Preparation and Microwave Absorption Properties of Ce-doped BaTiO3

doi:10.3724/SP.J.1077.2008.00891

Abstract

Abstract: Nano-particles of Ce-doped BaTiO₃ were prepared by sol-gel method. The structure, micrograph and microwave absorption properties of the materials were characterized by using X-ray diffraction (XRD), Raman spectroscope, Scanning Electron Microscope (SEM) and vector network analyzer. The BaTiO₃powders doped with different Ce contents have the same crystalline tetragonal structure. With the increase of Ce content, the crystal sizes of the BaTiO₃powders decrease with lattice constants a enlarges and c decreases. Within the bandwidth of 2--18GHz, the reflection loss of 0.2% Ce-doped BaTiO₃ powders is increased and reflection peak has blue shift compared with pure BaTiO₃ powders. Reflection losses of 0.2% Ce-doped BaTiO₃
powders are increased by 15dB and 30dB at 5.8GHz and 7GHz, respectively, and the bandwidth is widened two times. The above shows that Ce-doping can greatly improve the microwave absorption properties of the BaTiO₃powders.

Key words: Ce-doping, BaTiO₃, microwave absorption properties

CLC Number:

TB34

LIU Yan-Kun,TIAN YAN,FENG Yu-Jie,WU Xiao-Wei,HAN Xia-Guang. Preparation and Microwave Absorption Properties of Ce-doped BaTiO₃[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00891.

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Preparation and Microwave Absorption Properties of Ce-doped BaTiO₃

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