A MAGNETIC CERAMIC COMPOSITION FOR MICROWAVE DEVICE, A MAGNETIC CERAMIC FOR MICROWAVE DEVICES THEREFROM AND A PREPARATION METHOD THEREOF

摘要

The present invention relates to a material for a microwave band part used in electronic devices for civil and industrial use, which is easy to control saturation magnetization and has a low ferrimagnetic resonance half width and a good Curie temperature, a microwave element And a method for producing the same.;The magnetic ceramic composition for a microwave device according to the present invention comprises a yttrium oxide, a ferric oxide, a tin oxide, an aluminum oxide, and a calcium source as main components and is represented by the following composition formula. The magnetic ceramic for a microwave device according to the present invention is characterized by the following composition formula , Yttrium oxide, iron oxide, tin oxide, aluminum oxide, and calcium carbonate (or calcium oxide), followed by molding and sintering. The resulting product has a saturation magnetization of 100 to 1,800 G and a saturation magnetization of 3 G / A temperature coefficient and a ferrimagnetic resonance half width of 60 Oe or less:;Y _3-x Ca _x Sn _x Fe _5-y Al _y O ₁₂;Here, 0.1? X? 1 and 0.2? Y? 1.5.