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首页> 外文期刊>Glass Physics and Chemistry: A Journal on the Structural, Physical, and Chemical Properties and Nature of Inorganic Glasses and Glass-Forming Melts >Temperature Dependences of the Density of Borate Glasses in Equilibrium States at Temperatures below the Glass Transition Point
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Temperature Dependences of the Density of Borate Glasses in Equilibrium States at Temperatures below the Glass Transition Point

机译：低于玻璃化转变温度的平衡状态下硼酸玻璃密度的温度依赖性

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摘要

The kinetics of density relaxation during isothermal treatment of samples of vitreous boron oxide and sodium borate glasses (containing 15, 20, and 30 mol % Na2O) cooled from high temperatures and after heating of the samples stabilized at low temperatures is investigated over a wide range of temperatures below the glass transition point T_g. It is established that there exists a temperature T_S below which the density in the equilibrium state does not depend on the temperature, i.e., the temperature at which the supercooled liquid transforms into a new noncrystalline solid state. The distinguishing feature of this state is the absence of structural transformations after a change in the temperature. The temperatures of the transition of the supercooled liquid to the noncrystalline solid state and the ranges of lower temperatures at which the supercooled liquid can reach an equilibrium state within the limits of experimental error coincide with those previously obtained in the study of relaxation processes in these glasses by the small-angle X-ray scattering technique.
机译：对从高温冷却的玻璃态氧化硼和硼酸钠玻璃（包含15、20和30 mol％的Na2O）样品进行等温处理期间密度松弛的动力学，并研究了在低温下稳定化的样品加热后的情况温度低于玻璃化转变温度T_g。可以确定存在一个温度T_S，低于该温度时平衡状态下的密度不取决于该温度，即过冷液体转变成新的非晶态固态的温度。该状态的显着特征是温度变化后不存在结构转变。过冷液体转变为非晶态固态的温度以及在实验误差范围内过冷液体可以达到平衡状态的较低温度范围与先前在研究这些玻璃的弛豫过程中获得的温度一致通过小角度X射线散射技术。

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