| 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 | en |
| ISSN | 0304-8853 |
| 期刊性質 | 國內 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44156 ) |
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