Narrow slit coating unit, method and device

A technology of slit coating and coating method, which is applied in the field of piezoelectric composite material preparation, can solve problems such as low efficiency of electric domain steering, poor polarization effect, and inability to effectively mass produce, so as to improve the polarization effect and save Process time, effect of improving piezoelectric performance

Pending Publication Date: 2020-11-27
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the use of oil bath polarization requires high quality piezoelectric films and cannot be mass-produced effectively. On the other hand, during the oil bath polarization process, the crystal grains in the piezoelectric films are fixed , so it cannot be effectively deflected by the polarization electric field, and the electric domain steering is very inefficient, resulting in poor final polarization effect, which in turn affects the piezoelectric properties of the piezoelectric film

Method used

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  • Narrow slit coating unit, method and device
  • Narrow slit coating unit, method and device
  • Narrow slit coating unit, method and device

Examples

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Effect test

Embodiment 1

[0059] Please also refer to figure 1 and figure 2 , figure 1 It is a schematic structural view of the slit coating device disclosed in Embodiment 1 of the present invention, figure 2 It is an exploded schematic diagram of the structure of the slit coating device disclosed in the first practical embodiment. The slit coating device disclosed in this embodiment can be applied to slit coating equipment to coat piezoelectric composite materials to form piezoelectric films. Specifically, the slit coating device 100 includes a first clamping block 10 , a second clamping block 20 and an insulating clamping piece 30 . Wherein, the first clamping block 10 includes a first clamping portion 11 and a first electrical connection portion 12 , and the first electrical connection portion 12 is insulated and connected to the first clamping portion 11 . The second clamping block 20 includes a second clamping portion 21 and a second electrical connection portion 22 insulated from the second...

Embodiment 2

[0099] see Figure 6 and the above figure 2 , Figure 5 , is a coating method using a slit coating device disclosed in an embodiment of the present invention. The coating method can use a slit coating device 100 to coat a slurry of a piezoelectric composite material to obtain a piezoelectric film. Specifically, the slit coating device 100 may be the slit coating device 100 described in the first embodiment above, and the coating method may include the following steps:

[0100] 201. Clamp and fix the insulating clip between the first clamping block and the second clamping block.

[0101] The purpose of this step is to fix the insulating clip 30, the first clip 10, and the second clip 20 to form a slit between the first clip 10 and the second clip 20, so as to facilitate the subsequent slurry flow.

[0102] 202. Power on the first power connection part and the second power connection part.

[0103] The purpose of this step is to form an electric field between the first ele...

Embodiment 3

[0116] see Figure 7 , Embodiment 3 of the present invention discloses a slit coating device 300, which may include the slit coating device 100 as described in Embodiment 1 above. Specifically, the slit coating equipment 300 may include a main body 301 of the equipment, and the main body 301 of the equipment may be provided with a pipeline to deliver the slurry to the cavity 101 of the slit coating device 100 through the feed port 102 . At the same time, the equipment main body 301 can be used to control the conveying speed and flow rate of the slurry at the feed port 102, and correspondingly, the electric field intensity formed by the first electrical connection part 12 and the second electrical connection part 22 can also be controlled, and The flow rate of the slurry in the flow channel 31 and the like.

[0117] The slit coating equipment 300 disclosed in Embodiment 3 of the present invention has the functions of coating and polarization of piezoelectric composite slurry b...

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Abstract

The invention discloses a narrow slit coating unit, method and device. The narrow slit coating unit comprises a first clamping block, a second clamping block and an insulation clamping piece which isfixedly arranged between the first clamping block and the second clamping block, the first clamping block comprises a first clamping part and a first electrifying part in insulated connection with thefirst clamping part, and the second clamping block comprises a second clamping part and a second electrifying part in insulated connection with the second clamping part. The first clamping part is fixedly connected with the second clamping part, the second electrifying part is fixedly connected with the first electrifying part, a flow channel is formed in the insulation clamping piece and used for slurry to flow, and the first electrifying part and the second electrifying part are used for being connected into an electric field so as to polarize grains and/or the electric domain of the slurryin the flow channel. According to the narrow slit coating unit, method and device, the polarization effect of the grains and/or the electric domain of the slurry can be effectively improved, the piezoelectric property is improved, moreover, the time and cost for the process can be saved, and the volume production of piezoelectric films is facilitated.

Description

technical field [0001] The invention relates to the technical field of piezoelectric composite material preparation, in particular to a slit coating device, a coating method, and slit coating equipment. Background technique [0002] With the biometric ultrasonic module, artificial skin, pressure sensing, vibration feedback and other application fields, the performance requirements of piezoelectric films are gradually increasing (usually requiring a higher piezoelectric constant component D33 and higher windability). In the related art, piezoelectric composite materials are mostly used to obtain the film by scrape coating process, and then the film is polarized in an oil bath to finally obtain the piezoelectric film. However, on the one hand, the use of oil bath polarization requires high quality piezoelectric films and cannot be mass-produced effectively. On the other hand, during the oil bath polarization process, the crystal grains in the piezoelectric films are fixed , s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C5/00B05C11/00B05D3/14B05D1/26B05D7/24
CPCB05C5/005B05C11/00B05D1/26B05D3/14B05D7/24
Inventor 李宋楚
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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