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中南大学学报(英文版)

Journal of Central South University

Vol. 23    No. 7    July 2016

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Melting, sintering and wetting properties of ZnO–Bi2O3–B2O3 sealing glass
HE Feng(何峰)1, HE Zi-jun(何子君)2, XIE Jun-lin(谢峻林)1, 3, MEI Shu-xia(梅书霞)3, JIN Ming-fang(金明芳)3

1. State Key Laboratory of Silicate Materials for Architectures (Wuhan University of
Technology), Wuhan 430070, China;
2. Department of Materials Engineering, Monash University, VIC 3800, Australia;
3. Material Research and Test Center, Wuhan University of Technology, Wuhan 430070, China

Abstract:Glasses based on ZnO-Bi2O3-B2O3 system are expected to be a new kind of sealing glasses because of their low melting temperature and other properties. In order to reveal the effect of B2O3 on the rheological behavior of ZnO-Bi2O3-B2O3 system glass melt, the properties of viscosity, thermal expansion, fluxion property and wetting process between cylinder samples and stainless steel were investigated with the rotating crucible viscometer, dilatometer and high-temperature microscope. The structure of sintered glass samples was investigated with scanning electron microscope. The results show that the B2O3 content increasing in B1-B3 at the given temperature between 400 °C and 500 °C leads to the increasing of the sample viscosity. When the amount of B2O3 increases from 5.24% to 9.24% (mass fraction), the coefficients of thermal expansion of glass samples decrease smoothly from 10.94×10-6 to 10.71×10-6 and 10.38×10-6 °C-1 respectively. In the case of sealing temperature, its value increases from 453 °C to 494 °C. ZnO-Bi2O3-B2O3 system low-melting glass powder sintering was with viscous liquid to participate, which could make the densification of glass sample more effective and more efficient. With the content of B2O3 increasing, the wetting angle between the glasses samples and stainless steel could also increase, and the resulting appropriate sealing temperature range is 460-490 °C.

 

Key words: ZnO-Bi2O3-B2O3 system glasses; viscosity; sintering; wetting

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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