Jul. 22, 2022
The dielectrics of ceramic capacitors are made of high dielectric constant ceramic materials. The ceramic capacitor electrode is formed by sintering the silver on the ceramic at high temperature, and the surface is encapsulated with epoxy resin. Such ceramic capacitors have the advantages of excellent insulation, heat resistance, and low loss, and are used in military equipment, industrial equipment, consumer electronics and other industries.
Ceramic capacitors can last a long time in the right environment but are easy to fail and be damaged if they work in a relatively humid environment.
Why are ceramic capacitors easy to fail and be damaged in a humid environment? Due to the higher conductivity of moisture than dielectric substances, when the air humidity increases, water droplets adhere to the ceramic capacitor shell and condense, resulting in a gradual decrease in the surface insulation resistance of the ceramic capacitor. Working in a humid environment for a long time, water gradually penetrates into the dielectric of the ceramic capacitor, which reduces the insulation resistance and insulation ability of the ceramic capacitor dielectric.
When ceramic capacitors work at high temperatures, the infiltrated water molecules will be electrolyzed into hydrogen ions (H+) and hydroxide ions (OH-) under the action of an electric field, and electrochemical corrosion occurs at the root of the lead. Even if it is dried and dehumidified, it is impossible to restore the performance. During electrolysis, the silver ions on the silver electrode not only migrate to the dielectric surface of the ceramic capacitor, but also diffuse into the interior of the dielectric, resulting in an increase in leakage current. Damaged ceramic capacitors will also cause damage to electronic products, resulting in short-circuit failure of electronic products.
Therefore, when using ceramic capacitors, we must pay attention to use in an environment with suitable temperature and moderate air humidity and ventilation, and ceramic capacitors can be used for a longer time in a suitable environment.
Select a reliable manufacturer when purchasing ceramic capacitors can avoid a lot of unnecessary trouble. JYH HSU (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories has passed ISO9001:2015 quality management system certification; JEC safety capacitors (X capacitors and Y capacitors) and varistors have passed the certification of various countries; JEC ceramic capacitors, film capacitors and super capacitors are in line with low carbon indicators.
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