Abstract
Abstract The effects of microstructure on the magnetic and dielectric properties of Mg0.6Cd0.4Co0.05Fe1.95O4 spinel ferrites with the addition of 2.5 wt% Bi2O3 are investigated mainly for high frequency applications. The measurement results reveal that composites processed via low temperature co-fired ceramic (LTCC) technology at different sintering temperatures (900 °C, 920 °C, 930 °C, and 940 °C) possess excellent equivalent permeability (μ′) and permittivity (e′) (at 940 °C, μ′≈e′≈25), over a long frequency range from 1 to 100 MHz. The results also indicate that densification sintering results in ultra low dielectric loss tanδe and magnetic loss tanδμ (tanδe≈0.003, tanδμ≈0.035). In addition, the samples present enhanced magnetic properties, such as high saturation magnetization (approximately 37.94 emu/g) and appropriate coercivity (approximately 60.5 Oe) at 940 °C. This research presents the prospect of wide application of Mg Cd ferrites in high frequency applications.
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