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:Formation of crystalline MnFe2O4 powder by flame-combusting freeze-dried citrate precursors
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學期
出版(發表)日期2005/05/01
作品名稱Formation of crystalline MnFe2O4 powder by flame-combusting freeze-dried citrate precursors
作品名稱(其他語言)
著者余宣賦; Yu, Hsuan-fu; 楊尚偉; Yang, Shang-wei
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 Alloys and Compounds 394(1-2), pp.286-291
摘要Crystalline MnFe2O4 particles with particle sizes in submicrometers were produced by flame-combusting the freeze-dried citrate precursors. Aqueous solutions of nitrates, containing Fe3+ and Mn2+ chelated by citric acid and with controlled pH using NH4OH additions, were freeze-dried. The freeze-dried citrate precursors were then thermally treated by combustion using a butane-induced flame, to decompose organic constituents and to form ferrites. The resultant particles were characterized using XRD, TG, DSC, FT-IR, SEM, and SQUID. At pH ≥ 3, the flame-combusted specimens were composed of crystalline MnFe2O4 with average crystallite sizes of 28.5 ± 1.2 nm and exhibited magnetic characteristics of 48.7 ± 1.5 emu/g in magnetization measured at 1.5 kOe, 13.4 ± 0.2 emu/g in remanence magnetization, and 55.7 ± 3.9 Oe in coercive force.
關鍵字Flame combustion;Magnetic measurement;Citrate precursor;Chemical synthesis;Thermal analysis
語言英文
ISSN0925-8388
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