Fe2O3对Bi2O3-B2O3-ZnO系统封接玻璃结构及性能的影响

摘要

采用熔融冷却的方法制备了(40–x)Bi2O3-30B2O3-30ZnO-xFe2O3(0≤ x ≤10)系统玻璃。研究了Fe2O3取代Bi2O3对Bi2O3-B2O3-ZnO系统玻璃结构、玻璃化转变温度（tg）、初始析晶温度（tc）、热稳定性、热膨胀系数（α）及化学稳定性的影响。红外光谱(FTIR)结果表明，Fe2O3以网络修饰体存在于玻璃结构间隙，增强了玻璃结构，玻璃密度减小。随着Fe2O3含量的增加，tg、tc逐渐升高，玻璃的热稳定性有所降低。α从8.2×10–6℃–1减小至7.4×10–6℃–1，玻璃的软化点（ts）逐渐从439℃升高到486℃。引入Fe2O3后，玻璃的化学稳定性提高。%(40–x)Bi2O3-30B2O3-30ZnO-xFe2O3 (0≤x≤10) glasses were prepared by melt-quenching method. The effect of the substitution of Fe2O3 for Bi2O3 on the structure, transition temperature(tg), crystallization temperature(tc), thermal stability, chemical stability, and coefficient of thermal expansion of glasses were investigated. The Fourier transform infrared spectroscopy (FTIR) result reveal that Fe2O3 acts as network modifier in the network structure of Bi2O3-B2O3-ZnO-Fe2O3 glasses, which strengthens the glass structure and decrease the density. Thermal stability of the glass decrease with increasing Fe2O3 contents, whereas the tendencies of the tg and tc vary contrarily. The coefficient of thermal expansion decrease from 8.2×10–6℃–1 to 7.4×10–6℃–1 and the soft temperature increases from 439℃ to 486℃. Chemical stability is improved when Bi2O3 is substituted by Fe2O3.