影响因子：5.2
DOI码：10.1016/j.ceramint.2019.12.073
发表刊物：Ceramic International
关键字：Ga substitutionMg–Cd compositesMiniaturizationHigh radiation efficiency
摘要：Mg ferrites are essential to stabilize the spinel structure of magnetic-dielectric composites. This study investigates the effect of Ga ions on the magnetic and dielectric properties and low-loss characteristics of Mg–Cd composites sintered at low temperature with the addition of 2.5 wt% Bi2O3. The variation in the Ga substitution of Fe at the octahedral site, with x increasing from 0.00 to 0.18 (Mg0.8Cd0.2Fe2-xGaxO4), increases magnetization, which plays the key role in determining the permeability. The real part of the permeability (μ′) of the Ga-substituted ferrites was reported to increase monotonically from 10 H/m to 56 H/m. Meanwhile, the real part of the permittivity (ε′) was optimized by the Ga ions. Consequently, relatively matching impedance factor (Z ≈ 1.34) and wideband characteristic factor (BWR ≈ 2.5 × 10−3) were obtained to achieve miniaturization and high radiation performance of antennas. Additionally, enhanced magnetization (Ms = 22.32 emu/g, Hc = 55.07 Oe) as well as magnetic (tanδμ~10−2) and dielectric tangents (tanδε~10−4-10−3) of low orders of magnitude promise outstanding operating performance in the high-frequency region.
学科门类：工学
文献类型：J
卷号：445
期号：9
页面范围：12035-12040
ISSN号：0272-8842
是否译文：否
发表时间：2019-05-20
发布期刊链接：https://doi.org/10.1016/j.ceramint.2019.12.073