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Polarization method of polyvinylidene fluoride thin film

A technology of polyvinylidene fluoride and thin film, which is applied in the manufacture/assembly of piezoelectric/electrostrictive devices, etc., which can solve the problems of film breakdown and increase the manufacturing cost of polyvinylidene fluoride film, and achieve the probability of breakdown Low, avoid edge flashover, reduce manufacturing cost

Inactive Publication Date: 2015-03-18
龚伶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, in the process of polarizing the polyvinylidene fluoride film, the film is prone to breakdown, which increases the manufacturing cost of the polyvinylidene fluoride film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The polarization method of the polyvinylidene fluoride film comprises the following steps: step 1, the upper and lower planes of the polyvinylidene fluoride film are vapor-deposited with silver with a thickness of 90nm as the metal electrode; step 2, pouring silicone oil into the heater, and Put the polyvinylidene fluoride film coated with metal electrodes into the silicone oil of the heater; step 3, adjust the temperature of the silicone oil in the heater to 80°C, and apply a voltage to the polyvinylidene fluoride coated with metal electrodes, wherein, apply The voltage on the polyvinylidene fluoride film coated with metal electrodes is 130MV / m, and the duration is 60min; step 4, take out the polyvinylidene fluoride film in the heater and cool it at room temperature to obtain the polarized polyvinylidene fluoride film. The polyvinylidene fluoride film obtained by polarizing in this embodiment has good piezoelectricity, ferroelectricity and pyroelectricity, and the brea...

Embodiment 2

[0020] The polarization method of the polyvinylidene fluoride film comprises the following steps: step 1, the upper and lower planes of the polyvinylidene fluoride film are vapor-deposited with silver with a thickness of 95nm as the metal electrode; step 2, pouring silicone oil into the heater, and Put the polyvinylidene fluoride film coated with metal electrodes into the silicone oil of the heater; step 3, adjust the temperature of the silicone oil in the heater to 85°C, and apply a voltage to the polyvinylidene fluoride coated with metal electrodes, wherein, apply The voltage is 135MV / m on the polyvinylidene fluoride film coated with metal electrodes, and the duration is 55min; step 4, take out the polyvinylidene fluoride film in the heater and cool it at room temperature to obtain the polarized polyvinylidene fluoride film. The polyvinylidene fluoride film obtained by polarizing in this embodiment has good piezoelectricity, ferroelectricity and pyroelectricity, and the brea...

Embodiment 3

[0022] The polarization method of the polyvinylidene fluoride film comprises the following steps: step 1, the upper and lower planes of the polyvinylidene fluoride film are vapor-deposited with silver with a thickness of 100nm as the metal electrode; step 2, pouring silicone oil into the heater, and Put the polyvinylidene fluoride film coated with metal electrodes into the silicone oil of the heater; step 3, adjust the temperature of the silicone oil in the heater to 90°C, and apply a voltage to the polyvinylidene fluoride coated with metal electrodes, wherein, apply The voltage is 140MV / m on the polyvinylidene fluoride film coated with metal electrodes, and the duration is 50min; step 4, take out the polyvinylidene fluoride film in the heater and cool it at room temperature to obtain the polarized polyvinylidene fluoride film. The polyvinylidene fluoride film obtained by polarizing in this embodiment has good piezoelectricity, ferroelectricity and pyroelectricity, and the bre...

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Abstract

The invention discloses a polarization method of a polyvinylidene fluoride thin film. The polarization method comprises the following steps: S1. evaporating silver which is 90-100nm on the upper and lower planes of the polyvinylidene fluoride thin film as a metal electrode; S2. pouring silicon oil into a heater and putting the polyvinylidene fluoride thin film plated with the metal electrode into silicon oil of the heater; S3. adjusting the temperature of silicon oil in the heater to 80-90 DEG C and applying a voltage to the polyvinylidene fluoride thin film plated with the metal electrode, wherein the voltage applied to the polyvinylidene fluoride thin film plated with the metal electrode is 130-140MV / m for 50-60 minutes; and S4. taking out the polyvinylidene fluoride thin film in the heater and cooling at normal temperature to obtain the polarized polyvinylidene fluoride thin film. The polarized polyvinylidene fluoride thin film disclosed by the invention is good in piezoelectricity, ferroelectricity and pyroelectricity and low in film puncture rate, so that the manufacturing cost of the polyvinylidene fluoride thin film can be lowered, and the polarization method is convenient to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of film manufacture, in particular to a polarization method for polyvinylidene fluoride films. Background technique [0002] PVDF (polyvinylidene fluoride) is a fluorine-containing multifunctional material formed by homopolymerization or copolymerization of vinylidene fluoride monomer. It is a linear crystalline polymer, and its crystallinity is generally between 50 and 70%. Due to the high binding energy of the fluorocarbon chain, it has good heat resistance and corrosion resistance. The applicable temperature range is -40~150 ° C. It can resist oxidants, acids, alkalis, salts, halogens, aromatics, aliphatic hydrocarbons and chlorine. Corrosion and swelling of substitute solvents, excellent anti-ultraviolet and anti-aging properties, and has the characteristics of non-polarity and anti-pollution, especially this material can be dissolved in polar solvents to prepare polymer solutions. Compared with the cur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/45H10N30/098
Inventor 龚伶
Owner 龚伶
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