Abstract
New glasses have been prepared in the K 2NbOFAlF 3(NBAL) system, with the IR spectrum, UV spectrum and the thermal properties measured. The ionic conduction in NBAL glasses has been studied. Based on their Raman spectroscopy, the structure of the glasses is briefly studied. The effect of composition and structure of the glasses on their ionic conductivity is discussed. When the AlF 3 content ranges from 21 to 29 mol%, Al 3+ and Nb 5+ ions are octahedrally coordinated, and the ionic conductivity increases with the AlF 3 content. When the AlF 3 content reaches 29 mol%, part of the Al 3+ ions are tetrahedrally coordinated and the ionic conductivity decreases. The effect is attributed to the formation of AlF − 4 which block the moble ion channels. The ionic conductivity of glasses in this system is 1.045 × 10 −2 Ω −1· cm −1 at 194°C.
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