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

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.

Keywords

ZnO−Bi₂O₃−B₂O₃ system glasses / viscosity / sintering / wetting

References

[1] HongJ-h, ZhaoD-s, GaoJ-f, HeM-z, LiH-f, HeGang. Lead-free low-melting point sealing glass in SnO-CaO-P₂O₅ system [J]. Journal of Non-Crystalline Solids, 2010, 356: 1400-1403

[2] ReisS T, PascualM J, BrowR K, RayC S, ZhangT. Crystallization and processing of SOFc sealing glass [J]. Journal of Non-Crystalline Solids, 2010, 356: 3009-3012

[3] ArdeleanI, CoraS, RusuD. EPR and FT-IR spectroscopic studies of Bi₂O₃-B₂O₃-CuO glasses [J]. Physics B, 2008, 403: 3682-3685

[4] ShashidharBALE, SyedRAHMAN, AwasthiA M, SatheV. Role of Bi₂O₃ content on physical, optical and vibrational studies in Bi₂O₃-ZnO-B₂O₃ glasses [J]. Journal of Alloys Compdounds, 2008, 460: 699-703

[5] KimB S, LimE S, LeeJ H, KimJ J. Effect of Bi₂O₃ content on sintering and crystallization behavior of low-temperature firing Bi₂O₃-ZnO-B₂O₃ glasses [J]. Journal of Europe Ceramics Society, 2007, 27: 819-824

[6] HeF, ChengJ-s, DengD-w, WangJun. Structure of Bi₂O₃-ZnO-B₂O₃ system low-melting sealing glass [J]. Journal of Central South University Technology, 2010, 17(2): 257-262

[7] ChengY, XiaoH N, GuoW M, GuoW M. Structure and crystallization kinetics of Bi₂O₃-B₂O₃ glasses [J]. Thermochimica Acta, 2006, 444: 173-178

[8] FanH-y, WangG-n, HuL-li. HYPERLINK infrared, Raman and XPS spectroscopic studies of Bi₂O₃–B₂O₃–Ga₂O₃ glasses [J]. Solid State Sciences, 2009, 11(12): 2065-2070

[9] BaiL C, StefanR, KieferW, PoppJ, SimonS. Structural investigations of copper doped B₂O₃-Bi₂O₃ glasses with high bismuth oxide content [J]. Journal of Non-Crystalline Solids, 2002, 303(3): 379-386

[10] Shashidhar BaleN, RaoS, RahmanS. Spectroscopic studies of Bi₂O₃-Li₂O-ZnO-B₂O₃ glasses [J]. Solid State Science, 2008, 10: 326-331

[11] KirdsiriK, KaewkhaoJ, ChanthimaN, LimsuwanP. Comparative study of silicate glasses containing Bi₂O₃, PbO and BaO: Radiation shielding and optical properties [J]. Annals of Nuclear Energy, 2011, 38(6): 1438-1441

[12] BaoR Q, BustaC M, SuX F, TomozawaM, ChriseyD B. Microstructures, phases, and properties of low melting BaO-B₂O₃-ZnO glass films prepared by pulsed laser deposition [J]. Journal of Non-Crystalline Solids, 2013, 371-372: 28-32

[13] HeF, WangJ, DengD-wei. Effect of Bi₂O₃ on structure and wetting studies of Bi₂O₃-ZnO-B₂O₃ glasses [J]. Journal of Alloys Compounds, 2011, 509: 6332-6336

[14] WangM-t, ChengJ-shu. Viscosity and thermal expansion of rare earth containing soda–lime–silicate glass [J]. Journal of Alloys Compounds, 2010, 504: 273-276

[15] GrylordS, TincherB, PetitL, RichaedsonK. Viscosity properties of sodium borophosphate glasses [J]. Materials Research Bulletin, 2009, 44: 1031-1035

[16] StriepeS, DeubenerJ. Viscosity and kinetic fragility of alkaline earth zinc phosphate glasses [J]. Journal of Non-Crystalline Solids, 2012, 358: 1480-1485

[17] HrmaP, HansS. Effect of glass composition on activation energy of viscosity in glass-melting-temperature range [J]. Journal of Non-Crystalline Solids, 2012, 358: 1818-1829

[18] HrmaP. Glass viscosity as a function of temperature and composition: A model based on Adam–Gibbs equatio [J]. Journal of Non-Crystalline Solids, 2008, 354(18): 1962-1968

[19] TakeuchiA, KatoH, InoueA. Vogel–Fulcher–Tammann plot for viscosity scaled with temperature interval between actual and ideal glass transitions for metallic glasses in liquid and supercooled liquid states [J]. Intermetallics, 2010, 18(4): 406-411

[20] AvramovI, MilchevA. Effect of disorder on diffusion and viscosity in condensed systems [J]. Journal of Non-Crystalline Solids, 1988, 104(2/3): 253-260

[21] ShihP Y, ChinT S. Preparation of lead-free phosphate glasses with low Tg and excellent chemical durability [J]. Journal of Materials Science Letter, 2001, 20: 1811-1813

[22] ZhaoG-y, TianY, FanH-y, ZhangJ-j, HuL-li. Properties and structures of Bi₂O₃-B₂O₃-TeO₂ glass [J]. Journal of Materials Science Technology, 2013, 29: 209-214

[23] HeF, DengD-w, WangJun. Effect of Bi₂O₃ Contents on sintering property of Bi₂O₃-ZnO-B₂O₃ system low-melting electronic sealing glass [J]. Journal of Wuhan University of Technology, 2009, 31(22): 33-35