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What is function ceramics capacitors _ ceramics capacitors advantages

by:SMiLer     2021-02-13
Ceramics classification ceramics capacitors is divided into high frequency porcelain medium and low frequency dielectric. Has a small positive temperature coefficient of capacitance of the capacitor, used in high stable oscillator circuit, as circuit capacitors and padding capacitor. Low-frequency ceramic capacitor is limited to the working frequency low loop for bypass or separated dc, or stability and loss of <>, including high frequency is not high. This kind of capacitor is unfavorable use in pulse circuit, because they are easy to be pulse voltage breakdown. According to the ceramic dielectric capacitor dielectric points again: 1 kind of dielectric ( NP0 C0G) , 2 kinds of dielectric ( X7R 2 x1) And three kinds of dielectric ( Y5V 2 f4) Ceramic capacitor. EIA RS- 198. Ceramics is the role of ceramics capacitors with high dielectric constant of the ceramic capacitor < barium titanate a titanium oxide> squeezed into a circular tube, the wafer or disk as a medium, and burn infiltration method will be the silver plating on ceramic as electrode is made. It is divided into high frequency porcelain medium and low frequency dielectric. Has a small positive temperature coefficient of capacitance of the capacitor, used in high stable oscillator circuit, as circuit capacitors and padding capacitor. Low-frequency ceramic capacitor is limited to the working frequency low loop for bypass or separated dc, or stability and loss of <>, including high frequency is not high. This kind of capacitor is unfavorable use in pulse circuit, because they are easy to be pulse voltage breakdown. Used in the field of high power, high pressure high voltage ceramic capacitors, with small, high pressure and frequency characteristic is good wait for a characteristic. High voltage ceramic capacitor has become one of the high power high voltage electronic products indispensable element. The purpose of the high voltage ceramic capacitor consists of transmission and distribution system of electric power equipment and processing equipment of pulse energy. 1. MLCC( 1) — Miniaturization, high frequency, low loss, low ESR, high stability, high pressure, high insulation, high reliability, no polarity, low value, low cost, high temperature resistance, mainly used in high frequency circuits. 2. MLCC( 2 class) — In the miniaturization, high volume, high pressure, no polarity, high reliability, high temperature resistant, low ESR, low cost, mainly used in the low frequency circuits for blocking, coupling, bypass and filter capacitor is used. Advantages of porcelain tile capacitance capacitance loss with temperature frequency Ken high stability; Suitable for high voltage extremely long-term working reliability, high current climbing rate and is suitable for high current circuits non-inductive structure. The disadvantage is the relatively small capacity.
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