Structural characteristics, P-V-L theory, Raman spectra, and microwave dielectric properties of (La1-xNdx)2(Zr0.96Ti0.04)3(MoO4)9 ceramics for LTCC applications

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2024-10-09 DOI:10.1016/j.jeurceramsoc.2024.116974

Yuan-Bin Chen, Siyi Xiong

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引用次数: 0

Abstract

This article explores the microwave dielectric properties of (La_1-xNd_x)₂(Zr_0.96Ti_0.04)₃(MoO₄)₉ (x=0.1,0.3,0.5, and 0.7) ceramics prepared by solid-state reaction. Utilizing the Rietveld refinement technique in XRD, the sample is identified as a trigonal crystal system belonging to the

R \bar{3} c

space group. SEM analysis indicates that relative density has a significant impact on the ε_r and Q×f of ceramics. The Q×f values of ceramics are closely related to the FWHM of the Raman spectra. At 750℃, (La_0.5Nd_0.5)₂(Zr_0.96Ti_0.04)₃(MoO₄)₉ ceramic exhibited excellent dielectric properties: ε_r = 10.4 (±0.08), Q×f = 149,300 (±3211) GHz, τ_f = −34.8 (±0.7) ppm/℃. To gain a deeper understanding of the intrinsic mechanisms governing the microwave dielectric properties of ceramics, analysis based on the P-V-L theory reveals that the La(Nd)-O bond and Mo-O bond contribute significantly to ε_r and Q×f, respectively.

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用于 LTCC 应用的 (La1-xNdx)2(Zr0.96Ti0.04)3(MoO4)9 陶瓷的结构特征、P-V-L 理论、拉曼光谱和微波介电性能

本文探讨了固态反应制备的 (La1-xNdx)2(Zr0.96Ti0.04)3(MoO4)9（x=0.1、0.3、0.5 和 0.7）陶瓷的微波介电性能。利用 XRD 的里特维尔德细化技术，样品被确定为属于 R3¯c 空间群的三方晶系。SEM 分析表明，相对密度对陶瓷的 εr 和 Q×f 有显著影响。陶瓷的 Q×f 值与拉曼光谱的 FWHM 值密切相关。在 750℃时，(La0.5Nd0.5)2(Zr0.96Ti0.04)3(MoO4)9 陶瓷表现出优异的介电性能：εr = 10.4 (±0.08)，Q×f = 149,300 (±3211) GHz，τf = -34.8 (±0.7) ppm/℃。为了更深入地了解陶瓷微波介电性能的内在机制，基于 P-V-L 理论的分析表明，La(Nd)-O 键和 Mo-O 键分别对 εr 和 Q×f 起着重要作用。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.