Sidebottom D L
Physics Department, Creighton University, Omaha, Nebraska 68152, USA.
Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Dec;92(6):062804. doi: 10.1103/PhysRevE.92.062804. Epub 2015 Dec 2.
The fragilities of over 150 different network-forming glass melts are shown to conform to a common dependence on just one parameter: the connectivity of the weakest network structure present in the associated glass solid. This includes both nonoxide network-forming chalcogenide melts as well as a variety of alkali oxide glasses, and spans a broad range of connectivity, ϕ, from polymeric structures (ϕ=2) to overconstrained random networks with connectivities well in excess of the rigidity threshold (ϕ(C)=2.4). A theoretical framework for the origin of this universal pattern is offered within the context of entropic models of the glass transition.
超过150种不同的形成网络的玻璃熔体的脆性被证明仅与一个参数存在共同的依赖关系：相关玻璃固体中存在的最弱网络结构的连通性。这包括非氧化物形成网络的硫属化物熔体以及各种碱金属氧化物玻璃，并且涵盖了广泛的连通性范围，ϕ，从聚合物结构（ϕ = 2）到连通性远超过刚性阈值（ϕ(C)=2.4）的过度约束随机网络。在玻璃转变的熵模型背景下，提供了这种通用模式起源的理论框架。
