Capacitor is the commonly used electron component in electronic equipment, the structure that dismantles to a few kinds commonly used capacitor and characteristic are made with brief introducing, consult in order to offer everybody.

1 aluminium electroanalysises capacitor: It is by aluminium cylinder does negative pole, inside of liquid electrolyte, insert a person belt of a bent aluminium does positive electrode to be made. Still need to be handled via volts d.c. , make positive electrode piece on form an oxidation film to make medium. Its characteristic is a capacity big, but big, stability needs leakage of electricity, have losing polarity, comfortable in wave of power source filter or low frequency circuit, when using, , negative pole is not received instead.

2 Tantalum niobium electroanalysises capacitor: It uses metallic Tantalum or niobium makes positive electrode, with rare vitriolic etc match fluid to do negative pole, the oxidation film that makes with tantalum or niobium surface does medium to be made. Its characteristic is: Bulk stability of big, function, life grows small, capacity. Insulation resistance is great. Temperature performance is good, use in the requirement in higher equipment.

Capacitor of 3 pottery and porcelain: Make medium with pottery and porcelain. In silver-colored layer of spray of two sides of matrix of pottery and porcelain, next firing silver-colored qualitative film makes plate be made. Its characteristic is: Bulk small, hear resistance good, loss small, insulation resistance is tall, but the size is small, apply to high frequency circuit. Size of capacitance of iron report pottery and porcelain is larger, but loss and temperature coefficient are bigger, apply to low frequency circuit.

4 micaceous capacitor: Use tinsel or electric plate is made in silver-colored layer of the spray on mica sheet, after an one cascade adds up to plate and mica, again die-casting is in bakelite pink or seal solid to be made in epoxy resin. Its characteristic is: Dielectric loss small, insulation resistance is great. Temperature coefficient is small, apply to high frequency circuit.

5 film capacitor: The structure is identical at paper interpose capacitor, medium is polyester fibber or polystyrene. Capacitance of polyester fibber film, medium constant is taller, bulk small, capacity big, stability is better, make bypass capacitor aptly. Polystyrene film capacitor, dielectric loss small, insulation resistance is tall, but temperature coefficient is big, can use at high frequency circuit.

Capacitor of 6 paper interpose: Make electrode with two tinsel, place in paper-thin capacitance paper, roll into is cylindrical fuse of form of flat perhaps column, next sealed in metallic carapace perhaps make in insulating material carapace. Its characteristic is bulk lesser, the capacity can be done more greatly. But inherent inductance and loss ratio are older, apply to low frequency circuit.

Capacitor of interpose of 7 metalized paper: The structure is basic and identical at paper interpose capacitor, it is in the clothe on capacitor paper film of a metal takes the place of tinsel, bulk in small, look bigger, use at low frequency circuit commonly.
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