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Synthesis of dense, fine‐grained hexagonal barium ferrite ceramics by two‐step sintering process
Author(s) -
Zhou Enmin,
Zheng Hui,
Zheng Liang,
Zheng Peng,
Ying Zhihua,
Deng Jiangxia,
Zhou Jijun
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12864
Subject(s) - materials science , sintering , microstructure , barium ferrite , ceramic , grain size , ferrite (magnet) , hexagonal crystal system , magnetization , saturation (graph theory) , composite material , metallurgy , crystallography , magnetic field , chemistry , physics , mathematics , quantum mechanics , combinatorics
Two‐step sintering ( TSS ) process has been used to fabricate hexagonal barium ferrite (BaFe 12 O 19 , BaM) ceramics with high density and fine grain size. The densification, microstructure, and magnetic properties were investigated. The sample prepared by the TSS process with the first‐step sintering temperature of 1325°C, the second‐step sintering temperature of 1300°C, and holding time of 20 hours has a density of 98.01 ± 0.25% of the theoretical density (5.29 g/cm 3 ) and exhibits a uniform microstructure with small average grain size (2.92 ± 0.05 μm). In addition, the saturation magnetization of BaM ceramics has been effectively improved and the value is around 69 emu/g, which is close to theoretical saturation magnetization (72 emu/g). Briefly, using the TSS process can obtain dense and fine‐grained BaM ceramics with high saturation magnetization.