教師資料查詢 | 類別: 期刊論文 | 教師: 余宣賦 Yu, Hsuan-fu (瀏覽個人網頁)

標題:BaFe12O19 powder with high magnetization prepared by acetone-aided coprecipitation
學年102
學期1
出版(發表)日期2013/09/01
作品名稱BaFe12O19 powder with high magnetization prepared by acetone-aided coprecipitation
作品名稱(其他語言)
著者Yu, Hsuan-fu
單位淡江大學化學工程與材料工程學系
出版者Amsterdam: Elsevier B.V.
著錄名稱、卷期、頁數Journal of Magnetism and Magnetic Materials 341, pp.79-85
摘要BaFe12O19 particles with high magnetization were produced using an acetone-aided coprecipitation process. An aqueous solution of iron and barium nitrates, in an Fe3+/Ba2+ molar ratio of 12, was added in a stirred precipitation liquid medium composed of H2O, CH3(CO)CH3 and NH4OH. After reacting metallic ions with ammonia, the precipitates were formed, centrifugally filtered, freezing-dried and calcined. Effects of amount of the acetone in the precipitation liquid medium on the formation of crystalline BaFe12O19 were investigated. The presence of acetone in the precipitation liquid medium can greatly promote formation of the crystalline BaFe12O19 at temperature as low as 650 oC and can enhance magnetization of the derived particles. On the other hand, raising the calcination temperature can effectively accelerate development in crystallite morphology and magnetic characters of the barium hexaferrites. While the barium hexaferrite powder obtained without acetone additions and calcined at 1000 oC had magnetization (measured at 50 kOe; M(50 kOe)) of 63.5 emu/g, remanence magnetization (Mr) of 31.3 emu/g and coercivity (Hc) of 4.7 kOe, the single magnetic domain sizes BaFe12O19 powder with M(50 kOe) of 70.6 emu/g, Mr of 34.4 emu/g and Hc of 3.7 kOe was produced at 1000 oC, using a precipitation liquid medium of 64 Vol.% acetone.
關鍵字Barium hexaferrite;Coprecipitation;Magnetic property;Magnetization;Hard magnets
語言英文
ISSN0304-8853;1873-4766
期刊性質國外
收錄於SCI;
產學合作
通訊作者Yu, Hsuan-fu
審稿制度
國別荷蘭
公開徵稿
出版型式,電子版,紙本
相關連結
Google+ 推薦功能,讓全世界都能看到您的推薦!