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Barium calcium zirconate titanate BCZT piezoelectric ceramic and textural preparation method thereof

A technology of barium calcium zirconate titanate, piezoelectric ceramics, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problem of no obvious improvement in Curie temperature, and achieve good piezoelectricity Performance, high Curie temperature, effect of low piezoelectric constant

Active Publication Date: 2018-01-19
GUIZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through compound doping modification on the A-site and B-site of the BT base at the same time, although the obtained new formula has improved its piezoelectric performance, the Curie temperature has not been significantly improved, but is lower.

Method used

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  • Barium calcium zirconate titanate BCZT piezoelectric ceramic and textural preparation method thereof
  • Barium calcium zirconate titanate BCZT piezoelectric ceramic and textural preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: a kind of barium calcium zirconate titanate BCZT piezoelectric ceramics, is based on BaCO 3 and TiO 2 As the main raw material, CaCO 3 and ZrO 2 As a dopant, SrTiO 3 made for seed crystals, where BaCO 3 、TiO 2 , CaCO 3 and ZrO 2 The molar ratio is (Ba 0.85 Ca 0.15 ) (Zr 0.1 Ti 0.9 )O 3 , SrTiO 3 The mass percent content is 2.5%.

[0038] The above-mentioned textured preparation method of barium calcium zirconate titanate BCZT piezoelectric ceramics, the steps are as follows:

[0039] 1) BaCO 3 、TiO 2 , CaCO 3 , ZrO 2 and SrTiO 3 Dry separately to obtain product A;

[0040] 2) Mix product A and stir evenly to get product B:

[0041] 3) Make product B into a cast slurry, cast and extrude it on a cast machine to make a cast material with a thickness of 80 μm;

[0042] 4) The 6-layer casting material was made into a thickness of 1.2mm under a pressure of 20MPa using a static isostatic press, and cut into discs to obtain product C;

[0043...

Embodiment 2

[0045] Embodiment 2: a kind of barium calcium zirconate titanate BCZT piezoelectric ceramics, is based on BaCO 3 and TiO 2 As the main raw material, CaCO 3 and ZrO 2 As a dopant, SrTiO 3 made for seed crystals, where BaCO 3 、TiO 2 , CaCO 3 and ZrO 2 The molar ratio is (Ba 0.85 Ca 0.15 ) (Zr0.1 Ti 0.9 )O 3 , SrTiO 3 The mass percent content is 5%.

[0046] The above-mentioned textured preparation method of barium calcium zirconate titanate BCZT piezoelectric ceramics, the steps are as follows:

[0047] 1) BaCO 3 、TiO 2 , CaCO 3 , ZrO 2 and SrTiO 3 Dry separately to obtain product A;

[0048] 2) Mix product A and stir evenly to get product B:

[0049] 3) Make product B into a cast slurry, cast and extrude it on a cast machine to make a cast material with a thickness of 100 μm;

[0050] 4) The 3-layer casting material was made into 1mm thickness under 25MPa pressure with static isostatic press, and cut into discs to obtain product C;

[0051] 5) Put product C...

Embodiment 3

[0053] Embodiment 3: a kind of barium calcium zirconate titanate BCZT piezoelectric ceramics, is based on BaCO 3 and TiO 2 As the main raw material, CaCO 3 and ZrO 2 As a dopant, SrTiO 3 made for seed crystals, where BaCO 3 、TiO 2 , CaCO 3 and ZrO 2 The molar ratio is (Ba 0.85 Ca 0.15 ) (Zr 0.1 Ti 0.9 )O 3 , SrTiO 3 The mass percent content is 10%.

[0054] The above-mentioned textured preparation method of barium calcium zirconate titanate BCZT piezoelectric ceramics, the steps are as follows:

[0055] 1) BaCO 3 、TiO 2 , CaCO 3 , ZrO 2 and SrTiO 3 Dry separately to obtain product A;

[0056] 2) Mix product A and stir evenly to get product B:

[0057] 3) Make product B into casting slurry, cast and extrude it on a casting machine to make a casting material with a thickness of 120 μm;

[0058] 4) The 10-layer casting material was made into 0.8mm thickness under the pressure of 30MPa by a static isostatic press, and cut into discs to obtain product C;

[00...

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Abstract

The invention discloses a barium calcium zirconate titanate BCZT piezoelectric ceramic and a textural preparation method thereof. The barium calcium zirconate titanate BCZT piezoelectric ceramic is prepared from BaCO3 and TiO2 as main raw materials, CaCO3 and ZrO2 as doping agents and SrTiO3 as seed grain, wherein the mole ratio of BaCO3 to TiO2 to CaCO3 to ZrO2 is 2.5-10% of the mass percent of (Ba0.85Ca0.15) (Zr0.1Ti0.9)O3 and SrTiO3. The piezoelectric ceramic disclosed by the invention has the characteristics of excellent piezoelectric property, high Curie temperature and high piezoelectricconstant. The method disclosed by the invention is characterized by low sintering temperature.

Description

technical field [0001] The invention relates to a piezoelectric ceramic and a texturing preparation method thereof, in particular to a barium calcium zirconate titanate BCZT piezoelectric ceramic and a texturing preparation method thereof. Background technique [0002] Piezoelectric ceramic materials are widely used in various fields such as aerospace, medical treatment, and life art because of their performance of mutual conversion between mechanical energy and electrical energy. Lead-free piezoelectric ceramics are favored by the industry and researchers because they do not contain lead, do not pollute the environment, and meet the requirements of sustainable development of human society. Among them, the lead-free ceramic system based on barium titanate (BaTiO3, BT) has received extensive attention. Ren et al. successfully developed Ba(Zr0.2Ti0.8)O3-(Ba0.7Ca0.3 )TiO3 lead-free piezoelectric ceramic material, the piezoelectric constant of this system is up to 620PC / N. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622H01L41/187H10N30/853
CPCY02E60/36
Inventor 刘其斌薛安曾芳芳蔡恩培
Owner GUIZHOU UNIV
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