A comparative study of NiZn ferrites modified by the addition of cobalt



Título del documento: A comparative study of NiZn ferrites modified by the addition of cobalt
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312388
ISSN: 1516-1439
Autores: 1

2

Instituciones: 1Universidade Federal de Minas Gerais, Departamento de Fisica, Belo Horizonte, Minas Gerais. Brasil
2Fundacao Centro Tecnologico de Minas Gerais, Belo Horizonte, Minas Gerais. Brasil
Año:
Periodo: Jul
Volumen: 2
Número: 3
Paginación: 231-234
País: Brasil
Idioma: Inglés
Tipo de documento: Artículo
Enfoque: Descriptivo
Resumen en inglés Off-stoichiometric NiZn ferrite was obtained by hydrothermal process and compacted in torus form under different pressures. Two samples A1 and A2 - cobalt doped (0.5 %) were sintered at 1573 K in air atmosphere during 3 h. The magnetic properties were studied by vibrating sample magnetometry, Mössbauer spectroscopy and complex impedanciometry. X-ray diffraction and Hg porosimetry were used in order to determine the average grain size and the type of packing in the samples. Both samples exhibited superparamagnetic behavior in the hysteresis loop. This effect does not agree with Mössbauer results, which were fitted using Normos, a commercial computer program. All samples parameters were compared
Disciplinas: Ingeniería
Palabras clave: Ingeniería química,
Cobalto,
Níquel,
Zinc,
Ferritas
Keyword: Engineering,
Chemical engineering,
Cobalt,
Nickel,
Zinc,
Ferrites
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