Dielectric properties of Sm2GeO5 ceramics at microwave frequencies and their influencing factors

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.227

Yuan Nie, Yanjun Liu, Ziqi Zhao, Wenjie Zhang, Weilin Chen, Mengyao Wang, Fangyi Huang, Xiuli Chen, Huanfu Zhou

{"title":"Dielectric properties of Sm2GeO5 ceramics at microwave frequencies and their influencing factors","authors":"Yuan Nie, Yanjun Liu, Ziqi Zhao, Wenjie Zhang, Weilin Chen, Mengyao Wang, Fangyi Huang, Xiuli Chen, Huanfu Zhou","doi":"10.1016/j.ceramint.2025.06.227","DOIUrl":null,"url":null,"abstract":"<div><div>In this study, low-permittivity Sm2GeO5 ceramics were synthesized via solid-state reaction. XRD and Rietveld refinement confirmed a monoclinic crystal structure (space group P21/c). SEM was employed to analyze grain growth. The microwave dielectric properties were systematically investigated, revealing that the void ratio critically influences the dielectric constant of the samples. The Q×f values of the ceramics exhibited a strong dependence on the void fraction, packing fraction, and lattice energy. Meanwhile, the valence state of B-site cations played a critical role in determining the temperature stability. When sintered at 1400 °C, the ceramics achieved a high relative density of 95.74 %, further supporting their optimized microwave dielectric performance. Excellent microwave dielectric properties were achieved: εr = 13.72, Q×f = 43723 GHz, τf = −84.21 ppm/°C. This study provides a comprehensive analysis of the key factors influencing the microwave dielectric properties of Sm2GeO5 ceramics. The excellent microwave dielectric properties of Sm2GeO5 ceramics indicate that they have promising applications in radar, mobile communication base stations, and satellite navigation.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39946-39952"},"PeriodicalIF":5.6000,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0272884225028846","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, low-permittivity Sm₂GeO₅ ceramics were synthesized via solid-state reaction. XRD and Rietveld refinement confirmed a monoclinic crystal structure (space group P2₁/c). SEM was employed to analyze grain growth. The microwave dielectric properties were systematically investigated, revealing that the void ratio critically influences the dielectric constant of the samples. The Q×f values of the ceramics exhibited a strong dependence on the void fraction, packing fraction, and lattice energy. Meanwhile, the valence state of B-site cations played a critical role in determining the temperature stability. When sintered at 1400 °C, the ceramics achieved a high relative density of 95.74 %, further supporting their optimized microwave dielectric performance. Excellent microwave dielectric properties were achieved: ε_r = 13.72, Q×f = 43723 GHz, τ_f = −84.21 ppm/°C. This study provides a comprehensive analysis of the key factors influencing the microwave dielectric properties of Sm₂GeO₅ ceramics. The excellent microwave dielectric properties of Sm₂GeO₅ ceramics indicate that they have promising applications in radar, mobile communication base stations, and satellite navigation.

查看原文本刊更多论文

微波频率下Sm2GeO5陶瓷介电性能及其影响因素

本研究采用固相反应法制备了低介电常数Sm2GeO5陶瓷。XRD和Rietveld细化证实了单斜晶结构（空间群P21/c）。采用扫描电镜（SEM）对晶粒生长进行了分析。系统地研究了样品的微波介电性能，揭示了空穴比对样品介电常数的影响。陶瓷的Q×f值与孔隙率、填充率和晶格能有很大的关系。同时，b位阳离子的价态对温度稳定性起关键作用。在1400℃烧结时，陶瓷的相对密度高达95.74%，进一步支持了其优化的微波介电性能。获得了优异的微波介电性能：εr = 13.72, Q×f = 43723 GHz, τf =−84.21 ppm/°C。本研究全面分析了影响Sm2GeO5陶瓷微波介电性能的关键因素。Sm2GeO5陶瓷优异的微波介电性能表明其在雷达、移动通信基站和卫星导航等领域具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.