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A kind of preparation method of anti-fracture thermally stable piezoelectric material

A piezoelectric material and thermal stability technology, applied in the field of piezoelectric materials, can solve the problems of piezoelectric materials such as easy fracture, poor fracture resistance, and poor thermal stability, so as to improve fracture resistance and tear resistance , The effect of improving thermal stability

Active Publication Date: 2020-11-13
SHENZHEN HANKE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a fracture-resistant thermally stable piezoelectric material for the defects of poor fracture resistance and poor thermal stability of current piezoelectric materials, which lead to piezoelectric materials being easily broken and thermally decomposed. Preparation

Method used

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  • A kind of preparation method of anti-fracture thermally stable piezoelectric material

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example 1

[0024]Put 100g of graphite block into the grinder and grind it, pass through a 50-mesh sieve to obtain the sieve, place the sieve in a beaker, place the beaker in an ice-water bath, impregnate the sieve with a mass fraction of 80% sulfuric acid solution, Use a stirrer to mix and stir at a speed of 500r / min for 100min to obtain a mixed suspension, add potassium permanganate powder with a mass of 5% of the mixed suspension to the beaker, and continue to mix and stir at a speed of 500r / min for 2h to obtain Mixed solution; put the mixed solution and citric acid solution with a mass fraction of 20% into a three-necked flask, put the three-necked flask into a water bath with a water bath temperature of 50°C, and mix and stir for 60 minutes with a stirrer at a speed of 300r / min to prepare To obtain a mixed dispersion, dropwise add 5% of the mixed dispersion mass to a silver nitrate solution with a mass fraction of 10% in a three-necked flask, and let it stand for 2 hours at room tempe...

example 2

[0026] 120g of graphite block is put into the grinder and ground, and the sieve is obtained through a 50 mesh sieve, the sieve is placed in a beaker, the beaker is placed in an ice-water bath, and the sieve is impregnated with a sulfuric acid solution with a mass fraction of 85%. Mix and stir with a stirrer at a speed of 520r / min for 110min to obtain a mixed suspension, add potassium permanganate powder with a mass of 7% of the mixed suspension to the beaker, continue to mix and stir at a speed of 520r / min for 2.5h, and prepare Obtain a mixed solution; put the mixed solution and the citric acid solution with a mass fraction of 22% into a three-necked flask, put the three-necked flask into a water bath with a water bath temperature of 55° C., mix and stir for 70 min with a stirrer at a speed of 320 r / min, Prepare the mixed dispersion liquid, dropwise add the silver nitrate solution with a mass fraction of 7% of the mixed dispersion liquid mass to 12% in the three-necked flask, l...

example 3

[0028] Put 150g of graphite blocks into the grinder and grind them through a 50-mesh sieve to obtain a sieve, place the sieve in a beaker, place the beaker in an ice-water bath, and impregnate the sieve with a mass fraction of 90% sulfuric acid solution, Use a stirrer to mix and stir at a speed of 550r / min for 120min to obtain a mixed suspension, add potassium permanganate powder with a mass of 8% of the mixed suspension to the beaker, and continue to mix and stir at a speed of 550r / min for 3h to obtain Mixed solution; put the mixed solution and citric acid solution with a mass fraction of 25% into a three-necked flask, put the three-necked flask into a water bath with a water bath temperature of 60°C, and mix and stir with a stirrer at a speed of 330r / min for 80min to prepare To obtain the mixed dispersion, dropwise add 8% of the mixed dispersion mass to a silver nitrate solution with a mass fraction of 15% in a three-necked flask, and let it stand for 3 hours at room temperat...

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Abstract

The invention relates to a preparation method of an anti-breaking thermostable piezoelectric material and belongs to the technical field of piezoelectric materials. Graphite powder is placed in sulfuric acid and subjected to reaction with potassium permanganate to generate graphene oxide; graphene has good mechanical properties and helps improve anti-breaking capacity of the piezoelectric material; the graphene oxide combines silver ions, after high-temperature calcining, the graphene oxide is reduced into graphene material, graphene and silver ions can be combined more tightly, and therefore,graphene has better thermostability and thermostability of the piezoelectric material is improved. Graphene oxide and tetrabutyl titanate are mixed herein; the mechanical properties of the piezoelectric material are enhanced through covalent bonding of the tetrabutyl titanate with the graphene oxide, intermolecular acting force and other chemical bonding attraction, thereby improving anti-breaking capacity of the piezoelectric material; the graphene oxide, the tetrabutyl titanate and the silver ions have excellent thermostability, and therefore, thermostability of the piezoelectric material is further enhanced, and the piezoelectric material has a promising application prospect.

Description

technical field [0001] The invention relates to a preparation method of a fracture-resistant thermally stable piezoelectric material, which belongs to the technical field of piezoelectric materials. Background technique [0002] Piezoelectric materials are crystalline materials that generate a voltage between their two ends when pressure is applied. The mutual conversion between mechanical vibration (sound wave) and alternating current can be realized by using piezoelectric material. [0003] The principle of the piezoelectric effect is that if a pressure is applied to a piezoelectric material, it will generate a potential difference (called the direct piezoelectric effect), and vice versa, a mechanical stress will be generated (called the inverse piezoelectric effect). If pressure is a high-frequency vibration, what is produced is a high-frequency current. When a high-frequency electrical signal is applied to the piezoelectric ceramic, a high-frequency acoustic signal (me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/08C04B18/02C04B111/90
CPCC04B18/023C04B26/08C04B2111/90C04B14/06C04B14/306C04B14/303C04B14/308C04B14/305C04B14/024
Inventor 裘友玖蒋东明王素香
Owner SHENZHEN HANKE NEW MATERIAL TECH CO LTD