Internal disadvantages of ceramic capacitors

The ceramic capacitor is formed by extruding a high dielectric constant capacitor ceramic barium titanate titanate into a circular tube, a disk or a disk as a medium, and plating the silver on the ceramic as an electrode by a fire infiltration method. Due to the low unit price, wide characteristic range, high volumetric efficiency and high frequency capacity of ceramic capacitors, it has a very wide range of applications, no matter which capacitors have the advantages and disadvantages.

1. The shortcomings of nodules inside the capacitor. The shortcoming of nodulation is formed by the deformation of the metalized electrode caused by the uneven coating of the metalized electrode material during the manufacturing process of the ceramic capacitor. Due to the deformation of the metalized electrode, the dielectric medium is deformed, so that the dielectric of the capacitor is thinned and the breakdown voltage is lowered. At the same time, the deformation of the metalized electrode can also cause the electric field to be uneven and breakdown failure when the capacitor is powered.

2. Disadvantages of dielectric voids inside ceramic capacitors. Dielectric voids are a common shortcoming in ceramic capacitors. They are caused by voids in the ceramic dielectric during the manufacturing process. Its main effect on the ceramic capacitor is to cause a partial breakdown voltage of the capacitor to decrease, resulting in breakdown failure or a decrease in insulation resistance between the two electrodes, and ionizing the air at the cavity at a higher voltage to generate a leakage path. The leakage is invalid.

The internal shortcomings of ceramic capacitors will gradually become better due to advances in technology, process improvements, material changes, etc. It is important to choose a reliable and reliable capacitor manufacturer.