Structural and electrical properties of iron molybdenum phosphate glasses |
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| Authors: | R S De Oliveira J A C De Paiva M A B De Araujo A S B Sombra |
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| Institution: | 1. Departamento de Física, Laboratório de óptica n?o Linear e Ciência dos Materiais (LONLCM), Universidade Federal do Ceará (UFC), Caixa Postal 6030, 60451-970, Fortaleza- Ceará, Brazil
2. Departamento de Cências da Natureza, Faculdade de Ciências e Letras do Sert áo Central (FECLESC), Universidade Estadual do Ceará (UECE), Rua José de Queiroz Pessoa 2554, 63900-000, Quixadá-Ceará, Brazil
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| Abstract: | Summary Iron molybdenum phosphate glasses xMoO3 · (0.6 -x)P2O5 · 0.4Li2O] :yFe2O3 with 0 ≤x ≤ 0.6 andy = 0.03 (mol%) prepared in ambient atmosphere using the melt quenching technique were studied by using DC electrical conductivity,57Fe M?ssbauer and infrared spectroscopies. The DC conductivity depends on the MoO3 concentrationx. It was observed that, with increasingx, the ratio Fe2+ /(Fe3+ + Fe2+) and the DC conductivity increase. Infrared spectroscopy and X-ray powder diffraction indicate that a Li2 MoO4 crystalline phase is present for high MoO3 content samples (x = 0.5, 0.6).
This work was partly sponsored by FINEP, CNPq (Brazilian agencies) and UECE (Universidade Estadual do Cearà). |
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| Keywords: | PACS 61" target="_blank">PACS 61 43 Fs Glasses |
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