采用纳米Al2O3对环氧多胶粉云母带进行纳米改性研究，探讨了纳米Al2O3含量对云母带常规性能、电寿命和导热系数的影响。结果表明：纳米Al2O3在粘合剂中的含量不超过13.5%时，云母带的常规性能可以满足现行国家标准和应用工艺的要求；随纳米Al2O3含量增大，纳米复合主绝缘材料的冲击强度有所下降，但155℃下的弯曲强度则呈增大趋势；纳米Al2O3含量约为5%时，主绝缘材料的电气强度最高，相比无纳米改性的复合材料提高了15%；纳米Al2O3含量约为13.5%时，主绝缘材料的电寿命最长，约为无纳米Al2O3复合材料的28倍，此时在105℃下的导热系数为0.34 W/(m·K)。
Epoxy resin-rich mica tape was modified by nano-Al2O3, and the effect of nano-Al2O3 content on its general performance, electric lifetime, and thermal conductivity was discussed. The results show that the general performance of mica tape can reach the technical requirements of national standard and application process when the nano-Al2O3 content in adhesive is not greater than 13.5%. With the increase of nano Al2O3 content in adhesive, the impact strength of the nanocomposite main insulation material re-duces, but the flexural strength at 155 ℃ increases. When the nano-Al2O3 content in adhesive is about 5%, the electric strength of the main insulation material reaches the maximum, which is 15% higher than that of the material without nano-Al2O3. When the nano-Al2O3 content in adhesive is about 13.5%, the electric lifetime of the main insulation material reaches the maximum, which is about 28 times as large as the material without nano-Al2O3, and the thermal conductivity at 155℃ is 0.34 W/(m·K).
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