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Chemical preparation method of doped composite high-Curie-temperature piezoelectric ceramic

A piezoelectric ceramic and high-temperature piezoelectric technology, which is applied in the field of chemical preparation of composite structure high Curie temperature piezoelectric ceramics, can solve the problems of not being able to meet the application requirements of devices, high reaction temperature, and poor performance at the same time

Inactive Publication Date: 2014-12-24
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of the fact that the comprehensive piezoelectric properties of existing piezoelectric ceramic materials cannot meet the application requirements of devices at the same time, and the problems of high reaction temperature and poor performance of ceramic materials prepared by traditional solid-state reaction methods, the present invention provides a high Curie temperature and high piezoelectric coefficient Chemical preparation method of piezoelectric ceramic materials with high purity, uniform and compact structure, excellent comprehensive electrical properties and wide range of adjustment

Method used

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  • Chemical preparation method of doped composite high-Curie-temperature piezoelectric ceramic
  • Chemical preparation method of doped composite high-Curie-temperature piezoelectric ceramic
  • Chemical preparation method of doped composite high-Curie-temperature piezoelectric ceramic

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of 0.55 (0.1BiYbO 3 -0.9PbTiO 3 )-0.45PbZrO 3-0.008Mn ceramics, the starting materials are bismuth nitrate, ytterbium nitrate, lead acetate, manganese nitrate, zirconium nitrate and tetrabutyl titanate, the specific steps are: 1) add the required amount successively under stirring in 6mol / L dilute nitric acid Bismuth nitrate, ytterbium nitrate, zirconium nitrate, manganese nitrate, and heated and stirred to make a clear solution; the required amount of lead acetate was stirred in 30% acetic acid to make a solution; and the required amount of tetrabutyl titanate was added to solution in ethanol. 2) Add citric acid monohydrate in above-mentioned bismuth nitrate, ytterbium nitrate, zirconium nitrate, manganese nitrate solution, stirring and dissolving, the amount of the substance of monohydrate citric acid and scandium, bismuth, zirconium the amount of substance i.e. the sum of moles The ratio is 2:1. Add citric acid monohydrate to the above lead acetate so...

Embodiment 2

[0033] Preparation of 0.55 (0.1BiYbO 3 -0.9PbTiO 3 )-0.45PbZrO 3 -0.005Cr ceramics, the starting materials are bismuth nitrate, ytterbium nitrate, lead acetate, chromium nitrate, zirconium nitrate and tetrabutyl titanate, the specific steps are: 1) add the required amount successively under stirring in 5mol / L dilute nitric acid Bismuth nitrate, ytterbium nitrate, zirconium nitrate, chromium nitrate. And heating and stirring, the solution is finally clear and transparent; the required amount of lead acetate is dispersed in 50% acetic acid, stirred and dissolved; and the required amount of tetrabutyl titanate is dispersed in ethanol. 2) Add citric acid monohydrate in the above-mentioned bismuth nitrate, ytterbium nitrate, zirconium nitrate, chromium nitrate solution, stir and dissolve, the amount of the substance of the monohydrate citric acid is equal to the amount of the substance of scandium, bismuth, zirconium and chromium, i.e. the number of moles. And the ratio is 2.5:1...

Embodiment 3

[0035] Preparation of 0.55 (0.1BiYbO 3 -0.9PbTiO 3 )-0.45PbZrO 3 -0.003Mn-0.004Cr ceramics, the starting materials are bismuth nitrate, ytterbium nitrate, lead acetate, manganese nitrate, chromium nitrate, zirconium nitrate and tetrabutyl titanate, the specific steps are: 1) under stirring in 5mol / L dilute nitric acid Add the required amount of bismuth nitrate, ytterbium nitrate, zirconium nitrate, manganese nitrate and chromium nitrate successively. And heating and stirring, the solution is finally clear and transparent; the required amount of lead acetate is dispersed in 50% acetic acid, stirred and dissolved; and the required amount of tetrabutyl titanate is dispersed in ethanol. 2) Add citric acid monohydrate in the above-mentioned bismuth nitrate, ytterbium nitrate, zirconium nitrate, chromium nitrate solution, stir and dissolve, the amount of the substance of the monohydrate citric acid is equal to the amount of the substance of scandium, bismuth, zirconium and chromiu...

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Abstract

The invention relates to a chemical preparation method of doped composite high-Curie-temperature piezoelectric ceramic. The general formula of the ceramic material is (1-x)(0.1BiYbO3-0.9PbTiO3)-xPbZrO[3-y]Me, wherein x=0.3-0.6, y=0.0005-0.05, and Me is Cr or Mn. The method comprises the following steps: by using salts of bismuth, ytterbium, lead, zirconium, manganese, chromium and titanium as initial raw materials, preparing a uniform solution by using the appropriate dispersion medium and chelator and controlling temperature, concentration and other technical parameters; drying, calcining, carrying out ball milling and drying to prepare nano powder; and granulating, pelleting, sintering, coating silver, and polarizing to obtain the required piezoelectric ceramic. The preparation method has the advantages of stable technique, favorable repetitiveness, low cost, low sintering temperature and the like. The ceramic material prepared by the method is compact and uniform, has the advantages of higher Curie temperature (390-410 DEG C), higher piezoelectric constant (250-370 pC / N), variable mechanical quality factor (50-500) within a wide range, and lower dielectric loss (0.005-0.03), and can satisfy different piezoelectric device demands. The piezoelectric ceramic has favorable application prospects.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and piezoelectric materials, in particular, the invention relates to a chemical preparation method of a composite structure high Curie temperature piezoelectric ceramic with excellent performance. Background technique [0002] Piezoelectric ceramics are widely used in various sensors, actuators and various electronic devices. In recent years, the rapid development of many fields such as aerospace, automobiles, and oil exploration has put forward higher and higher requirements for the applicable capabilities of the selected piezoelectric devices such as high temperature resistance in special environments. For example, acoustic logging transducers, various sensors and drivers in extreme environments, etc., all need to use T c Piezoelectric ceramics above 380°C or even higher. The T of the most commonly used piezoelectric ceramic lead zirconate titanate (PZT) c Generally far below 360°...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/622H10N30/853
Inventor 郭栋江凤王云丽蔡锴
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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