Abstract

The viscosity of potassium–boron melts is measured in the temperature range 918–1699 K using a vibrational viscosimeter. The content of potassium oxide is varied from 0.74 to 28.46 mol %. The parameters of the viscous flow in melts (the configuration–activation energy(ε_h) and the shifting energy of the bridging oxygen atoms’ bonds (U_∞)) using the configuration–activation model are calculated for two temperature intervals 918–1400 K and 1400–1699 K. The glass transition temperature (T_g) is measured by differential scanning calorimetry (DSC) and the concentration dependence of the glass transition temperature on the content of potassium oxide in the melt is shown.

中文翻译：

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钾硼 K2O–B2O3 熔体的粘度、自由活化能和玻璃化转变温度

摘要

使用振动粘度计在 918–1699 K 的温度范围内测量钾硼熔体的粘度。氧化钾的含量在0.74至28.46mol%之间变化。使用构型活化模型计算了两个温度区间 918–1400 K 的熔体粘性流动参数（构型活化能 (ε _h ) 和桥接氧原子键的位移能 (U _∞ )） 1400–1699 K。通过差示扫描量热法 (DSC) 测量玻璃化转变温度 ( T _{g )，并显示玻璃化转变温度对熔体中氧化钾含量的浓度依赖性。}