期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 406, 期 -, 页码 144-148出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2016.01.009
关键词
M-type Hexaferrites; Fe content; La-Cu substitution; Magnetic properties; Micro structure
资金
- National Natural Science Foundation of China [51272003, 51472004, 11375011, 21271007]
- Natural Science Foundation of Anhui Province [1408085MA12]
- Key Program of the Education Department of Anhui Province [KJ2013B057, KJ2012B027]
- Scientific Research Fund of Sichuan Provincial Education Department [13ZA0918]
- Major Project of Yibin City of China [20125F034]
- Research Program of Higher Education of China [20123401110008]
In this study, the hexaferrite magnetic powders and magnets according to the formula Sr0.75La0.25FexCu0.20O19, where x ranging from 10.40 to 11.80 with a step of 0.2 were prepared by the solid-state reaction. X-ray diffraction was performed to investigate the microstructures of the magnetic powders. The results show that a single magnetoplumbite phase is obtained for the magnetic powders with Fe content (10.60 <= x <= 11.60). For the magnetic powders with Fe content (x) of 10.40 or 11.80, magnetic impurities appear in the structure. A field emission scanning electron microscopy was hired to explore the micrographs of the magnets. The hexaferrite magnets are formed of hexagonal-shaped crystals. A magnetic properties test instrument was used in order to study the magnetic properties of the magnets. The remanence and maximum energy product first increase with Fe content (x) from 10.40 to 11.00 and then begin to decrease when Fe content (x) continues to increase. While the intrinsic coercivity and magnetic induction coercivity first increase with Fe content (x) from 10.40 to 11.20 and then decrease when Fe content (x) > 11.20. (C) 2016 Elsevier B.V. All rights reserved.
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