Study of the temperature and organic bindings effects in the dielectric and structural properties of the lithium ferrite ceramic matrix (LiFe5O8)
| Autor: | Antonio Sergio Bezerra Sombra, Selma Elaine Mazzetto, R. S. T. M. Sohn, Marcos Mota do Carmo Costa, Ana Angélica Mathias Macêdo, M.P.F. Graça |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element Dielectric Atmospheric temperature range law.invention Dielectric spectroscopy Thermogravimetry Differential scanning calorimetry chemistry Chemical engineering Mechanics of Materials law visual_art Materials Chemistry visual_art.visual_art_medium Lithium Calcination Ceramic |
| Zdroj: | Journal of Alloys and Compounds. 509:9466-9471 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2011.07.038 |
| Popis: | In this study, the effects of the calcination temperature and of the organic bindings in the structural and dielectric properties of lithium ferrite (LiFe 5 O 8 ) were investigated. The organic bindings used were glycerol, PVA (polyvinyl alcohol) and Galactomannan ( Adenanthera pavonina ). The investigated calcination temperature range was from 773 K to 1073 K. The structural properties were analyzed using differential scanning calorimetry, thermogravimetry, X-ray diffraction and infra-red spectroscopy. The electrical and magnetical properties were investigated using impedance dielectric spectroscopy and Mossbauer spectroscopy. The study of the structural and electrical properties of the lithium ferrites is an important issue in view to their attractive technological properties and low cost of fabrication. This work shows that the binding type, affects significantly the dielectric constant and loss of the LiFe 5 O 8 ceramics. |
| Databáze: | OpenAIRE |
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