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Bismuth scandate-lead titanate high-temperature piezoelectric ceramic material and preparation method thereof

A high-temperature piezoelectric and ceramic material technology, applied in the field of high-temperature piezoelectric ceramic materials, can solve problems such as the decrease of piezoelectric dielectric properties, the deviation of chemical dosage ratio, and the increase of sintering temperature, so as to reduce the sintering temperature, reduce the process cost, and improve performance effect

Inactive Publication Date: 2011-09-14
MORNSUN GUANGZHOU SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first object of the present invention is to provide a bismuth scandate-lead titanate high-temperature piezoelectric ceramic material, which solves the problem of the chemical dose ratio deviation caused by volatilization of bismuth in the sintering process of BSPT ceramics, which leads to the increase of ceramic sintering temperature and pressure. The problem of the decline in dielectric properties, which has a high Curie temperature and excellent piezoelectric properties, has practical application value in high-temperature electronic devices

Method used

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  • Bismuth scandate-lead titanate high-temperature piezoelectric ceramic material and preparation method thereof
  • Bismuth scandate-lead titanate high-temperature piezoelectric ceramic material and preparation method thereof
  • Bismuth scandate-lead titanate high-temperature piezoelectric ceramic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Purchasing industrially pure Sc from the market 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 As raw material, according to 0.363 BiScO 3 -0.637 PbTiO 3 The stoichiometric ratio, weighed Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 , and then weighed accounted for Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 and TiO 2 0.1% Bi by weight 2 o 3 , put it into a ball mill tank, add distilled water accounting for 50% of the total weight of the above raw materials, mix and grind for 2 hours on a planetary ball mill at a speed of 200 rpm; dry the ball milled mixture at 100°C Put it in a crucible, pre-fire at 740°C, and hold for 2 hours; add distilled water accounting for 50% of the total weight of the powder after pre-fired synthesis, and grind at 200 rpm for 4 hours; after grinding, add A suitable amount of binder material is placed in a mold and pressed into the required ceramic green sheet, wherein the binder is an aqueous solution of 5% by weight of PVA, and its consumption is 6% of...

Embodiment 2

[0039] The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material provided in this example is prepared according to the following method:

[0040] (1) Purchasing industrially pure Sc from the market 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 As raw material, according to 0.363 BiScO 3 -0.637PbTiO 3 The stoichiometric ratio, weighed Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 , and then weighed accounted for Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 and TiO 2 0.2% Bi by weight 2 o 3 , put in the ball mill tank, add distilled water, mix and ball mill; the amount of distilled water is Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 60% of the total weight of raw materials, the rotating speed during ball milling is 100 rpm, and the ball milling time is 2h;

[0041] (2) After drying the mixed material after ball milling, wherein, the drying temperature of the mixed material is 100°C, and after pre-burning at 740°C for 2 hours, distilled water is added again, and ...

Embodiment 3

[0048] The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material provided in this example is prepared according to the following method:

[0049] (1) Purchasing industrially pure Sc from the market 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 As raw material, according to 0.363 BiScO 3 -0.637PbTiO 3 The stoichiometric ratio, weighed Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 , and then weighed accounted for Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 and TiO 2 0.3% Bi by weight 2 o 3 , put in the ball mill jar, add distilled water, mix and ball mill, wherein the amount of distilled water is Sc 2 o 3 、 Bi 2 o 3 , Pb 3 o 4 、TiO 2 60% of the total weight of raw materials, the rotating speed during ball milling is 200 rpm, and the ball milling time is 2h;

[0050] (2) After the ball-milled mixture is dried, the drying temperature is 100°C. After pre-burning at 740°C for 2 hours, distilled water is added again, mixed and ball-milled. The amount of distill...

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Abstract

The invention discloses a bismuth scandate-lead titanate high-temperature piezoelectric ceramic material. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material comprises a matrix with the chemical formula of xBiScO3-(1-x)PbTiO3 and bismuth trioxide (Bi2O3) in an amount which is less than 0.4 percent of the total weight of the matrix. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material is prepared by adding excess Bi2O3 into raw materials of Sc2O3, Bi2O3, Pb3O4 and TiO2 in the metering ratio according to the chemical formula of xBiScO3-(1-x)PbTiO3, wherein x is 0.35 to 0.38; and the using amount of the excess Bi2O3 is 0.1 to 0.4 percent of the total weight of the raw materials of Sc2O3, Bi2O3, Pb3O4 and TiO2 in the metering ratio according to the chemical formula of xBiScO3-(1-x)PbTiO3. The bismuth scandate-lead titanate high-temperature piezoelectric ceramic material solves the problems that ceramic sintering temperature is increased and piezoelectric and dielectric properties are reduced due to deviation of a stoichiometric ratio caused by bismuth volatilization in the sintering process of BSPT ceramic, and has high Curie temperature, excellent piezoelectric property and an actual application value in high-temperature electronic equipment. The invention also discloses a preparation method for the bismuth scandate-lead titanate high-temperature piezoelectric ceramic material. In the preparation method, the piezoelectric ceramic material is prepared by synthesizing and sintering at lower temperature, so production cost is reduced, process steps are simplified, and the material has actual application value.

Description

technical field [0001] The invention belongs to the field of high-temperature piezoelectric ceramic materials, and in particular relates to a bismuth scandate-lead titanate high-temperature piezoelectric ceramic material and a preparation method thereof. Background technique [0002] High-temperature piezoelectric ceramics are widely used in many special fields such as aerospace, nuclear energy, metallurgy, petrochemical industry, and geological exploration. Such as: high-power ultrasonic devices used in industry, ultrasonic applications of high-temperature objects, measurement of vibration, acceleration and pressure of high-temperature objects, vibration sensors built in automobiles, dynamic fuel injection nozzles, etc. must use high-temperature piezoelectric materials. [0003] The high-temperature piezoelectric material system mainly includes lead-based piezoelectric ceramics represented by lead zirconate titanate, niobate-based lead-free piezoelectric ceramics, various b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/472C04B35/622
Inventor 何云斌刘珩尚勋忠周桃生柴荔英尹向阳胡健仁
Owner MORNSUN GUANGZHOU SCI & TECH
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