Effect of Bi2O3 content on sintering and crystallization behavior of low-temperature firing Bi2O3-B2O3-SiO2 glasses

Glasses of composition 35-60 mol% Bi2O3, 10-35 mol% B2O3, 30 mol% SiO2 were prepared by fusing mixtures of Bi2O3, H3BO3 and SiO2 at 1100 C followed by quenching. The glasses were ball milled and characterised by determinations of crystalline phase composition, density and glass transition temperatur...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2007, Vol.27 (2-3), p.819-824
Main Authors: KIM, Byung-Sook, LIM, Eun-Sub, LEE, Joon-Hyung, KIM, Jeong-Joo
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Glasses
Structure, analysis, properties
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Summary:Glasses of composition 35-60 mol% Bi2O3, 10-35 mol% B2O3, 30 mol% SiO2 were prepared by fusing mixtures of Bi2O3, H3BO3 and SiO2 at 1100 C followed by quenching. The glasses were ball milled and characterised by determinations of crystalline phase composition, density and glass transition temperature. Isostatically-pressed specimens were sintered at temperatures of 430-470 C and characterised by density measurements and fracture surface studies. The glass transition and crystallisation temperatures decreased with increasing Bi2O3 content. Large pores formed in the glass containing 40 mol% Bi2O3 when over-fired. This effect was not observed in the glass containing 45 mol% Bi2O3, due to crystallisation during sintering. The crystallisation temperature of the glasses containing 50-55 mol% Bi2O3 was lower than the glass transition temperature, which impeded densification. 23 refs.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2006.04.013