How to determine the capacitance of ceramic capacitors

The main material of ceramic capacitors is porcelain. Porcelain flakes are made of ceramic powder and pressed at high temperature and sintered. The appearance does not change over time, so the storage period is long. However, since most ceramic dielectric capacitors are type 2 ceramic dielectrics, they have ferroelectric characteristics and exhibit a Curie temperature characteristic. Therefore, ceramic capacitors suffer from aging and attenuation.

Capacitance is determined by the impedance presented when measuring AC capacity. Usually AC capacity changes with changes in frequency, voltage, and measurement method, but the degree of change is different for ceramic capacitors of different specifications, unless the capacitance is required to be particularly accurate. The characteristics are particularly stable.

Although the capacitance of ceramic capacitors varies slightly under different conditions (such as frequency, temperature, and voltage), except for high-dielectric ceramic capacitors, the capacitance of capacitors is generally lower than the capacitance with changes in application conditions. Tolerance. Capacitance is an important electrical parameter of a capacitor. The size of the capacitance and the tolerance of the capacitance are stable over time.