材料期刊网

本文采用化学键方法对卤化物及硫卤玻璃的化学键特性进行了探讨。所有的玻璃组成均可分为3类：硬质玻璃组分，如氟化物；软质玻璃组分，如溴化物、碘化物、硫系化物；中间玻璃组分，如氯化物。具有高正电荷，小离子半径的阳离子适合形成硬质玻璃，而那些低氧化态、大离子半径的阳离子则适合于形成软质玻璃。导致硬质玻璃组分与软质玻璃组分具有不同“赠-受”键的原因是这两种玻璃组分具有不同的聚合机理，玻璃结构中簇间化学键力平衡和热能(温度)平衡也得到了讨论。

The nature of chemical bond of halide and chalcogenide glasses was discussed in terms of the che-mical bond approach. All the glass components can be divided into three groups：hard glass components,such as fluorides;soft glass components,such as bromides,iodides,chalcogenides;and borderline glass components,such as chlorides.The cations with high positive charge and small ionic radii are suitable to forming hard glasses,and those with low oxidation state and large radii are suitable to forming soft glasses.The different donor-acceptor bonds for hard glass components and for soft glasses are the reason that the two glass components have different mechanisms of polymerization. The balance between the chemical bonding force of inter-cluster and the thermal energy(temperature)was also discussed. Some new chalcohalid glasses were prepared according to this principle.