Ca2+ doped bismuth laminated piezoceramic material and preparation method thereof

A piezoelectric ceramic and bismuth layered technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc.

Inactive Publication Date: 2011-03-02
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no Ca-doped 2+ to SrBi 2 CaNbO 9 Report on the Effect of Piezoelectric Ceramic Materials on Properties and Structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The present invention uses CaCO 3 , SrCO 3 、 Bi 2 o 3 、 Ta 2 o 5 and Nb 2 o 5 As raw material, according to the stoichiometric formula Ca x Sr 1-x Bi 2 NbTaO 9 , calculate the quality of various raw materials by taking x=0.5, and then carry out the batching respectively, use alcohol as the ball milling medium, use the planetary ball mill to mill the materials for 12 hours, discharge and dry the materials, grind the mixed materials, and grind the obtained powder Under the pressure condition of 30MPa, it was dry-pressed into a tablet, and then sintered at 1000°C in the open and kept at a temperature of 5°C / min for 3 hours. The fired ceramic disc is parallel polished on both sides to a thickness of about 0.5 mm, cleaned with ultrasonic waves, coated with silver electrodes on both sides, and polarized by applying voltage in silicone oil. Polarization conditions are 80°C silicone oil, apply a voltage of 8kV / mm and maintain for 5 minutes. Prepare sample Ca when do...

Embodiment 2

[0018] The present invention uses CaCO 3 , SrCO 3 、 Bi 2 o 3 、 Ta 2 o 5 and Nb 2 o 5 As raw material, according to the stoichiometric formula Ca x Sr 1-x Bi 2 NbTaO 9 , calculate the quality of various raw materials by taking x=0.5, and then carry out the batching, use alcohol as the ball milling medium, and then use the planetary ball mill to ball mill the mixture for 12 hours, discharge and dry, grind the mixed raw materials, and grind the obtained powder Under the pressure condition of 30MPa, it is dry-pressed into a sheet, and then sintered at 1050°C in the open, and kept at a temperature of 5°C / min for 3 hours. The fired ceramic disc is parallel polished on both sides to a thickness of about 0.5 mm, cleaned with ultrasonic waves, coated with silver electrodes on both sides, and polarized by applying voltage in silicone oil. Polarization conditions are 80°C silicone oil, apply a voltage of 8kV / mm and maintain for 5 minutes. The measured properties are: piezoele...

Embodiment 3

[0020] The present invention uses CaCO 3 , SrCO 3 、 Bi 2 o 3 、 Ta 2 o 5 and Nb 2 o 5 As raw material, according to the stoichiometric formula Ca x Sr 1-x Bi 2 NbTaO 9 , according to take x=0.5 to calculate the quality of various raw materials, and then carry out the batching, use alcohol as the ball milling medium, use the planetary ball mill to ball mill and mix the materials for 12 hours, discharge and dry, grind the mixed raw materials, and grind the obtained powder to 30MPa Dry press into tablets under certain pressure conditions, and then sinter in the open at 1100°C, keep warm for 3 hours, and the heating rate is 5°C / min. The fired ceramic disc is parallel polished on both sides to a thickness of about 0.5 mm, cleaned with ultrasonic waves, coated with silver electrodes on both sides, and polarized by applying voltage in silicone oil. Polarization conditions are 80°C silicone oil, apply a voltage of 8kV / mm and maintain for 5 minutes. The measured properties a...

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PUM

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Abstract

The invention relates to a Ca2+ doped bismuth laminated piezoceramic material and a preparation method thereof, belonging to the field of piezoceramic material. The invention adopts SrBI2NbTaO9 system piezoceramic material as basal body, Ca is doped at Sr site in certain mol ratio (Ca / Sr is more than 0 and less than 1), solid phase synthesis process is utilized to carry out heat preservation sintering for 0.1-6h at the temperature of 1300 DEG C, thus obtaining the novel piezoceramic material, and composition thereof is CaxSr1-xBi2NbTaO9 (x is more than 0 and less than 1). The main properties of the material include: epsilon33T / epsilon 0 is 150 minus or plus 20, d33 is 20pC / N, the material can be used for preparing piezoceramic elements in various shapes, the material can be assembled into various piezoceramic sensors, and the material can be widely applied in measuring, detecting and automation under high temperature condition.

Description

technical field [0001] The present invention relates to a doped Ca 2+ The bismuth layered piezoelectric ceramic material and a preparation method thereof belong to the technical field of piezoelectric ceramic preparation. Background technique [0002] Piezoelectric ceramics are functional materials with piezoelectric effect that can convert mechanical energy and electrical energy into each other. With Pb(Zr,Ti)O 3 The representative lead-based piezoelectric ceramics have been widely used in the fields of electronics and microelectronics due to their excellent performance. harm. Therefore, with the demands of environmental protection and sustainable development of human society, the development of environmentally friendly lead-free piezoelectric ceramics has become an urgent strategic research topic. [0003] In recent years, countries have been mainly engaged in the research and development of the four lead-free systems of barium titanate, bismuth sodium titanate (BNT), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622H01L41/187
Inventor 闵鑫钱小龙房明浩黄朝晖刘艳改
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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