Insulating materials, also known as dielectrics, refer to materials that are non-conductive or extremely
Insulating materials, also known as dielectrics, refer to materials that are non-conductive or extremely conductive under the action of DC voltage, and their resistivity is generally greater than 1010Ω·m. The main function of insulating materials is to isolate charged conductors of different potentials in electrical equipment so that current can flow along a certain path. They can also provide mechanical support and fixation, as well as arc extinguishing, heat dissipation, energy storage, moisture resistance, mildew resistance, or improve the potential distribution of the electric field and protect the conductor. Therefore, insulating materials are required to have the highest possible insulation resistance, heat resistance, moisture resistance, and certain mechanical strength.