Abstract

The structural characteristics (structural resistance coefficient, volume porosity, tortuosity coefficient, average pore radius, specific surface area) and specific electrical conductivity of high-silica micro- and macroporous glasses with different compositions (basic magnetite-free and magnetite-containing glasses) have been studied in solutions of sodium, lanthanum, and iron(III) chlorides at a constant ionic strength. It has been found that the differences in the morphology of the pore space and characteristics of secondary silica are the reasons for different intensities of variations in the structural parameters of microporous glasses upon their long-term contact with electrolyte solutions, with the most pronounced time variations occurring in lanthanum chloride solutions. In indifferent electrolyte solutions, glass composition has no effect on the value of the efficiency coefficient. For microporous glasses in solutions containing specifically adsorbabable ions, the value of the efficiency coefficient is mainly affected by the structure of secondary silica in pore space, other conditions being equal. It has been revealed that, in iron chloride solutions, the specificity of the counterions is more pronounced for the basic porous glasses.

中文翻译：

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钠，镧和氯化铁（III）溶液中不同组成的多孔玻璃的结构特性和电导率

摘要

具有不同组成的高二氧化硅微孔和大孔玻璃（不含碱性磁铁矿和含磁铁矿的玻璃）的结构特征（结构电阻系数，体积孔隙率，曲折系数，平均孔半径，比表面积）和比电导率具有在钠，镧和氯化铁（III）溶液中以恒定的离子强度进行了研究。现已发现，微孔玻璃与电解质溶液长期接触后，孔隙空间形态和次级二氧化硅特性的差异是微孔玻璃结构参数变化强度不同的原因，时间变化最为明显。发生在氯化镧溶液中。在无差别的电解质溶液中，玻璃组成对效率系数的值没有影响。对于含有特定可吸附离子的溶液中的微孔玻璃，在其他条件相同的情况下，效率系数的值主要受孔隙空间中次生二氧化硅结构的影响。已经发现，在氯化铁溶液中，对于碱性多孔玻璃，抗衡离子的特异性更加明显。