出版日期：2003-04-01 00:00:00

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：en

ISSN：0304-8853

期刊性質：國內

審稿制度：否

國別：TWN

出版型式：電子版