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Types of more habitual condensers Adjustable condenser Condenser in which a mechanical device (a screw, for example) allows to regulate its capacity when doing to move movable armors between fixed ones. Ceramic condenser Condenser constituted by a ceramic dielectric had in its two faces with metallic layers, normally silver, that they act like armors. Thanks to the high dielectric constant of the ceramic, great capacities with a very small volume are obtained. Condenser of paper Condenser whose dielectric is constituted by paper, generally impregnated of a mineral wax or an oil (mineral or synthetic). Condenser of metallized paper Condenser of paper whose armors are constituted by a metallic film deposited by evaporation to the emptiness in one of the faces of the paper. Electrolytic condenser Condenser, generally polarized, that contains two electrodes, one of them formed by an electrolyte, that under the action of an electrical current makes appear a layer of dielectric by oxidation of the anode. Two main bases exist oxidable; the aluminum and the tantalum giving origin to the aluminium oxide condensers and the tantalum oxide condensers. Plastic condenser Condenser that uses as dielectric a fine layer of plastic material. Several plastics with dielectric properties exist: Polystyrene Polypropylene Polytetrafluorethylene (Teflon) Tereftalato of polythene (Polyester) Polycarbonate Triacetato of cellulose Poliparaxileno Of all of them the most used is the polyester since it admits his bonding obtaining itself condensing of size very reduced and low price. Variable condenser Condenser with two games of movable armors one with respect to the other. Its use implies a continuous variation of the capacity. Condenser of mica Condenser that uses as material dielectric a mica layer. Of both existing types of mica, flogopita and moscovita, the most used by its electrical characteristics are moscovita mica. Its construction is based on piling up laminae of mica and tin for, finally, uniting all the tin laminae of a same side and welding, next, the exit terminals. They exist, also, condensers of mica silverplated in that the silver evaporates, that does the times of armor, on mica. |
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