Method for preparing PZT-based composite piezoelectric ceramic and PZT-based composite piezoelectric ceramic

A piezoelectric ceramic and piezoelectric technology, applied in the field of piezoelectric ceramic material preparation, can solve the problems that are not given, not proposed, and reduce the resistance of PZT piezoelectric ceramics, so as to achieve the effect of ensuring sufficient polarization and increasing output current

Active Publication Date: 2017-03-15
BEIJING HENGTONG GREEN BUILDING ENERGY EFFICIENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above two types of patents do not involve the application of piezoelectric power generation, so there is no need to reduce the resistance of PZT piezoelectric ceramics, nor does it raise the need to reduce the resistance of PZT piezoelectric ceramics, and does not give any information on how to reduce the resistance of PZT piezoelectric ceramics plan

Method used

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  • Method for preparing PZT-based composite piezoelectric ceramic and PZT-based composite piezoelectric ceramic

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preparation example Construction

[0030] The preparation method of the PZT-based composite piezoelectric ceramics comprises the following steps:

[0031] (1) Preparation of graphene oxide (GO)

[0032] Synthesize graphene oxide using the modified Hummers method: first perform low-temperature intercalation in an ice-water bath: add an appropriate amount of concentrated sulfuric acid to the container, and then follow the mass ratio of 1:2-4:1 (preferably 2:1) under magnetic stirring Add graphite powder and sodium nitrate, then slowly add potassium permanganate whose mass is 3 times that of graphite powder, stir at 0-6°C for 1-2h, then warm up to room temperature, and continue stirring at room temperature for 1-24h; Then dilute the sample with low temperature (preferably 0-2°C) deionized water, raise the temperature to 90°C and stir for 5-30min, then add an appropriate amount of H 2 o 2 reaction, followed by dilution with deionized water; then repeated washing with appropriate concentrations of HCl and ethanol,...

Embodiment 1

[0043] (1) Preparation of graphene oxide (GO)

[0044] Weigh 6 g of graphite powder, 3 g of sodium nitrate, and 18 g of potassium permanganate, and slowly add 150 ml of concentrated sulfuric acid with a concentration of 98% into the three raw materials successively, and the temperature of the concentrated sulfuric acid is 2° C. After the mixture was kept at 0-2°C and stirred for 60 minutes, the temperature was adjusted to 30°C, and then kept stirring for 120 minutes. Subsequently, 300 ml of deionized water at a temperature of 2° C. was slowly added while increasing the stirring speed. Raise the temperature to 90° C., heat for 5 minutes, and then add 12 ml of 30% hydrogen peroxide. Then add 500ml of deionized water to dilute the acid solution, and the concentration of graphene oxide is about 7.5mg / ml. The above solution was washed twice with 200ml of hydrochloric acid and 200ml of ethanol respectively, and then washed with deionized water until a neutral hydrogel appeared, an...

Embodiment 2

[0055] (1) Preparation of graphene oxide (GO)

[0056] Weigh 5g of expanded graphite powder, 2.5g of sodium nitrate, and 15g of potassium permanganate, and slowly add 120ml of concentrated sulfuric acid with a concentration of 98% to the three raw materials successively, and the temperature of the concentrated sulfuric acid is 0°C. After the mixture was kept at 0-2°C and stirred for 120 minutes, the temperature was adjusted to 35°C, and then kept stirring for 120 minutes. Then slowly add 250ml of deionized water at a temperature of 2°C, while increasing the stirring speed to suppress the generation of air bubbles. After raising the temperature to 90° C., heat the mixture for 30 minutes, and then add 10 ml of 30% hydrogen peroxide. Then add 300ml of deionized water to dilute the acid solution, and the concentration of graphene oxide is about 9mg / ml. The above solution was washed twice with 100ml of hydrochloric acid and 200ml of ethanol respectively, and then washed with deio...

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Abstract

The invention provides a method for preparing PZT-based composite piezoelectric ceramic. The method includes the following steps that firstly, graphene oxide is prepared; secondly, PZT piezoelectric powder is wrapped with graphene oxide; thirdly, pre-sintering is conducted; fourthly, fine grinding is conducted; fifthly, discharge plasma sintering is carried out. The PZT-based composite piezoelectric ceramic comprises PZT and graphene, and the PZT-based composite piezoelectric ceramic has the electrical conductivity ranging from 0.5*10<-6>S/m to 2.3*10<-5>S/cm. The invention provides a piezoelectric power generation device comprising the PZT-based composite piezoelectric ceramic and application of the PZT-based composite piezoelectric ceramic in piezoelectric power generation.

Description

technical field [0001] The invention relates to the field of piezoelectric ceramic material preparation, in particular to a preparation method of PZT-based composite piezoelectric ceramics and PZT-based composite piezoelectric ceramics. Background technique [0002] Since the discovery of perovskite lead zirconate titanate (PZT) piezoelectric ceramics, PZT has become the most widely used piezoelectric material due to its high electromechanical coupling coefficient, stable performance, low cost, and easy doping modification. . Since the use of the positive piezoelectric effect of piezoelectric materials for power generation has the advantages of environmental protection and energy saving, a large number of patents on the use of piezoelectric materials for piezoelectric power generation devices have been proposed in recent years, for example: CN105680724A records a modular underground A piezoelectric power generating device; CN201956927U records a piezoelectric power generati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/64
CPCC04B35/491C04B35/64C04B2235/425C04B2235/666
Inventor 宋波袁征李艳杰
Owner BEIJING HENGTONG GREEN BUILDING ENERGY EFFICIENT TECH CO LTD
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