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:Effects of pH and citric acid contents on characteristics of ester-derived BaFe12O19 powder
學年91
學期2
出版(發表)日期2003/04/01
作品名稱Effects of pH and citric acid contents on characteristics of ester-derived BaFe12O19 powder
作品名稱(其他語言)
著者余宣賦; Yu, Hsuan-fu; Huang, Kao-chao
單位淡江大學化學工程與材料工程學系
出版者Elsevier
著錄名稱、卷期、頁數Journal of magnetism and magnetic materials 260(3), pp.455-461
摘要The single domain size of BaFe12O19 powder with crystallite sizes less than 200 nm was produced using a citric acid precursor method. Fe3+ and Ba2+, in a molar ratio of 12, were chelated by COOH− in an aqueous solution. After ethylene glycol additions, esterification, dehydration, and calcination led to the formation of ester-derived BaFe12O19 powder. High pH and/or high citric acid contents in the starting solution are required to complete chelate metallic ions in the solution and to form pure barium ferrite powder at 1073 K. Pure single magnetic domain BaFe12O19 particles of M(30 kOe)≈54 emu/g, Mr≈28 emu/g, and Hc≈3.7 kOe were produced using [citric acid]/[metallic ions]=1.5 and pH⩾7.
關鍵字Barium ferrite;Precursor method;Hard magnets;Magnetic properties;Ceramics
語言英文
ISSN0304-8853
期刊性質國內
收錄於
產學合作
通訊作者
審稿制度
國別中華民國
公開徵稿
出版型式,電子版
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