Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Piezoelectric ceramics with relaxed nanowires and preparation method thereof

A technology of piezoelectric ceramics and nanowires, applied in the field of piezoelectric materials, can solve the problems of low power generation density, fragility, and low sensitivity, and achieve the effects of low raw material cost, sensitive piezoelectric response, and obvious performance improvement

Active Publication Date: 2019-05-03
浙江巨力宝纺织科技有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of low density, low sensitivity and brittleness of PbTiO3 piezoelectric ceramics prepared on a large scale at present, the present invention provides a piezoelectric ceramic with a relaxed nanowire, which is characterized by a piezoelectric ceramic with a perovskite structure. Relaxed ceramic nanowires are embedded in the electroceramic cake, which increases the array frequency and reduces the array loss. It has a sensitive piezoelectric response and is suitable for micro-vibration power generation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) BaTiO 3 Slurry preparation: BaCO 3 and TiO 2 Weigh it according to the molar ratio of 1:1, grind it into a slurry with an appropriate amount of water in a colloid mill, and the grinding quality is based on the particle size being less than 100nm;

[0031] (2) Preparation of piezoelectric ceramics with a perovskite structure: weigh lead oxide, titanium dioxide, and zirconium dioxide at a mass ratio of 2:1:1, mix them with deionized water, ball mill for 5 hours, and then dry them at a pressure of 35MPa Pressed into a pancake with a thickness of 1.5mm by a hydraulic press, and sintered at 900°C to obtain a piezoelectric ceramic cake with a perovskite structure;

[0032] (3) Piezoelectric ceramic cake cracking: Cool the piezoelectric ceramic cake obtained in step (2) to 150°C, and quench it with liquid nitrogen to rapidly crack the ceramic cake, and further crack on the basis of the original cracks to form uniform micro-cracks;

[0033] (4) Formation of relaxed nanow...

Embodiment 2

[0036] (1) BaTiO 3 Slurry preparation: BaCO 3 and TiO 2 Weigh it according to the molar ratio of 1:1, grind it into a slurry with an appropriate amount of water in a ball mill, and the grinding quality is based on the particle size being less than 100nm;

[0037] (2) Preparation of piezoelectric ceramics with a perovskite structure: weigh lead oxide, titanium dioxide, and zirconium dioxide at a mass ratio of 1:1:1, mix them with deionized water, ball mill for 3 hours, and then dry them at a pressure of 10MPa Pressed into a 2mm pancake body and sintered at 900°C to obtain a piezoelectric ceramic cake with a perovskite structure;

[0038] (3) Piezoelectric ceramic cake cracking: Cool the piezoelectric ceramic cake obtained in step (2) to 150°C, and quench it with liquid nitrogen to rapidly crack the ceramic cake, and further crack on the basis of the original cracks to form uniform micro-cracks;

[0039] (4) Formation of relaxed nanowires: immerse the piezoelectric ceramic cake...

Embodiment 3

[0042] (1) BaTiO 3 Slurry preparation: BaCO 3 and TiO 2 Weigh it according to the molar ratio of 1:1, grind it into a slurry with an appropriate amount of water in a jet mill, and the grinding quality is based on the particle size being less than 100nm;

[0043] (2) Preparation of piezoelectric ceramics with a perovskite structure: weigh lead oxide, titanium dioxide, and zirconium dioxide at a mass ratio of 2:1:1, mix them with deionized water, mill them for 4 hours, and then dry them at a pressure of 50 MPa Pressed into a 1mm pancake body and sintered at 950°C to obtain a piezoelectric ceramic cake with a perovskite structure;

[0044] (3) Piezoelectric ceramic cake cracking: Cool the piezoelectric ceramic cake obtained in step (2) to 200°C, and quench it with liquid nitrogen to rapidly crack the ceramic cake, and further crack the original crack to form uniform micro-cracks;

[0045] (4) Formation of relaxed nanowires: immerse the piezoelectric ceramic cake with uniform c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
piezoelectric charge coefficientaaaaaaaaaa
piezoelectric charge coefficientaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of a piezoelectric material, in particular to a piezoelectric ceramic with a relaxation type nanowire. The piezoelectric ceramic is characterized in that a relaxation type ceramic nanowire is embedded in a piezoelectric ceramic cake of a perovskite structure, so that the array frequency is improved; the array loss is reduced; the flexible piezoelectric response is realized; the piezoelectric ceramic is suitable for micro vibration electricity generation. Further, the invention relates to an advanced manufacturing method; by utilizing the characteristic that the piezoelectric ceramic of the perovskite structure has cracks in the sintering process, the cracks are further enlarged to be used as a template for forming the nanowire, so that BaTiO3 enters microcracks; the relaxation type nanowire is formed through crystalline grain growth along the cracks under the microwave condition. The cracks are repaired; in addition, the nanowire is formed; a better path is provided for large-scale preparation of high-response electricity generation materials.

Description

technical field [0001] The invention relates to a piezoelectric material, in particular to a piezoelectric ceramic with a relaxed nanowire, and further to an advanced manufacturing method. Background technique [0002] In recent years, people have been searching for new energy and renewable clean energy due to environmental problems. Therefore, the study of converting mechanical energy in the environment into electrical energy by using piezoelectric materials has received great attention. According to existing studies, experiments on piezoelectric materials have proved that piezoelectric materials can respond to various mechanical pressures and vibrations, thereby generating charges. This provides technical support for the application of piezoelectric materials in micromechanical energy generation. [0003] However, due to the limitations of material types, cost and performance, piezoelectric materials are mainly used in precision drive and sensing, microelectronics manufa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/87
CPCC04B41/009C04B41/5041C04B41/87C04B35/491C04B41/4539C04B41/0072
Inventor 陈庆曾军堂
Owner 浙江巨力宝纺织科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com