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High-temperature-resistant piezoelectric ceramic and preparation method thereof

A technology of piezoelectric ceramics and high temperature resistance, applied in the field of piezoelectric ceramics, can solve the problems of high comprehensive electrical properties and cannot meet the requirements of piezoelectric devices, and achieve the effects of high dielectric constant, low production cost and simple production process

Active Publication Date: 2016-06-01
GUIZHOU ZHENHUA HONGYUN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the defect that the piezoelectric ceramic materials in the prior art cannot obtain high service temperature while having high comprehensive electrical properties and cannot meet the service requirements of piezoelectric devices, the present invention aims to provide a high service temperature High temperature resistant piezoelectric ceramics with high piezoelectric constant, high electromechanical coupling coefficient and dielectric constant and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] will Pb 3 o 4 , ZrO 2 、TiO 2 、Ni 2 o 3 , Nb 2 o 5 , Sb 2 o 3 , MgO and Li 2 CO 3 By Pb(Zr 1 / 2 Ti 1 / 2 ) 0.85 (Ni 1 / 3 Nb 2 / 3 ) 0.10 (Sb 1 / 3 Nb 2 / 3 ) 0.015 (Mg 1 / 3 Nb 2 / 3 ) 0.035 o 3 Weigh the molar ratio of +0.1mol% Li, pour it into a vibration mill and vibrate for 6 hours to obtain a uniformly mixed powder; after sieving, pre-calcine at 950°C for 2 hours, and ball-mill the pre-calcined powder for 6-12 hours to make The average particle size is less than 2 μm, the powder: ball: water is about 1: (2~3): (0.5~1.5); the ball mill powder is dried and added with 10% binder (hydroxypropyl methylcellulose: poly Vinyl alcohol: alcohol: water = 1:1:0.5:5) granulation, extrusion molding after aging, punching, degluing, and sintering at a temperature of 1210°C for 2 hours to obtain a ceramic sheet; the two surfaces of the ceramic sheet Print the silver paste with the required diameter and thickness of 0.01mm on the screen, dry it in a tunnel furnace at 260-35...

Embodiment 2

[0022] will Pb 3 o 4 , ZrO 2 、TiO 2 、Ni 2 o 3 , Nb 2 o 5 , Sb 2 o 3 , MgO and Li 2 CO 3 By Pb(Zr 1 / 2 Ti 1 / 2 ) 0.87 (Ni 1 / 3 Nb 2 / 3 ) 0.08 (Sb 1 / 3 Nb 2 / 3 ) 0.015 (Mg 1 / 3 Nb 2 / 3 ) 0.035 o 3 Weigh the molar ratio of +0.1mol% Li, pour it into a vibration mill and vibrate for 6 hours to obtain a uniformly mixed powder; after sieving, pre-calcine at 950°C for 2 hours, and ball-mill the pre-calcined powder for 6-12 hours to make The average particle size is less than 2 μm, the powder: ball: water is about 1: (2~3): (0.5~1.5); the ball mill powder is dried and added with 10% binder (hydroxypropyl methylcellulose: poly Vinyl alcohol: alcohol: water = 1:1:0.5:5) granulation, extrusion molding after aging, punching, degluing, and sintering at a temperature of 1220°C for 2 hours to obtain a ceramic sheet; the two surfaces of the ceramic sheet Print the silver paste with the required diameter and thickness of 0.01mm on the screen, dry it in a tunnel furnace at 260-35...

Embodiment 3

[0024] will Pb 3 o 4 , ZrO 2 、TiO 2 、Ni 2 o 3 , Nb 2 o 5 , Sb 2 o 3 , MgO and Li 2 CO 3 By Pb(Zr 1 / 2 Ti 1 / 2 ) 0.90 (Ni 1 / 3 Nb 2 / 3 ) 0.03 (Sb 1 / 3 Nb 2 / 3 ) 0.02 (Mg 1 / 3 Nb 2 / 3 ) 0.05 o 3 +0.1mol% Ba molar ratio, weighed, poured into a vibrating mill and vibrated for 6 hours to obtain a uniformly mixed powder; after sieving, pre-calcined at 980°C for 2 hours, and ball-milled the pre-calcined powder for 6-12 hours to make The average particle size is less than 2 μm, the powder: ball: water is about 1: (2~3): (0.5~1.5); the ball mill powder is dried and added with 10% binder (hydroxypropyl methylcellulose: poly Vinyl alcohol: alcohol: water = 1:1:0.5:5) granulation, extrusion molding after aging, punching, degluing, and sintering at a temperature of 1230°C for 2 hours to obtain a ceramic sheet; the two surfaces of the ceramic sheet Print the silver paste with the required diameter and thickness of 0.01mm on the screen, dry it in a tunnel furnace at 260-350°C...

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Abstract

The invention relates to a high-temperature-resistant piezoelectric ceramic and a preparation method thereof. The structural general formula of the piezoelectric ceramic is Pb(Zr1 / 2Ti1 / 2)x(Ni1 / 3Nb2 / 3)y(Sb1 / 3Nb2 / 3)z(Mg1 / 3Nb2 / 3)1-x-y-zO3+wmo1%A, wherein x ranges from 0.85 to 0.97, y ranges from 0.01 to 0.10, z ranges from 0.01 to 0.05, w ranges from 0.05 to 2.0, and A is a modified element of alkali metal or alkaline-earth metal. The preparation method of the high-temperature-resistant piezoelectric ceramic comprises the following steps: pre-sintering; ball milling; drying; sieving; granulating, forming, punching, dumping and sintering; silver brushing, silver sintering and polarizing. The high-temperature-resistant piezoelectric ceramic provided by the invention solves the problems that existing piezoelectric ceramic is low in use temperature, and the electrical property cannot meet the requirements, can be used at the temperature of above 200 DEG C and has a high-voltage constant and a high-dielectric constant.

Description

technical field [0001] The invention relates to piezoelectric ceramics, in particular to high-temperature-resistant piezoelectric ceramics and a preparation method thereof, and belongs to the technical field of piezoelectric ceramic production. Background technique [0002] High-temperature piezoelectric ceramic materials are widely used in many scientific research and industrial sectors such as aerospace, nuclear energy, automobiles, petrochemicals, metallurgy, power generation, and geological exploration. In the past ten years, with the rapid development of science and technology, many electronic devices have higher and higher requirements for the selected piezoelectric devices, and the scope of application and adaptability to the environment require piezoelectric materials to have greater adaptability. The operating temperature of existing piezoelectric ceramics is generally -40°C~+120°C. Using piezoelectric ceramics to make buzzers will seriously deteriorate the performa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/493C04B35/622C04B35/634H01L41/187H01L41/43H10N30/097H10N30/853
CPCC04B35/493C04B35/622C04B35/63416C04B35/6365C04B2235/656C04B2235/3206C04B2235/3203C04B2235/3251C04B2235/3294H10N30/853H10N30/097
Inventor 褚涛吴康和张田才
Owner GUIZHOU ZHENHUA HONGYUN ELECTRONICS
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