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Method for preparing piezoelectric ceramic blank film

A technology of piezoelectric ceramics and blank film, which is applied in the field of preparation of piezoelectric ceramic blank film, which can solve the requirements of low density, affecting the piezoelectric and dielectric properties of piezoelectric products, and difficult to meet the requirements of thinning piezoelectric ceramic devices and other problems, to achieve the effect of simple processing flow and low manufacturing cost

Inactive Publication Date: 2008-09-17
JIANGSU YUCHENG ELECTRONICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing rolling forming method cannot prepare piezoelectric ceramic green films with a thickness of less than 0.1 mm, and the thickness of the thinnest piezoelectric ceramic green films produced is also greater than 0.1 mm, or even greater than 0.2 mm, and the density is low. It is difficult to meet the requirements of thinning piezoelectric ceramic devices, and it affects the improvement of piezoelectric performance and dielectric performance of piezoelectric products

Method used

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Embodiment Construction

[0009] A method for preparing a piezoelectric ceramic green film of the present invention comprises the following steps in sequence: adding a binder to the piezoelectric ceramic powder, rough rolling, finish rolling and punching, and the innovative point is that the binder is added The amount is 15% to 25% by weight of the piezoelectric ceramic powder. At a temperature of 20 to 30°C, the powder with the binder added is mixed and roughly rolled in a film rolling machine. After 4 to 8 hours, a thickness of Cut the roughly 2mm rough rolling strip into 5×8cm blanks, pack them with plastic film for later use, and then finish rolling the above-prepared blanks in a finish rolling film machine at a temperature of 20-30°C, and gradually Reduce the distance between the two rollers of the finish rolling machine, and after 1-2 hours of finish rolling, a finish-rolled blank strip with a thickness of 0.05-0.1mm is obtained, which is packed with a plastic film for use, and finally the finish-...

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Abstract

The invention discloses a method for producing piezoelectric ceramic membrane. The method comprises the following steps: adding a binder in piezoelectric ceramic powder, rough rolling, fine rolling and punching. The method is characterized in that: the additional amount of the binder is 15-25% the weight of the piezoelectric ceramic powder, the powder containing the binder is stirred and rolled for 4-8 hours at 20-30 DEG C to produce rough-rolled blank belt, the blank belt is sliced and wrapped with plastic film and then is subject to fine rolling for 1-2 hours at 20-30 DEG C to produce a fine-rolled blank belt, the fine-rolled blank belt is wrapped with plastic film and then punched to produce the piezoelectric ceramic membrane; and the binder is composed of the following components in weight percentages: polyvinyl alcohol 5-20%, glycerol 3-10%, ethanol 0-10% and distilled water in balance. The method is simple and has low cost. The piezoelectric ceramic membrane has ultrathin thickness (0.05-0.1 mm) and high density; and is widely used for piezoelectric ceramic electro-acoustic transducers and other thin piezoelectric products.

Description

technical field [0001] The invention relates to a preparation method of a piezoelectric ceramic blank film, in particular to a preparation method of an ultra-thin piezoelectric ceramic high-density blank film. Background technique [0002] Piezoelectric ceramics are functional materials that can convert mechanical energy to electrical energy, and are widely used in military, transportation, commercial and medical fields. During the preparation process of the piezoelectric ceramic blank film, blank forming is one of the very important processes. With the development of thinning piezoelectric ceramic devices, the green film is required to be thinner and thinner, and the preparation method of ultra-thin green sheet is a key issue. At present, the methods for preparing piezoelectric ceramic green film mainly include tape casting method and film rolling method. The equipment of the tape casting method is expensive, and high-performance slurry must be prepared at the same time. ...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/63B28B3/00
Inventor 徐国荣程锬顺高春华王韶华
Owner JIANGSU YUCHENG ELECTRONICS
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