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- Title
Structure and properties of ZnO-BaO-Bi<sub>2</sub>O<sub>3</sub>-B<sub>2</sub>O<sub>3</sub> glasses for low temperature sealing applications.
- Authors
Zhuohao Xiao; Yunzhi Wang; Runlin Han; Minhua Luo
- Abstract
ZnO-BaO-Bi2O3-B2O3 glasses for low temperature sealing applications have been prepared using the conventional melt quenching technique. The effects of Bi2O3/B2O3 ratio on the glass structure and properties have been systematically investigated using Fourier transform infrared (FT-IR) spectroscopy, x-ray photoelectron spectroscopy (XPS) and physical measurements. The FT-IR and XPS spectra show that the glass network is mainly constituted by [BO3], [BiO3] and [BiO6]. With increasing Bi2O3/B2O3 ratio, the relative fraction of bridging oxygen (BO) decreases gradually, whereas the concentration of Bi3+ increases compared to Bi5+ in the glasses. Accordingly, the bulk density, glass transition temperature (Tg) and softening temperature (Ts) increase, coefficient of thermal expansion (CTE), bend strength and Vickers hardness decrease. The sealing experiment suggests that ZnO-BaO-Bi2O3-B2O3 glasses area potential matched sealing material for Kovar 4J50 alloy.
- Subjects
ZINC oxide; LOW temperatures; QUENCHING (Chemistry); FOURIER transforms; THERMAL expansion; GLASS transitions
- Publication
Glass Technology: European Journal of Glass Science & Technology Part A, 2016, Vol 57, Issue 1, p20
- ISSN
1753-3546
- Publication type
Article
- DOI
10.13036/1753-3546.57.1.015