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Effects of ZnO and cordierite contents on the wetting properties of a Bi2O3–ZnO–B2O3 glass composite as a low-melting sealing glass

Effects of ZnO and cordierite contents on the wetting properties of a Bi2O3–ZnO–B2O3 glass... The wetting properties of Bi2O3–ZnO–B2O3 glass composite materials with different ZnO and cordierite contents were investigated upon melting them and thermally treating them at 1300 °C and 430 °C, respectively. The density of a 48%Bi2O3–24%ZnO–22% B2O3 glass composite was 7.30 g/cm3, which is 99.3% of its theoretical density; its glass softening temperature was 413.2 °C. The addition of cordierite improved the adhesion of the glass by acting as a filler, thus lowering its coefficient of thermal expansion. Specifically, by adding 0–15% cordierite, the coefficient of thermal expansion of the Bi2O3–ZnO–B2O3 glass was reduced from 10.6 × 10–6 to 7.5 × 10–6 /K. X-ray diffraction and transmission electron microscopy studies confirmed that the glass was not crystallized, but rather a composite. This study demonstrates that the Bi2O3–ZnO–B2O3 glass composite developed herein is an environment-friendly lead-free material that can be sintered at 430 °C without losing its tempered glass function; therefore, this material shows promise for applications in architecture, electronic devices, and home appliances. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Korean Ceramic Society Springer Journals

Effects of ZnO and cordierite contents on the wetting properties of a Bi2O3–ZnO–B2O3 glass composite as a low-melting sealing glass

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References (24)

Publisher
Springer Journals
Copyright
Copyright © The Korean Ceramic Society 2022
ISSN
1229-7801
eISSN
2234-0491
DOI
10.1007/s43207-021-00182-w
Publisher site
See Article on Publisher Site

Abstract

The wetting properties of Bi2O3–ZnO–B2O3 glass composite materials with different ZnO and cordierite contents were investigated upon melting them and thermally treating them at 1300 °C and 430 °C, respectively. The density of a 48%Bi2O3–24%ZnO–22% B2O3 glass composite was 7.30 g/cm3, which is 99.3% of its theoretical density; its glass softening temperature was 413.2 °C. The addition of cordierite improved the adhesion of the glass by acting as a filler, thus lowering its coefficient of thermal expansion. Specifically, by adding 0–15% cordierite, the coefficient of thermal expansion of the Bi2O3–ZnO–B2O3 glass was reduced from 10.6 × 10–6 to 7.5 × 10–6 /K. X-ray diffraction and transmission electron microscopy studies confirmed that the glass was not crystallized, but rather a composite. This study demonstrates that the Bi2O3–ZnO–B2O3 glass composite developed herein is an environment-friendly lead-free material that can be sintered at 430 °C without losing its tempered glass function; therefore, this material shows promise for applications in architecture, electronic devices, and home appliances.

Journal

Journal of the Korean Ceramic SocietySpringer Journals

Published: Mar 1, 2022

Keywords: Bi2O3–ZnO–B2O3 glass; Cordierite; Thermal properties; Wettability; Sealing material

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