Abstract

The effect of crystal nuclei formed during the production of glass on the kinetics of nucleation of crystals in it at temperatures below the glass transition temperature is studied. A glass composition of 22.4Na₂O ⋅ 28.0CaO ⋅ 49.6SiO₂ (mol %) is studied (glass transition temperature 540°C). Using the development method, the dependence of the number of nucleated crystals on the heat treatment time is determined at a temperature of 500°C. The nuclei of crystals formed during the production of glass lead to an unusual, in the form of a step, initial section of the curve N(t). The rate of stationary nucleation of crystals with a long time of nucleation heat treatment exceeding the induction period of crystal nucleation is determined. The reasons for the unusual initial nature of the dependence N(t) are discussed. The data obtained make it possible to expand the temperature dependences of the stationary rate and the induction period of crystal nucleation for the given glass toward low temperatures.

中文翻译：

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在低于玻璃化转变温度的温度下，苏打石灰玻璃中的晶体成核

摘要

研究了在玻璃生产温度以下的温度下，玻璃生产过程中形成的晶核对其中晶体的成核动力学的影响。研究了22.4Na ₂ O · 28.0CaO · 49.6SiO ₂（mol％）的玻璃组成（玻璃化转变温度540℃）。使用显影方法，在500℃的温度下确定有核晶体的数量对热处理时间的依赖性。在玻璃生产过程中形成的晶体核导致不寻常的，呈阶梯状的曲线N（t）。确定长时间的成核热处理时间超过晶体成核诱导期的晶体的静态成核速率。讨论了依赖性N（t）异常初始性质的原因。对于给定的玻璃，获得的数据可以将固定速率和晶核形成诱导期的温度依赖性扩展到低温。