Modulated DSC and fragility studies on diborate glasses containing heavy metal ion

Author

Reddy, M. Sudhakara ; Rajiv, A. ; Vishwanatha, R. ; Reddy, C. Narayana

Author_Institution

Dept. of Phys., Jain Univ., Bangalore, India

fYear

2013

fDate

27-28 Sept. 2013

Firstpage

1

Lastpage

4

Abstract

Glasses in a wide range of compositions in the system xPbO - (100-x) Na₂B₄O₇ (10 S × ≥ 50) have been prepared and characterized using XRD and modulated differential scanning calorometry(DSC). Quantitative correlations are established between fragility, glass transition temperature and structure. Addition of PbO causes a change in short range order of the diborate matrix. The modification of diborate network with the addition of PbO, results in the formation of B-O-Pb covalent linkages. Density, molar volume and glass transition temperature exhibit composition dependent trends. The fragility increases with increase in concentration of PbO. Analysis of the modulated DSC data reveals the investigated glasses are fragile.

Keywords

X-ray diffraction; borate glasses; differential scanning calorimetry; glass structure; glass transition; lead compounds; materials preparation; short-range order; sodium compounds; B-O-Pb covalent linkages; PbO-Na₂B₄O₇; X-ray diffraction; XRD; composition dependent trends; diborate glasses; diborate matrix; diborate network modification; fragility studies; glass structure; glass transition temperature; heavy metal ion; modulated DSC; modulated differential scanning calorimetry; molar volume; quantitative correlations; short-range order; Glass transition; diborate; modulated DSC; packing density;

fLanguage

English

Publisher

iet

Conference_Titel

Research & Technology in the Coming Decades (CRT 2013), National Conference on Challenges in

Conference_Location

Ujire

Electronic_ISBN

978-1-84919-868-4

Type

conf

DOI

10.1049/cp.2013.2556

Filename

6851603