Morphology-controlled synthesis, characterization and microwave absorption properties of nanostructured 3D CeO2

被引：103

作者：

Wu, Guanglei ^{[1
]}

Cheng, Yonghong ^{[1
]}

Xiang, Feng ^{[2
]}

Jia, Zirui ^{[1
]}

Xie, Qian ^{[1
]}

Wu, Gaoqing ^{[1
]}

Wu, Hongjing ^{[3
]}

机构：

[1] Xi An Jiao Tong Univ, Sch Elect Engn, State Key Lab Elect Insulat & Power Equipment, CNRE, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, ICDR, EMRL, Xian 710049, Peoples R China

[3] Northwestern Polytech Univ, Dept Appl Phys, Xian 710072, Peoples R China

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2016年 / 41卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

CeO2; Microwave absorption; Dielectric loss; NANOCRYSTALLINE CEO2; HYDROTHERMAL SYNTHESIS; CATALYTIC-ACTIVITY; NANOPARTICLES; TEMPERATURE; OXIDES; MICROSPHERES; EFFICIENCY; OXIDATION; NANOPOLES;

D O I：

10.1016/j.mssp.2015.06.077

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nanostructured 3D CeO2 have been synthesized by using PEG 2000 assisted simple hydrothermal technique. The impact of this novel approach on the structure, morphology, spectroscopy, complex permittivity and permeability was discussed. CeO2 was studied by employing X-ray diffraction (XRD), Raman spectra, field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TG) and vector network analyzer. It can be seen that the microspheres of 1-3 mu m in diameter were prepared at 600 degrees C with a mole ratio of 2:1, while the decreasing concentration of PEG-2000 resulted in the appearance of dim side-shape geometry. Obviously, the morphology of the synthesized CeO2 gradually changed from sphere with relatively smooth to irregular side-shape annealed at 600 degrees C with the increase of mole ratio for reactants. The electromagnetic (EM) wave absorption properties of the synthesized CeO2 were investigated over the range from 2 to 16 GHz, and minimum reflection loss (RL) with - 19.3 dB was observed at 15.8 GHz with the thickness of 2.0 mm. This phenomenon may be attributed to both intrinsic characteristic of CeO2 and preparation with the function of PEG-2000. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：6 / 11

页数：6

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