Synthesize And Research On Nano-composite Ferrite Absorber

Nano-NiZn ferrite, nano-Ba ferrite and nano-NiZnCu ferrite were produced by sol-gel method and their properties were measured. The results of experiments indicate that these compound ferrites have some microwave absorption properties and nano-NiZn ferrite is best than the others in the microwave absorption properties. Then different amount of rare earth cerium was dopted in nano-NiZn ferrrite and nano-NiZnCu ferrite, different amount of rare earth lanthanum was dopted in nano-Ba ferrite. We found that the microwave absorption properties of three kinds of ferrite change as different amount of rare earth dopted.In Ni_0.2Zn_0.8Fe_2-xCe_xO₄ (x=0, 0.01, 0.03, 0.07) four different materials, when the mol ratio of rare earth cerium is 7 % (x=0.07), the microwave absorption property is best. At the same time, the microwave absorption property of x=0.01 is lower than x=0. In Ni_0.25Cu_0.25Zn_0.5Fe_2-xCe_xO₄ (x=0, 0.03, 0.05, 0.07, 0.1) five different materials, when the mol ratio of rare earth cerium is 7% (x=0.07) , the microwave absorption property is best and the value of its biggest absorption peak achieves 29.634dB, the microwave absorption property of x=0.1 is lower than x=0.07. These indicate that the absorption properties of these materials don't change as the...