Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic
Dielectric ceramics are essential components in communication systems that operate within the microwave frequency range. In high-density packages, dielectric substrates ceramics must possess high thermal conductivity to efficiently dissipate heat. However, achieving adequate thermal conductivity (κ)...
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Elsevier
2025-07-01
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| Series: | Journal of Materiomics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847824001795 |
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| author | Naichao Chen Jin Cheng Xinwei Xu Hongye Wang Xiaoyu Li Zhan Zeng Bingfeng Zhao Mingzhao Xu Hong Wang |
| author_facet | Naichao Chen Jin Cheng Xinwei Xu Hongye Wang Xiaoyu Li Zhan Zeng Bingfeng Zhao Mingzhao Xu Hong Wang |
| author_sort | Naichao Chen |
| collection | DOAJ |
| description | Dielectric ceramics are essential components in communication systems that operate within the microwave frequency range. In high-density packages, dielectric substrates ceramics must possess high thermal conductivity to efficiently dissipate heat. However, achieving adequate thermal conductivity (κ) in ceramics sintered at low temperatures is challenging. In this study, we employed the cold sintering process (CSP) to fabricate Li2MoO4-x%Al2O3 (0≤x ≤ 80, in volume) ceramics under 200 MPa pressure at 150 °C. The Li2MoO440%Al2O3 composite exhibited significantly enhanced κ of 5.4 W·m−1·K−1, an 80% increase compared to pure Li2MoO4 ceramic with κ of 3 W·m−1·K−1. At 40% Al2O3 content, the Li2MoO4Al2O3 ceramic demonstrated notable microwave properties (ε ∼ 6.67, Q×f ∼ 17,846 GHz, τf ∼ −105 × 10−6 °C-1). Additionally, simulation of a microstrip patch antenna for 5 GHz applications using Li2MoO420%Al2O3 ceramic as dielectric substrate via Finite Element Simulation software showed excellent performance, with radiation efficiency exceeding 99% and low return loss (S11 < −30 dB) at both 4.9 GHz and 28.0 GHz center frequencies. These findings underscore the suitability of Li2MoO4Al2O3 ceramics for microwave dielectric substrate. |
| format | Article |
| id | doaj-art-e84821a775e44ef18a1f78670b955adc |
| institution | DOAJ |
| issn | 2352-8478 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Journal of Materiomics |
| spelling | doaj-art-e84821a775e44ef18a1f78670b955adc2025-08-20T02:54:22ZengElsevierJournal of Materiomics2352-84782025-07-0111410094010.1016/j.jmat.2024.100940Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramicNaichao Chen0Jin Cheng1Xinwei Xu2Hongye Wang3Xiaoyu Li4Zhan Zeng5Bingfeng Zhao6Mingzhao Xu7Hong Wang8Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, ChinaDepartment of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China; Corresponding author. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.Dielectric ceramics are essential components in communication systems that operate within the microwave frequency range. In high-density packages, dielectric substrates ceramics must possess high thermal conductivity to efficiently dissipate heat. However, achieving adequate thermal conductivity (κ) in ceramics sintered at low temperatures is challenging. In this study, we employed the cold sintering process (CSP) to fabricate Li2MoO4-x%Al2O3 (0≤x ≤ 80, in volume) ceramics under 200 MPa pressure at 150 °C. The Li2MoO440%Al2O3 composite exhibited significantly enhanced κ of 5.4 W·m−1·K−1, an 80% increase compared to pure Li2MoO4 ceramic with κ of 3 W·m−1·K−1. At 40% Al2O3 content, the Li2MoO4Al2O3 ceramic demonstrated notable microwave properties (ε ∼ 6.67, Q×f ∼ 17,846 GHz, τf ∼ −105 × 10−6 °C-1). Additionally, simulation of a microstrip patch antenna for 5 GHz applications using Li2MoO420%Al2O3 ceramic as dielectric substrate via Finite Element Simulation software showed excellent performance, with radiation efficiency exceeding 99% and low return loss (S11 < −30 dB) at both 4.9 GHz and 28.0 GHz center frequencies. These findings underscore the suitability of Li2MoO4Al2O3 ceramics for microwave dielectric substrate.http://www.sciencedirect.com/science/article/pii/S2352847824001795Microwave dielectric ceramicThermal conductivityCold sintering processAntenna |
| spellingShingle | Naichao Chen Jin Cheng Xinwei Xu Hongye Wang Xiaoyu Li Zhan Zeng Bingfeng Zhao Mingzhao Xu Hong Wang Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic Journal of Materiomics Microwave dielectric ceramic Thermal conductivity Cold sintering process Antenna |
| title | Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic |
| title_full | Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic |
| title_fullStr | Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic |
| title_full_unstemmed | Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic |
| title_short | Structure, thermal and microwave dielectric properties of cold-sintered Li2MoO4Al2O3 ceramic |
| title_sort | structure thermal and microwave dielectric properties of cold sintered li2moo4al2o3 ceramic |
| topic | Microwave dielectric ceramic Thermal conductivity Cold sintering process Antenna |
| url | http://www.sciencedirect.com/science/article/pii/S2352847824001795 |
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