Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite
Thermally conductive epoxy resin composites are widely used as electrical equipment insulation and package materials to enhance heat dissipation. It is important to explore the dielectric properties of the composites at high temperatures for the safe operation of the equipment. This paper investigat...
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| Format: | Article |
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MDPI AG
2022-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/10/1617 |
| _version_ | 1797497331986202624 |
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| author | Fuqiang Tian Jinmei Cao Shuting Zhang |
| author_facet | Fuqiang Tian Jinmei Cao Shuting Zhang |
| author_sort | Fuqiang Tian |
| collection | DOAJ |
| description | Thermally conductive epoxy resin composites are widely used as electrical equipment insulation and package materials to enhance heat dissipation. It is important to explore the dielectric properties of the composites at high temperatures for the safe operation of the equipment. This paper investigated the charge transport behavior of an epoxy/nano−SiO<sub>2</sub>/micro−BN composite at varied temperatures by combined analysis of the TSDC (thermally stimulated current), conduction current, complex permittivity and space charge distribution between 40 and 200 °C. The results show that ionic space charge accumulation was significantly suppressed in the composite at high temperatures. The conduction current increased gradually with temperature and manifested a remarkable shift from electron charge transport to ion charge transport near the glass transition temperature (<i>T</i><sub>g</sub>). The real and imaginary permittivity showed an enormous increase above <i>T</i><sub>g</sub> for both the epoxy resin and the composite. The conduction current and permittivity of the composite were remarkably reduced in comparison to the epoxy resin. Therefore, the ionic process dominated the high temperature dielectric properties of the epoxy resin and the composite. The nano–micro fillers in the composite can significantly inhibit ion transport and accumulation, which can significantly enhance the dielectric properties of epoxy resin. Thus, the nano–micro composite has a strong potential application as a package material and insulation material for electronic devices and electrical equipment operated at high temperatures. |
| first_indexed | 2024-03-10T03:17:21Z |
| format | Article |
| id | doaj.art-05696f7ffd3c4e358c845fe3914a89ea |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T03:17:21Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-05696f7ffd3c4e358c845fe3914a89ea2023-11-23T12:25:25ZengMDPI AGNanomaterials2079-49912022-05-011210161710.3390/nano12101617Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN CompositeFuqiang Tian0Jinmei Cao1Shuting Zhang2School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, ChinaThermally conductive epoxy resin composites are widely used as electrical equipment insulation and package materials to enhance heat dissipation. It is important to explore the dielectric properties of the composites at high temperatures for the safe operation of the equipment. This paper investigated the charge transport behavior of an epoxy/nano−SiO<sub>2</sub>/micro−BN composite at varied temperatures by combined analysis of the TSDC (thermally stimulated current), conduction current, complex permittivity and space charge distribution between 40 and 200 °C. The results show that ionic space charge accumulation was significantly suppressed in the composite at high temperatures. The conduction current increased gradually with temperature and manifested a remarkable shift from electron charge transport to ion charge transport near the glass transition temperature (<i>T</i><sub>g</sub>). The real and imaginary permittivity showed an enormous increase above <i>T</i><sub>g</sub> for both the epoxy resin and the composite. The conduction current and permittivity of the composite were remarkably reduced in comparison to the epoxy resin. Therefore, the ionic process dominated the high temperature dielectric properties of the epoxy resin and the composite. The nano–micro fillers in the composite can significantly inhibit ion transport and accumulation, which can significantly enhance the dielectric properties of epoxy resin. Thus, the nano–micro composite has a strong potential application as a package material and insulation material for electronic devices and electrical equipment operated at high temperatures.https://www.mdpi.com/2079-4991/12/10/1617epoxy resinnano–micro fillersspace chargeconduction currenthigh temperature |
| spellingShingle | Fuqiang Tian Jinmei Cao Shuting Zhang Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite Nanomaterials epoxy resin nano–micro fillers space charge conduction current high temperature |
| title | Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite |
| title_full | Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite |
| title_fullStr | Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite |
| title_full_unstemmed | Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite |
| title_short | Effect of Temperature on the Charge Transport Behavior of Epoxy/Nano−SiO<sub>2</sub>/Micro−BN Composite |
| title_sort | effect of temperature on the charge transport behavior of epoxy nano sio sub 2 sub micro bn composite |
| topic | epoxy resin nano–micro fillers space charge conduction current high temperature |
| url | https://www.mdpi.com/2079-4991/12/10/1617 |
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