Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 321, Issue 18, Pages 2896-2901Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2009.04.049
Keywords
Magnesium-doped and copper-doped lithium zinc ferrite; Calcination; Phase composition; Microwave absorption property
Funding
- Natural Science Foundation of the People's Republic of China [50672051]
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Lithium zinc ferrites doped with magnesium and copper were prepared by means of a combination of sol-gel method and subsequent calcination. The crystalline phase and microstructure of different doped lithium zinc ferrites were measured by X-ray powder diffraction and scanning electronic microscopy analysis. The results indicate that there are no remarkable differences in phase composition between pure lithium zinc ferrite and the as-doped lithium zinc ferrites. The effects of magnesium and copper dopants on microwave absorption in low-frequency region were investigated by the transmission/reflection coaxial line method. It was found from the present work that doping with copper improved microwave-absorbing properties, while doping with magnesium had little effect on microwave absorption of pure lithium zinc ferrite. (C) 2009 Elsevier B.V. All rights reserved.
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