Synthesis and characterization of strontium and barium bismuth borate glass-ceramics

Glass ceramics in the 20MO.55Bi2O3.25B2O3 (M=Sr, Ba) system were prepared by conventional melt quenching method, followed by heat treatment. XRD patterns show that the crystalline phase boron sillenite (Bi24B2O39) was formed on thermal treatment. The variation in the microstructure of the sample as...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2014-03, Vol.388, p.68-74
Main Authors: Rejisha, S.R., Anjana, P.S., Gopakumar, N., Santha, N.
Format: Article
Language:English
Subjects:
Boron sillenite
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Dielectric loss and relaxation
Dielectric properties
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
FT-Raman & FT-IR spectroscopy
Glass ceramics
Glasses (including metallic glasses)
Growth from solid phases (including multiphase diffusion and recrystallization)
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Solid-solid transitions
Specific materials
Specific phase transitions
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Summary:Glass ceramics in the 20MO.55Bi2O3.25B2O3 (M=Sr, Ba) system were prepared by conventional melt quenching method, followed by heat treatment. XRD patterns show that the crystalline phase boron sillenite (Bi24B2O39) was formed on thermal treatment. The variation in the microstructure of the sample as a function of crystallization temperature was studied using scanning electron microscopy. The structural changes due to heat-treatment of the glasses have been explained on the basis of the changes in FT-IR and FT-Raman spectra. The glass ceramics in the present study have relatively high dielectric constant and low dielectric loss. •Bi24B2O39 crystalline phase have been prepared in the 20MO.55Bi2O3.25B2O3 (M=Sr, Ba) glass system.•The formation of BiO3 units is favored during the conversion of glass into glass ceramics.•The glass ceramics prepared have high dielectric constants and low dielectric loss.
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2014.01.037