氧化铝/氮化铝共掺对液体硅橡胶热性能与力学性能的协同优化机制
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中图分类号：TQ333.93 文献标志码：A DOI：10.13338/j.issn.1674-649x.2025.01.010
The synergistic optimization mechanism of the thermal and mechanical properties of liquid silicone rubber based on alumina/aluminum nitride co-doping
SU Xiaolei，WEI Chenghang，LIUYi
（School of Materials Science and Engineering，Xi'an Polytechnic University，Xi'an 71Oo48，China）
Abstract In order to improve the thermal conductivity of silicone rubber and take into account its insulation and mechanical properties，alumina （ Al2O3 ）and aluminum nitride （AlN） powders were used as fillr materials， coupling agents were used as modifiers， and silicone rubber was used as the matrix.Liquid silicone rubber was prepared by mixing different proportions of fillers （20 （4：1，3：2，2：3，1：4） to construct an effective thermal conductivity network，thereby enhancing the thermal conductivity of the material. The results show that compared with the silicone rubber with only one filer，the thermal and mechanical properties of the silicone rubber obtained by mixing two different fillers are significantly improved. When the mixing ratio of alumina and aluminum nitride is 4：1 ，the thermal conductivity of silicone rubber composites reaches the highest，which is 1.347W/（m⋅K） . At the same time，the composite material at this ratio shows a Shore A hardness of 88.6，a tensile strength of 3.79MPa ，a elongation at break of 9. 53% ， and a volume resistivity of 3.962×1013Ω⋅m .Research indicates that by optimizing the mixing ratio of alumina and aluminum nitride， silicone rubber composites can significantly enhance thermal conductivity and mechanical properties while maintaining excellnt electrical insulation performance. This demonstrates their substantial potential for applications in electronic packaging and thermal management.
Keywordsalumina; aluminum nitride； additional liquid silicone;thermal conductivity property; mechanical property
0引言
随着电子元件向更高集成度发展，其单位面积的功率也在快速上升，功率密度的提升不可避免地导致设备发热量的增加[1-2]，因此，进行有效的热管理成为确保元件安全运行和长期耐用性的关键挑战[3]。（剩余14306字）
