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Method for sintering pzt piezoelectric ceramics at low temperature and piezoelectric ceramics

A low-temperature sintering technology for piezoelectric ceramics, applied in the field of piezoelectric ceramics and its preparation, can solve the problems of low-temperature sintering piezoelectric performance deterioration, high sintering temperature, and environmental pollution

Active Publication Date: 2021-04-20
FOSHAN YIQIANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a method for low-temperature sintering of PZT piezoelectric ceramics and piezoelectric ceramics, aiming at solving the problem of the high sintering temperature of piezoelectric ceramics in the prior art and the lead in the material. Extremely volatile, polluting the environment, high energy consumption, and low-temperature sintering piezoelectric performance deterioration

Method used

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  • Method for sintering pzt piezoelectric ceramics at low temperature and piezoelectric ceramics
  • Method for sintering pzt piezoelectric ceramics at low temperature and piezoelectric ceramics
  • Method for sintering pzt piezoelectric ceramics at low temperature and piezoelectric ceramics

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Embodiment 1

[0044]Example 1 Add 10% coprecipitation method to synthesize the PZT mixed powder of the powder

[0045]A sintering method of PZT piezoelectric ceramic, first, the PZT coarse powder synthesized by the solid phase method is placed in deionized water, and a polyethylene glycol comprising the piezoelectric ceramic weight is added, and the PZT powder is dispersed in water. Honestylene; lead, zirconium nitrate, nitrate zirconium, nitrate oxy-nitrate, and the above-mentioned PZT powder, the addition ratio of the three solutions should cause the proportion of lead, zirconium, titanium ions in the solution and PZT The proportion of lead, zirconium and titanium in the coarse powder is consistent, and the addition of the solution is added in accordance with the proportion of the PZT fine powder obtained for the PZT coarse powder, and the agitation is continued to uniformly dispersion. A ammonia water was added dropwise at 15 ml / min at a rate of 15 ml / min, and Pb, Zr, Ti ions were simultaneou...

Embodiment 2

[0047]Example 2 Add 30% coprecipitation method to synthesize the PZT mixed powder of the powder

[0048]A sintering method of PZT piezoelectric ceramic, first, the PZT coarse powder synthesized by the solid phase method is placed in deionized water, and a polyethylene glycerol comprising the piezoelectric ceramic weight of 1%, stirred, and the PZT powder is in the water. Uniform dispersion; then lead the nitrate, nitrate zirconium, nitrate oxitate solution, and the proportion of the addition ratio of the three solutions, the proportion of lead, zirconium and titanium ions in the solution should be added. The proportion of lead, zirconium, titanium in PZT coarse powder is consistent, and the addition of the solution is added in accordance with the proportion of 30% of the PZT fine powder obtained for the PZT coarse powder, and continues to stir the dispersion. A ammonia water was added dropwise at 15 ml / min at a rate of 15 ml / min, and Pb, Zr, Ti ions were simultaneously precipitated...

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Abstract

The invention discloses a method for sintering PZT piezoelectric ceramics at low temperature and piezoelectric ceramics. The method comprises the following steps: putting PZT coarse powder synthesized by a solid phase method into deionized water, adding an appropriate amount of dispersant, and stirring evenly; Add lead nitrate, zirconium oxynitrate, and titanyl nitrate solutions in proportion to the water of the above-mentioned uniformly dispersed PZT powder, and stir evenly; while stirring, add ammonia water dropwise, so that Pb, Zr, and Ti ions are simultaneously precipitated on the surface of the PZT coarse powder, Form the PZT coating powder precipitation, continue to stir for a period of time after the ammonia water is added dropwise; filter, collect the sediment, wash it with water, and dry it; add an appropriate amount of binder to the dried PZT coating powder, pressurize Granulating and passing through a 40-60 mesh sieve to obtain a granulated PZT-coated powder; dry pressing the granulated PZT-coated powder, and sintering in a muffle furnace at 1100-1200°C for 1.5-2.5 hours to obtain PZT piezoelectric ceramics; the sintering temperature of the method is low, the volatilization of lead element is less during the sintering process, and the composition ratio of the finished product is close to the original designed formula.

Description

Technical field[0001]The present invention relates to piezoelectric ceramics and the preparation techniques thereof, and in particular, to a method of low-temperature sintered PZT piezoelectric ceramic and piezoelectric ceramics.Background technique[0002]Piezoelectric ceramic materials are a wide range of applications that can be converted to mechanical energy and electrical energy, have a wide range of applications in resonators, sensors, ultrasonic transducers, filters, electronic igniters, etc. The piezoelectric ceramic refers to a ferroelectric ceramic material having a piezoelectric effect after the DC high pressure polarization. When the polarized piezoelectric ceramic produces a deformation under the action of mechanical force, there is a constant charge in which an equal number of isometric is equal to the two surfaces of the polarization direction, and the density of the charge surface is proportional to the application force. This is called a positive pressure electrical e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/491C04B35/628
CPCC04B35/491C04B35/62818C04B2235/443C04B2235/77C04B2235/96
Inventor 孙小曼李蔚郑文毅
Owner FOSHAN YIQIANG ELECTRONICS
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