出版日期：2005-05-01 00:00:00

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：en

ISSN：0925-8388

期刊性質：國外

審稿制度：否

國別：NLD

出版型式：紙本