Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites
Smart dielectrics with self-adaptive capabilities can exhibit desirable electric field-grading performance as the applied electric field exceeds a critical value. However, the conventional approaches to such dielectrics need heavy doping rate, which will not only increase the interface thermal resis...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/169043 |
| _version_ | 1811686384205824000 |
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| author | Xu, Huasong Gou, Bin He, Jie Lu, Yong Chen, Hui Li, Licheng Xie, Congzhen Hu, Xiao |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Xu, Huasong Gou, Bin He, Jie Lu, Yong Chen, Hui Li, Licheng Xie, Congzhen Hu, Xiao |
| author_sort | Xu, Huasong |
| collection | NTU |
| description | Smart dielectrics with self-adaptive capabilities can exhibit desirable electric field-grading performance as the applied electric field exceeds a critical value. However, the conventional approaches to such dielectrics need heavy doping rate, which will not only increase the interface thermal resistance and limit the improvement of thermal conductivity, but also severely sacrifice the mechanical property. In this contribution, a new type of electric field-grading co-continuous phase composite (EP/SiCcf) composed of epoxy resin and SiC ceramic foam was prepared to realize tunable nonlinear conductive performance, while simultaneously improving thermal and mechanical properties. Results show that there is no percolation threshold for all EP/SiCcf composites. The volume loadings of EP/SiCcf composites range from 8.7 vol% to 15.6 vol%, while the nonlinear coefficient subjected to potential barrier height increases from 2.1 to 4.5 and the switching field tuned by barrier width decreases from 1008 kV/mm to 686 kV/mm. The EP/SiCcf40 still exhibits sharp thermal conductivity enhancement of about 1000% and glass transition temperature enhancement of 10.8 °C. The surface temperature fluctuation over time during heating and cooling has illustrated the prospective application of thermal management capability. In addition, the dynamic mechanical analysis reveals that all EP/SiCcf composites have the significantly improved storage modulus and crosslinking density ascribed to the intact SiC skeleton. The novel co-continuous phase composite provides a new approach for global enhancement of smart dielectric composites in potential applications. |
| first_indexed | 2024-10-01T04:59:33Z |
| format | Journal Article |
| id | ntu-10356/169043 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:59:33Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1690432023-06-27T07:31:04Z Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites Xu, Huasong Gou, Bin He, Jie Lu, Yong Chen, Hui Li, Licheng Xie, Congzhen Hu, Xiao School of Materials Science and Engineering Engineering::Materials Smart Materials Polymer-Matrix Composites Smart dielectrics with self-adaptive capabilities can exhibit desirable electric field-grading performance as the applied electric field exceeds a critical value. However, the conventional approaches to such dielectrics need heavy doping rate, which will not only increase the interface thermal resistance and limit the improvement of thermal conductivity, but also severely sacrifice the mechanical property. In this contribution, a new type of electric field-grading co-continuous phase composite (EP/SiCcf) composed of epoxy resin and SiC ceramic foam was prepared to realize tunable nonlinear conductive performance, while simultaneously improving thermal and mechanical properties. Results show that there is no percolation threshold for all EP/SiCcf composites. The volume loadings of EP/SiCcf composites range from 8.7 vol% to 15.6 vol%, while the nonlinear coefficient subjected to potential barrier height increases from 2.1 to 4.5 and the switching field tuned by barrier width decreases from 1008 kV/mm to 686 kV/mm. The EP/SiCcf40 still exhibits sharp thermal conductivity enhancement of about 1000% and glass transition temperature enhancement of 10.8 °C. The surface temperature fluctuation over time during heating and cooling has illustrated the prospective application of thermal management capability. In addition, the dynamic mechanical analysis reveals that all EP/SiCcf composites have the significantly improved storage modulus and crosslinking density ascribed to the intact SiC skeleton. The novel co-continuous phase composite provides a new approach for global enhancement of smart dielectric composites in potential applications. This work was supported by the National Natural Science Foundation of China (No. 51977084). 2023-06-27T07:31:04Z 2023-06-27T07:31:04Z 2023 Journal Article Xu, H., Gou, B., He, J., Lu, Y., Chen, H., Li, L., Xie, C. & Hu, X. (2023). Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites. Composites Science and Technology, 236, 109984-. https://dx.doi.org/10.1016/j.compscitech.2023.109984 0266-3538 https://hdl.handle.net/10356/169043 10.1016/j.compscitech.2023.109984 2-s2.0-85149845692 236 109984 en Composites Science and Technology © 2023 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Materials Smart Materials Polymer-Matrix Composites Xu, Huasong Gou, Bin He, Jie Lu, Yong Chen, Hui Li, Licheng Xie, Congzhen Hu, Xiao Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites |
| title | Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites |
| title_full | Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites |
| title_fullStr | Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites |
| title_full_unstemmed | Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites |
| title_short | Tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin/SiC ceramic foam co-continuous phase composites |
| title_sort | tunable nonlinear conductive behavior without percolation threshold and high thermal conductivity of epoxy resin sic ceramic foam co continuous phase composites |
| topic | Engineering::Materials Smart Materials Polymer-Matrix Composites |
| url | https://hdl.handle.net/10356/169043 |
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