用相图原理研究玻璃性质与结构(Ⅰ)核磁共振谱研究Na_2O-B_20_3-SiO_2玻璃结构

Research properties and structures of borosilicate glasses using a phase diagram method I. NMR studies of structure in Na_2O-B_2O_3-SiO_2 glass

本文用电子计算机计算Na_2O-B_2O_3-SiO_2玻璃系统的NMR数据,并根据实验结果,应用相图原理,提出了一种新的玻璃结构模型.本文认为组份简单的玻璃与相同成分化合物的结构相似,而多组份玻璃则是由相图中最邻近的同成份熔融化合物组成的混合物.

NMR spectroscopy has been used for many years to investigate the structures ot glasses. NMR spectra have permitted the identification in the glasses of structorel groupings from the crystalline compounds, and the relationship of these groupings have also been determined by Krogh-Moe and Bray.According to computer calculated NMR data based on the experimental resulls in Na2O-B2O3-SiO2 system glasses, a new quantitative structural model from the principle of phase diagrams is proposed.We believe that the structure of a simple glass resembles the related congruent melting compound. A multicomponent glass can be regarded as the melting mixtures of some nearest congruent melting compound in the phase diagram.