Preparation method of composite polypropylene dielectric thin-film electrode for thin-film capacitor

A technology of composite polypropylene and film capacitors, used in fixed capacitor electrodes, capacitor manufacturing, fixed capacitor dielectrics, etc., can solve the problems of capacitor service life limit and overload resistance breakthrough bottleneck, achieve high density, improve continuity, The effect of increasing the dielectric constant of the medium

Active Publication Date: 2016-04-06
安徽源光电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dielectric constant of polypropylene film used in traditional MPP capacitors is 4.2, and its dielectric strength is 420VAC / μm. After evaporation and slitting, its dielectric strength is usually around 70VAC / μm in design. Breakthrough in life limit and anti-overload performance has become a bottleneck

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The invention proposes a method for preparing a composite polypropylene dielectric film electrode for film capacitors, comprising: putting the polypropylene film in a vacuum high-temperature environment, melting and vapor-depositing bonding ceramic powder on the surface of the polypropylene film, and then applying zinc The aluminum composite metal is vapor-deposited on the surface of the bonded ceramic layer to obtain a composite polypropylene dielectric film electrode for film capacitors; the temperature of the vacuum high-temperature environment is 800°C, and the pressure of the vacuum high-temperature environment is 0.2Pa.

[0015] The bonding ceramic powder comprises by weight: 1.2 parts of polyvinyl alcohol with a degree of polymerization of 950, and 23 parts of nanometer ceramic powder. The nano-ceramic powder includes by weight: 85 parts of micro-silicon powder, 8 parts of silicon oxide, 25 parts of aluminum silicon carbide, 12 parts of aluminum oxide, 8 parts of ...

Embodiment 2

[0018] The invention proposes a method for preparing a composite polypropylene dielectric film electrode for film capacitors, comprising: putting the polypropylene film in a vacuum high-temperature environment, melting and vapor-depositing bonding ceramic powder on the surface of the polypropylene film, and then applying zinc The aluminum composite metal is vapor-deposited on the surface of the bonded ceramic layer to obtain a composite polypropylene dielectric film electrode for film capacitors; the temperature of the vacuum high-temperature environment is 1000 ° C, and the pressure of the vacuum high-temperature environment is 0.1Pa.

[0019] The bonding ceramic powder comprises by weight: 0.8 parts of polyvinyl alcohol with a degree of polymerization of 1050, and 27 parts of nanometer ceramic powder. The nano-ceramic powder includes by weight: 80 parts of micro-silicon powder, 11 parts of silicon oxide, 20 parts of aluminum silicon carbide, 15 parts of aluminum oxide, 5 part...

Embodiment 3

[0022] The invention proposes a method for preparing a composite polypropylene dielectric film electrode for film capacitors, comprising: putting the polypropylene film in a vacuum high-temperature environment, melting and vapor-depositing bonding ceramic powder on the surface of the polypropylene film, and then applying zinc The aluminum composite metal is vapor-deposited on the surface of the bonded ceramic layer to obtain a composite polypropylene dielectric film electrode for film capacitors; the temperature of the vacuum high-temperature environment is 900°C, and the pressure of the vacuum high-temperature environment is 0.15Pa.

[0023] The bonding ceramic powder comprises by weight: 1 part of polyvinyl alcohol with a degree of polymerization of 1000, and 25 parts of nanometer ceramic powder. The nano-ceramic powder includes by weight: 83 parts of micro-silicon powder, 9 parts of silicon oxide, 23 parts of aluminum silicon carbide, 13.5 parts of aluminum oxide, 6.5 parts ...

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Abstract

The invention discloses a preparation method of a composite polypropylene dielectric thin-film electrode for a thin-film capacitor. The method comprises the following steps: putting a polypropylene thin-film into a vacuum high-temperature environment; melting and evaporating adhesive ceramic powder on the surface of the polypropylene thin-film; and evaporating zinc-aluminum composite metal on the surface of the adhesive ceramic powder to obtain the composite polypropylene dielectric thin-film electrode for the thin-film capacitor, wherein the temperature of the vacuum high-temperature environment is 800-1,000 DEG C; and the air pressure of the vacuum high-temperature environment is 0.099-0.2Pa. According to the composite polypropylene dielectric thin-film electrode for the thin-film capacitor prepared by the method, the dielectric strength of a dielectric medium is improved; the dielectric constant of a dielectric thin-film is improved; the antioxidant activity of the electrode is improved; high rated voltage of the thin-film capacitor is achieved; the thin-film capacitor can be miniaturized in size; and high-end and lightweight requirements of a product are met.

Description

technical field [0001] The invention relates to the technical field of film capacitors, in particular to a method for preparing composite polypropylene dielectric film electrodes for film capacitors. Background technique [0002] The electrical performance of film capacitors is good or bad, especially the dielectric plays a decisive role in the durability life. The dielectric constant of polypropylene film used in traditional MPP capacitors is 4.2, and its dielectric strength is 420VAC / μm. After evaporation and slitting, its dielectric strength is usually around 70VAC / μm in design. Breakthroughs in life limit and anti-overload performance have become bottlenecks. Contents of the invention [0003] Based on the technical problems existing in the background technology, the present invention proposes a method for preparing a composite polypropylene dielectric film electrode for film capacitors, which improves the dielectric strength of the dielectric, increases the dielectri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/008H01G4/12H01G13/00
CPCH01G4/008H01G4/12H01G13/00
Inventor 温海波温海清梅丽玲章新宇肖娟孙孝东
Owner 安徽源光电器有限公司
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