Silicone rubber (SIR) has been widely used in electrical insulation fields, and the introduction of new materials is very important for the performance improvement of SIR composites. In this work, four different fillers, including aluminium hydroxide (ATH), yimonite (YMT), boron nitride (BN) and mica-filled SIR composites were prepared, and the vulcanization behavior, mechanical properties, insulation performance and hydrophobicity of the SIR composites were investigated and compared. Both BN- and mica-filled SIR composites showed excellent insulation performance, while the ATH-filled SIR composite exhibited the best mechanical properties with an elongation at break of 230% and a tensile strength of 2.9 MPa. The SIR/BN composite showed a breakdown strength of 29.2 kV/mm with a 5% failure rate. The addition of YMT deteriorated the insulation performance of SIR but improved the elongation at break and hydrophobicity, with an elongation at break increasing from 115% to 410% and the static contact angle improving from 109.8° to 115.6°.

中文翻译：

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各种填料对甲基乙烯基硅橡胶性能的影响

硅橡胶（SIR）在电绝缘领域有着广泛的应用，新材料的引入对于SIR复合材料的性能提升非常重要。在这项工作中，制备了四种不同的填料，包括氢氧化铝（ATH）、钛铁矿（YMT）、氮化硼（BN）和云母填充的SIR复合材料，并对SIR复合材料的硫化行为、机械性能、绝缘性能和疏水性进行了研究进行了调查和比较。BN 和云母填充的 SIR 复合材料均表现出优异的绝缘性能，而 ATH 填充的 SIR 复合材料表现出最佳的机械性能，断裂伸长率为 230%，拉伸强度为 2.9 MPa。SIR/BN 复合材料的击穿强度为 29.2 kV/mm，故障率为 5%。