High-voltage ceramic capacitor manufacturing process points

The high-voltage ceramic capacitor is an epoxy resin potted capacitor with dielectric ceramic as the core material. With the advancement of the times and the development of science and technology, high-voltage ceramic capacitors mainly refer to capacitors with an AC operating voltage of 1KV or higher, or ceramic capacitors with a DC operating voltage of 40KV or higher. What are the main points of the manufacturing process of high voltage ceramic capacitors?

Preparation of frit:

The preparation quality of the frit has a great influence on the fineness and firing of the ceramic material. If the sintering temperature of the frit is low, the synthesis is insufficient, which is unfavorable for the subsequent process.

Raw materials should be selected:

Factors affecting the quality of high-voltage ceramic capacitors, in addition to the composition of porcelain, optimization of process manufacturing, strict process conditions are very important. Therefore, the raw materials should be considered both in terms of cost and purity. When selecting industrial pure raw materials, attention must be paid to the suitability of the raw materials.

Firing process:

The firing system should be strictly controlled, and temperature control equipment with excellent performance and kiln furniture with good thermal conductivity should be adopted.

Molding:

When forming, it is necessary to prevent uneven pressure in the thickness direction, and the blank has too many closed pores. If there are large pores or cracks, it will affect the electric strength of the porcelain.

Encapsulation:

The selection of the encapsulating material, the control of the encapsulation process, and the cleaning treatment of the surface of the porcelain piece have a great influence on the characteristics of the capacitor. Therefore, it is necessary to select a sealing material which has good moisture resistance and is closely combined with the surface of the ceramic body and has high electric strength.