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A lead-free piezoelectric texture composite material applied to high power density energy harvesting devices and its preparation method and application

A high power density, energy harvesting technology, applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc., can solve the problem of low energy density and material energy of lead-free piezoelectric ceramics To solve problems such as limited improvement in collection performance, to achieve the effect of increasing power density

Active Publication Date: 2021-07-13
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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  • A lead-free piezoelectric texture composite material applied to high power density energy harvesting devices and its preparation method and application
  • A lead-free piezoelectric texture composite material applied to high power density energy harvesting devices and its preparation method and application
  • A lead-free piezoelectric texture composite material applied to high power density energy harvesting devices and its preparation method and application

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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

A lead-free piezoelectric texture composite material applied to high power density energy harvesting devices and its preparation method and application. The invention relates to a lead-free piezoelectric texture composite material and its preparation method and application. The invention aims to solve the problem that the energy density of the existing lead-free piezoelectric ceramics is low, and the improvement range of the energy collection performance of the material is very limited based on the concept of traditional solid solution or random doping. The general chemical formula of lead-free piezoelectric textured composites applied to high power density energy harvesting devices is (1‑x)(Ba 1‑y Ca y )(Ti 1‑z m z )O 3 / xBaTiO 3 . Method: 1. Preparation of fine-grained shell matrix powder; 2. Preparation of cast slurry; 3. Preparation of ceramic green body; 4. Preparation of textured composite ceramics; 5. Preparation of highly dense textured composite ceramics; 6. Preparation of high Performance textured composite ceramics. Application: Used as an environmentally friendly high power density miniaturized energy harvester.

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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Patent Type & Authority Patents(China)
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