【摘要】 四元磷酸盐玻璃的 Raman 光谱和 AlO₆丰度变化的研究表明,玻璃的离子电导率主要由活动离子 Na⁺的总数决定,Na₂O 含量越高,其电导率也越高;但是,玻璃结构对电导率也有一定影响。由 AlO₄四面体和（Al—O—P）^-基团构成结构网络的某些 Na₂O—Al₂O₃—P₂O₅玻璃有较高的离子电导率。当以 MgO 替代玻璃中的 Al₂O₃时,由于MgO 只起网络修饰体作用,电导率是单调下降的。以 SiO₂替代 Al₂O₃时,情况有所不同。由于 SiO₂可能兼起网络形成体和修饰体的作用,无疑使玻璃结构变得复杂了。只有在参与网络的 SiO₂达到相当量的情况下,才有希望提高玻璃的电导率。外加 SiO₂到 Na₂O—Al₂O₂—P₂O₅玻璃内,导致玻璃中的 Na⁺离子的相对量降低,所以其电导率总是下降的。更多还原

【Abstract】 Studies of the changes in Raman spectra and AIO₆ abundance for quarternary pho-sphate glasses show that the ionic conductivity of the glasses is mainly dependent on thetotal number of active ions,Na⁺;the more Na₂O they contain,the higher conductivitythey have;but there is also certain effect of the glass structure on conductivity.Some ofNa₂O-Al₂O₃-P₂O₅ ternary glasses,in which the structure network consists of AlO₄ and（Al-O-P）^- groups,have higher ionic conductivity.When Al₂O₃ in the glasses is replacedby MgO,the ionic conductivity is decreased monotonously,because MgO can only playthe role of network modifier.However,when Al₂O₃ is replaced by SiO₂,the situation isquite different.There is no doubt that it makes the glass structure more complicated,owingto the fact that SiO₂ probably plays the role of both network former and modifier.It ispossible to improve the glass conductivity only if the amount of SiO₂ which takes part inthe network reaches a considerable value.The addition of SiO₂ to Na₂O-Al₂O₃-P₂O₅ glasses leads to decrease the relativeamount of Na⁺ ions in the glasses,so the glass conductivity is always decreased.更多还原