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3-1-2 type polymer/cement piezoelectric composite material and its preparation method

A technology of piezoelectric composite materials and polymers, which is applied in the selection of materials for piezoelectric devices or electrostrictive devices, the manufacture/assembly of piezoelectric/electrostrictive devices, and the selection of device materials, etc., which can solve the processing cycle Long time, low production efficiency, low strength of honeycomb ceramics and other problems

Active Publication Date: 2020-03-10
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both type 2-2 and type 1-3 piezoelectric smart composite materials have high piezoelectric response, but piezoelectric ceramic materials have the disadvantages of high hardness and high brittleness, which are easy to crack during cutting, and the processing cycle is long. extremely inefficient
[0008] CN 103739285A relates to a method for preparing oxide-toughened porous lead zirconate titanate piezoelectric ceramics. The 3-1 type honeycomb porous piezoelectric ceramics prepared by the method has a small pore size of only 100-300 μm, and the cement slurry It is difficult to fully fill the pores inside the ceramic body
In addition, the 3-1 honeycomb ceramics with a through-hole structure have low strength and are easily damaged during subsequent operations

Method used

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  • 3-1-2 type polymer/cement piezoelectric composite material and its preparation method
  • 3-1-2 type polymer/cement piezoelectric composite material and its preparation method
  • 3-1-2 type polymer/cement piezoelectric composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Take 2g of sodium alginate and 6g of lead zirconate titanate piezoelectric ceramic powder, add them into 100ml of water, mix and ball mill for 8 hours, and obtain a uniformly dispersed ceramic slurry.

[0049] Pour the ceramic slurry into a nylon mold, keeping the slurry level at 60 mm. Spray CaCl with a concentration of 1mol / L on the surface of the slurry 2 The solution undergoes a curing reaction to form an initial film with a thickness of 5mm.

[0050] Get 11.1g calcium chloride, 0.1g soluble soybean polysaccharide, add in 50ml water, be mixed with the calcium chloride solution that the concentration that adds metal ion adsorbent is 2mol / L.

[0051] Slowly add the above-mentioned calcium chloride solution added with a metal ion adsorbent into the nylon mold, and let it stand for 12 hours, so that the ceramic slurry in the upper part of the nylon mold forms a calcium alginate ion gel green body with a honeycomb structure. The length of the middle tubular channel is ...

Embodiment 2

[0058] Take 1.5g of sodium alginate and 15g of lead zirconate titanate piezoelectric ceramic powder, add them to 100ml of water, mix and ball mill for 10 hours, and obtain a uniformly dispersed ceramic slurry.

[0059] Pour the ceramic slurry into the nylon mold, keep the liquid level of the slurry at 60mm, and spray CaCl with a concentration of 1mol / L on the surface of the slurry 2 solution, a curing reaction occurs to form an initial film with a thickness of 6mm.

[0060] Get 8.3g calcium chloride, 0.25g chitin, add in 50ml water, prepare the calcium chloride solution that the concentration that adds metal ion adsorbent is 1.5mol / L.

[0061] Add the prepared calcium chloride solution into the nylon mold and let it stand for 18 hours to form a calcium alginate ion gel body with a honeycomb structure with a length of 25 mm long tubular channels.

[0062] Put the nylon mold in a water bath at 50°C, so that the liquid level of the water bath is about 30 mm higher than the botto...

Embodiment 3

[0068] Take 1g of sodium alginate and 25g of lead zirconate titanate piezoelectric ceramic powder, add them to 100ml of water, mix and ball mill for 10 hours, and obtain a uniformly dispersed ceramic slurry.

[0069] Pour the ceramic slurry into the nylon mold, keep the liquid level of the slurry at 60mm, and spray CaCl with a concentration of 1mol / L on the surface of the slurry 2 The solution undergoes a curing reaction to form an initial film with a certain thickness.

[0070] Get 5.6g calcium chloride, 0.75g carboxymethyl chitosan, add in 50ml water, prepare the concentration 1mol / L calcium chloride solution that adds metal ion adsorbent.

[0071] Add the prepared calcium chloride solution into the nylon mold and let it stand for 24 hours to form a calcium alginate ion gel green body with a honeycomb structure. The length of the tubular channel in the green body is 25mm.

[0072] Put the nylon mold in a water bath at 60°C, so that the liquid level of the water bath is abou...

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Abstract

The invention discloses a 3-1-2 type polymer / cement piezoelectric composite material, which uses a sodium alginate ion gel process to prepare a porous piezoelectric ceramic skeleton with tubular channels and a dense ceramic body as the function The body consists of pouring cement slurry into the tubular channel of the ceramic skeleton functional body to form a matrix, and filling the micropores between the ceramic skeleton functional body and the cement matrix with an organic high molecular polymer. The piezoelectric composite material of the present invention has good heat resistance and external impact resistance, and more excellent piezoelectric performance, exhibits good acoustic impedance matching and electromechanical coupling effect and low mechanical quality factor, and is suitable for civil structure detection Demand for highly sensitive sensors.

Description

technical field [0001] The invention relates to a 3-1-2 polymer / cement piezoelectric composite material and a preparation method thereof, and belongs to the technical field of piezoelectric intelligent composite materials and its preparation. Background technique [0002] Large-scale civil engineering structures such as long-span bridges, nuclear power plants, and stadiums are large in scale and complex in structure. During their service, they will continue to be affected by adverse factors such as environmental loads, material aging, fatigue effects, and corrosion effects. Once they fail, the consequences will be Unbelievable. Therefore, it is of great significance to use smart materials and structures for health monitoring and damage assessment of civil engineering structures and their important components in service. [0003] Piezoelectric materials have excellent electromechanical coupling characteristics, and can be used as both sensing materials and driving materials,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/18H01L41/37C04B38/00C04B35/491C04B35/624C04B35/636
CPCC04B35/491C04B35/624C04B35/636C04B38/00C04B38/0003C04B2235/3208H10N30/852H10N30/092
Inventor 刘炜程志吕琳张浩王延忠董英鸽杨金龙
Owner ZHONGBEI UNIV
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