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A platform for research: civil engineering, architecture and urbanism
FERRITE COMPOSITION FOR ELECTROMAGNETIC WAVE ABSORBER, AND ELECTROMAGNETIC WAVE ABSORBER
PROBLEM TO BE SOLVED: To provide: an electromagnetic wave absorber which has high reflection and attenuation properties in a high frequency band of 100-400 MHz and which is superior in endurance against chipping and low in cost; and a ferrite composition for such an electromagnetic wave absorber.SOLUTION: A ferrite composition for an electromagnetic wave absorber comprises, as primary components, an iron oxide by 39.0-45.0 mol% in terms of FeO, and a zinc oxide by 16.0-20.0 mol% in terms of ZnO with the balance consisting of a manganese oxide. The ferrite composition further comprises, as sub-components, at least a silicon oxide by 50-200 ppm by weight in terms of SiO, and a calcium oxide by 200-2500 ppm by weight in terms of CaO to 100 wt% of the primary components.SELECTED DRAWING: None
【課題】１００〜４００ＭＨｚの高周波数帯域において高い反射減衰特性を有し、耐チッピング性に優れ、低コストである電波吸収体および当該電波吸収体用のフェライト組成物を提供する。【解決手段】酸化鉄をＦｅ２Ｏ３換算で３９．０〜４５．０モル％、酸化亜鉛をＺｎＯ換算で１６．０〜２０．０モル％を含有し、残部が酸化マンガンで構成される主成分を有し、前記主成分１００重量％に対して、副成分として、少なくとも酸化珪素をＳｉＯ２換算で５０〜２００重量ｐｐｍ、酸化カルシウムをＣａＯ換算で２００〜２５００重量ｐｐｍ含有する電波吸収体用のフェライト組成物。【選択図】なし
FERRITE COMPOSITION FOR ELECTROMAGNETIC WAVE ABSORBER, AND ELECTROMAGNETIC WAVE ABSORBER
PROBLEM TO BE SOLVED: To provide: an electromagnetic wave absorber which has high reflection and attenuation properties in a high frequency band of 100-400 MHz and which is superior in endurance against chipping and low in cost; and a ferrite composition for such an electromagnetic wave absorber.SOLUTION: A ferrite composition for an electromagnetic wave absorber comprises, as primary components, an iron oxide by 39.0-45.0 mol% in terms of FeO, and a zinc oxide by 16.0-20.0 mol% in terms of ZnO with the balance consisting of a manganese oxide. The ferrite composition further comprises, as sub-components, at least a silicon oxide by 50-200 ppm by weight in terms of SiO, and a calcium oxide by 200-2500 ppm by weight in terms of CaO to 100 wt% of the primary components.SELECTED DRAWING: None
【課題】１００〜４００ＭＨｚの高周波数帯域において高い反射減衰特性を有し、耐チッピング性に優れ、低コストである電波吸収体および当該電波吸収体用のフェライト組成物を提供する。【解決手段】酸化鉄をＦｅ２Ｏ３換算で３９．０〜４５．０モル％、酸化亜鉛をＺｎＯ換算で１６．０〜２０．０モル％を含有し、残部が酸化マンガンで構成される主成分を有し、前記主成分１００重量％に対して、副成分として、少なくとも酸化珪素をＳｉＯ２換算で５０〜２００重量ｐｐｍ、酸化カルシウムをＣａＯ換算で２００〜２５００重量ｐｐｍ含有する電波吸収体用のフェライト組成物。【選択図】なし
FERRITE COMPOSITION FOR ELECTROMAGNETIC WAVE ABSORBER, AND ELECTROMAGNETIC WAVE ABSORBER
電波吸収体用のフェライト組成物および電波吸収体
KUBO YOSHIHIRO (author) / WATANABE MASAHIKO (author) / TAKAGAWA KENYA (author)
2016-04-25
Patent
Electronic Resource
Japanese
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