In this work, the 30Bi₂O₃-38B₂O₃-3SiO₂-5Al₂O₃-(24-x)MnO-xCuO (x = 6, 10, 14, 18, 22 mol%) lead-free bismuth borate glasses were prepared by the melt-quenching method. The effects of CuO substitution for MnO on the structure and properties of the bismuth borate glass were investigated. As the CuO content increases from 6 to 22 mol%, the density of the glass gradually increases while the molar volume shows an opposite trend. The FTIR spectra show that [BiO₃], [BiO₆], [BO₃], and [BO₄] are the main structural units in the bismuth borate glass network. The vibrations of both [BiO₃] and [BO₄] units are enhanced with the increasing CuO content. With the increase of CuO content, the glass transition temperature (T_g) decreases from 438 to 417 ℃ and the softening temperature (T_f) decreases from 470 to 452 ℃. The thermal expansion coefficient (CTE) decreases from 7.875 to 7.702 × 10^–6 /℃ in the temperature range of 30–300 ℃, which is between the thermal expansion coefficients of Ag (19 × 10^–6 /℃) and silicon substrates (2.5 × 10^–6 /℃). In addition, the HF resistance of the bismuth borate glasses gradually improves as the CuO content increases, with a minimum dissolution rate of 14.27 × 10^–3 g cm⁻² min⁻¹. The NaOH resistance of the bismuth borate glasses initially decreases and then remains stable, with a maximum dissolution rate of 14.66 × 10^–3 g cm⁻² min⁻¹. The results revealed that the investigated Bi₂O₃-B₂O₃-MnO-CuO glass can be used as a suitable alternative to lead-based glass for conductive silver paste.

在这项工作中，30Bi ₂ O ₃ -38B ₂ O ₃ -3SiO ₂ -5Al ₂ O ₃ -(24-x)MnO-xCuO (x = 6, 10, 14, 18, 22 mol%) 无铅铋采用熔融淬火法制备硼酸盐玻璃。研究了CuO替代MnO对硼酸铋玻璃结构和性能的影响。随着CuO含量从6mol%增加到22mol%，玻璃的密度逐渐增加，而摩尔体积则呈现相反的趋势。FTIR光谱表明[BiO ₃ ]、[BiO ₆ ]、[BO ₃ ]和[BO ₄ ]是硼酸铋玻璃网络中的主要结构单元。_{[BiO 3} ]和[BO ₄ ]单元的振动随着CuO含量的增加而增强。随着CuO含量的增加，玻璃化温度( T _g )从438℃降低至417℃，软化温度( T _f )从470℃降低至452℃。在30~300 ℃温度范围内，热膨胀系数（CTE）从7.875降低到7.702×10 ^–6 /℃，介于Ag（19×10 –6 ^/ ℃）和硅基板（ 2.5×10-6 ^/ ℃）。此外，硼酸铋玻璃的耐高频性能随着CuO含量的增加而逐渐提高，最小溶解速率为14.27×10 –3 ^g  cm ^-2  min ^-1。硼酸铋玻璃的耐NaOH性能先下降后保持稳定，最大溶解速率为14.66×10 –3 ^g  cm ^-2  min ^-1。结果表明，所研究的Bi ₂ O ₃ -B ₂ O ₃ -MnO-CuO玻璃可以用作导电银浆中铅基玻璃的合适替代品。