用相图原理研究玻璃结构和性质 (Ⅱ)核磁共振谱研究锂硼硅、镉硼锗和锂硼碲玻璃结构

Research on properties and structures of borate glasses using phase diagram method II. NMR studies of glass structures in the systems Li_2O-B_2O_3-SiO_2, CdO-B_2O_3-GeO_2 and Li_2O-B_2O_3-TeO_2

本文在以前工作的基础上,用电子计算机计算了Li_2O-B_2O_3-SiO_2,CdO-B_2O_3-GeO_2和Li_2O一B_2O_3-TeO_2三元玻璃系统的NMR数据(N_(BO_4)),和实验结果相比较,根据相图原理,提出了一种新的玻璃结构模型,即相图模型.作者认为:玻璃和晶体具有相似的结构,多成分玻璃则是由相图中最邻近的同成分熔融化合物组成的混合物,且各化合物的量可按“杠杆原理”计算,即相图模型.对于未知相图的三元系统,在相图模型的基础上,作者作了一些简单的假设并进行修正.

Based on the principle of phase diagram, the present authors have calculated the values of NBO4 by computer in glass systems Li2O-B2O3-SiO2, CdO-B2O3-GeO2 and Li2O-B2O3-TeO2, and compared the calculated values with the experimental ones, and put forward a new quantitative structure model of glass. We suggest that the structure of glass resembles the structure of the related crystalline. A multicompo-nent glass can be regarded as the melted mixture of some nearest congruent melting compounds in phase diagram, and the contents of the nearest congruent melted compounds are allotted by level rule, namely the phase diagram model we put forward some simple assumptions and make some oorraction for ternary systems' which do not have perfect phase diagrams.