Synthesis of chromium-doped strontium hexaferrite nanopowders by combustion reaction

Author(s)

W. S. Castro ^[1] ; R. R. Corrêa ^[2] ; A. J. A. de Oliveira ^[3] ; R. H. G. A. Kiminami ^[4]

Affiliation

^[1] Universidade Federal de S. Carlos. Departamento de Engenharia de Materiais

^[2] Instituto Federal de Educação, Ciência e Tecnologia do Maranhão. Departamento de Eletroeletrônica

^[3] Universidade Federal de S. Carlos. Departamento de Física

^[4] Universidade Federal de S. Carlos. Departamento de Engenharia de Materiais

• Document type: Journal article
• Source: Cerâmica; v. 60, n. 354, p. 254-258, 2014-06-00.

Abstract

Chromium-doped strontium hexaferrite powder was prepared by combustion reaction. The influence of the Cr3+ concentration on the SrCr xFe12-xO19 system was investigated. The powder was prepared according to the concept of propellant chemistry and heated on a conventional plate. The resulting material was characterized by X-ray diffraction, scanning electron microscopy and magnetic measurements. The results indicate that chromium-doped hexaferrite nanopowders were obtained successfully. The presence of the secondary phase (SrFe2O5) tended to decrease with increasing chromium content and the ratio of x = 0.4 of chromium enhanced the material's saturation magnetization. (AU)

• FAPESP's process: 08/04025-0 - Nanostructured multifunctional multiferroic materials: synthesis, properties, phenomenology and applications
• Grantee: José Antonio Eiras
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 12/24025-0 - Magnetic, electrical and magnetostrictive properties of multiferroic composites and dilute magnetic semiconductors oxides
• Grantee: Adilson Jesus Aparecido de Oliveira
• Support Opportunities: Regular Research Grants