Influence of environmental conditions of ceramic capacitors on measurement results

Because of the stability of ceramic capacitors, good insulation, high voltage resistance, and relatively low price, they account for a large share of the electronic components market. Their appearance is mostly blue. With the continuous advancement of electronic technology, ceramic capacitors There are considerable developments in the development and can be widely applied.

The influence of the environmental conditions of the ceramic capacitor on the measurement result: According to the carrier difference, it can be divided into Class I ceramic dielectric capacitor and Class II ceramic dielectric capacitor. The consistent NP0, SL0, COG is the Class I ceramic dielectric capacitor, X7R, X5R, Y5U, Y5V is Ceramic capacitors of type II ceramics, under different working temperature conditions, the charge storage will have a relatively obvious change, at different operating temperatures, the nominal capacity of the capacitor and the actual capacitance limit different. For example, there is a difference between the test capacity at 50°C and the test capacity at 30°C. Therefore, it is not difficult for us to see that when the internal and external ambient temperatures are relatively high, the capacitive capacitance measurement results will be significantly lower. Therefore, Xiao Bian advocates placing the product under 25°C conditions for 10-30 minutes, allowing the raw materials to settle in a stable test environment and come back to the capacitance measurement.

The basic phenomenon of degradation of ceramic capacitor materials: Raw material degradation refers to the situation in which the capacitance value of the capacitor decreases due to time. This is the result of all materials that are made of insulators in porcelain materials. This is a natural but inevitable situation. The cause is due to the change of the internal crystal form with temperature and time to allow the capacitance value to decrease, which belongs to the principle of inversion.

When the degraded raw material is provided beyond the Curie point of the material, when the ambient temperature returns to room temperature, the molecular structure of the raw material is folded back to the original form. The material will begin to cycle through aging, and the capacitance of the ceramic capacitor will return to normal standards.