Preparation method for high-power thin-film capacitor

Abstract

The invention discloses a preparation method for a high-power thin-film capacitor. A plastic film is placed in a vacuum high-temperature environment, wherein the temperature of the vacuum high-temperature environment is 1080 to 1120 DEG C and the air pressure of the vacuum high-temperature environment is 0.20 to 0.35 Pa; compound ceramic powder is fused and evaporated and covers a surface of a substrate film; a piece of zinc-aluminium composite metal is evaporated and covers a composite ceramic layer surface to obtain a metalized film electrode; and then the metalized film electrode is wound to obtain a high-power thin-film capacitor. In addition, the plastic film includes the following raw materials, by weight: 55 to 60 parts of polypropylene, 35 to 38 parts of epoxy resin, 22 to 25 parts of terpolycyantoamino-formaldehyde resin, 13 to 16 parts of chlorosulfonated polyethylene, 16 to 19 parts of phenyl ether silicone rubber, 11 to 14 parts of copper oxide, 5 to 8 parts of titanium diboride, 12 to 15 parts of barium sulfate, 6 to 9 parts of glass fibers, 3 to 6 parts of zirconia whisker, 2 to 5 parts of potassium titanate fibers, and 5 to 5.5 parts of silane coupling agents.

Description

technical field [0001] The invention relates to the technical field of film capacitors, in particular to a method for preparing high-power film capacitors. Background technique [0002] Film capacitors use metal foil as an electrode, which is stacked with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and wound into a cylindrical capacitor; in all Among the plastic film capacitors, the characteristics of polypropylene (PP) capacitors and polystyrene (PS) capacitors are the most significant. Of course, the price of these two capacitors is also relatively high. The quality of the capacitor film directly affects the service life and product performance of the capacitor. The demand for films is large and there are many types. It is difficult to meet the requirements of the market by using a single raw material to produce films, but each raw material has its shortcomings, so the produced films are difficult to meet the needs of var...

AI Technical Summary

Problems solved by technology

[0002] Film capacitors use metal foil as an electrode, which is stacked with plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate from both ends, and wound into a cylindrical capacitor; in all Among the plastic film capacitors, the characteristics of polypropylene (PP) capacitors and polystyrene (PS) capacitors are the most significant. Of course, the price of these two capacitors is also relatively high. The quality of the capacitor film directly affects the service life and product performance of the capacitor. The demand for films is large and there are many types. It is difficult to meet the requirements of the market by using a single raw material to produce films, but each raw material has its own shortcomings, so the produced films are difficult to meet the needs of various situations