{"title":"New Li1.94Cu2.06(MoO4)3 dielectric ceramic for ULTCC applications","authors":"J. Song , M.Y. Li , G.H. Chen","doi":"10.1016/j.ceramint.2025.06.209","DOIUrl":null,"url":null,"abstract":"<div><div><span><span>To achieve the goals of miniaturization, integration and green energy saving of microwave devices, microwave dielectric ceramics must have ultra-low </span>sintering temperature<span> and good dielectric properties<span>. This study systematically investigates the microwave dielectric performances of a novel Li</span></span></span><sub>1.94</sub>Cu<sub>2.06</sub>(MoO<sub>4</sub>)<sub>3</sub>(LCM) ceramic synthesized using the solid-state reaction method. The results indicate a denser and more uniform microstructures contribute to improved dielectric properties of the LCM ceramics. The LCM ceramic sintered at 505 °C attains an optimal relative density of 96.4 % and demonstrates outstanding microwave dielectric performance, featuring a ε<sub>r</sub> of 8.97, a Q × <em>f</em> value of 29,113 GHz, and a τ<sub><em>f</em></sub> of −62.68 ppm/°C. Additionally, the good chemical compatibility between LCM ceramics and Al electrodes makes it a promising candidate as microwave communication substrates.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 23","pages":"Pages 39744-39749"},"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/S0272884225028664","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
To achieve the goals of miniaturization, integration and green energy saving of microwave devices, microwave dielectric ceramics must have ultra-low sintering temperature and good dielectric properties. This study systematically investigates the microwave dielectric performances of a novel Li1.94Cu2.06(MoO4)3(LCM) ceramic synthesized using the solid-state reaction method. The results indicate a denser and more uniform microstructures contribute to improved dielectric properties of the LCM ceramics. The LCM ceramic sintered at 505 °C attains an optimal relative density of 96.4 % and demonstrates outstanding microwave dielectric performance, featuring a εr of 8.97, a Q × f value of 29,113 GHz, and a τf of −62.68 ppm/°C. Additionally, the good chemical compatibility between LCM ceramics and Al electrodes makes it a promising candidate as microwave communication substrates.
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.