Effect of m(ZnO)/m(B2O3) Mass Ratio on Structure, Properties and  Wettability of Low Melting Point Sealing Glass Bi2O3-B2O3-ZnO

Abstract

Abstract: Aiming at the performance requirements of vacuum glass sealing, a bismuth-based amorphous lead-free glass powder for vacuum glass sealing was prepared by high temperature melting method. The effects of m(ZnO)/m(B₂O₃) mass ratio on network structure, characteristic temperature, coefficient of thermal expansion and sealing temperature of Bi₂O₃-B₂O₃-ZnO glass were studied by high temperature X-ray diffraction, powder X-ray diffraction, Raman spectroscopy, differential scanning calorimeter, thermal expansion test and scanning electron microscope. The results show that increasing m(ZnO)/m(B₂O₃) mass ratio can promote the transformation of zinc-oxygen polyhedron from [ZnO₄] to [ZnO₆], resulting in a decrease in the coefficient of thermal expansion and an increase in the characteristic temperature. When m(Bi₂O₃) ∶m(B₂O₃) ∶m(ZnO) mass ratio is 80 ∶7 ∶13, the glass has lower glass transition temperature T_g (371 ℃) and expansion softening temperature T_f (401 ℃), the coefficient of thermal expansion is 9.3×10^-6 ℃^-1, and the sealing temperature is 450 ℃, which can meet the requirements of vacuum glass sealing for low melting point sealing glass powder.

Key words: m(ZnO)/m(B₂O₃) mass ratio, characteristic temperature, Bi₂O₃-B₂O₃-ZnO glass, vacuum glass, sealing temperature, sealing glass powder

CLC Number:

TQ171

KANG Tao, XIONG Chunrong, FU Youjie, CAI Banghui, WEI Shuguang, LI Junge, JIANG Hong. Effect of m(ZnO)/m(B₂O₃) Mass Ratio on Structure, Properties and Wettability of Low Melting Point Sealing Glass Bi₂O₃-B₂O₃-ZnO[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(4): 1341-1349.

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Effect of m(ZnO)/m(B₂O₃) Mass Ratio on Structure, Properties and Wettability of Low Melting Point Sealing Glass Bi₂O₃-B₂O₃-ZnO

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