Melting, sintering and wetting properties of ZnO–Bi2O3–B2O3 sealing glass

• Published in: Journal of Central South University Vol. 23; no. 7; pp. 1541 - 1547
• Main Authors: He, Feng, He, Zi-jun, Xie, Jun-lin, Mei, Shu-xia, Jin, Ming-fang
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.07.2016
• Subjects: Chemical and Environmental Engineering; Engineering; Materials; Metallic Materials; Metallurgy; B; viscosity; system glasses; wetting; sintering; ZnO−Bi; O
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-016-3206-x

Glasses based on ZnO−Bi 2 O 3 −B 2 O 3 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 B 2 O 3 on the rheological behavior of ZnO−Bi 2 O 3 −B 2 O 3 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 B 2 O 3 content increasing in B 1 −B 3 at the given temperature between 400 °C and 500 °C leads to the increasing of the sample viscosity. When the amount of B 2 O 3 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−Bi 2 O 3 −B 2 O 3 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 B 2 O 3 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.