Bismuth ferrite-lead titanate-barium titanate ternary-system high-temperature piezoelectric ceramics and preparation method thereof

A ternary system, high-temperature piezoelectric technology, applied in the field of multi-system high-temperature piezoelectric materials and their preparation, can solve the problems of lowering the Curie temperature of BF-PT piezoelectric materials and limiting the application field of BF-PT piezoelectric materials, etc. Achieve the effect of obvious advantages in piezoelectric coefficient, high voltage constant and high voltage performance

Inactive Publication Date: 2017-06-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing studies have shown that the inherent defects of BF-PT materials can be greatly improved by element doping, and its piezoelectric properties can be improved. However, the Curie temperature of BF-PT piezoelectric materials modified by doping is greatly reduced.
In the process of pursuing high Curie temperature and piezoelectric performance, it was found that these two performance parameters have a trade-off with each other, which limits the application fields of BF-PT piezoelectric materials

Method used

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  • Bismuth ferrite-lead titanate-barium titanate ternary-system high-temperature piezoelectric ceramics and preparation method thereof
  • Bismuth ferrite-lead titanate-barium titanate ternary-system high-temperature piezoelectric ceramics and preparation method thereof
  • Bismuth ferrite-lead titanate-barium titanate ternary-system high-temperature piezoelectric ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]In this embodiment, a bismuth ferrite-lead titanate-barium titanate ternary system high-temperature piezoelectric ceramic has the following composition and mass mole fraction: 0.62BF-0.23PT-0.15BT, that is, BF-PT- The molar ratio of bismuth ferrite: lead titanate: barium titanate in the BT ternary system is 0.62:0.23:0.15. The components of this embodiment are selected using (1-x)BF-xPT-0.15BT, x=0.23, and the content of barium titanate in the third component is 15%.

[0040] The preparation method of bismuth ferrite-lead titanate-barium titanate ternary system high-temperature piezoelectric ceramics in this embodiment includes the following steps:

[0041] a. Synthesis of BF-PT-BT powder:

[0042] With pure Bi 2 o 3 , Fe 2 o 3 , PbO, TiO 2 、BaCO 3 and MnO 2 As a raw material, the above-mentioned raw materials are weighed according to the stoichiometric ratio required for the BF-PT-BT ternary system whose chemical formula is 0.62BF-0.23PT-0.15BT, that is, to cont...

Embodiment 2

[0063] This embodiment is basically the same as Embodiment 1, especially in that:

[0064] In this embodiment, a bismuth ferrite-lead titanate-barium titanate ternary system high-temperature piezoelectric ceramic has the following composition and mass mole fraction: 0.66BF-0.19PT-0.15BT, that is, BF-PT- The molar ratio of bismuth ferrite: lead titanate: barium titanate in the BT ternary system is 0.66:0.19:0.15. The components of this embodiment are selected using (1-x)BF-xPT-0.15BT, x=0.19, and the content of barium titanate in the third component is 15%.

[0065] The preparation method of bismuth ferrite-lead titanate-barium titanate ternary system high-temperature piezoelectric ceramics in this embodiment includes the following steps:

[0066] a. Synthesis of BF-PT-BT powder:

[0067] With pure Bi 2 o 3 , Fe 2 o 3 , PbO, TiO 2 、BaCO 3 and MnO 2 As a raw material, the above-mentioned raw materials are weighed according to the stoichiometric ratio required for the BF...

Embodiment 3

[0088] This embodiment is basically the same as the previous embodiment, and the special features are:

[0089] In this embodiment, a bismuth ferrite-lead titanate-barium titanate ternary system high-temperature piezoelectric ceramic has the following composition and mass mole fraction: 0.58BF-0.27PT-0.15BT, that is, BF-PT- The molar ratio of bismuth ferrite: lead titanate: barium titanate in the BT ternary system is 0.58:0.27:0.15. The components of this embodiment are selected using (1-x)BF-xPT-0.15BT, x=0.27, and the content of barium titanate in the third component is 15%.

[0090] The preparation method of bismuth ferrite-lead titanate-barium titanate ternary system high-temperature piezoelectric ceramics in this embodiment includes the following steps:

[0091] a. Synthesis of BF-PT-BT powder:

[0092] With pure Bi 2 o 3 , Fe 2 o 3 , PbO, TiO 2 、BaCO 3 and MnO 2 As a raw material, the above-mentioned raw materials are weighed according to the stoichiometric rati...

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Abstract

The invention discloses bismuth ferrite-lead titanate-barium titanate ternary-system high-temperature piezoelectric ceramics and a preparation method thereof. The BF-PT-BT high-temperature piezoelectric ceramics have the advantages that the BF-PT-BT high-temperature piezoelectric ceramics are prepared through a solid reaction process, so that insulation performance of a BF-PT material is improved remarkably through introduction of a third component BT into a BF-PT solid solution; a piezoelectric constant of the BF-PT-BT high-temperature piezoelectric ceramics is as high as 195 pC/N, the Curie temperature thereof is as high as 547 DEG C, and the piezoelectric performance thereof can be kept sable relatively at the temperature lower than 490 DEG C; the BF-PT-BT high-temperature piezoelectric ceramics are approximate to a piezoelectric material of a commercial bismuth layer structure in Curie temperature but are 4 times greater than that in piezoelectric coefficient.

Description

technical field [0001] The invention relates to a piezoelectric material and a preparation method thereof, in particular to a multi-system high-temperature piezoelectric material and a preparation method thereof, which are applied in the technical field of preparation of functional materials for sensors, drivers and transducers. Background technique [0002] Piezoelectric ceramics are widely used in many fields such as communications, home appliances, aviation, detection and computers. With the rapid development of science and technology, some special fields, such as aviation, automobile, petrochemical industry, etc., urgently need piezoelectric sensors, drivers and transducers that can work stably in high temperature environments. [0003] High-temperature piezoelectric materials are the core sensitive components of high-temperature piezoelectric devices. However, piezoelectric ceramic materials with excellent performance and high Curie temperature are still relatively rar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
CPCC04B35/26C04B35/622C04B2235/3215C04B2235/3234C04B2235/3267C04B2235/3296C04B2235/3298
Inventor 陈建国屠庭龙程晋荣韦建新蹇婕
Owner SHANGHAI UNIV
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