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High-temperature piezoelectric energy collection ceramic material with wide-temperature stable transduction coefficient and preparation

A ceramic material and high-temperature piezoelectric technology, applied in the field of piezoelectric ceramic materials, can solve the problems of excellent conversion coefficient and temperature stability materials that have not been reported yet, and achieve enhanced electromechanical conversion capability, excellent temperature stability, and enhanced temperature reliability sexual effect

Active Publication Date: 2022-04-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the excellent conversion coefficient and temperature stability materials of this patent system have not been reported

Method used

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  • High-temperature piezoelectric energy collection ceramic material with wide-temperature stable transduction coefficient and preparation
  • High-temperature piezoelectric energy collection ceramic material with wide-temperature stable transduction coefficient and preparation
  • High-temperature piezoelectric energy collection ceramic material with wide-temperature stable transduction coefficient and preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh Bi according to the chemical formula 0.365BS-0.005BZT-0.630PT (0.5-630 for short) 2 o 3 、Sc 2 o 3 , ZnO, Ta 2 o 5 , Pb 3 o 4 and TiO 2 , and ball milled for 24 hours with ethanol as the medium. After the mixture was dried at 100°C, it was calcined at 800°C for 2 hours; then anhydrous ethanol was added for secondary ball milling for 24 hours, and a binder with a mass fraction of about 5wt.% was added to the dried powder, granulated and sieved , Pressed into a ceramic green body, sintered at 1150 ° C after debinding treatment, kept for 2 hours, and cooled to room temperature with the furnace. After the sintered ceramic samples were polished, silver electrodes were fired, and then placed in silicone oil at 120°C and polarized at a voltage of 4kV / mm for 30min. After aging at room temperature for 24 hours, the electrical properties of the ceramic samples were tested.

Embodiment 2

[0035] The preparation of 0.37BS-0.01BZT-0.620PT (abbreviated as 1-620) ceramic material is the same as in Example 1.

Embodiment 3

[0037] The preparation of 0.36BS-0.02BZT-0.620PT (abbreviated as 2-620) ceramic material is the same as in Example 1.

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Abstract

The invention discloses a high-temperature piezoelectric energy collection ceramic material with a wide-temperature stable transduction coefficient and preparation, and belongs to the field of piezoelectric ceramic materials. The chemical composition of a matrix of the ceramic material is zBiScO3-yBi (Zn2 / 3Ta1 / 3) O3-xPbTiO3 (x is greater than or equal to 0.605 and less than or equal to 0.64, y is greater than or equal to 0.005 and less than or equal to 0.03, and z is equal to 1-x-y). The preparation method comprises the following steps: firstly, weighing corresponding raw materials according to a stoichiometric ratio, and then sequentially carrying out wet grinding, drying, calcining, granulating, compression molding and sintering. The high-temperature piezoelectric ceramic material provided by the invention has high and thermally stable transduction coefficients in a wide temperature range, is beneficial to enhancing the working stability of a high-temperature piezoelectric energy collection device, and has remarkable social significance and application value.

Description

technical field [0001] The invention belongs to the field of piezoelectric ceramic materials, and in particular relates to a piezoelectric ceramic material with a high and temperature-stable energy conversion coefficient used in high-temperature piezoelectric energy collection in a wide temperature range and a preparation method thereof. Background technique [0002] The development of advanced fields such as aerospace, nuclear energy conversion, and unmanned driving have significantly promoted human progress. At the same time, a large number of wireless sensors have been invested in these fields for structural health monitoring, data collection and transmission, etc., so as to provide real-time feedback on the operating status of equipment and ensure its safety. In these fields, the working environment temperature of microsensors is not less than 200°C, and even reaches 300°C, which poses a huge challenge to the power supply method. The existing power supply methods are ma...

Claims

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Application Information

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IPC IPC(8): C04B35/472C04B35/622H02N2/18C04B41/88
Inventor 侯育冬于肖乐郑木鹏朱满康
Owner BEIJING UNIV OF TECH
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