Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Autor(es)

Assis, R. B. ^[1] ; Bomio, M. R. D. ^[1] ; Nascimento, R. M. ^[1] ; Paskocimas, C. A. ^[1] ; Longo, E. ^[2] ; Motta, F. V. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Rio Grande do Norte, DEMAT, CT, Lab Chem Synth Mat, BR-59072970 Natal, RN - Brazil

^[2] UNESP, LIEC, IQ, BR-14801907 Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY; v. 118, n. 1, p. 277-285, OCT 2014.
• Citações Web of Science: 3

Resumo

Ferrites Ni0.75Zn0.25Fe2O4 were obtained by polymeric precursor method and calcined in a short time with microwave energy to assess the morphological and microstructural characteristics. Samples were calcined at 500, 650, 800, and 950 A degrees C for 30 min in a microwave oven. The resulting powders were characterized by thermal analysis (TG/DSC), X-ray diffraction (XRD), Fourier transform infrared spectrometer, field-emission gun scanning electron microscope (FEG-SEM), and energy-dispersive X-ray spectroscopy. The XRD results showed the formation of single ferrite phase at temperature of 500 A degrees C for 30 min. The FEG-SEM analysis showed agglomerated particles with formation of non-dense longitudinal plates, with interparticle porosity and agglomerated fine particles. The rapid calcination by microwave energy demonstrated satisfactory results in relatively low temperature of 500 A degrees C for 30 min and appeared to be a promising technique for obtaining nickel-zinc ferrite powders. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs