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首页> 外文期刊>Journal of Applied Polymer Science >Thermal, electrical, and mechanical properties of addition-type liquid silicone rubber co-filled with Al2O3 particles and BN sheets
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Thermal, electrical, and mechanical properties of addition-type liquid silicone rubber co-filled with Al2O3 particles and BN sheets

机译：附加型液体硅橡胶的热，电气和力学性能共用Al2O3颗粒和BN片材

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摘要

The addition-type liquid silicone rubber (ALSR) co-filled with spheroidal Al2O3 and flaky BN was prepared by the mechanical blending and hot press methods to enhance the thermal, electrical, and mechanical properties for industrial applications. Morphologies of ALSR composites were observed by scanning electron microscopy (SEM). It was found that the interaction and dispersion state of fillers in the ALSR matrix were improved by the introduction of BN sheets. Thermal, electrical, and mechanical performances of the ALSR composites were also investigated in this work. The result indicated that the thermal conductivity of ALSR can reach 0.64 W m(-1) K-1 at the loading of 20 wt% Al2O3/20 wt% BN, which is 3.76 times higher than that of pure ALSR. The addition of Al2O3 particles and BN sheets also improve the thermal stability of ALSR composites. Moreover, pure ALSR and ALSR composites showed relatively lower dielectric permittivity (1.9-3.1) and dielectric loss factor (<0.001) at the frequency of 10(3) Hz. The insulation properties including volume resistivity and breakdown strength were improved by the introduction of flaky BN in the ALSR matrix. The volume resistivity and characteristic breakdown strength E-0 are 6.68 x 10(15) omega m and 93 kV/mm, respectively, at the loading of 20 wt% Al2O3/20 wt% BN. In addition, the mechanical characteristics including elongation at break and tensile strength of ALSR composites were also enhanced by co-filled fillers. The combination of these improved performances makes the co-filled ALSR composites attractive in the field of electrical and electronic applications.
机译：通过机械混合和热压方法制备加入型液体硅橡胶（ALSR）与球形AL2O3和胶囊BN制备，以增强工业应用的热，电气和机械性能。通过扫描电子显微镜（SEM）观察ALSR复合材料的形态。发现通过引入BN片来改善ALSR基质中填料的相互作用和分散状态。在这项工作中还研究了ALSR复合材料的热，电和机械性能。结果表明，在20wt％Al 2 O 3 / 20wt％BN的负载下，AlSR的导热率可以达到0.64WM（-1）K-1，其比纯AlSR高3.76倍。添加Al 2 O 3颗粒和Bn片材还提高了AlSR复合材料的热稳定性。此外，纯AlSR和AlSR复合材料在10（3）Hz的频率下显示出相对较低的介电介电常数（1.9-3.1）和介电损耗因子（<0.001）。通过在ALSR基质中引入片状BN，改善了包括体积电阻率和击穿强度的绝缘性能。体积电阻率和特性击穿强度E-0分别为6.68×10（15）欧米茄M和93kV / mm，在20wt％Al 2 O 3 / 20wt％Bn的负载下。此外，还通过共填充填料增强了包括ALSR复合材料的断裂伸长和拉伸强度的机械特性。这些改进的性能的组合使得共同填充的ALSR复合材料在电气和电子应用领域中具有吸引力。

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