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Chemical preparation method of piezoelectric ceramic with high Curie temperature of composite system

A piezoelectric ceramic and system technology, applied in the new chemical field of high Curie temperature piezoelectric ceramics, can solve the problems of difficult control of composition, poor process repeatability, high reaction temperature, etc., and achieve low cost, stable process, and low preparation temperature.

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

[0004] Aiming at the inherent problems of high reaction temperature, poor performance, difficult composition control, poor process repeatability and high cost in the solid phase reaction preparation method of existing BMePT piezoelectric ceramic materials (such as PYPT-PZ), the invention provides a high-temperature piezoelectric ceramic A stable and low-cost chemical preparation method. The ceramic products prepared by this method have high purity, uniform and compact microstructure, high Curie temperature and high piezoelectric coefficient, and the comprehensive electrical properties are greatly improved compared with solid-phase products.

Method used

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  • Chemical preparation method of piezoelectric ceramic with high Curie temperature of composite system
  • Chemical preparation method of piezoelectric ceramic with high Curie temperature of composite system

Examples

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Embodiment 1

[0030] The preparation composition is 0.55(0.1BiYbO 3 -0.9PbTiO 3 )-0.45PbZrO 3Ceramics, the starting materials are bismuth nitrate, ytterbium nitrate, lead acetate, zirconium nitrate and tetrabutyl titanate. Concrete steps: 1) Add required amount of bismuth nitrate, ytterbium nitrate, zirconium nitrate successively under stirring in 5mol / L dilute nitric acid, and heat and stir to make clear solution; Add required amount of lead acetate in 50% acetic acid Stir to make a solution; make a solution of the required amount of tetrabutyl titanate in ethanol. 2) Add citric acid monohydrate in above-mentioned bismuth nitrate, ytterbium nitrate, zirconium nitrate solution, stirring and dissolving, the ratio of the amount of substance of citric acid monohydrate and the sum of the amount of substance (number of moles) of scandium, bismuth, zirconium is 2.5:1. Add citric acid monohydrate to the above-mentioned lead acetate solution, stir to dissolve, the molar ratio of the amount of c...

Embodiment 2

[0032] Preparation of 0.6(0.1BiYbO 3 -0.9PbTiO 3 )-0.4PbZrO 3 Ceramics, the starting raw materials are bismuth nitrate, ytterbium nitrate, zirconium nitrate, lead acetate and tetrabutyl titanate, the specific steps are: 1) Add the required amount of bismuth nitrate and ytterbium nitrate in sequence with stirring in 6mol / L dilute nitric acid , zirconium 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 made into a solution in ethanol. 2) Add citric acid monohydrate to the above-mentioned bismuth nitrate, ytterbium nitrate, and zirconium nitrate solutions, and stir to dissolve. The ratio of the amount of citric acid monohydrate to the sum of the moles of scandium, bismuth, and zirconium is 2:1. Add citric acid monohydrate to the above lead acetate solution, stir to dissolve, the molar ratio of the amount of citric acid monohydrate to...

Embodiment 3

[0034] Preparation of 0.5(0.1BiYbO 3 -0.9PbTiO 3 )-0.5PbZrO 3 Ceramics, the starting materials are bismuth nitrate, ytterbium nitrate, zirconium nitrate, lead acetate, and tetrabutyl titanate, the specific steps are: 1) add the required amount of bismuth nitrate, Ytterbium nitrate and zirconium nitrate are heated and stirred to make a clear solution; the required amount of lead acetate is stirred in 70% acetic acid to make a solution; and the required amount of tetrabutyl titanate is made into a solution in ethanol. 2) Add citric acid monohydrate in above-mentioned bismuth nitrate, ytterbium nitrate, zirconium nitrate solution, stirring and dissolving, the ratio of the amount of substance of monohydrate citric acid and the amount of substance of scandium, bismuth, zirconium that is the sum of moles is 3 :1. Add citric acid monohydrate to the above lead acetate solution, stir to dissolve, the molar ratio of the amount of citric acid monohydrate to lead is 3:1; add citric aci...

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Abstract

The invention provides a preparation method of piezoelectric ceramic with high Curie temperature of a composite system. The method comprises the following steps: burdening salts of bismuth, ytterbium, lead, zirconium and titanium as initial raw materials according to the chemical composition of (1-x)(0.1BiYbO3-0.9PbTiO3)-xPbZrO3 (x=0.3-0.6), and then preparing a stable solution by selecting a proper dispersing medium combined with chelation of a stabilizer; forming uniform sol from metal salts by controlling the process conditions such as temperature, concentration and feeding order; concentrating, drying and fully burning to prepare nanoscale piezoelectric ceramic fine powder, so as to pellet, press, discharge and sinter the required piezoelectric ceramic. The preparation method of the high-temperature piezoelectric ceramic of the composite system provided by the invention has the advantages of low preparation temperature, low cost, good repeatability, and uniform and stable sample performance, and has a wide application prospect, and the comprehensive electrical properties can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and piezoelectric materials, in particular, the invention relates to a novel chemical method for preparing high Curie temperature piezoelectric ceramics with excellent performance. Background technique [0002] Piezoelectric ceramics are a class of important functional materials widely used in transducers, sensors, actuators, microelectromechanical systems (MEMS), and various other electronic devices. In recent years, many fields such as aerospace, automobile and oil exploration have put forward higher and higher requirements for the applicability of piezoelectric devices used in special environments, especially their high temperature resistance. For example, acoustic logging transducers and engine nacelle sensors, etc., 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 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/491C04B35/622
Inventor 郭栋江凤廖擎玮蔡锴
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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