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High Curie point and low lead piezoelectric ceramic material and preparation method thereof

A piezoelectric ceramic and high Curie point technology, which is applied in the field of high Curie point and low lead piezoelectric ceramic materials and its preparation, can solve the problems that the Curie point temperature is difficult to meet, environmental hazards, etc., to increase environmental coordination, reduce Content, the effect of expanding the scope of use

Active Publication Date: 2013-02-27
LIAONING SILICATE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of PZT ceramics requires a large amount of lead-containing oxides, and its production process and waste disposal stages have brought certain harm to the environment. With the development of science and technology, the Curie point temperature of PZT has been difficult to meet the aerospace requirements. , petrochemical metallurgy and other fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Synthesized at 1150°C for 3h in flux KCl / NaCl mixed molten salt to prepare flake SrTiO 3 crystals.

[0015] Take 235gBi 2 o 3 , 120gTiO 2 , 40.5gZnO, 245gPbO. Press Bi(Zn 1 / 2 Ti 1 / 2 )O 3 -PbTiO 3 The stoichiometric ratio is mixed together for pre-calcination at a temperature of 850°C to 1000°C, with an excess of 5% Bi and 10% excess Pb to compensate for the volatilization of Bi and Pb during sintering.

[0016] The prepared SrTiO 3 The template and BZT-PT powder are used as the powder for preparing casting slurry, adding 300-350g ethanol as solvent, 12-15g triolein as dispersant, 60-70g polyvinyl butyral as binder and 30-35g of dibutyl phthalate is used as a plasticizer. The prepared slurry is cast at 600μm and dried at 45°C for 12 hours to obtain a green body. The cast green body is cold isostatically pressed at 200MPa for 10 minutes, and discharged at 500°C for 24 hours. Sintering is then performed to obtain piezoelectric ceramics.

Embodiment 2

[0018] Synthesized at 1150°C for 3h in flux KCl / NaCl mixed molten salt to prepare flake SrTiO 3 crystals.

[0019] Take 188gBi 2 o 3 , 96gTiO 2 , 32.4gZnO, 196gPbO. Press Bi(Zn 1 / 2 Ti 1 / 2 )O 3 -PbTiO 3 The stoichiometric ratio is mixed together for pre-calcination at a temperature of 850°C to 1000°C, with an excess of 5% Bi and 10% excess Pb to compensate for the volatilization of Bi and Pb during sintering.

[0020] The prepared SrTiO 3 The template and BZT-PT powder are used as the powder for preparing the casting slurry, and 200g-300g of ethanol and methyl ethyl ketone mixed solvent are added as the solvent, and the ratio is 2:1. 8-12g triolein is used as the dispersant, 50- 60g of polyvinyl butyral as a binder and 20-30g of dibutyl phthalate and polyethylene glycol mixture as a plasticizer, the prepared slurry is cast at 500 μm and dried at 45°C for 12 hours to obtain a green body , cold isostatically pressing the cast green body at 200MPa for 10min, and then sin...

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Abstract

The invention relates to a high Curie point and low lead piezoelectric (PZT) ceramic material and a preparation method thereof, belonging to the technical field of the applications of the function ceramic. Bi is used to perform displacement modification on the PZT ceramic and a template grain growth method (TGG) is adopted to prepare the low lead PZT ceramic of which Curie temperature is improved. The chemical formula of the PZT ceramic is Bi(Zn1 / 2Ti1 / 2)O3-PbTiO3. The PZT ceramic can be widely used in numerous important scientific research and industrial departments such as aerospace, petrochemical engineering, metallurgy and geological exploration and in the high temperature accelerometer, the high temperature sensor, the vortex shedding flowmeter, the piezoelectric device of the bolt hole cold expanding technology and the like. The invention has the following effects: as Bi is used to replace partial Pb in the preparation process, the content of Pb in ceramic can be effectively reduced, the environmental coordination of the PZT ceramic can be increased, the Curie temperature of the material can be increased and the application range can be expanded.

Description

technical field [0001] The invention relates to a piezoelectric ceramic material with high Curie point and low lead and a preparation method thereof, belonging to the technical field of functional ceramic applications. Background technique [0002] Pb(Zr,Ti)O 3 Base ceramics (PZT) belong to ABO 3 type perovskite structure material, which has excellent piezoelectric properties, high Curie temperature, strong piezoelectricity, and good stability. Delay lines and other fields have a wide range of applications. However, the preparation of PZT ceramics requires a large amount of lead-containing oxides, and its production process and waste disposal stages have brought certain harm to the environment. With the development of science and technology, the Curie point temperature of PZT has been difficult to meet the aerospace requirements. , petrochemical metallurgy and other fields. Especially the requirements of high-temperature accelerometers, high-temperature sensors, vortex f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/472C04B35/622
Inventor 王野韩绍娟钟玲薛健张明张帆
Owner LIAONING SILICATE RES INST
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