What material is capacitor aluminum foil

What is capacitor aluminum foil?

Capacitor aluminum foil is made of high-purity aluminum, which is widely used in capacitors, high voltage transformers and other industries.

What materials are used for aluminum electrolytic capacitors?

The basic material of the anode for aluminum electrolytic capacitors is a foil with a thickness of ~ 20–100 μm made of aluminum with a high purity of at least 99.99%. This is etched (roughened) in an electrochemical process to increase the effective electrode surface.

What is the structure of aluminum electrolytic capacitor?

2. Structure of Aluminum Electrolytic Capacitor The aluminum electrolytic capacitor has, as shown in Fig.3 , a roll of anode foil, paper separator, cathode foil and electrode terminals (internal and external terminals) with the electrolyte impregnated, which is sealed in an aluminum can case with a sealing material.

Can aluminum foil be used to etch a capacitor?

In comparison to other dielectric, similar voltage endurance is provided by dielectrics even if thickness ("d" in the above formula) is thin. By etching the surface of aluminum foil, the effective area of the foil can be enlarged 80~100 times for low voltage capacitors and 30~40 times for middle / high voltage capacitors.

What factors affect the performance of aluminum electrolytic capacitors?

Among them, the anode aluminum foil (ie, corroded into foil) and electrolyte (ie the actual cathode of aluminum electrolytic capacitor) play a major role in the performance of aluminum capacitors. 30%-70% of the cost of aluminum electrolytic capacitors comes from the corrosion formed foil.

Does cathode foil have a capacitance?

The cathode foil has a capacitance (Cc) that uses the oxide layer, which formed by the forming voltage or formed naturally during storage (generally 1V or less), as a dielectric. According to the construction of aluminum electrolytic capacitors, Ca and Cc are connected in series.