Growth of self-textured barium hexaferrite ceramics by normal sintering process and their anisotropic magnetic properties. Issue 15 (December 2017)

• Record Type: Journal Article
• Authors: Annapureddy, Venkateswarlu; Kang, Joo-Hee; Palneedi, Haribabu; Kim, Jong-Woo; Ahn, Cheol-Woo; Choi, Si-Young; Johnson, Scooter David; Ryu, Jungho
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 15(2017)
• Page Start: 4701
• Page End: 4706
• Publication Date: 2017-12
• Subjects: Self-texture -- EBSD -- Barium hexaferrite -- Pole figure; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.05.028
• Languages: English
• ISSNs: 0955-2219

Abstract

Graphical abstract: 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.