STRUCTURAL EVOLUTION OF A POROUS TYPE-VI SOL-GEL SILICA GLASS

被引：16

作者：

ARAUJO, FG ^{[1
]}

LATORRE, GP ^{[1
]}

HENCH, LL ^{[1
]}

机构：

[1] UNIV FLORIDA,ADV MAT RES CTR,ALACHUA,FL 32615

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 185卷 / 1-2期

关键词：

D O I：

10.1016/0022-3093(94)00653-9

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 structural evolution of type-VI porous sol-gel-derived optical glasses is described. The average pore radius of the glasses studied is 30 Angstrom, with an exceptionally narrow pore size distribution. These glasses are particularly suited to laser surface densification. Their properties make them also attractive as matrices for impregnation of second phases and as a substrate material for the production of fully dense optical lens elements and micro-optical devices. The properties of the matrices are reported for the as-dried state to densities approaching 2.2 g/cm(3) with thermal treatments from room temperature to 1060 degrees C. The parameters of sintering for the gel-glass transformation are measured, and the phenomena occurring for three temperature ranges are evaluated. An activation energy of 65 +/- 9 kcal/mol for sintering with a structure factor n = 1.0 +/- 0.3 was found for the initial stage sintering of the material.

引用

页码：41 / 48

页数：8

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