The effect of ZrO2 in 30K2O-70SiO2 glass:: a comparison with 30Li2O-70SiO2

被引：6

作者：

Barbieri, L ^{[1
]}

Corradi, A ^{[1
]}

Lancellotti, I ^{[1
]}

Leonelli, C ^{[1
]}

Siligardi, C ^{[1
]}

机构：

[1] Univ Modena & Reggio Emilia, Dipartimento Ingn Mat & Ambiente, I-41100 Modena, Italy

来源：

JOURNAL OF MATERIALS SCIENCE | 2003年 / 38卷 / 12期

关键词：

Composition - Crystallization - Differential thermal analysis - Electric conductivity - Fourier transform infrared spectroscopy - Glass - Glass transition - pH effects - Refractive index - Silica;

D O I：

10.1023/A:1024430501632

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The influence of the introduction of ZrO2 in concentrations of up to 5 mol% into a 30K(2)O-70SiO(2) base glass composition has been investigated with the aid of differential thermal analysis (DTA), FT-IR spectroscopy, as well as chemical durability tests (pH, conductivity and AES-Inductively Coupled Plasma measurements) and refraction index determination. Several differences have been found by comparison with similar compositions belonging to the Li2OZrO2SiO2 system. The higher ionic radius and the lower field strength of K+ with respect to Li+ is responsible for higher stability towards crystallisation and lower chemical durability. Moreover, even though Zr4+ increases glass polymerisation (higher glass transition temperature, chemical durability and refraction index), the presence of high water content as highlighted by spectroscopy measurements, seems to weaken the glass structure. (C) 2003 Kluwer Academic Publishers.

引用

页码：2627 / 2631

页数：5

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