Ultralow-loss (1-x)CaWO_(4)-xNa_(2)WO_(4) (x=0.1,0.2) microwave dielectric ceramic for LTCC applications  

作　　者：Tao Sun Bin Xiao Fei Jin` Xinwei Xu Feng Wang Naichao Chen Xianqiang Chen Hong Wang 

机构地区：[1]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China [2]Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices,Southern University of Science and Technology,Shenzhen,518055,China

出　　处：《Journal of Materiomics》2021年第5期1022-1028,共7页无机材料学学报（英文）

基　　金：This work was supported by Key Area Research Plan of Guangdong(Grant No.2020B010176001);the Shenzhen Science and Technology Program(Nos.KQTD20180411143514543 and JCYJ20180504165831308);Shenzhen DRC project[2018]1433.

摘　　要：In this work,the(1-x)CaWO_(4)-xNa_(2)WO_(4)(x=0.1,0.2,denoted as 0.9CW-0.1NW and 0.8CW-0.2NW,respectively)ultralow-loss microwave dielectric ceramics were prepared via solid-state reaction method.Using low melting-point Na_(2)WO_(4) as sintering aid to prepare CaW_(O4)eNa_(2)WO_(4) composite ceramics,the sintering temperature of CaWO_(4) was successfully reduced while maintaining excellent microwave performance.The optimal microwave dielectric properties have been achieved at 900C for 0.9CW-0.1NW ceramic:εr=9.0,Q×f=105660 GHz,tandδ=1.1×10^(-4)and tf=35.4 ppm/℃ at a frequency of 12.0 GHz.For the 0.8CW-0.2NW ceramic,the optimal microwave dielectric properties have been obtained at 740C,withεr=8.5,Q×f=97014 GHz,tandδ=1.2×10^(-4)and tf=37.4 ppm/℃ at a frequency of 11.8 GHz.In summary,both composite ceramics exhibit low sintering temperatures,excellent dielectric properties and chemical compatibility with the Ag electrode.The findings of this study provide an effective approach to prepare novel composite ceramics as promising candidates for LTCC applications.

关 键 词：Ultralow-loss LTCC Raman spectra Microwave dielectric ceramics 

分 类 号：TQ174.1[化学工程—陶瓷工业]