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Lead-free piezoelectric texture composite material applied in high-power-density energy collection device and preparation method and application thereof

A technology with high power density and energy harvesting, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. Solve the problems of low energy density of electric ceramics, and achieve the effect of significant electromechanical conversion anisotropy and dielectric constant suppression

Active Publication Date: 2019-03-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims to solve the problem that the energy density of existing lead-free piezoelectric ceramics is low, and based on the concept of traditional solid solution or random doping, the energy harvesting performance of the material is very limited, and provides a high power density energy harvesting device. Lead-free piezoelectric texture composite material and its preparation method and application

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  • Lead-free piezoelectric texture composite material applied in high-power-density energy collection device and preparation method and application thereof
  • Lead-free piezoelectric texture composite material applied in high-power-density energy collection device and preparation method and application thereof
  • Lead-free piezoelectric texture composite material applied in high-power-density energy collection device and preparation method and application thereof

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specific Embodiment approach 1

[0040] Specific implementation mode one: combine figure 1 This embodiment is specifically described. The general chemical formula of the lead-free piezoelectric texture composite material applied to high power density energy harvesting devices in this embodiment is (1-x)(Ba 1-y Ca y )(Ti 1-z m z )O 3 / xBaTiO 3 , where M is Sn or Hf, 0.01≤x≤0.20, 0.01≤y≤0.12, 0.01≤z≤0.15;

[0041] The lead-free piezoelectric texture composite material applied to high power density energy harvesting devices is developed along [001] c Composition of oriented grains with preferred orientation; the grain size of the oriented grains is 5 μm to 50 μm; the oriented grains have a core-shell structure, and the core is BaTiO with a tetragonal phase (T) structure and a sheet-like morphology 3 , the shell is a (Ba 1-y Ca y )(Ti 1-z m z )O 3 , where M is Sn or Hf, 0.01≤y≤0.12, 0.01≤z≤0.15;

[0042] The lead-free piezoelectric texture composite material applied to high power density energy harves...

specific Embodiment approach 2

[0043] Specific implementation mode two: combination figure 2 Describe this embodiment in detail. In this embodiment, a method for preparing a lead-free piezoelectric textured composite material applied to high power density energy harvesting devices is completed according to the following steps:

[0044] 1. Preparation of fine crystal shell matrix powder:

[0045] According to the general chemical formula (Ba 1-y Ca y )(Ti 1-z m z )O 3 The stoichiometric ratio weighs the powder, when M is Sn, weighs BaCO 3 Powder, CaCO 3 Powder, TiO 2 Powder and SnO 2 Powder, when M is Hf, weigh BaCO 3 Powder, CaCO 3 Powder, TiO 2 Powder and HfO 2 powder, and then put the weighed powder in a ball milling tank, add absolute ethanol as a ball milling medium, use a planetary ball mill to mill for 12h to 120h, dry after ball milling, and grind evenly to obtain fine-grained raw materials, fine-grained raw materials Put it in a corundum crucible, under the condition of temperature of ...

specific Embodiment approach 3

[0061] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the TiO described in step one 2 The particle size of the powder is ≤100nm; the SnO described in step 1 2 The particle size of the powder is ≤100nm; the HfO described in step 1 2 The particle size of the powder is ≤100nm. Others are the same as in the second embodiment.

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Abstract

The invention relates to a lead-free piezoelectric texture composite material applied in a high-power-density energy collection device and a preparation method and application thereof. The problem that improving amplitude of energy collection performance of a material is very limited on the basis of conventional solid solution or random doping concept due to the fact that existing lead-free piezoelectric ceramic is low in energy density is solved. A chemical general formula of the lead-free piezoelectric texture composite material is (1-x)(Ba1-yCay)(Ti1-zMz)O3 / xBaTiO3. The preparation method includes: 1, preparing fine grain shell matrix powder; 2, preparing casting slurry; 3, preparing ceramic biscuit; 4, preparing texture composite ceramic; 5, preparing highly-compact texture composite ceramic; 6, preparing high-performance texture composite ceramic. The application of the composite material refers to using the composite material in an environment-friendly high-power-density mini energy collector.

Description

technical field [0001] The invention relates to a lead-free piezoelectric textured composite material and a preparation method and application thereof. Background technique [0002] In recent years, with the improvement of complex digital system integration technology and microelectronics technology, the Internet of Things technology, mobile electronics and wearable devices have developed rapidly, and their application scope has gradually covered health monitoring, climate monitoring, wild animal tracking, Embedded systems and military security and many other fields. However, the development of power supply devices for these microelectronic devices is relatively lagging behind, and chemical batteries are usually used to provide electrical energy for them. Due to the disadvantages of large size, short life, poor temperature stability and need to be replaced, chemical batteries have become a bottleneck restricting the development of microelectronic devices, especially for wir...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B41/88H02N2/18
CPCC04B35/4682C04B41/009C04B41/5116C04B41/88C04B2235/3244C04B2235/3267C04B2235/3281C04B2235/3284C04B2235/3293C04B2235/3298C04B2235/442C04B2235/786C04B2235/9669H02N2/186C04B41/4539
Inventor 常云飞孙媛刘迎春吴杰杨彬曹文武
Owner HARBIN INST OF TECH
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