Abstract
Lead bismuth titanate borosilicate glasses were prepared in the glass system 65[(PbxBi1-x)·TiO3]-34[2SiO2·B2O3]-1La2O3(0.0≤x≤1.0) doped with one mole percent ofLa2O3via conventional melt quench method. The amorphous nature of glass samples in this glass system is confirmed by using X-ray diffraction (XRD) study. Differential thermal analysis (DTA) has been employed to determine the glass transition temperature,Tg, as well as crystallization temperature,Tc. DTA measurements were recorded in temperature range from 30 to 1200°C. The prepared glasses were crystallized by regulated controlled heat treatment process on the basis of their DTA results. These samples are carried out for XRD measurements in the 2θrange from 20 to 80° to study the crystallization behaviour and phase formation of the glass ceramic samples. The scanning electron microscopy (SEM) of these glass ceramic samples has been carried out to explore the morphology through nucleation and growth of the crystallites in the glassy matrix. The values of dielectric constant as well as dielectric loss were increased with increasing the temperature within the frequency range from 20 Hz to 100 Hz. The addition of 1 mol% ofLa2O3to the lead bismuth titanate glasses enhances the crystallization and acts as donor dopant for this glass system.
Highlights
Glasses are defined as inorganic product of fusion which has been cooled to a rigid condition without crystallization [1]
Lead bismuth titanate (PBT) borosilicate glasses are analogous to the perovskite lead strontium titanate glass ceramics
The glass ceramics of these systems were developed with the objective of producing materials for the electronic industry with high dielectric constants or optoelectronic effects
Summary
Glasses are defined as inorganic product of fusion which has been cooled to a rigid condition without crystallization [1]. The study of various oxide glasses has received considerable attention due to their structural property [3, 4]. These glasses have wide application in the field of electronics, nuclear, and solar energy technologies and acoustic-optics device [5,6,7,8,9]. Bismuth based glasses are used to produce glass ceramic superconductors (high Tc) with controllable microstructure [23,24,25,26,27,28].
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