【摘要】 用¹¹B付立叶变换核磁共振波谱研究了钠硼硅酸盐玻璃的结构。在测定处于硼氧四面体中的硼原子分数N₄的基础上,提出一个结构模型,解释了在高碱（R=Na₂O/B₂O₃≥2）,高硅（K=SiO₂/B₂O₃≥8）区中,N₄随组成的变化规律。认为硼原子可能仅存在于[BSi₄O₁₀]^-单位及焦硼酸盐[B₂O₅]^4-单位中。此外,还设定了所引入的Na₂O在硼酸盐和硅酸盐网络之间分配的一个规则。在相应的组成区中,当一分子Na₂O被硼酸盐网络吸取时,两个[BSi₄O₁₀]^-单位便瓦解而产生一个[B₂O₅]^4-单位。更多还原

【Abstract】 The ¹¹B Fourier transform spectra have been used to study the structure of Na₂O-B₂O₃-SiO₂ glasses.Based on the measurements of fraction N₄ of the boron atoms in the boronoxygen. tetrahedra, a structural model has been proposed to explain the rule for the varianceof N₄ with the change of composition in region of high alkali （Na₂O/B₂O₃≥2） and highsilica （SiO₂/B₂O₃≥8）.It is suggested that in the above region boron atoms may only existin reedmergnerite [BSi₄O₁₀]^1- units and pyroborate [B₂O₅]^4- units.In addition, a rule for thefractional distribution of Na₂O between the borate and silicate networks has been postu-lated. In the corresponding composition region, when one molecule of Na₂O is taken up bythe borate network, two [BSi₄O₁₀]^1- units are destroyed to create one [B₂O₅]^4- unit.更多还原