Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 765, Issue -, Pages 951-960Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.06.221
Keywords
M-type barium ferrite ceramics; Sol-gel process; Ni substitution; Dielectric properties; Magnetic properties
Categories
Funding
- Natural Science Foundation of Zhejiang Province [LY17E020006]
- National Natural Science Foundation of China [51772269, 51272230]
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High dielectric and magnetic properties coexisted in one is important for the miniaturization and multifunction of electronic devices. Ni doped barium ferrites were successfully fabricated by sol-gel technique in this work. The microstructures and properties were investigated by the means of XRD, SEM, XPS, impedance analysis and magnetic property measurement systems. Results showed that main phase of M-type barium ferrite with hexagonal plate-like grains and Ni2+ ions substituting for Fe3+ as BaFe12-xNixO19 was formed. Ni2+ doping promotes the formation and grain growth of barium ferrite ceramics. The optimized sintering temperature was 1250 degrees C at which relatively perfect microstructure was formed. Giant permittivity above 20 k and low dielectric loss of similar to 0.1 generated in the ferrite. Low H-a of 14-13 kOe and H-c of 145-111 Oe emerged and large saturation magnetization of 60-72 emu/g presented in Ni2+-doped barium ferrites ceramics. The coexistence of impressive dielectric and magnetic properties in Ni2+-doped barium ferrites ceramics, makes it potential candidate in the area of miniaturization and multifunction of electronic devices. (C) 2018 Elsevier B.V. All rights reserved.
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