METHOD FOR PRODUCING NICKEL-MANGANESE-COBALT SPINEL FERRITE HAVING LOW PERMEABILITY LOSS AND NICKEL-MANGANESE-COBALT SPINEL FERRITE PRODUCED THEREBY
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United States of America Patent
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Issued Date -
Jun 23, 2011
app pub date -
Aug 10, 2009
filing date -
Aug 12, 2008
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Abandoned
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Abstract
Disclosed herein is a method for producing a spinel ferrite which has a low permeability loss and a low dielectric loss so that the spinel ferrite can be widely used as a material for high-frequency (MHz) electronic components, and a spinel ferrite produced thereby. The method for producing the spinel ferrite comprises the steps of: providing nickel oxide, cobalt oxide, manganese oxide and iron oxide; wet-mixing the nickel oxide, the cobalt oxide, the manganese oxide and the iron oxide in methanol to obtain a mixture; collecting powder from the mixture and drying the collected powder; grinding the dried powder; and heat-treating the dried powder, thereby producing a nickel-manganese-cobalt spinel ferrite having a low permeability loss and a low dielectric loss. The nickel-manganese-cobalt spinel ferrite can be widely as a material for RF electronic components, and when it is applied to an antenna, it can reduce the length of the antenna and improve the bandwidth, efficiency and performance of the antenna.
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