"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Influence of CaO addition on the structure and properties of the glasses in the SiO2-PbO-Na2O system

M. ZAHARESCU1,* , O. C. MOCIOIU1, C. ANDRONESCU1

Affiliation

  1. Institute of Physical Chemistry Ilie Murgulescu, Romanian Academy, Splaiul Independentei 202 Bucharest, Romania

Abstract

The lead silicate glasses are interesting for their potential use in optics, electronics, waste inertization, etc. The present work, studies the influence of CaO addition to glasses in the ternary SiO2-PbO-Na2O. The melting behaviour of the selected glasses was determined by high temperature microscopy. The structure of glasses was examined by X-ray diffraction and IR spectroscopy. X-ray patterns show that all samples are in vitreous states and the IR spectroscopy puts in evidence different structural ordering depending on the composition of the glasses. In order to establish their thermal behaviour and hydrolytic stability the DTA measurements and ISO 719/1996 tests were performed. The thermal properties of glasses have shown the vitreous transitions and glass crystallization tendency depending on the amount of CaO in the composition. All quaternary glasses show good chemical stabilities. The results of the mentioned investigations were correlated in order to establish the influence of the CaO addition on the structure, thermal behaviour and hydrolytic stability of the glasses..

Keywords

Lead oxide glasses, IR spectroscopy, Thermal analysis, Chemical stability tests.

Submitted at: May 15, 2008
Accepted at: June 9, 2008

Citation

M. ZAHARESCU, O. C. MOCIOIU, C. ANDRONESCU, Influence of CaO addition on the structure and properties of the glasses in the SiO2-PbO-Na2O system, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 6, pp. 1315-1319 (2008)