About this Materials Science article

Enhanced gyromagnetic properties of NiCuZn ferrite ceramics for LTCC applications by adjusting MnO2-Bi2O3 substitution by Yan Yang; Jie Li; Huaiwu Zhang; Lichuan Jin; Fang Xu; Gongwen Gan; Gang Wang; Dandan Wen is a Materials Science article available to read on EtoBox.

The demand for high performance microwave devices is increasingly promoting the development of miniaturization, integration and multifunctionalization. Here, a uniform and dense NiCuZn ferrite ceramic with high saturation magnetization and low ferromagnetic resonance linewidth was obtained at 950 °C by adjusting the MnO 2 -Bi 2 O 3 composite additives. The MnO 2 -Bi 2 O 3 composite additives were composed of 0.5 wt% MnO 2 and x wt% Bi 2 O 3 (x = 0.0, 0.5, 1.0, 1.5, 2.0, and 3.0). The phase structure, microstructures and magnetic properties were systematically studied by means of modern measurement techniques. SEM images reveal that appropriate MnO 2 -Bi 2 O 3 additions can promote grain growth and reduce sintering temperatures, which is very advantageous for LTCC technology. In addition, the content of MnO 2 -Bi 2 O 3 additives can significantly reduce ferromagnetic resonance linewidth (FMR) by promoting grain growth and densification at low temperatures. Finally, a uniform and compact NiCuZn ferrite ceramic with an improved 4πM s (~3812.5 Gauss), a narrow ΔH (~144.6 Oe), and a reduced H c (~85.2 A/m) were obtained (at 950 °C) by adding the optimal volume of Bi 2 O 3 additive. It i

Author

Yan Yang; Jie Li; Huaiwu Zhang; Lichuan Jin; Fang Xu; Gongwen Gan; Gang Wang; Dandan Wen

Publisher

Elsevier BV

Published

2018

Language

EN

Field

Materials Science (Physical Sciences)