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Submicron-crystal-scale piezoelectric energy collecting material and preparation method thereof

An energy harvesting, sub-micron technology, applied in the field of piezoelectric ceramic materials, can solve the problems of high conversion coefficient and disadvantages, and achieve the effect of high conversion coefficient

Active Publication Date: 2017-08-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, previous research has found that when the grain size of many piezoelectric ceramics is reduced from micron to submicron, the decrease in the piezoelectric strain constant of the material is much greater than the decrease in the dielectric constant, which is not conducive to obtaining high Conversion coefficient

Method used

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  • Submicron-crystal-scale piezoelectric energy collecting material and preparation method thereof
  • Submicron-crystal-scale piezoelectric energy collecting material and preparation method thereof
  • Submicron-crystal-scale piezoelectric energy collecting material and preparation method thereof

Examples

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Embodiment 1

[0031] According to the chemical formula 0.2Pb(Zn 1 / 3 Nb 2 / 3 )O 3 –0.8Pb(Zr 1 / 2 Ti 1 / 2 )O 3 Weigh Pb 3 o 4 , ZnO, Nb 2 o 5 , ZrO 2 and TiO 2 , and ball milled in ethanol for 12h. After the mixture is dried, the dried powder is milled by high-energy ball for 90 minutes, and the powder obtained by high-energy ball mill is directly pressed at 800 MPa, and sintered at 850° C. for 2 hours to obtain ceramics.

Embodiment 2

[0033] According to the chemical formula 0.2Pb(Zn 1 / 3 Nb 2 / 3 )O 3 –0.8Pb(Zr 1 / 2 Ti 1 / 2 )O 3 Weigh Pb 3 o 4 , ZnO, Nb 2 o 5 , ZrO 2 and TiO2 , the sintering temperature is 900°C. Others are with embodiment 1.

Embodiment 3

[0035] According to the chemical formula 0.2Pb(Zn 1 / 3 Nb 2 / 3 )O 3 –0.8Pb(Zr 1 / 2 Ti 1 / 2 )O 3 Weigh Pb 3 o 4 , ZnO, Nb 2 o 5 , ZrO 2 and TiO 2 , The sintering temperature is 950°C. Others are with embodiment 1.

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Abstract

The invention relates to a submicron-crystal-scale piezoelectric energy collecting material and a preparation method thereof and belongs to the field of piezoelectric ceramic materials. The ceramic material has a matrix chemical composition of 0.2Pb(Zn1 / 3Nb2 / 3)O3-0.8Pb(Zr1 / 2Ti1 / 2)O3 and has a submicron-scale grain size. The ceramic material is prepared from Pb3O4, ZnO, Nb2O5, ZrO2 and TiO2, which serve as raw materials, through the steps of wet grinding, baking, high-energy ball milling, press forming and sintering. The ceramic material is applied to piezoelectric energy collecting devices, and waste vibration energy in surroundings can be effectively recycled while the miniaturization of the devices is achieved, so that the material has remarkable economic and social values.

Description

technical field [0001] The invention belongs to the field of piezoelectric ceramic materials, in particular to a piezoelectric ceramic material with submicron grain size, high voltage strain constant and low dielectric constant that can be applied to miniaturized piezoelectric energy harvesting devices and a preparation method thereof . Background technique [0002] In recent years, with the increasingly serious energy problem, how to recycle the discarded vibration energy in the environment has become the focus of research in various countries. Converting vibrational energy into usable electrical energy is undoubtedly the best choice, and piezoelectric energy harvesting devices based on the positive piezoelectric effect of piezoelectric materials can achieve this function. [0003] To meet the requirements of piezoelectric energy harvesting devices, piezoelectric ceramics must have high energy density: [0004] The energy density u can be expressed by the following formul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/626C04B41/88
CPCC04B35/49C04B35/62605C04B41/5116C04B41/88C04B2235/3251C04B2235/3284C04B2235/3296C04B2235/785C04B2235/96C04B41/4539C04B41/0072
Inventor 侯育冬岳云鸽郑木鹏晏晓东朱满康
Owner BEIJING UNIV OF TECH
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