Lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material and preparation method thereof

A lead niobate stannate and high-temperature piezoelectric technology, which is applied in the field of high-temperature piezoelectric ceramic materials, can solve the problems of not investing in large-scale industrial production, expensive Sc elements, and reduced piezoelectric performance, so as to achieve convenient operation and excellent piezoelectric performance. Electrical performance and cost reduction effects

Active Publication Date: 2014-07-23
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of Sc elements, this material system has not been put into large-scale industrial production.
In recent years, people have introduced Co, In, Fe and other elements to replace Sc elements, although it can ensure a higher Curie temperature of piezoelectric materials, but it greatly reduces the piezoelectric performance.
In addition, the researchers also introduced LiNbO 3 , LiTaO 3 wait for ABO 3 Type tertiary to form a ternary system solid solution, although this method can ensure the excellent piezoelectric properties of piezoelectric materials, but it greatly reduces the Curie temperature

Method used

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  • Lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material and preparation method thereof
  • Lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material and preparation method thereof
  • Lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment provides a lead niobate stannate-bismuth scandate-lead titanate ternary high-temperature piezoelectric ceramic material, the composition of which is represented by the following formula:

[0038] 0.05Pb(Sn 1 / 3 Nb 2 / 3 )O 3 -0.35BiScO 3 -0.60PbTiO 3

[0039] where x takes a value of 0.60.

[0040] In this embodiment, the preparation method of lead niobate stannate-bismuth scandate-lead titanate ternary high-temperature piezoelectric ceramic material is as follows:

[0041] 1) Sc with an analytical purity of 99.9% 2 o 3 、 Bi 2 o 3 , Nb 2 o 5 , PbO, TiO 2 and SnO 2 As a raw material, according to the general formula 0.05Pb(Sn 1 / 3 Nb 2 / 3 )O 3 -0.35BiScO 3 -0.60PbTiO 3 The stoichiometric ratio for batching. Put the prepared raw materials into a ball mill tank, add absolute ethanol accounting for 60-80% of the total weight of the raw materials, and mill for 8-12 hours at a ball milling rate of 200-300r / min;

[0042] 2) Place the ball-milled mi...

Embodiment 2

[0048] This embodiment provides a lead niobate stannate-bismuth scandate-lead titanate ternary high-temperature piezoelectric ceramic material, the composition of which is represented by the following formula:

[0049] 0.05Pb(Sn 1 / 3 Nb 2 / 3 )O 3 -0.34 BiScO 3 -0.61PbTiO 3

[0050] Where x takes the value of 0.61. The preparation method of the high temperature piezoelectric ceramic material with this composition is the same as that of Example 1.

[0051] It is known through testing that the performance parameters of the high-temperature piezoelectric ceramic material prepared in this embodiment are as follows: d 33 =555pC / N,k p =0.589, tanδ=0.065, T c =408°C.

Embodiment 3

[0053] This embodiment provides a lead niobate stannate-bismuth scandate-lead titanate ternary high-temperature piezoelectric ceramic material, the composition of which is represented by the following formula:

[0054] 0.05Pb(Sn 1 / 3 Nb 2 / 3 )O 3 -0.33 BiScO 3 -0.62PbTiO 3

[0055] Where x takes the value of 0.62. The preparation method of the high temperature piezoelectric ceramic material with this composition is the same as that of Example 1.

[0056] It is known through testing that the performance parameters of the high-temperature piezoelectric ceramic material prepared in this embodiment are as follows: d 33 =470pC / N,k p =0.528, tanδ=0.039, T c =412°C.

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Abstract

The invention provides a lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material and a preparation method thereof. The structure of the material is as shown in the following general formula: 0.05Pb(Sn1 / 3Nb2 / 3)O3-(0.95-x)BiScO3-xPbTiO3, wherein x and 0.95-x respectively represent the mole percentages of PbTiO3 and BiScO3; x ranges from 0.60-0.63. The invention further provides a preparation method of the high temperature piezoceramic material. According to the lead tin niobate-bismuth scandate-lead titanate ternary system high temperature piezoceramic material provided by the invention, by changing the material system, the use amount of Sc is reduced compared with that of an existing piezoceramic material BiScO3-PbTiO3, the cost of industrial production is lowered, and under the condition that a relatively high Curie temperature is kept, the piezoelectric property of the material is further improved.

Description

technical field [0001] The invention relates to a lead niobate stannate-bismuth scandate-lead titanate ternary high-temperature piezoelectric ceramic material and a preparation method thereof, belonging to the field of high-temperature piezoelectric ceramic materials. Background technique [0002] In recent years, high-temperature piezoelectric materials have been widely used in high-tech fields such as aerospace, geological exploration, petrochemical industry, and automobile engines. . [0003] At present, the most widely used piezoelectric material is PZT piezoelectric material with perovskite structure (Note: PZT piezoelectric material is a polycrystalline material formed by sintering lead dioxide, lead zirconate, and lead titanate at 1200 °C ), but the Curie temperature of this type of piezoelectric material is generally below 390 °C. Due to the depolarization phenomenon of this kind of piezoelectric material, if the Curie temperature is above 390°C, it will irreversib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/472C04B35/50C04B35/622
Inventor 董蜀湘赵天龙王春明陈建国
Owner PEKING UNIV
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