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The structure and characteristics of mica capacitor

by:SMiLer     2021-03-06
The structure and characteristics of mica capacitor for mica plate, mica capacitor medium electrode foil type and metal film. Previous mica capacitor is made up of metal foil or spray on the surface of the mica sheet of silver electrode, again after the capacity of the laminated them as required by diffuse stains compression within the bakelite shell. At present mostly in mica medium of coating a layer of silver electrode, fold and core structure is installed, and then into the shell encapsulation, constitute capacitor. Shell has TaoJia shell, metal shell and plastic shell, commonly used for the plastic shell. Mica capacitor has the following characteristics: (1) the capacity range is not wide, is in commonly 10 - Between 51000 pf. (2) high stability, high reliability and high precision capacitor can also be made. (3) the inherent inductance is small, not easy ageing, stable frequency characteristic, is one of the excellent performance of high frequency capacitor (4) high insulation resistance, general is 1000 - 7500MΩ。 (5) good temperature characteristic, using the environment temperature is in commonly - Within 55 ℃ ~ + 85 ℃. Those small dielectric loss, the loss tangent value is commonly ( 5 - 30) x 10 - 4. All landowners prices more expensive, in recent years has been replaced with the ceramic capacitor and organic film capacitor. Mica capacitor applies to requiring higher stability and reliability and the high frequency high voltage electrical equipment.
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