低介电常数白钨RSrCe(MoO4)3 (R=Na, K)陶瓷的结构特性、晶格振动及微波介电性能

IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Mengyao Wang , Yuan Nie , Ziqi Zhao , Enxiang Guan , Ruzhong Zuo , Huanfu Zhou , Fangyi Huang
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引用次数: 0

摘要

本研究通过固相反应方法成功合成了新型低介电常数NaSrCe(MoO4)3 (NSCM)和KSrCe(MoO4)3 (KSCM)微波介质陶瓷。XRD谱图的Rietveld细化结果表明,具有四方白钨矿结构(空间群I41/a)的NSCM和KSCM均为单相。XPS拟合结果表明,NSCM和KSCM陶瓷中的Ce离子同时存在于+3价态和+4价态。利用激光共聚焦拉曼光谱研究了两种陶瓷的本征介电特性。NSCM(875℃)和KSCM(850℃)样品表现出优异的微波介电性能:εr =10.86, Q × f =55844 GHz, τf = -53.89 ppm/℃,εr =9.28, Q × f =70716 GHz, τf = -58.46 ppm/℃,表明这两种陶瓷在6g通信领域具有良好的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Structural characteristics, lattice vibration and microwave dielectric properties of low-permittivity scheelite RSrCe(MoO4)3 (R=Na, K) ceramics with low sintering temperature
In this study, novel low-permittivity NaSrCe(MoO4)3 (NSCM) and KSrCe(MoO4)3 (KSCM) microwave dielectric ceramics are successfully synthesized via the solid-state reaction method. Rietveld refinement results of XRD patterns show that NSCM and KSCM with a tetragonal scheelite structure (space group I41/a) are single-phase. The results of XPS fitting show that the Ce ions in NSCM and KSCM ceramics coexist in both + 3 and + 4 valence states. Laser confocal Raman spectroscopy is utilized to investigate the intrinsic dielectric properties of the two ceramics. The NSCM (875 ℃) and KSCM (850 ℃) samples exhibit superior-grade microwave dielectric properties: εr = 10.86, Q × f = 55844 GHz, τf = -53.89 ppm/℃, and εr = 9.28, Q × f = 70716 GHz, τf = -58.46 ppm/℃, indicating that these two ceramics are highly promising for application in the 6 G communication domain.
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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