Machine-learning-guided discovery of Ca_(3)SnSi_(2)O_(9)-based ceramics with ultrahigh Q×f values for topological metasurface filtersOA
Microwave dielectric ceramics have emerged as highly promising materials for high-frequency applications due to their exceptional dielectric properties.Nevertheless,achieving an optimal balance among the interdependent parameters of relative permittivity(εr),quality factor(Q×f),and temperature coefficient of resonant frequency(τf)to satisfy the technical requirements of microwave components continues to pose a substantial challenge.In this work,an interpretable machine learning framework was proposed to elucidate the structure-property relationships,thereby guiding the compositional design of the candidate microwave ceramic Ca_(3)SnSi_(2)O_(9).Based on the machine learning insights,we developed a Ca3Sn1−xGexSi_(2)O_(9)(0.025≤x≤0.20)ceramic system where controlled Ge4+substitution for Sn4+was strategically designed to synergistically optimize both Q×f andτf values while maintaining lowεr.This improvement was achieved through the enhanced relative covalency(rc)of Sn-O and Si-O bonds,along with intensified octahedral distortion(δ)and polyhedral chain angles(σ)in the single-phase Ca3Sn1−xGexSi_(2)O_(9) ceramics.Remarkably,the Ca3Sn1−xGexSi_(2)O_(9)(x=0.05)ceramics demonstrated outstanding performance,exhibiting an ultrahigh Q×f value of 120,413 GHz coupled with a favorably small negativeτf value of−25.8 ppm/℃.These results clearly demonstrate that the collaborative optimization strategy can significantly enhance the microwave dielectric properties of Ca_(3)SnSi_(2)O_(9)-based ceramics.Furthermore,a single-mode topological metasurface filter operating in the X-band was designed and fabricated using the ultralow dielectric loss Ca3Sn1−xGexSi_(2)O_(9)(x=0.05)ceramics.Leveraging the bulk-edge correspondence,we established a relationship between structural morphology with transitional deformations and operating frequency.Experimental results demonstrated that the topological metasurface filter can operate at any frequency within the range of 9.6-10.3 GHz.This advancement extends the potential applications of Ca_(3)SnSi_(2)O_(9)-based ceramics to metasurface filters for highfrequency communication systems.
Kang Du;Yunkang Ge;Beibei Wang;Yuan Wang;Chengyun Li;Anping Lv;Yan Liu;Ying Yang;Weijia Han;Guochao Wei;Wen Lei;Shengxiang Wang
School of Microelectronics,Wuhan Textile University,Wuhan 430200,China Hubei Provincial Engineering Research Center for Wide-Bandgap Semiconductor Materials and Devices,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,China Hubei Provincial Engineering Research Center for Wide-Bandgap Semiconductor Materials and Devices,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,China Hubei Provincial Engineering Research Center for Wide-Bandgap Semiconductor Materials and Devices,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,China Hubei Provincial Engineering Research Center for Wide-Bandgap Semiconductor Materials and Devices,Wuhan Textile University,Wuhan 430200,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,China Hubei Provincial Engineering Research Center for Wide-Bandgap Semiconductor Materials and Devices,Wuhan Textile University,Wuhan 430200,ChinaSchool of Optical and Electronic Information,Key Lab of Functional Materials for Electronic Information(B)of MOE,Huazhong University of Science and Technology,Wuhan 430074,China Advanced Manufacturing Institute of Huazhong University of Science and Technology in Wenzhou,Zhejiang Key Laboratory of Electronic Functional Ceramics and Devices,Wenzhou 325035,ChinaSchool of Microelectronics,Wuhan Textile University,Wuhan 430200,China Hubei Provincial Engineering Research Center for Wide-Bandgap Semiconductor Materials and Devices,Wuhan Textile University,Wuhan 430200,China
化学化工
Ca_(3)SnSi_(2)O_(9)-based ceramicscrystal structural optimizationultrahigh quality factor(Q×f)valuesmachine learningtopological metasurface filters
《Journal of Advanced Ceramics》 2026 (5)
P.117-130,14
financial support from the National Natural Science Foundation of China(Nos.52402153 and 12504510)the Natural Science Foundation of Wuhan(No.2025040601020165)the Foundation of the Open Research Fund of Anhui Key Laboratory of Low Temperature Cofired Materials(No.HNLC2025A01).
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