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A sol-solvothermal method for preparing lead zirconate titanate piezoelectric gel

A technology of lead zirconate titanate and solvothermal method, which is applied in the direction of ceramic products, zirconium compounds, chemical instruments and methods, etc., can solve the problems that gels and sols are difficult to obtain, etc., so as to improve mechanical strength, save time and save energy. The effect of aging liquid

Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the asynchronous hydrolysis reactions of the three elements of lead, zirconium, and titanium, it is necessary to add chelating agents or stabilizers such as acetylacetone or glacial acetic acid to the precursor solution to obtain a uniform, transparent and stable sol. gel
On the other hand, in order to prepare PZT airgel, it is necessary to obtain a gel or wet gel with a three-dimensional network structure. However, it is usually difficult to obtain the desired gel after modifying the sol with stabilizers such as acetylacetone and glacial acetic acid.

Method used

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  • A sol-solvothermal method for preparing lead zirconate titanate piezoelectric gel

Examples

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Embodiment 1

[0030] Embodiment 1: Preparation of PZT amorphous airgel

[0031] A sol-solvothermal method for preparing lead zirconate titanate piezoelectric gel, wherein, the molar ratio of ethylene glycol methyl ether: acetylacetone: trihydrate lead acetate: n-propoxide zirconium: tetrabutyl titanate: deionized water is 50:2:2.2:1.04:0.96:55. Specifically include the following steps:

[0032] Step 1, Pb(Zr 0.52 Ti 0.48 )O 3 Sol preparation:

[0033] According to Pb(Zr 0.52 Ti 0.48 )O 3 The stoichiometric ratio, at first 8.34g lead acetate trihydrate is added in the mixed solution of 40ml ethylene glycol methyl ether and 2ml acetylacetone, stir to make it dissolve fully, obtain the precursor solution of lead; Then, add 4.6ml n-propoxide zirconium and Add 3.26ml tetrabutyl titanate to the lead precursor solution obtained above, and keep stirring to obtain a light yellow lead-zirconium-titanium ternary precursor solution; finally, add 9.9ml to the lead-zirconium-titanium ternary prec...

Embodiment 2

[0039] Compared with Example 1, this example increases the annealing process of the airgel, specifically: the PZT airgel obtained in step 3 is placed in a muffle furnace, and the temperature rises from room temperature at a rate of 5°C / min. to 550°C, and kept at 550°C for 0.5h, and annealed. After completion, it was naturally cooled to room temperature and taken out to obtain the crystallized PZT aerogel, which is the lead zirconate titanate piezoelectric electrogel.

Embodiment 3

[0041] Compared with Example 2, this example differs in that: the annealing temperature of the PZT airgel is 600° C., the holding time is 0.5 h, and the rest of the steps are the same as those of Example 2.

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Abstract

A sol-solvothermal method for preparing lead zirconate titanate piezoelectric electrogel belongs to the technical field of functional materials. Firstly, the present invention provides a stable sol that is uniform, transparent, and extremely difficult to gel under normal temperature and pressure by modifying it with acetylacetone without using a vacuum distillation device. Secondly, the sol, which is extremely difficult to gel under normal temperature and pressure, forms a uniform translucent and stable gel in a short period of time by applying external pressure and increasing temperature. Thirdly, high-quality PZT aerogels were prepared efficiently, quickly and material-savingly through supercritical drying. Finally, high-strength PZT crystallized aerogels were obtained by annealing the PZT amorphous aerogels prepared by supercritical drying.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a method for rapidly preparing PZT piezoelectric electrogels through a method of applying pressure and increasing temperature, that is, a sol-solvothermal method. Background technique [0002] PZT ceramics, powders, films and aerogels are typical ABO 3 The perovskite structure multifunctional material is used to prepare electronic components such as sensors, transducers and memories. It is a promising functional material and is widely used in high-tech fields such as electronics, deep sea and aerospace. A lot of research has been done on PZT ceramics, powders and thin films at home and abroad, and many important progress have been made. [0003] PZT airgel not only inherits the excellent characteristics of PZT ceramics, powders and films, but also endows it with novel properties such as low density, large specific surface area and high sensitivity. Howe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/491C04B35/624C04B38/00C01G25/00
CPCC04B35/491C04B35/624C04B38/0045C01G25/006C01P2006/12C01P2006/17
Inventor 廖家轩吴孟强徐自强冯婷婷周海平王武录凯
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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