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Relaxation ferroelectric lead-based ceramic material with high phase change temperature, excellent fatigue resistance and high electromechanical performance, and preparation method and application thereof

A technology of phase transition temperature and fatigue resistance, which is applied in the field of preparation and application of relaxor ferroelectric lead-based ceramic materials with high phase transition temperature, excellent fatigue resistance and high electromechanical performance, and can solve the problem of poor electrical fatigue resistance , can not take into account the problems of high electromechanical performance, high phase transition temperature, excellent fatigue resistance, low phase transition temperature, etc., to achieve the effect of improving the quality of directional texture, excellent fatigue resistance, and high phase transition temperature

Active Publication Date: 2022-05-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low phase transition temperature and poor electrical fatigue resistance of relaxor ferroelectric ceramic materials in the prior art, and cannot take into account high electromechanical performance, high phase transition temperature and excellent fatigue resistance, and contains Zr There are thermodynamic problems in the preparation process of relaxation-like ferroelectric texture ceramics, and a kind of relaxation ferroelectric lead-based ceramic material with high phase transition temperature, excellent fatigue resistance and high electromechanical performance, preparation method and application are provided

Method used

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  • Relaxation ferroelectric lead-based ceramic material with high phase change temperature, excellent fatigue resistance and high electromechanical performance, and preparation method and application thereof
  • Relaxation ferroelectric lead-based ceramic material with high phase change temperature, excellent fatigue resistance and high electromechanical performance, and preparation method and application thereof
  • Relaxation ferroelectric lead-based ceramic material with high phase change temperature, excellent fatigue resistance and high electromechanical performance, and preparation method and application thereof

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specific Embodiment approach 1

[0029] Specific Embodiment 1: This embodiment is a relaxor ferroelectric lead-based ceramic material with high phase transition temperature, excellent fatigue resistance and high electromechanical properties. Its general chemical formula is (1-x-y)Pb(A,Nb)O 3 -xPbZrO 3 -yPbTiO 3 -awt.%B, where A is one or two of Mg, Yb, Sc and In, B is CuO, Li 2 CO 3 , ZnO, Sm 2 o 3 , PbO and B 2 o 3 One or two of them, 0.12≤x≤0.49, 0.25≤y≤0.49, and 1-x-y≥0.10, 0≤a≤3;

[0030] The relaxation ferroelectric lead-based ceramic material with high phase transition temperature, excellent fatigue resistance and high electromechanical properties is developed along [001] c or[111] c Composed of grains with preferred orientation, the preferred orientation degree is above 90%;

[0031] The trigonal-tetragonal phase transition temperature T of the relaxor ferroelectric lead-based ceramic material with high phase transition temperature, excellent fatigue resistance and high electromechanical prope...

specific Embodiment approach 2

[0033] Specific embodiment two: the preparation method of the relaxation ferroelectric lead-based ceramic material with high phase transition temperature, excellent fatigue resistance and high electromechanical performance in this embodiment, it is completed according to the following steps:

[0034] 1. Preparation of pure perovskite phase matrix fine powder:

[0035] ①. According to the general chemical formula, it is (1-x-y)Pb(A,Nb)O 3 -xPbZrO 3 -yPbTiO 3 - The stoichiometric ratio of awt.% B weighs PbO powder, material powder containing A and Nb, ZrO 2 Powder, TiO 2 Powder and sintering aid powder B; where 0.12≤x≤0.49, 0.25≤y≤0.49, and 1-x-y≥0.10, 0≤a≤3; the material powder containing A and Nb is MgNb 2 o 6 , YbNbO 4 , ScNbO 4 and InNbO 4 One or two of them; the sintering aid powder B is CuO, Li 2 CO 3 , ZnO, Sm 2 o 3 , PbO and B 2 o 3 one or both of them;

[0036] ②. Using absolute ethanol as the medium, symmetrically take PbO powder, material powder contain...

specific Embodiment approach 3

[0044] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the PbO powder described in step one ①, the material powder containing A and Nb, ZrO 2 Powder, TiO 2 The purity of powder and sintering aid powder B is all greater than 99%; the ZrO described in step 1. 2 Powder and TiO 2 The particle size of the powder is less than 70nm. Others are the same as in the second embodiment.

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Abstract

The invention discloses a relaxor ferroelectric lead-based ceramic material with high phase change temperature, excellent fatigue resistance and high electromechanical performance and a preparation method and application thereof, and relates to a relaxor ferroelectric lead-based ceramic material and a preparation method and application thereof. The problems that in the prior art, a relaxor ferroelectric ceramic material is low in phase change temperature and poor in electrical fatigue resistance, and high electromechanical performance, high phase change temperature and excellent fatigue resistance cannot be considered at the same time are solved, and the thermodynamic problem exists in the preparation process of Zr-containing relaxor ferroelectric texture ceramic. The general chemical formula of the relaxor ferroelectric lead-based ceramic material is (1-x-y) Pb (A, Nb) O < 3-x > PbZrO < 3-y > PbTiO < 3-a > wt.% B. The method comprises the following steps: 1, preparing pure perovskite phase parent fine powder; 2, preparing a ceramic green body by a tape casting method; and 3, preparing the textured ceramic material. The method is applied to piezoelectric actuators, intelligent sensors, ultrasonic transducers and energy collectors.

Description

technical field [0001] The invention relates to a relaxor ferroelectric lead-based ceramic material, a preparation method and an application. Background technique [0002] As a very important class of electronic functional materials, relaxor PbTiO 3 Ferroelectric ceramics are expected to be widely used in the preparation of various electromechanical conversion components due to their unique electromechanical conversion properties, such as piezoelectric actuators, ultrasonic transducers, smart sensors, energy harvesters, etc. Traditional Binary PbTiO 3 The base relaxor ferroelectric system has short plates such as low phase transition temperature (such as Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -PbTiO 3 Its trigonal-tetragonal phase transition temperature T r-t Only ~60-100°C), which can no longer meet the application requirements of developing a new generation of electronic devices for high phase transition temperature and high electromechanical performance. The development of ternary ...

Claims

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Application Information

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IPC IPC(8): C04B35/499C04B35/622C04B35/638C04B35/64
CPCC04B35/499C04B35/622C04B35/638C04B35/64C04B2235/3206C04B2235/3244C04B2235/3281C04B2235/6025C04B2235/6562C04B2235/6567C04B2235/768
Inventor 常云飞刘琳婧谢航寇蔷薇孙媛吕蕊杨彬
Owner HARBIN INST OF TECH
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