硼钾k20 - b2o3熔体粘度、自由活化能和玻璃化转变温度

IF 0.8 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS Glass Physics and Chemistry Pub Date : 2023-07-01 DOI:10.1134/S1087659623600102

A. A. Khokhryakov, M. A. Samoylova, V. V. Ryabov, L. B. Vedmid’, S. Yu. Mel’chakov

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引用次数: 0

摘要

用振动粘度计在918-1699 K的温度范围内测量了钾硼熔体的粘度。氧化钾的含量在0.74 ~ 28.46 mol %之间变化。在918 ~ 1400 K和1400 ~ 1699 K两个温度区间内，利用构型激活模型计算了熔体黏性流动参数(构型活化能εh和架桥氧原子键的移位能U∞)。用差示扫描量热法(DSC)测定了玻璃化转变温度(Tg)，并给出了玻璃化转变温度与熔体中氧化钾含量的浓度关系。

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Viscosity, Free Activation Energy, and Glass Transition Temperature of Potassium Boron K2O–B2O3 Melts

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.

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来源期刊

Glass Physics and Chemistry 工程技术-材料科学：硅酸盐

CiteScore

1.20

自引率

14.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Glass Physics and Chemistry presents results of research on the inorganic and physical chemistry of glass, ceramics, nanoparticles, nanocomposites, and high-temperature oxides and coatings. The journal welcomes manuscripts from all countries in the English or Russian language.