Solvothermal Synthesis and Electromagnetic Properties of Fe3O4 and Its Zn2+-Substituted Zn1-xFe2+xO4 Nanocrystallines

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (3): 447.

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Solvothermal Synthesis and Electromagnetic Properties of Fe₃O₄ and Its Zn²⁺-Substituted Zn_1-xFe_2+xO₄ Nanocrystallines

YAN Ai-Guo^1,2, LIU Hao-Mei³, LIU Ping-Ting¹, HAO Xi-Hai^1,2, LIU Yue-Jun^1,2*

1. Key Laboratory of Packaging New Material & Technology,
2. College of Packaging & Material,
3. College of Electrical & Information Engineering, Hunan University of Technology, Zhuzhou 412008, China

Received:2009-07-31 Online:2010-03-10 Published:2010-03-10
Contact: LIU Yue-Jun. E-mail: yjliu_2005@126.com
Supported by:
国家自然科学基金(批准号: 10672197)、湖南省杰出青年基金(批准号: 07JJ1001)和印刷工程国家特色专业(批准号: TS10433)资助.

Abstract

Abstract:

Fe₃O₄ and Zn_1-xFe_2+xO₄ nanocrystallines were successfully prepared using NaAc as protective reagents via solvothermal method. The structure, size, morphology and chemical composition of the products were investigated in detail by X-ray diffraction(XRD) and scanning electron microscopy(SEM).The results indicate that the monodisperse nanocrystallines are nanospheres and the averaged size of Zn_0.07Fe_2.93O₄(70 nm) is smaller than that of Fe₃O₄(170 nm). The magnetic properties of the sample were investigated and revealed that the saturation magnetization(54.2 A·m²·kg^-1) of Zn_0.07Fe_2.93O₄ nanocrystalline was smaller than that of Fe₃O₄(81.6 A·m²·kg^-1). The electromagnetic performance and microwave adsorption efficiency of both nanocrystallines were measured by a vector network analyzer(VNA) technique in a frequency region 2—18 GHz. The results indicate that Zn_0.07Fe_2.93O₄ nanocrystallines exhibit better microwave adsorption efficiency. For example, the Zn_0.07Fe_2.93O₄ nanocrystalline, the reflection loss maxium is 19.3 dB, almost equal to the double values of Fe₃O₄ (9.8 dB), and the bandwidth with a reflection loss more than 10 dB is up to 2.5 GHz.

Key words: Fe3O4; Zn1-xFe2+xO4; Nanocrystalline; Solvothermal; Electromagnetic property

TrendMD:

YAN Ai-Guo, LIU Hao-Mei, LIU Ping-Ting, HAO Xi-Hai, LIU Yue-Jun* . Solvothermal Synthesis and Electromagnetic Properties of Fe₃O₄ and Its Zn²⁺-Substituted Zn_1-xFe_2+xO₄ Nanocrystallines[J]. Chem. J. Chinese Universities, 2010, 31(3): 447.

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Solvothermal Synthesis and Electromagnetic Properties of Fe₃O₄ and Its Zn²⁺-Substituted Zn_1-xFe_2+xO₄ Nanocrystallines

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