Cd-substituted Mg composites with dual-equivalent permeability and permittivity for high-frequency miniaturization antennas

Impact Factor:5.2

DOI number:10.1016/j.ceramint.2019.10.165

Journal:Ceramic International

Key Words:Mg1-xCdxCo0.05Fe1.95O4 compositesEnhanced magnetic propertiesDual-equivalent mu ' and epsilon 'High miniaturization factorsLow loss factors

Abstract:Spinel Mg ferrites Mg1-xCdxCo0.05Fe1.95O4 (x=0.0, 0.2, 0.3 and 0.4) as potential agents for the miniaturization of high frequency antennas are presented. All the synthesized compositions were experimentally revealed to possess pure spinel phase. Dual-equivalent permeability and permittivity (mu' approximate to 26, epsilon' approximate to 25, x = 0.3 and mu' approximate to 29, epsilon' approximate to 28, x = 0.4) from 5 to 100 MHz can be achieved by introducing Cd2+ ions, yielding large miniaturization factors of up to 25 and 28. To figure out the effects of Cd2+ ions substitution on magnetic and dielectric properties, the change in microstructure is mainly investigated. Meanwhile, enhanced magnetic properties including upward saturation magnetization (Ms) (approximately 47.60 emu/g) and reduced coercivity (approximately 54.22 Oe) are obtained due to increased grain size and denser microstructure arrangements reflected from scanning electron microscopy images. With low magnitude order of magnetic and dielectric losses factors (tan delta(epsilon) reaches 10(-4), tan delta(mu) reaches 10(-2)), the composites can potentially exhibit high operating efficiencies at high frequencies.

Indexed by:SCI

Discipline:Engineering

Document Type:J

Volume:46

Issue:4

Page Number:4410-4415

ISSN No.:0272-8842

Translation or Not:no

Date of Publication:2020-03-03

Included Journals:SCI

Links to published journals:https://www.sciencedirect.com/science/article/pii/S0272884219330287?via%3Dihub