Common manufacturing materials of capacitor

Material 1: solid dielectric

Generally, the solid medium of power capacitor is capacitor paper. With the continuous development of capacitor industry, plastic film has been introduced into the production of capacitor. In recent years, power capacitor with film medium has gradually become the mainstream product in the capacitor market. Each of them has its own advantages. Capacitor paper has been used by capacitors because of its large size and good impregnation performance. The technology of plastic film is becoming more and more mature, and its advantages are also showing.

As paper and film have their own characteristics, it is a common way to make power capacitor materials with paper and film composite dielectric.

Material 2: liquid dielectric

Liquid dielectric is used as impregnant in power capacitor materials to fill the voids in solid dielectric, so as to improve dielectric constant and dielectric strength, improve partial discharge characteristics and heat dissipation conditions, etc. In recent years, Dodecylbenzene and Diarylethane (s oil) are widely used as capacitor materials. The castor oil pump has been used in the pulse capacitor because of its large E. Trichlorinated biphenyl has stable electrical properties, but it is eliminated because of its toxicity.

Material 3: electrode materials

Most of the electrode materials are aluminum foil. In parallel low voltage capacitors, metallization is also used as the electrode. There is nothing to talk about, because of the cost performance relationship, now aluminum foil has been widely used in power capacitor production materials