Study of morphological and magnetic properties of microwave sintered barium strontium hexaferrite

Abstract

Magnetic materials are important electronic materials that have a wide range of industrial and commercial applications. Barium strontium hexaferrite (Ba 0.5 Sr 0.5 Fe 12 O 19 -BSF) were prepared by a sol-gel method using D-Fructose as fuel and the heat treatment was carried out in a microwave furnace. The effects of the sintering temperature on the morphology, crystalline structure and magnetic properties are studied. Sintering temperature affected the grains in compact samples. The sintered product possessed dense microstructure with clear micro grains and is in consistence with the XRD analysis based on the peak intensity of the (107) plane. Magnetic measurement shows that the barium strontium hexaferrite sample sintered at 1,150°C has the coercive field of 1,998 Gauss, remnant magnetization of 38.87 emu/g and the saturation magnetization of 53.44 emu/g.

Microstructural and Dielectric Properties of Zr Doped Microwave SinteredCaCu3Ti4Jesurani1, Kanagesan2, Hashim3 et al. 2014Advances in Materials Science and EngineeringSelf Cite4040View full textAdd to dashboardCite

“…The purpose of the present work is to dope Zr (0, 0.02, 0.1, 0.2, and 0.5 mol%) into CCTO ceramics and to investigate the effects of doping on the surface morphology and dielectric properties of Zr-substituted CCTO ceramics. Microwave sintering is adopted in this work due to its advantages over conventional heating techniques which include reduced processing time, energy saving, fine microstructures, and improved material properties [23][24][25][26]. The understanding of the electric and dielectric behavior of these ceramics would facilitate the processing of CCTO to achieve certain electrical properties under desired sintering temperature.…”

Síntese por reação por combustão de nanopós de hexaferrita de estrôncio dopada com cromo

“…As hexaferritas de estrôncio (SrM) são cerâmicas ferrimagnéticas, intensamente utilizadas como magnetos permanentes [1,2], e tem como principais características: elevada anisotropia magneto cristalina, altos valores de magnetização e temperatura de Curie, resistência ao calor e à corrosão, excelente estabilidade química e baixa densidade [3]. As propriedades elétricas e magnéticas das ferritas SrM, estão diretamente relacionadas com sua microestrutura, e esta, pode ser modificada e até mesmo controlada, pelas condições de síntese, como os tipos e variáveis de processamento e também pela introdução de dopantes.…”