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Method for Improving DC Breakdown Field Strength of Capacitor Dielectric Film Based on Benzoin

A capacitor dielectric and DC breakdown technology, applied in the direction of fixed capacitor dielectric, fixed capacitor components, etc., can solve the problem of destroying the insulation properties of polypropylene, and achieve the effect of increasing the operating voltage and improving the breakdown field strength

Inactive Publication Date: 2021-01-05
TIANJIN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, how to ensure the uniform dispersion of nanoparticles in materials has always been a difficult problem that cannot be effectively solved
Agglomeration of nanoparticles in the material can severely damage polypropylene's insulating properties

Method used

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  • Method for Improving DC Breakdown Field Strength of Capacitor Dielectric Film Based on Benzoin
  • Method for Improving DC Breakdown Field Strength of Capacitor Dielectric Film Based on Benzoin
  • Method for Improving DC Breakdown Field Strength of Capacitor Dielectric Film Based on Benzoin

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] The method for improving the DC breakdown field strength of the capacitor dielectric film based on benzoin comprises the following steps:

[0019] 1. Mix dry polypropylene granules with benzoin (chemical formula see figure 1 ) according to the mass ratio of 99.5:0.5 was fully mixed in the internal mixer for 10 minutes, the temperature was 180°C, and the rotational speed of the internal mixer was 30r / min to obtain a polypropylene composite material.

[0020] 2. Set up a control group, melt and mix dry polypropylene granules in an internal mixer for 10 minutes at a temperature of 180° C., and a rotational speed of the internal mixer at 30 r / min to obtain a polypropylene material.

[0021] 3. Weigh 5 grams of polypropylene composite material and place it in a flat vulcanizing machine, preheat it at 180°C for 10 minutes to fully melt the polypropylene composite mat...

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Abstract

The invention discloses a method for improving the DC breakdown field strength of a capacitor dielectric film based on benzoin. The method comprises the following steps of: 1, fully mixing a dried polypropylene particles and benzoin were in an internal mixer at a mass ratio of 99.5:0.5 to obtain a polypropylene composite material, and, setting a control group, namely a polypropylene material without addition of benzoin ; 2, employing a flat vulcanizing machine to press the polypropylene composite material to a test sample with a side of 90*90mm and a thickness of 80 [Mu]m; 3, performing vacuum drying of the test sample for 24 hours to allow the test sample to fully exclude impurities; 4, employing a plate electrode to perform DC breakdown test for the test sample; and 5, employing the polypropylene material of the control group to repeat the steps 2-4. The experiment shows that the method can effectively improve the breakdown field strength of polypropylene film.

Description

technical field [0001] The invention relates to a method for increasing the breakdown field strength of a capacitor dielectric film, more specifically, a method for increasing the DC breakdown field strength of a capacitor dielectric film based on benzoin. Background technique [0002] DC capacitors play an irreplaceable role in today's power systems, and are developing towards light weight and miniaturization. The progress of dielectric materials is the key to its development. Most of the solid dielectric materials of power capacitors are polypropylene films. Due to the presence of "electrical weaknesses" such as impurities introduced in the production process of polypropylene films, the breakdown field strength of polypropylene films decreases. Dielectric breakdown under DC voltage is an important factor causing DC capacitor failure. Therefore, it is of great significance to study the method of reducing the impact of "electrical weakness" on the breakdown field strength o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G4/14
CPCH01G4/14
Inventor 杜伯学许然然李进侯兆豪韩晨磊王明洋
Owner TIANJIN UNIV
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