| Preparation and Properties of Boron Nitride/Silicone Rubber Ceramic Composites |
| Received:July 12, 2019 Revised:July 12, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.03.0163 |
| Key Words: boron nitride；silicone rubber；ceramizable composite；ceramization；bending strength； thermal stability |
| Author Name | Affiliation | E-mail | | REN Jingwen | Wuhan University of Technology | 1281887281@qq.com | | SONG Jiuqiang | Wuhan University of Technology | | | FU Huadong | Wuhan University of Technology | | | PENG Zhengwei | Wuhan University of Technology | | | QIN Yan* | Wuhan University of Technology | qinrock@sina.com |
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| Abstract: |
| The ceramizable silicone rubber composites were prepared by taking silicone rubber as the matrix，boron nitride as the ceramic filler，and chopped carbon fiber as the reinforcing material. The effects of boron nitride content on the properties of the ceramizable silicone rubber composites were investigated. The results showed that the physical properties of the composites increased as the additional level of boron nitride increased. When the additional level of boron nitride was 20 phr，the tensile strength and elongation at break of the composites reached the maximum. The bending strength of the high-temperature pyrolysis products of the composites gradually increased as the additional level of boron nitride increased. The intensity of XRD diffraction peaks of boron nitride in the composites gradually increased by increasing the additional level of boron nitride. When the additional level of boron nitride was 40 phr，a hard and dense ceramic layer was formed on the surface of the pyrolysis product，which could effectively prevent heat transfer. |
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