Capacitor Aluminum Foil

Shanghai Nosinda Metal Co,Ltd is a leading aluminium foil for capacitor manufacturer and supplier.

Capacitor aluminium foil is widely used in electronic and power capacitor industry. Due to its unique properties of small proportion, large specific surface area and high conductivity, aluminum foil has become the best material for manufacturing film capacitors. Capacitor is a component that stores electricity and electrical energy (potential energy). Two conductors close to each other, sandwiching a layer of non-conductive insulating medium, constitute a capacitor. Charge is stored when a voltage is applied between the two plates of a capacitor. Capacitors play an important role in tuning, bypassing, coupling, filtering and other circuits. This application of aluminum foil employs not only its good electrical conductivity but also its oxide coating, specially formed (anodized) to make a superior dielectric layer between the two conductors. The dielectric constant of aluminum oxide is higher than that of waxed paper and many other dielectric materials, therefore it can store more electrons per unit of area. The oxide dielectric plate, which determines the size of a given capacitor, does not have to be as large as a paper dielectric "plate" for an equal capacity. Further, the oxide film, even a "thick" one, is thinner than the thinnest tissue paper. This thin film of aluminum oxide reduces the bulk of the capacitor; but more important, its thinness also increases the capacitance per unit of area. Another advantage of aluminum foil for electrolytic capacitors is that the foil is readily etched. This is important because etching greatly increases the true surface area which, when anodized, results in a far larger dielectric plate capacity.

If you want to know more about our Aluminum Foil, Carbon Coated Aluminum Foil, Battery Aluminum Foil, please feel free to contact us. We will reply to you within 24 hours.