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Lead-free piezoelectric ceramic material with high transduction coefficient and preparation method thereof

A lead-free piezoelectric and ceramic material technology, applied in the field of lead-free piezoelectric ceramic materials, can solve the problems of power demand gap and low power density of electronic devices

Active Publication Date: 2021-11-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, currently reported energy harvesting devices have low power densities (μW / mm 3 magnitude and below), there is still a significant gap with the power requirements of electronic devices

Method used

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  • Lead-free piezoelectric ceramic material with high transduction coefficient and preparation method thereof
  • Lead-free piezoelectric ceramic material with high transduction coefficient and preparation method thereof
  • Lead-free piezoelectric ceramic material with high transduction coefficient and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 (comparative example):

[0019] According to the chemical formula 0.90BaTiO 3 -0.10BaZrO 3 Weigh ZrO 2 、BaCO 3 、TiO 2 , milled in a horizontal ball mill for 24 hours with anhydrous ethanol as the medium, and then dried at 100°C. The dried mixture was calcined at 1200 °C for 4 hours, ball milled for 24 hours and dried to obtain 0.90 BaTiO 3 -0.10BaZrO 3 Submicron powder, add 5wt.% polyvinyl alcohol binder for granulation, directly press molding under the pressure of 100MPa, then keep it at 560°C for 9 hours to remove the binder, and finally solidify at 1500°C Phase sintering and heat preservation for 3 hours to obtain dense ceramics.

Embodiment 2

[0021] According to the chemical formula 0.85BaTiO 3 -0.05CaTiO 3 -0.10BaZrO 3 Weighing Weighing ZrO 2 、BaCO 3 , CaCO 3 、TiO 2 , other with embodiment 1.

Embodiment 3

[0023] According to the chemical formula 0.80BaTiO 3 -0.10CaTiO 3 -0.10BaZrO 3 Weighing Weighing ZrO 2 、BaCO 3 , CaCO 3 、TiO 2 , other with embodiment 1.

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Abstract

The invention discloses a lead-free piezoelectric ceramic material with a high transduction coefficient and a preparation method thereof, and belongs to the technical field of lead-free piezoelectric ceramics. CaTiO3 is used as a phase structure conditioning agent to be introduced into a binary ferroelectric system BaZrO3-BaTiO3, and a lead-free solid solution with trigonal-orthogonal-tetragonal-cubic continuous phase transition is obtained. The lead-free solid solution ceramic with the trigonal-orthogonal coexisting phase has the characteristics of high piezoelectric constant and low dielectric constant, and has an important prospect in the application field of lead-free piezoelectric ceramic energy collectors.

Description

technical field [0001] The invention belongs to the technical field of lead-free piezoelectric ceramic materials, and in particular relates to a lead-free ferroelectric material with high energy conversion coefficient and a preparation method thereof, which can be applied to energy collection devices. Background technique [0002] With the rapid development of Internet of Things technology, how to provide continuous power supply for miniaturized and integrated terminal equipment has become a key issue restricting its development. Piezoelectric energy harvesting technology, which can convert the ubiquitous mechanical energy in the environment into reusable electrical energy, is a potential solution to realize self-powering of microelectronic devices in complex environments. Energy harvesting devices based on the piezoelectric effect have the characteristics of high energy conversion efficiency, high output voltage, immunity to electromagnetic interference, and easy miniaturiz...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622C04B41/88
CPCC04B35/468C04B35/622C04B41/5116C04B41/88C04B2235/3236C04B2235/3248C04B2235/96
Inventor 郑木鹏高冲晏晓东侯育冬朱满康
Owner BEIJING UNIV OF TECH
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