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Study of the temperature and organic bindings effects in the dielectric and structural properties of the lithium ferrite ceramic matrix (LiFe5O8) |
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| Authors: | M.M. Costa,R.S.T.M. Sohn,A.A.M. Macê doS.E. Mazzetto,M.P.F. Graç aA.S.B. Sombra |
| Affiliation: | a Telecommunications and Materials Science and Engineering Laboratory (LOCEM), Department of Physics, Federal University of Ceará, Campus do Pici, Postal Code 6030, 60455-760 Fortaleza, CE, Brazil b Department of Physics, Federal University of Ceará, Campus do Pici, Postal Code 6030, 60455-760 Fortaleza, CE, Brazil c Technology Products Laboratory (LPT), Northeast Network on Biotechnology (RENORBIO), Federal University of Ceará, Postal Code 6021, 60455-900 Fortaleza, CE, Brazil d Department of Physics, Federal University of Mato Grosso - UFMT, 78060-900 Cuiabá, MT, Brazil e I3N - Aveiro, Physics Department, Aveiro University, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal |
| Abstract: | In this study, the effects of the calcination temperature and of the organic bindings in the structural and dielectric properties of lithium ferrite (LiFe5O8) 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 Mössbauer 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 LiFe5O8 ceramics. |
| Keywords: | Ceramic Lithium ferrite Magnetic material Dielectric spectroscopy |
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