MAGNETIC CERAMIC AND PRODUCTION METHOD OF MAGNETIC CERAMIC

To provide a magnetic ceramic exhibiting high effects in comparison with the conventional ceramic, by using nano-sized ruthenium or rhodium.SOLUTION: The magnetic ceramic is produced by adding water to the mixture of hydroxyapatite or fluoroapatite, calcium pyrophosphate, cristobalite, and alumina, then kneading the resulting mixture, adding orthophosphoric acid to the kneaded mixture, adding potassium chloride, Na-tetrasilicic mica, and L-ascorbic acid to the resulting mixture, kneading the resulting mixture, further, charging a magnetite as a magnetic material, manganese oxide, nano-sized ruthenium or rhodium, and sodium carbonate to the kneaded mixture, kneading the resulting mixture while the reaction heat caused by the addition of the orthophosphoric acid is generated, charging magnesium oxide to the kneaded mixture after completion of reaction foaming, kneading the resulting mixture, after the temperature of the kneaded mixture becomes ordinary temperature, pulverizing the solidified kneaded material, again adding water to the pulverized material and kneading, charging zinc oxide, metal titanium or titanium oxide and a cellulose as a binder to the kneaded mixture, kneading the resulting mixture to increase the viscosity, curing and forming the kneaded mixture, drying and firing the formed body, and finally subjecting the fired body to a magnetization treatment.SELECTED DRAWING: Figure 1 【課題】ナノ化されたルテニウム若しくはロジウムを用いることにより、従来のセラミックスに比べて効果が高い磁気セラミックスの提供。【解決手段】ヒドロキシアパタイト若しくはフッ素アパタイトと、ピロリン酸カルシウム、クリストバライト、アルミナとを加水して混練した後、オルトリン酸を加え反応熱が生じている間に、塩化カリウム、Ｎａテトラシリシックマイカ、Ｌ−アスコルビン酸を混練し、さらに、磁性材としてマグネタイトと、酸化マンガンと、ナノ化されたルテニウム若しくはロジウムと、炭酸ナトリウムを入れて混練し、反応発泡終了後に酸化マグネシウムを入れ混練し、反応熱が常温となった後に、固形化した混練物を粉砕し、再度加水して混練し、酸化亜鉛と金属チタン若しくは酸化チタンと、結合材としてセルロースを入れ混練し、粘性を出して養生し、次に成形し、成形後乾燥し、焼成し、さらに磁結後磁気処理を行うことによる磁気セラミックス。【選択図】図１