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Zirconium and molybdenum-doped bismuth layer-shaped leadless piezoelectric ceramic material and preparation method thereof

A lead-free piezoelectric and ceramic material technology, used in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc.

Active Publication Date: 2013-04-03
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] So far, there has been no substitution of zirconium and molybdenum atoms for SrBi 2 Ta 2 o 9 Report on Lead-free Piezoelectric Ceramics and Its Influence on Piezoelectric Properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The present invention uses SrCO 3 (analytically pure), Bi 2 o 3 (analytical pure), ZrO 2 (analytical pure), MoO 3 (analytical pure) and Ta 2 o 5 (Analytical pure) as raw material, take x=0.1, a=0.05 according to the stoichiometric formula. Then calculate the quality of each raw material and carry out the batching, use alcohol as the ball milling medium, use the planetary ball mill to mix the materials for 12 hours, discharge and dry, grind the mixed raw materials, and dry press the obtained powder under the pressure of 30MPa into tablets , and then sintered at 1000°C in the open, and kept warm for 3 hours to form porcelain, with a heating rate of 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 40°C silicone oil, apply a voltage of 4kV / mm and maintain for 5 minu...

Embodiment 2

[0018] The present invention uses SrCO 3 (analytically pure), Bi 2 o 3 (analytical pure), ZrO 2 (analytical pure), MoO 3 (analytical pure) and Ta 2 o 5 (Analytical pure) as raw material, take x=0.1, a=0.05 according to the stoichiometric formula. Then calculate the quality of each raw material and carry out the batching, use alcohol as the ball milling medium, use the planetary ball mill to mix the materials for 12 hours, discharge and dry, grind the mixed raw materials, and dry press the obtained powder under the pressure of 30MPa into tablets , and then sintered at 1050°C in the open, and kept warm for 3 hours to form porcelain, with a heating rate of 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 40°C silicone oil, apply a voltage of 4kV / mm and maintain for 5 minu...

Embodiment 3

[0021] The present invention uses SrCO 3 (analytically pure), Bi 2 o 3 (analytical pure), ZrO 2 (analytical pure), MoO 3 (analytical pure) and Ta 2 o 5 (Analytical pure) as raw material, take x=0.1, a=0.05 according to the stoichiometric formula. Then calculate the quality of each raw material and carry out the batching, use alcohol as the ball milling medium, use the planetary ball mill to mix the materials for 12 hours, discharge and dry, grind the mixed raw materials, and dry press the obtained powder under the pressure of 30MPa into tablets , and then sintered at 1100°C in the open, and kept warm for 3 hours to form porcelain, with a heating rate of 5°C / min. The fired ceramic disc is parallel polished on both sides to a thickness of about 0.5 mm, cleaned by ultrasonic waves, coated with silver electrodes on both sides, and polarized by applying voltage in silicone oil. Polarization conditions are 40°C silicone oil, apply a voltage of 4kV / mm and maintain for 5 minute...

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PUM

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Abstract

The invention relates to a zirconium and molybdenum-doped bismuth layer-shaped leadless piezoelectric ceramic material and a preparation method thereof, belonging to the field of piezoelectric ceramic materials. The novel piezoelectric ceramic material can be prepared by doping Zr and Mo at Ta position in a certain mol ratio according to a preparation method of a solid-phase process, with a SrBi2Ta2O9 system leadless piezoelectric ceramic material as a matrix. The formula of the leadless piezoelectric ceramic material is SrBi2(Zr0.5Mo0.5)xTa2-xO9, wherein x is not less than 0 and not more than 2. On the basis of SrBi2Ta2O9, the material improves the piezoelectric constant and reduces the dielectric constant. Meanwhile, the layer-shaped leadless piezoelectric ceramic material has the advantages of low electromechanical coupling coefficient, high mechanical quality factor and the like, can be used for preparing various piezoelectric ceramic elements, can be assembled into various piezoelectric sensors and has excellent performance.

Description

technical field [0001] The invention relates to a bismuth layered lead-free piezoelectric ceramic material doped with zirconium and molybdenum and a preparation method thereof, belonging to the technical field of piezoelectric ceramic preparation. Background technique [0002] In the field of piezoelectric ceramics, lead zirconate titanate (PZT) has dominated for a long time. However, lead zirconate titanate ceramics are lead-containing ceramics, in which lead oxide (or trilead tetroxide) accounts for about 70% of the total mass of raw materials. Lead-containing piezoelectric ferroelectric ceramics will bring harm to the environment and human beings during processing, sintering and use. Therefore, the development of lead-free environmentally compatible piezoelectric ceramic materials is an urgent and scientifically important topic. [0003] At present, the lead-free piezoelectric ceramic systems studied at home and abroad mainly include: barium titanate base, bismuth layer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/187C04B35/453C04B35/622H10N30/853
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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