How to choose electrically insulating thermal sheet?

How to choose electrically insulating thermal sheet?Electrically insulating thermal sheet has the function of heat conduction and insulation. Different from thermally conductive silicone sheet, electrically insulating thermal sheet can withstand higher breakdown voltage under the condition of limited thickness, so it is widely used in MOS power that requires thermal insulation. Tube and other applications. Electrically insulating thermal sheet is also called thermally conductive silicone cloth. As a thermally conductive silicone cloth manufacturer, AOK will tell you how to choose the correct electrically insulating thermal sheet.

The main purpose of using a electrically insulating thermal sheet is to reduce the thermal resistance between the surface of the heat source and the contact surface of the heat sink, including the interface contact thermal resistance. The electrically insulating thermal sheet can well fill the air gap of the contact interface and squeeze the air out of the contact surface. Air is a poor conductor of heat and will seriously hinder the transfer of heat between the contact surfaces. With the supplement of the electrically insulating thermal sheet, the contact surfaces can be fully contacted and face-to-face contact can be achieved. The temperature response can achieve the smallest possible temperature difference.

Another factor considered in the use of electrically insulating thermal sheet is the dielectric strength. The higher the voltage applied at both ends of the insulator, the greater the electric field force the charge in the material receives, and the more likely it is to ionize and collide, causing the breakdown of the insulator, which is the breakdown of the insulator. The low voltage is called the breakdown voltage of this insulator. When an insulating material with a thickness of 1mm is broken down, the kilovolt of voltage that needs to be applied is called the dielectric strength of the insulating material, or dielectric strength for short. Since insulating materials have a certain degree of insulation strength, various electrical equipment, safety appliances, electrical materials and other manufacturers have specified a certain allowable voltage, called rated voltage. The voltage it bears during use must not exceed its rated voltage to avoid accidents.

Electrically insulating thermal sheets generally have higher insulation resistance and withstand voltage, and can avoid accidents such as leakage and breakdown, and avoid aging and deterioration due to long-term overheating. Therefore, the electrically insulating thermal sheet also has the characteristics of good thermal conductivity, moisture resistance and lightning protection, high mechanical strength, and convenient processing. Tensile strength: the tensile force that the insulating material can withstand per unit area. The insulation performance of the electrically insulating thermal sheet is closely related to the temperature. The higher the temperature, the worse the insulation performance of the thermally conductive insulating material. In order to ensure the insulation strength, each insulation strength has an appropriate higher allowable operating temperature. At this temperature, it can be used safely for a long time, and it will age quickly if it exceeds this temperature.

Shenzhen Aochuan Technology Co., Ltd.Company official website?http://www.aok-technologies.com/

Shenzhen Aochuan Technology Co., Ltd. Company official website：http://www.aok-technologies.com/