文化大學機構典藏 CCUR:Item 987654321/35939
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    Please use this identifier to cite or link to this item: https://irlib.pccu.edu.tw/handle/987654321/35939


    Title: A comparative study of the magnetic and microwave properties of Al3+ and In3+ substituted Mg-Mn ferrites
    Authors: Tsay, CY (Tsay, Chien-Yie)
    Liang, SC (Liang, Shan-Chien)
    Lei, CM (Lei, Chien-Ming)
    Chang, CC (Chang, Chung-Chieh)
    Contributors: 化材系
    Keywords: Powders
    solid state reaction
    Magnetic properties
    Ferrites
    Spinels
    Functional applications
    Date: 2016-03
    Issue Date: 2017-04-17 10:05:59 (UTC+8)
    Abstract: The effect of substitution of diamagnetic Al3+ and In3+ ions for partial Fe3+ ions in a spinel lattice on the magnetic and microwave properties of magnesium-manganese (Mg-Mn) ferrites has been studied. Three kinds of Mg-Mn based ferrites with compositions of Mg0.9Mn0.1Fe2O4, Mg0.9Mn0.1Al0.1Fe1.9O4, and Mg0.9Mn0.1In0.1Fe1.9O4 were prepared by the solid-state reaction route. Each mixture of high-purity starting materials (oxide powders) in stoichiometric amounts was calcined at 1100 degrees C for 4 h, and the debinded green compacts were sintered at 1350 degrees C for 4 h. XRD examination confirmed that the sintered ferrite samples had a single-phase cubic spinel structure. The incorporation of Al3+ or In3+ ions in place of Fe3+ ions in Mg-Mn ferrites increased the average particle size, decreased the Curie temperature, and resulted in a broader resonance linewidth as compared to un-substituted Mg-Mn ferrites in the X-band. In this study, the In3+ substituted Mg-Mn ferrites exhibited the highest saturation magnetization of 35.7 emu/g, the lowest coercivity of 4.1 Oe, and the highest Q x f value of 1050 GHz at a frequency of 6.5 GHz. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
    Relation: CERAMICS INTERNATIONAL 卷: 42 期: 4 頁碼: 4748-4753
    Appears in Collections:[化學工程與材料工程學系暨碩士班] 期刊論文

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