Synthesis of low coercive BaFe12O19 hexaferrite for microwave applications in low-temperature cofired ceramic

Rane, Vivek A. ; Meena, Sher Singh ; Gokhale, Suresh P. ; Yusuf, S. M. ; Phatak, Girish J. ; Date, Sadgopal K. (2013) Synthesis of low coercive BaFe12O19 hexaferrite for microwave applications in low-temperature cofired ceramic Journal of Electronic Materials, 42 (4). pp. 761-768. ISSN 0361-5235

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Official URL: https://link.springer.com/article/10.1007%2Fs11664...

Related URL: http://dx.doi.org/10.1007/s11664-012-2398-6

Abstract

Polycrystalline M-type barium hexaferrite (BaFe12O19) samples have been synthesized by solution combustion route at different pH and calcination conditions in order to reduce the coercivity for microwave applications in low-temperature cofired ceramic (LTCC) substrates. Structural, morphological, and magnetic properties of BaFe12O19 were studied by x-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Raman spectroscopy, vibrating sample magnetometry (VSM), and Mössbauer spectroscopy. The formation of a single-phase hexagonal structure was confirmed by XRD. The Raman spectra reveal all characteristic peaks of BaFe12O19, illustrating the phase purity and crystal lattice symmetry of the synthesized material. Mössbauer spectra illustrate the existence of Fe3+ cations at all five crystallographic lattice sites. The microstructural features observed by FESEM disclose the growth of nanoregime particles into hexagonal platelet particles after calcination at temperatures from 800°C to 1200°C. The VSM results show a lower coercivity (1350 Oe to 3500 Oe) together with reasonably high saturation magnetization (55 emu/g to 60 emu/g) and a high bulk resistivity (>109 Ω-cm) at room temperature. The dependence of magnetic and electrical properties on the preparation and processing conditions is also discussed.

Item Type:Article
Source:Copyright of this article belongs to Springer Verlag.
Keywords:Barium Hexaferrite; LTCC; Coercivity; Mössbauer Spectroscopy; Raman Spectroscopy
ID Code:112083
Deposited On:01 Dec 2017 11:45
Last Modified:01 Dec 2017 11:45

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