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

標題:Mn-Zn Ferrites Powder Preparation by Citric Acid Precursor Method
學年88
學期1
發表日期1999/11/26
作品名稱Mn-Zn Ferrites Powder Preparation by Citric Acid Precursor Method
作品名稱(其他語言)
著者Yu, Husan-Fu; Pai, Hao-Cheng
作品所屬單位淡江大學化學工程學系
出版者
會議名稱八十八年度化工學會年會及研討會專輯化學工程技術研討會
會議地點高雄, 臺灣
摘要A citric acid precursor method was used to prepare MnFe/sub 2/O/sub 4/ and (Mn,Zn)Fe/sub 2/O/sub 4/ powder. Citric acid was added into an aqueous solution, which contained nitrates of iron, manganese, or zinc in stoichiometric ratios to form the required ferrites, to chelate the metallic ions. The pH values of stating aqueous solutions were adjusted using NH/sub 4/OH. After adding glycol into the solution and raising the solution temperature to 353 K, esterification caused the formation of the required solid precursors. The dried solid precursors so obtained were then pyrolyzed to form the corresponding oxides. The characteristics of solid powder were studied using XRD and SEM. Crystalline MnFe/sub 2/O/sub 4/ powder was obtained at 623 K for all pH of the starting solutions used. In air , Mn/sup 2+/ in MnFe/sub 2/O/sub 4/ powder was oxidized to form Mn/sub 3+/ at temperatures about 873 K, resulting in phase segregation. Zn/sup 2+/ or Mg/sup 2+/ was added into the compositions and succeeded, in some extent, preventing the oxidation of Mn/sup 2+/. Crystalline (Mn,Zn)Fe/sub 2/O/sub 4/ powder was obtained at 1,273 K for all pH range of starting solutions used.
關鍵字前趨物法;肥粒鐵;;;檸檬酸;Precursor Method;Ferrite;Manganese;Zinc;Citric Acid
語言英文
收錄於
會議性質
校內研討會地點
研討會時間19991126~19991127
通訊作者
國別中華民國
公開徵稿Y
出版型式紙本
出處八十八年度化工學會年會及研討會專輯化學工程技術研討會論文集
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