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      Microwave Sintering and Microwave Dielectric Properties of (1– x)Ca 0.61La 0.26TiO 3- xNd(Mg 0.5Ti 0.5)O 3 Ceramics

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          Abstract

          The (1– x)Ca 0.61La 0.26TiO 3- xNd(Mg 0.5Ti 0.5)O 3 [(1– x)CLT- xNMT, x = 0.35~0.60] ceramics were prepared via microwave sintering. The effects of sintering temperature and composition on the phase formation, microstructure, and microwave dielectric properties were investigated. The results show that the microwave sintering process requires a lower sintering temperature and shorter sintering time of (1– x)CLT- xNMT ceramics than conventional heating methods. All of the (1– x)CLT- xNMT ceramics possess a single perovskite structure. With the increase of x, the dielectric constant ( ε) shows a downward trend; the quality factor ( Qf) drops first and then rises significantly; the resonance frequency temperature coefficient ( τ f ) keeps decreasing. With excellent microwave dielectric properties ( ε = 51.3, Qf = 13,852 GHz, τ f = −1.9 × 10 −6/°C), the 0.65CLT-0.35NMT ceramic can be applied to the field of mobile communications.

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            Dielectric and Structural Characteristics of Ba- and Sr-based Complex Perovskites as a Function of Tolerance Factor

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              Effect of Porosity and Grain Size on the Microwave Dielectric Properties of Sintered Alumina

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                17 January 2021
                January 2021
                : 14
                : 2
                Affiliations
                [1 ]Key Laboratory for Microstructural Control of Metallic Materials of Jiangxi Province, Nanchang Hangkong University, Nanchang 330063, China; 1901085204103@ 123456stu.nchu.edu.cn (S.Y.); 27014@ 123456nchu.edu.cn (C.L.)
                [2 ]School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China; 1801085204026@ 123456stu.nchu.edu.cn (J.L.); 2001085600127@ 123456stu.nchu.edu.cn (C.F.); 27008@ 123456nchu.edu.cn (Y.A.)
                Author notes
                [* ]Correspondence: lbl@ 123456nchu.edu.cn ; Tel.: +86-13-870-881-860
                Article
                materials-14-00438
                10.3390/ma14020438
                7830862
                33477369
                f89e54c2-9d8f-4b76-ae38-41a359dc0f6a
                © 2021 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

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