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氧化物添加对Bi2O3–B2O3–ZnO低熔点玻璃结构与性能的影响

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Abstract:

采用常规的熔体冷却法制备了以Bi2O3–B2O3–ZnO为基体,外加氧化物(SiO2、GeO2、TeO2和Sb2O5)的玻璃试样,对比研究了氧化物对玻璃结构、转变温度、软化温度、析晶温度、热膨胀系数、抗弯强度和化学稳定性的影响规律。结果表明在基体中加入SiO2,对降低玻璃的热膨胀系数最有效;加入TeO2,对降低玻璃的转变温度和软化温度最有效;加入Sb2O5,不仅能降低玻璃的转变温度和软化温度,使ΔT最大,而且能改善铋酸盐玻璃在封接过程中易析晶的问题,热膨胀系数较低,抗弯强度最大,化学稳定性最好。通过利用Fourier红外光谱、X射线衍射和热分析研究了玻璃结构的变化。

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