Preparation and Microwave Absorption Properties of Ce-doped BaTiO 3 : Preparation and Microwave Absorption Properties of Ce-doped BaTiO 3

Nano-particles of Ce-doped BaTiO_3 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 an- alyzer.The BaTiO_3 powders doped with different Ce contents have the same crystalline tetragonal structure.With the increase of Ce content,the crystal sizes of the BaTiO_3 powders decrease with lattice constants a enlarges and c decreases.Within the bandwidth of 2-18GHz,the reflection loss of 0.2% Ce-doped BaTiO_3 powders is increased and reflection peak has blue shift compared with pure BaTiO_3 powders.Reflection losses of 0.2% Ce-doped BaTiO_3 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 BaTiO_3 powders.