Application of Permittivity Functionally Graded Material to Electrical Insulation of Power Apparatus

(1)研究了实现全固态变电所应满足的技术要求。(2)利用离心力可以从氧化铝/环氧混合物中制备出介电功能梯度材料。(3)对氧化铝颗粒的运动进行了数值模拟，并在此基础上研究了离心条件对离心过程的影响。(4)通过实验研究了氧化铝/环氧树脂复合材料的介电性能和放电特性，并说明了功能梯度材料在这些性能上的优势。(5)数值模拟了超声作用下氧化铝/环氧树脂复合材料制备薄壁功能梯度材料的可行性。

(1)Investigation of technical requirement to be met in order to achieve all solid substation is conducted.(2)A centrifugal force can be applied to fabricate the permittivity functionally graded materials from alumina/epoxy mixture. SEM images show that both the number density and size of alumina fillers are continuously graded.(3)Movement of an alumina particle is numerically and successfully simulated and, based on the numerical results, the way how the centrifugal conditions have influence on the centrifugal process.(4)Electrical properties of the fabricated alumina/epoxy resin such as the permittivity profiles and electrical discharge characteristics are experimentally examined, and the advantage of FGM on those properties are illustrated.(5)It is numerically demonstrated that a ultrasonic wave can be used to fabricate thin FGM from alumina/epoxy mixture.