Key points of high voltage ceramic capacitor manufacturing process:
Non Polar High Voltage Capacitor

Non Polar High Voltage Capacitor

1) Raw materials should be selected
Factors affecting the quality of high-voltage ceramic capacitors, in addition to the composition of porcelain materials, optimize the process of manufacturing, strict process conditions is very important. Therefore, the raw materials should be considered both cost and purity, and when choosing industrial pure raw materials, attention must be paid to the applicability of raw materials. Amperometric capacitors
(2) The preparation of molten block
The quality of the preparation of the melt block on the porcelain ball mill fineness and firing has a great impact, such as the melt synthesis temperature is low, the synthesis is not sufficient. The subsequent process is not conducive. If the residual Ca2+ in the synthesized material, it will hinder the rolling film process: if the synthesis temperature is high, so that the frit is too hard, it will affect the ball milling efficiency: the introduction of impurities in the grinding medium will reduce the powder activity and lead to higher firing temperature of porcelain parts. Thin film capacitor
(3) Forming process
Forming to prevent uneven pressure in the thickness direction, too many closed pores in the blank, if there are large pores or layer cracks generated, will affect the electrical strength of the porcelain body.
(4) firing process
Should be strictly controlled firing system, take the excellent performance of temperature control equipment and good thermal conductivity of the kiln equipment.
(5) package sealing
The choice of sealing material, the control of sealing process and the cleaning treatment of the surface of the porcelain parts have great influence on the characteristics of the capacitor. Therefore, it is necessary to choose a good moisture resistance, and porcelain body surface closely combined with high electrical strength of the sealing material. At present, most of the choice of epoxy resin, a few products also have the choice of phenolic resin for sealing. There are also taken first insulating paint coating, and then the phenolic resin encapsulation method, which has some significance to reduce costs. Most of the large-scale production lines use powder encapsulation technology.
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