AlF3-K2NbOF5系统非晶态材料离子导体的结构与电性能

本文研究了AlF₃-K₂NbOF₅系列玻璃导电性。通过对AlF₃-K₂NbOF₅系列玻璃的Raman光谱研究,初步确认了玻璃的结构。根据结构随组成的变化情况,进一步讨论了玻璃的电导率。AlF₃-K₂NbOF₅二元系玻璃,当AlF₃的含量在21—29mol％范围内时,Al^{3+关键词：}

A STUDY ON STRUCTURE AND ELECTRICAL PROPERTY OF AMORPHOUS MATERIALS IN SYSTEM AlF3-K2NbOF5

In this paper, the ionic conduction in the glass system AlF₃-K₂NbOF₅ have been studied. The structure of glasses is also primarily established by Raman spectroscopy. The ionic conductivity of glasses is further discussed, based on the change of composition and structure. For glasses in system AlF₃-K₂NbOF₅, when A1F₃ content ranges from 21-26 mol%, A1³⁺ and Nb⁵⁺ ions are in octahedral coordination, and the ionic conductivity increases with increasing AlF₃ content. When A1F₃ content reaches 29 mol%, A1³⁺ ions are partly in tetrahedral coordination, and the ionic conductivity decreases. The effect is supposed to be caused by A1F₄^- ion tetrahedron. Because of the appearance of A1F₄^- ion tetrahedron, the mobile ion channels are possibly blocked. The ionic conductivity of glasses in this system is 1.045×10^-2Ω^-1·cm^-1.at 194℃.