Ternary nano leadless piezoelectric ceramic material, and preparation method thereof

A ceramic material, lead-free piezoelectric technology, applied in the field of piezoelectric ceramic materials, can solve the problems of poor density of ceramic powder, low piezoelectric activity of product powder, low purity of ceramic powder, etc., to avoid Difficult polarization, excellent piezoelectric dielectric properties, and good compactness

Inactive Publication Date: 2014-07-02
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The ceramic powder prepared by this method has large particle size, wide particle size distribution, and uneven composition, resulting in low piezoelectric activity of the product powder
[0006] 2. The grinding process is easy to introduce impurities, and the prepared ceramic powder has low purity
[0007]Third, the sintering temperature required for the ceramic powder prepared by the traditional method is relatively high, it is not easy to sinter, and the density of the ceramic powder after sintering is not very good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Press (1-x) Bi 0.5 Na 0.5 TiO 3 -xBi 0.5 Na 0.5 NbO 3 +y Li proportioning, wherein x=0.4, y=0.006, weigh Ti(OC 4 h 9 ) 4 , Bi(NO 3 ) 3 ·5H 2 O, Nb 2 o 5 、CH 3 COOLi·2H 2 O, CH 3 COONa·3H 2 O and ethylene glycol ether;

[0026] (2) Bi(NO 3 ) 3 ·5H 2 O, CH 3 COONa·3H 2 O and CH 3 COOLi·2H 2 O was dissolved in an appropriate amount of glacial acetic acid, and then Ti(OC 4 h 9 ) 4 and a small amount of ethylene glycol ether, stirred at 60°C until the solution forms a uniform transparent sol;

[0027] (3) Nb 2 o 5 Slowly add the powder into the above sol, and continue to stir at 60°C to form a uniformly dispersed colloidal mixture;

[0028] (4) Let the above mixed solution stand for 12 hours, and after the colloid is fully matured, transfer it to a vacuum oven to dry at 100°C;

[0029] (5) heat-treat the dried product in a muffle furnace at 700°C for 2 hours, then take it out and grind it into powder;

[0030] (6) Use a powder tablet press ...

Embodiment 2

[0033] (1) Press (1-x) Bi 0.5 Na 0.5 TiO 3 -xBi0.5 Na 0.5 NbO 3 +y Mn proportioning, wherein x=0.4, y=0.004, weigh Ti(OC 4 h 9 ) 4 , Bi(NO 3 ) 3 ·5H 2 O, Nb 2 o 5 , Mn(CH 3 COO) 2 ·3H 2 O, CH 3 COONa·3H 2 O and ethylene glycol ether;

[0034] (2) Bi(NO 3 ) 3 ·5H 2 O, CH 3 COONa·3H 2 O and Mn(CH 3 COO) 2 ·3H 2 O was dissolved in an appropriate amount of glacial acetic acid, and then Ti(OC 4 h 9 ) 4 and a small amount of ethylene glycol ether, stirred at 60°C until the solution forms a uniform transparent sol;

[0035] (3) Nb 2 o 5 Slowly add the powder into the above sol, and continue to stir at 60°C to form a uniformly dispersed colloidal mixture;

[0036] (4) Let the above mixed solution stand for 12 hours, and after the colloid is fully matured, transfer it to a vacuum oven to dry at 100°C;

[0037] (5) heat-treat the dried product in a muffle furnace at 600°C for 2 hours, then take it out and grind it into powder;

[0038] (6) Use a powder ta...

Embodiment 3

[0041] (1)(1-x)Bi 0.5 Na 0.5 TiO 3 -xBi 0.5 Na 0.5 NbO 3 +y Zr proportioning, wherein x=0.6, y=0.008, weigh Ti(OC 4 h 9 ) 4 , Bi(NO 3 ) 3 ·5H 2 O, Nb 2 o 5 , Zr(NO 3 ) 4 ·5H 2 O, CH 3 COONa·3H 2 O and ethylene glycol ether;

[0042] (2) Bi(NO 3 ) 3 ·5H 2 O, CH 3 COONa·3H 2 O and Zr(NO 3 ) 4 ·5H 2 O was dissolved in an appropriate amount of glacial acetic acid, and then Ti(OC 4 h 9 ) 4 and a small amount of ethylene glycol ether, stirred at 60°C until the solution forms a uniform transparent sol;

[0043] (3) Nb 2 o 5 Slowly add the powder into the above sol, and continue to stir at 60°C to form a uniformly dispersed colloidal mixture;

[0044] (4) Let the above mixed solution stand for 12 hours, and after the colloid is fully matured, transfer it to a vacuum oven to dry at 100°C;

[0045] (5) heat-treat the dried product in a muffle furnace at 750°C for 2 hours, then take it out and grind it into powder;

[0046] (6) Use a powder tablet press t...

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Abstract

The invention provides a ternary nano leadless piezoelectric ceramic material. General chemical formula of the ternary nano leadless piezoelectric ceramic material is (1-x)Na<0.5>Bi<0.5>TiO<3>-xNa<0.5>Bi<0.5>NbO<3>+yM, wherein M is used for representing a metallic element, x and y are used for representing mass contents, and 0<x<1, 0.0005<y<0.01. The invention also provides a method used for preparing the ternary nano leadless piezoelectric ceramic material via sol-gel method. Compared with existing technology, the ternary nano leadless piezoelectric ceramic material prepared via the method is small in particle size, narrow in particle size distribution range, uniform in composition, and high in piezoelectric activity; induction of impurities is difficult to happen in grinding processes; purity is high; sintering temperature is low; energy is saved; and compactness of ceramic powder after sintering is excellent. The preparation method is simple; processes are stable; industrialized degree is high; economic benefits are excellent; and application value is high.

Description

【Technical field】 [0001] The invention relates to the field of piezoelectric ceramic materials, in particular to a ternary system nano-lead-free piezoelectric ceramic material and a preparation method thereof. 【Background technique】 [0002] Piezoelectric ceramics are a class of important functional materials that realize the mutual conversion of mechanical energy and electrical energy, and are widely used in the fields of electronic technology, medical equipment, measurement and detection, communication, navigation and sensing technology. Traditionally used piezoelectric ceramics are mostly lead zirconate titanate (PZT) or PZT-based materials. Although they have good dielectric and piezoelectric properties, the lead oxide content of this PZT ceramic material is as high as 60%. However, lead oxide is a toxic substance that is volatile at high temperature. It will cause environmental pollution and directly endanger human health during the preparation, use and disposal of lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/475C04B35/495C04B35/622
Inventor 刘方徐丽华何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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