Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 300, Issue 2, Pages 500-505Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2005.05.040
Keywords
ferrites; citrate precursor technique; electromagnetic properties; power loss; temperature
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Manganese-substituted nickel-zinc ferrites have been investigated as power core materials for applications in switched-mode-power supplies. High frequency operation of these power supplies requires high performance cores with low power losses. The main contributors to the power loss are eddy current loss, hysteresis loss and residual loss. The ferrites have been synthesized by the citrate precursor technique and their electromagnetic properties such as resistivity, permeability, saturation magnetization and Curie temperature studied. A power loss of 500 mW/cc could be obtained at a frequency of 500 kHz, flux density of 50 mT and temperature 100 degrees C. (c) 2005 Elsevier B.V. All rights reserved.
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