Effect of In3+ ion substitution on the structure and magnetic-dielectric properties of BiCaZrV-YIG ferrites sintered at low temperature

Bi 1.2 Ca 1.2 Y 0.6 Zr 0.4 In x V 0.4 Fe 4.2-x O 12 (x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5) ceramics were prepared using a conventional ceramic process at a reduced sintering temperature. The phase composition, microstructure, and electromagnetic properties of the as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy equipped with energy spectrometer, vibrating sample magnetometry, and precision impedance analyzer.The results indicated that the substitution of Bi 3+ ion effectively reduced the sintering temperature of YIG ferrite, the magnetic-dielectric properties of the YIG ferrite could be precisely tuned by adjusting the content of In 3+ ions. The highly dense ceramic samples with garnet structure were obtained at a sintering temperature of 1020 °C. The sintered sample with x = 0.2 exhibited the optimum comprehensive performance: an average grain size of 3.4 μm, 4π M s of 1184.81 G; and an initial permeability of 78.6, a magnetic loss of 7.06× 10 −3 , and a permittivity of 16.67 at 100 kHz.