Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics
In this paper, novel Ca3CoTiGe3O12 (CCTG) and Ca3NiTiGe3O12 (CNTG) ceramics with transition metal elements and Ti co-occupying the B-site were designed by calculating the tolerance factor of the garnet structure. CCTG and CNTG ceramics sintered at optimal temperatures exhibit excellent microwave die...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| author | Yuan Nie Yanjun Liu Ziqi Zhao Wenjie Zhang Fangyi Huang Huanfu Zhou |
| author_facet | Yuan Nie Yanjun Liu Ziqi Zhao Wenjie Zhang Fangyi Huang Huanfu Zhou |
| author_sort | Yuan Nie |
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| description | In this paper, novel Ca3CoTiGe3O12 (CCTG) and Ca3NiTiGe3O12 (CNTG) ceramics with transition metal elements and Ti co-occupying the B-site were designed by calculating the tolerance factor of the garnet structure. CCTG and CNTG ceramics sintered at optimal temperatures exhibit excellent microwave dielectric properties with εr = 11.64, Q×f = 45474.73 GHz, τf = −42.01 ppm/°C and εr = 11.58, Q×f = 41346.11 GHz, τf = −45.53 ppm/°C, respectively. X-ray diffraction analysis shows that the CCTG is single phase while secondary phase is present in CNTG. The analysis of density and surface micromorphology for the ceramics synthesized in this study reveals that both possess high densities. Raman analysis shows that the half-width (FWHM) corresponding to the peak of the A1g mode is closely related to the dielectric loss of both ceramics. The lattice energy and packing fraction are both critical factors that influence the Q×f value of CCTG ceramics. The influence of the secondary phase on the Q×f value of CNTG ceramics cannot be ignored. Both the bond valence and bond energy of the B-site cation are factors that affect τf. In conclusion, the two ceramics studied in this paper have great application prospects in the field of microwave communications. |
| format | Article |
| id | doaj-art-706f00229dbf424c87cda98b737c61bd |
| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-706f00229dbf424c87cda98b737c61bd2025-01-19T06:25:38ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013412131222Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramicsYuan Nie0Yanjun Liu1Ziqi Zhao2Wenjie Zhang3Fangyi Huang4Huanfu Zhou5Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, 541004, Guilin, ChinaKey Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, 541004, Guilin, ChinaKey Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, 541004, Guilin, ChinaKey Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, 541004, Guilin, ChinaCorresponding author.; Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, 541004, Guilin, ChinaCorresponding author.; Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, Guilin University of Technology, 541004, Guilin, ChinaIn this paper, novel Ca3CoTiGe3O12 (CCTG) and Ca3NiTiGe3O12 (CNTG) ceramics with transition metal elements and Ti co-occupying the B-site were designed by calculating the tolerance factor of the garnet structure. CCTG and CNTG ceramics sintered at optimal temperatures exhibit excellent microwave dielectric properties with εr = 11.64, Q×f = 45474.73 GHz, τf = −42.01 ppm/°C and εr = 11.58, Q×f = 41346.11 GHz, τf = −45.53 ppm/°C, respectively. X-ray diffraction analysis shows that the CCTG is single phase while secondary phase is present in CNTG. The analysis of density and surface micromorphology for the ceramics synthesized in this study reveals that both possess high densities. Raman analysis shows that the half-width (FWHM) corresponding to the peak of the A1g mode is closely related to the dielectric loss of both ceramics. The lattice energy and packing fraction are both critical factors that influence the Q×f value of CCTG ceramics. The influence of the secondary phase on the Q×f value of CNTG ceramics cannot be ignored. Both the bond valence and bond energy of the B-site cation are factors that affect τf. In conclusion, the two ceramics studied in this paper have great application prospects in the field of microwave communications.http://www.sciencedirect.com/science/article/pii/S223878542402951XTolerance factorGarnet structuredHigh-quality factorLow permittivityBond characteristics |
| spellingShingle | Yuan Nie Yanjun Liu Ziqi Zhao Wenjie Zhang Fangyi Huang Huanfu Zhou Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics Journal of Materials Research and Technology Tolerance factor Garnet structured High-quality factor Low permittivity Bond characteristics |
| title | Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics |
| title_full | Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics |
| title_fullStr | Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics |
| title_full_unstemmed | Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics |
| title_short | Synthetic design and analysis on microwave dielectric properties of novel garnet-type Ca3MTiGe3O12 (M = Co, Ni) ceramics |
| title_sort | synthetic design and analysis on microwave dielectric properties of novel garnet type ca3mtige3o12 m co ni ceramics |
| topic | Tolerance factor Garnet structured High-quality factor Low permittivity Bond characteristics |
| url | http://www.sciencedirect.com/science/article/pii/S223878542402951X |
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