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dc.contributor.authorSilva, Juliana Batista da (Centro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
dc.contributor.authorBrito, Walter de
dc.contributor.authorMohallem, N. D.S.
dc.identifier.issnISSN 0025-5416
dc.description.abstractNanocrystalline CoFe2O4 powders were synthesized using metallic nitrates dispersed in aqueous media precipitated by stoichiometric amount of NH4OH. The obtained amorphous powder was washed, dried at 80 C degress and heat-treated at various temperatures for 2 h for crystallization of the material. The influence of heat treatment on the texture and morphology of the cobalt ferrite powder was studied. The specific surface area varied from 150 to 1m2g-1 while the average crystalline size varied from 17 to 100 mm with the annealing temperature. The corresponding saturation magnetization value at room temperature varied from 25.9 to 60.3 emu g_1 and the coercivity increases up to 1.5 kOe when the crystallite size reached 94nm and dropped up to 0.54 kOe with the increase in crystalline size.
dc.subjectporous materials
dc.subjectheat treatments
dc.titleInfluence of heat treatment on cobalt ferrite ceramic powders
dc.typeArtigo Periódico
dc.creator.affiliationCentro de Desenvolvimento da Tecnologia Nuclear/CDTN, Belo Horizonte, MG, Brasil
dc.creator.affiliationUniversidade Federal de Minas Gerais/UFMG, Belo Horizonte, MG, Brasil
dc.title.journalMaterials Science and Engineering
Appears in Collections:Artigo de periódico

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