Abstract
The Z-type hexaferrite Ba1.5Sr1.5Co2Fe24O41 was synthesized by using a solid state reaction method under various heat-treatment conditions. The crystal structure and magnetic properties at high frequency were characterized by on x-ray diffractometer, network analyzer, vibrating sample magnetometer, and Mossbauer spectrometer. The Ba1.5Sr1.5Co2Fe24O41 samples prepared by using the step calcination (SC12) process showed the considerably improved permeability and magnetic loss compared to those prepared by using the other processes due to the complete formation of Z-type phase from the calcination. When Co2Z sample prepared by using SC12 process was sintered at 1125 °C and cooled at a slow rate, the value of magnetic loss tanδμ remained below 0.1 up to 750 MHz, and at 750 MHz, the values of permeability, permittivity, and dielectric loss were μ′ = 7.9, e′ = 10.9, and tanδe = 0.01, respectively.
Published Version
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