黑滑石基微波介质陶瓷材料的结构与性能研究  

Structure and performances of black talc based microwave dielectric ceramics

作　　者：刘子峥 朱帅 李俞辉 余磊 王哲飞 LIU Zizheng;ZHU Shuai;LI Yuhui;YU Lei;WANG Zhefei(School of Materials Engineering,Changshu Institute of Technology,Changshu 215500,Jiangsu Province,China)

机构地区：[1]常熟理工学院材料工程学院,江苏常熟215500

出　　处：《电子元件与材料》2024年第12期1437-1442,共6页Electronic Components And Materials

基　　金：国家自然科学基金(52301260)。

摘　　要：随着5G移动通信技术的不断发展,现有通信频段逐渐向毫米波频段转移。高性能低介电常数微波介质陶瓷材料能够满足5G移动通信器件的应用需求,黑滑石矿因含有低介电常数组分而受到关注。该实验通过固相烧结法制备了黑滑石基微波介质陶瓷材料,重点研究了烧结温度对其烧结行为、物相组成、显微形貌和微波介电性能的影响。研究表明:黑滑石陶瓷以MgSiO_(3)顽火辉石相和SiO_(2)方石英相共存。烧结致密性和样品组分对陶瓷材料的微波介电性能有重要影响。当烧结温度为1325℃时,样品具有最佳的微波介质性能:ε_(r)=5.11,Q×f=56782 GHz,τ_(f)=-17.85×10^(-6)/℃。这一研究不但为黑滑石的高值化利用提供新的思路,同时也为5G商用微波器件用陶瓷材料提供新的解决方案。With the continuous development of 5G mobile communication,the frequency band for communication is gradually transferred to the millimeter wave band.Microwave dielectric ceramics materials with high-performance and lowpermittivity can meet the application requirements for 5G mobile communication devices.Black talc ore have attracted much attention due to their low-permittivity components.Here the black talc based microwave dielectric ceramics were prepared experimentally by solid-state sintering method.The effects of sintering temperature were systematically investigated on the sintering behavior,phase composition,morphology and microwave dielectric properties.The results show that the MgSiO_(3)protoenstatite and SiO_(2)cristobalite phases coexist in the black talc ceramics.The results also show that sample density and composition have important effects on the microwave dielectric properties of the ceramic materials.At the sintering temperature of 1325℃,the sample has the optimized microwave dielectric properties,namely,ε_(r)=5.11,Q×f=56782 GHz,τ_(f)=-17.85×10^(-6)/℃.This research provides not only a new approach for the high-value utilization of black talc,but also a new solution to ceramic dielectrics for 5G commercial microwave devices.

关 键 词：黑滑石矿 微波介质陶瓷 MgSiO_(3) SiO_(2) 

分 类 号：TQ174.75[化学工程—陶瓷工业]