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1 93/2 化材系 余宣賦 教授 期刊論文 發佈 Formation of crystalline MnFe2O4 powder by flame-combusting freeze-dried citrate precursors , [93-2] :Formation of crystalline MnFe2O4 powder by flame-combusting freeze-dried citrate precursors期刊論文Formation of crystalline MnFe2O4 powder by flame-combusting freeze-dried citrate precursors余宣賦; Yu, Hsuan-fu; 楊尚偉; Yang, Shang-wei淡江大學化學工程與材料工程學系Flame combustion;Magnetic measurement;Citrate precursor;Chemical synthesis;Thermal analysisElsevierJournal of Alloys and Compounds 394(1-2), pp.286-291Crystalline 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 MnFe2
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