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Ceramic-metal leadless piezoelectric composite material with micron internal crystal structure and preparation method thereof

A technology of piezoelectric composite materials and composite materials, which is applied in the field of ferroelectric composite materials and their preparation, can solve problems such as the inability to significantly improve the energy conversion coefficient of materials

Active Publication Date: 2021-04-30
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this method cannot significantly improve the energy conversion coefficient of the material

Method used

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  • Ceramic-metal leadless piezoelectric composite material with micron internal crystal structure and preparation method thereof
  • Ceramic-metal leadless piezoelectric composite material with micron internal crystal structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to chemical formula Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 o 3 / 0.5mol.%Ag Weighing Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 o 3 and Ag 2 O, and ball milled in ethanol for 10 h. The mixture was dried and pressed directly at 200MPa, and then sintered at 1450°C for 3 hours to obtain a composite material with a heating rate of 5°C / min. It is worth pointing out that during the sintering process, when the temperature is 250–300 °C, Ag 2 O is decomposed into Ag and O 2 .

Embodiment 2

[0024] According to chemical formula Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 o 3 / 1mol.%Ag Weighing Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 o 3 and Ag 2 O, other with embodiment 1.

Embodiment 3

[0026] According to chemical formula Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 o 3 / 2mol.%Ag Weighing Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 o 3 and Ag 2 O, other with embodiment 1.

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Abstract

The invention discloses a ceramic metal leadless piezoelectric composite material with a micron internal crystal structure and a preparation method, and belongs to the technical field of piezoelectric composite materials. The micron-sized Ag metal particles are used as a second phase and are uniformly distributed in the BCTZ ceramic crystal grains to form a micron internal crystal structure. Due to the existence of the special micron structure, a high piezoelectric constant and a low dielectric constant are obtained in the piezoelectric material at the same time, and important prospects are achieved in the application field of piezoelectric energy collectors.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric composite materials, and in particular relates to a ferroelectric composite material with high piezoelectric constant and low dielectric constant that can be applied to energy collection devices and a preparation method thereof. Background technique [0002] Under the background of the energy crisis, how to collect and convert waste energy in the environment into reusable electric energy has attracted the attention of governments, academia and the general public. Among them, energy harvesting devices based on the piezoelectric effect can convert mechanical energy generated in the environment into electrical energy, and have the characteristics of high energy conversion efficiency, high output voltage, immunity to electromagnetic interference, and easy miniaturization, so they have broad application prospects. However, currently reported energy harvesting devices have low power densities (μW / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622B22F9/30B22F1/00H10N30/853
CPCC04B35/468C04B35/622B22F9/30C04B2235/3208C04B2235/3244C04B2235/6562C04B2235/6567B22F1/054
Inventor 郑木鹏晏晓东侯育冬朱满康
Owner BEIJING UNIV OF TECH
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