Solid State Science and Technology, Vol. 20, No 1 & 2 (2012) 48-55

ISSN 0128-7389

48

THERMAL STABILITY AND PHYSICAL PROPERTIES OF

PbO-B2O3-TeO2 GLASS SYSTEM

 

Iskandar S.M.1,2,*, Halimah M.K.2, Daud W.M.2,

Sidek H.A.A.2 and Khairul Zaman M.D.3

1 School of Physics, Universiti Sains Malaysia,11800 USM, Pulau Pinang, Malaysia

2 Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

3 Radiation Processing Technology, Malaysian Nuclear Agency

43000 Kajang, Selangor, Malaysia

*Corresponding author: isshahrim@putra.upm.edu.my

 

 

ABSTRACT

The effect of composition on the thermal stability and structural of the PbO-B2O3-TeO2

glass has been studied. Homogeneous ternary (TeO2)y [(PbO)x (B2O3)1-x]1-y glass system

(x = 0.0 - 0.50 and y = 0.7) was prepared using a conventional melt-quenching method.

The density, the molar volume, XRD, and the glass transition temperatures of prepared

samples have been found to be compositional dependent. The increase of density and

decrease of molar volume narrate with the high dense of PbO which relate to the

constitution of the glass rather than the type of structural unit.The XRD result shows the

partially crystalline precipitation and fit the partially crystalline state as the amount of

PbO increases. From isothermal measurement, a criterion of Hruby´s value (KH) has

been used to evaluate glass stability. Ultimately, it is observed that the thermal stability

of lead-boro tellurite glass can be improved by increasing PbO in the glass composition.

Nevertheless, the increasing amount of PbO also indicates the escalating of glass system

rigidity. Raman spectrum indicates decreasing of O-Te-O and B-O-B bending shoulder

at approximately 450 cm-1 which ascribes the splitting of O-Te-O and B-O-B bonds and

hence, the bridging oxygen’s (BOs) were converted into NBOs.

 

Keywords: Raman spectra; Hruby’s value; partially crystalline glass

 

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