosiloxanes formed by condensation polymerization of titanium chelates and silicic acids. Silicic acid was extracted with tetrahydrofuran from an aqueous sodium metasilicate solution neutralized with hydrochloric acid. Titanium chelates used were bis(acetylacetonato)titanium diisopropoxide (ATP) and bis(ethyl acetoacetato)titanium diisopropoxide (ETP). Monolithic gels with a TiOx content of less than 20 mol% were formed by the reaction of silicic acid with ATP, whereas the reaction with ETP provided transparent monolithic SiO2-TiO2 gels of 5.7-94 mol% TiO2. Heat treatment of the gel gave monolithic SiO2-TiO2 glass.

引用

页码：164 / 169

页数：6

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[11] SOL-GEL TRANSITION IN ZIRCONIA SYSTEMS USING PHYSICAL AND CHEMICAL PROCESSES [J].