Influence of Co/Fe ratio on the oxide phases in nanoparticles of CoxFe3-xO4

被引：48

作者：

Dippong, Thomas ^{[1
]}

Levei, Erika Andrea ^{[2
]}

Borodi, Gheorghe ^{[3
]}

Goga, Firuta ^{[4
]}

Tudoran, Lucian Barbu ^{[5
]}

机构：

[1] Tech Univ Cluj Napoca, North Univ Ctr Baia Mare, Dept Biol & Chem, Baia Mare 430122, Romania

[2] INCDO INOE 2000, Res Inst Analyt Instrumentat, Cluj Napoca 400293, Romania

[3] Natl Inst Res & Dev Isotop & Mol Technol, Cluj Napoca 400293, Romania

[4] Univ Babes Bolyai, Fac Chem & Chem Engn, Cluj Napoca 400084, Romania

[5] Univ Babes Bolyai, Fac Biol & Geol, Cluj Napoca 400015, Romania

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2015年 / 119卷 / 02期

关键词：

Nanomaterials; Cobalt ferrite; Fe/Co molar ratio; Thermal analysis; COBALT FERRITE; MAGNETIC-PROPERTIES; IRON COBALTITES; DECOMPOSITION;

D O I：

10.1007/s10973-014-4280-7

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The CoxFe3-xO4 oxidic system was synthesized by a modified redox reaction between cobalt nitrate (II), iron nitrate (III) and 1,4-butanediol using different Fe/Co ratios. The synthesized precursors were subjected to advanced thermal treatment and studied by thermal analysis, X-ray diffraction, Fourier transformed infrared spectrometry and transmission electron microscopy. The results showed that by the thermal decomposition of the carboxylate precursors, cobalt ferrite nanocrystallites were obtained. In the samples with Fe excess, beside cobalt ferrite, iron oxides were also formed, while in samples with Co excess, cobalt oxides occur as secondary phase. The data obtained from transmission electron microscopy images, X-ray diffractograms and crystallite size evaluation from powder diffraction pattern and Scherrer equation indicated the synthesis of nanomaterials with particle size below 100 nm.

引用

页码：1001 / 1009

页数：9

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