Let me introduce what is porcelain dielectric capacitor
Capacitor ceramic (barium titanate-titania) with high dielectric constant is extruded into a circular tube, disc or disc as a medium, and silver is plated on the ceramic as an electrode by infiltration method. It is divided into two kinds of high-frequency porcelain medium and low-frequency porcelain medium.
Capacitors with a small positive capacitance temperature coefficient are used in high-stability oscillation circuits as loop capacitors and matting capacitors. Low-frequency ceramic dielectric capacitors are limited to bypass or DC blocking in circuits with lower operating frequencies, or occasions where stability and loss are not required. Such capacitors should not be used in pulse circuits because they are easily hit by pulse voltage wear.
Ceramic capacitors are mainly aimed at high frequencies. High voltage ceramic capacitors depend on where you use them. Typical effects can eliminate high frequency interference.
1. Capacity loss has high stability with temperature and frequency
2. Special series structure is suitable for high voltage and long-term working reliability
3.High current climbing rate and suitable for non-inductive structure of large current loop.
① Since the dielectric material of the capacitor is ceramic, it has good heat resistance and is not easily aged.
② Porcelain dielectric capacitor can resist the corrosion of acid, alkali and salt, and has good corrosion resistance.
③ The dielectric constant of low-frequency ceramic materials is large, so the volume and capacity of low-frequency ceramic dielectric capacitors are small.
④Good insulation performance, can be made into high-voltage capacitors.
⑤ The relationship between the loss tangent of high-frequency ceramic materials and frequency is very small, so high-frequency ceramic dielectric capacitors can be used in high-frequency circuits.
⑥ The price is cheap and the raw materials are abundant, which is suitable for mass production.
⑦ Porcelain dielectric capacitor has small electric capacity and low mechanical strength.