ACTIVITY OF SUBSTRATES IN THE CATALYZED NUCLEATION OF GLASS-FORMING MELTS .1. THEORY
ACTIVITY OF SUBSTRATES IN THE CATALYZED NUCLEATION OF GLASS-FORMING MELTS .1. THEORY
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DOI：
10.1016/0022-3093(93)90736-h
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发表时间：
1993-09-01
影响因子：
3.5
通讯作者：
GUTZOW, I
中科院分区：
文献类型：
--
作者：
DOBREVA, A;GUTZOW, I
从广义热力学的角度研究了不同不溶性添加剂在有机和无机玻璃成型熔体非均相成核中的成核活性。成核催化剂的活性是通过附着能来确定的，并根据底物和过度生长晶体的内聚力来计算。通过计算沉积/衬底界面处失配位错的总能量，估计了结构失配对键能的相对贡献。这种方法扩展并规定了现有晶体匹配和不匹配概念的应用限制。通过这种广义方法，利用相应成核催化剂的升华热（或熔化温度）或其热膨胀系数的数据，就有可能预测玻璃成型熔体诱导结晶过程中各种结晶芯的成核活性。
The nucleating activity of different insoluble additives in the heterogeneous nucleation of organic and inorganic glass-forming melts is treated from a generalized thermodynamic standpoint. The activity of a nucleating catalyst is defined through the adhesion energy and calculated from the forces of cohesion in the substrate and in the overgrowing crystal. An estimate is also made of the relative contribution of structure mismatch to the bonding energy by evaluating the total energy of misfit dislocations at the deposit/substrate interface. This approach extends and specifies the limits of application of existing concepts of crystallographic matching and mismatching. By this generalized method, there is a possibility of predicting the nucleating activity of various crystallization cores in the induced crystallization of glass-forming melts by using data on the heat of sublimation (or the temperature of melting) of the respective nucleation catalyst or the value of its thermal expansion coefficient.