title: Synthesis of Highly Uniform and Compact Lithium Zinc Ferrite Ceramics via an Efficient Low Temperature Approach.
abstract: LiZn ferrite ceramics with high saturation magnetization (4πMs) and low ferromagnetic resonance line widths (ΔH) represent a very critical class of material for microwave ferrite devices. Many existing approaches emphasize promotion of the grain growth (average size is 10-50 μm) of ferrite ceramics to improve the gyromagnetic properties at relatively low sintering temperatures. This paper describes a new strategy for obtaining uniform and compact LiZn ferrite ceramics (average grains size is ∼2 μm) with enhanced magnetic performance by suppressing grain growth in great detail. The LiZn ferrites with a formula of Li0.415Zn0.27Mn0.06Ti0.1Fe2.155O4were prepared by solid reaction routes with two new sintering strategies. Interestingly, results show that uniform, compact, and pure spinel ferrite ceramics were synthesized at a low temperature (∼850 °C) without obvious grain growth. We also find that a fast second sintering treatment (FSST) can further improve their gyromagnetic properties, such as higher 4πMsand lower ΔH. The two new strategies are facile and efficient for densification of LiZn ferrite ceramics via suppressing grain growth at low temperatures. The sintering strategy reported in this study also provides a referential experience for other ceramics, such as soft magnetism ferrite ceramics or dielectric ceramics.
authors.affiliation: Center for Applied Chemistry, University of Electronic Science and Technology of China , Chengdu 610054, China.|State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Xu
authors.affiliation: Center for Applied Chemistry, University of Electronic Science and Technology of China , Chengdu 610054, China.|State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Yulong
authors.identifier: http://orcid.org/0000-0003-3761-7170
authors.initials: Y
authors.lastname: Liao
authors.affiliation: State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Dainan
authors.initials: D
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Tingchuan
authors.initials: T
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Gongwen
authors.initials: G
authors.lastname: Gan
authors.affiliation: State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China , Chengdu 610054, China.
authors.forename: Huaiwu
authors.initials: H
authors.lastname: Zhang