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Growth of self-textured barium hexaferrite ceramics by normal sintering process and their anisotropic magnetic properties

Title
Growth of self-textured barium hexaferrite ceramics by normal sintering process and their anisotropic magnetic properties
Authors
CHOI, SI YOUNGV. AnnapureddyJ. -H. KangH. PalneediJ. -W. KimC. -W. AhnS. D. JohnsonJ. Ryu
Date Issued
Dec-2017
Publisher
ELSEVIER SCI LTD
Abstract
In this report a simple and low-cost technique for growing highly textured barium hexaferrite ceramics without the need for flux or seed crystals to achieve grain orientation is demonstrated. Plate-like shaped barium hexaferrite particles were synthesized using a solid-state reaction process and then aligned under a weak magnetic field, followed by uniaxial compaction. The aligned hexaferrite particles appear to serve as seeds, forming textured grains during sintering. The development of texture was verified by X-ray diffraction (XRD), electron backscatter diffraction (EBSD), and vibration sample magnetometer (VSM) measurements. The prepared high-quality hexaferrite ceramics exhibited good anisotropic magnetic properties, comparable to those of single crystal counterparts. A mechanism for the formation of the self-textured grain growth of the barium hexaferrite ceramics, which involves grain boundary and lattice diffusion and interface reaction processes, is proposed. (C) 2017 Elsevier Ltd. All rights reserved.
Keywords
Self-texture; EBSD; Barium hexaferrite; Pole figure
URI
http://oasis.postech.ac.kr/handle/2014.oak/38951
DOI
10.1016/j.jeurceramsoc.2017.05.028
ISSN
0955-2219
Article Type
Article
Citation
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, vol. 37, no. 15, page. 4706, 2017-12
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