1.What is a ceramic capacitor
A high-dielectric constant capacitor ceramic (barium titanate-titanium oxide) is extruded into a circular tube, a wafer, or a disk as a medium, and silver is plated on the ceramic as an electrode by infiltration. It is divided into two types of high-frequency porcelain and low-frequency porcelain.
A ceramic capacitor is a capacitor made of a ceramic material as a dielectric, coated with a metal thin film on the surface of the ceramic, and then sintered at high temperature as an electrode. It is usually used in high-stability oscillation circuits as circuits, bypass capacitors, and pad capacitors.
2.Ceramic capacitor specifications
①High-voltage ceramic capacitors, generally withstand voltage above 1KV.
②Medium voltage ceramic capacitors generally refer to 100-1KV.
③Low-voltage ceramic capacitors generally refer to those below 100V.
As for the model: just like ordinary capacitors, there are basic capacitance values. 1p-104pf.
The capacitance of ceramic capacitors is generally in pF (10 to the 12th power F). Early products are usually labeled directly, such as 1000p, 220p, and so on. Now they are generally expressed in common index, such as 102, 221, the first two digits. The number is the effective number of the capacitance, and the last digit is the number of zeros after the addition. For example, 102 indicates that the effective number is 10, 2 indicates that the number is followed by 2 0, which is 1000pF; 221 indicates that the effective number is 22, and 1 indicates that Add a 0, which is 220pF.
3.How to classify ceramic capacitors
According to the dielectric material, it can be divided into: high dielectric constant capacitors and low dielectric constant capacitors;
According to the working frequency, it can be divided into: high-frequency ceramic capacitors and low-frequency ceramic capacitors;
According to the working voltage can be divided into: high-voltage ceramic capacitors and low-voltage ceramic capacitors.
According to the external structure, it can be divided into: disc shape, tube shape, through-heart type, tube shape and laminated type.