With the continuous development of microelectronics technology, electronic devices develop to high power and high integration degree, and insulation energy is one of the key factors restricting their service life.In recent years, for power-intensive electronic devices such as LED, CPU, the researchers have developed high thermal conductive insulating ceramic powder (such as silicon nitride, aluminum nitride and alumina) mixed with silicon oil to prepare high thermal conductive silicon lipids.In addition, the transmission line is erected outdoors. Affected by the natural environment, the contact area of the transmission line is prone to oxidation / corrosion, and the charged area will produce electric sparks, prone to bad contact between electrodes, heat resistance will lead to local excessive temperature rise, and even fire in serious cases.At the same time, under the action of the wind, the wire is easy to swing, and the charged contact area produces micro-dynamic wear, which is more likely to cause serious arc erosion phenomenon.Based on this, the preparation of high thermal insulation grease is the premise to ensure the normal operation of high voltage transmission line.