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Calcium barium zirconate titanate base piezoceramics and preparation method thereof

A technology of barium calcium zirconate titanate and electric ceramics, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of poor process performance of high-performance barium titanate ceramics, and achieve production Low cost, simple process flow, and enhanced piezoelectric performance

Inactive Publication Date: 2010-02-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems of poor process performance of high-performance barium titanate ceramics in the prior art, the present invention provides a high-voltage barium calcium zirconate titanate-based piezoelectric ceramic, which uses calcium titanate and barium zirconate and barium titanate to composite Form a solid solution, greatly improving its piezoelectric performance and process performance

Method used

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  • Calcium barium zirconate titanate base piezoceramics and preparation method thereof
  • Calcium barium zirconate titanate base piezoceramics and preparation method thereof
  • Calcium barium zirconate titanate base piezoceramics and preparation method thereof

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Embodiment 1

[0022] With the barium carbonate whose mass percentage content is 99.9%, the calcium carbonate that the mass percentage content is 99.8%, the titanium dioxide that the mass percentage content is 98.0%, and the zirconium dioxide that the mass percentage content is 99.0%, the stoichiometric ratio is 0.76 BaTiO 3 -0.12CaTiO 3 -0.12BaZrO 3 Weigh ingredients. The prepared materials are put into a ball mill and mixed according to the ratio of zirconia balls:materials at 10:1, and no other medium is added during the mixing process. The time of ball milling is 6 hours, and the rotating speed is 400 rpm. The mixed material briquette is pre-fired at 1250°C for 2 hours, the calcined material is taken out and ground, and then passed through a 40-mesh sieve after ball milling for 6 hours. The ball milling speed is 400 rev / min; add the powder to its mass ratio of 32% pure water, mass ratio of 1.2% polyacrylic acid ammonia dispersant and mass ratio of 0.8% polyvinyl alcohol binder, and mi...

Embodiment 2

[0024] The barium carbonate whose mass percentage content is 99.9%, the calcium carbonate whose mass percentage content is 99.8%, the titanium dioxide whose mass percentage content is 98.0%, and the zirconium dioxide whose mass percentage content is 99.0% are used to analyze the pure grade, and the stoichiometric ratio is 0.75 BaTiO 3 -0.15CaTiO 3 -0.1BaZrO 3 Weigh ingredients. The prepared materials are put into a ball mill and mixed according to the ratio of zirconia balls:materials at 15:1, and no other medium is added during the mixing process. The time of ball milling is 6 hours, and the rotating speed is 350 rpm. The mixed material briquette is pre-fired at 1250° C. for 2 hours. The calcined material is taken out and ground, and then ball milled for 6 hours and passed through a 40-mesh sieve. The ball milling speed is 350 rev / min; add the powder to the pure water with a mass ratio of 30%, the polyacrylic acid ammonia dispersant with a mass ratio of 1.1%, and the polyv...

Embodiment 3

[0026] It is 99.9% barium carbonate, 99.8% calcium carbonate, 98.0% titanium dioxide and 99.0% zirconia of 99.0% by mass, and the stoichiometric ratio is 0.74 BaTiO 3 -0.18CaTiO 3 -0.08BaZrO 3Weigh ingredients. The prepared materials are put into a ball mill and mixed according to the ratio of zirconia balls:materials at 8:1, and no other medium is added during the mixing process. The time of ball milling is 6 hours, and the rotating speed is 450 rpm. The mixed material briquette is pre-fired at 1250°C for 2 hours, the calcined material is taken out and ground, and then passed through a 40-mesh sieve after ball milling for 6 hours. The ball milling speed is 450 rpm; add the powder to its mass ratio of 40% pure water, mass ratio of 1% polyacrylic acid ammonia dispersant and mass ratio of 1% polyvinyl alcohol binder, and mix it evenly by ball milling for 2 hours to form a material Slurry, the ball milling speed is 80 rev / min, and air spray granulation is adopted; the powder ...

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Abstract

The invention discloses calcium barium zirconate titanate base piezoceramics and a preparation method thereof. The chemical formula of the calcium barium zirconate titanate base piezoceramics is (1-x-y)BaTiO3-xCaTiO3-yBaZrO3, wherein x is greater than 0 and smaller than 0.5, y is greater than 0 and smaller than 0.5, and both x and y are molar fractions. The preparation method comprises the following steps: mixing barium carbonate, calcium carbonate, titanium dioxide and zirconium dioxide according to the stoichiometric proportion (1-x-y)BaTiO3-xCaTiO3-yBaZrO3 (x is greater than 0 and smaller than 0.5, y is greater than 0 and smaller than 0.5, and both x and y are molar fractions), ball-milling, calcining, ball-milling for the second time, granulating, moulding, removing the binder, high-temperature sintering and the like so as to finally prepare the calcium barium zirconate titanate base piezoceramics with high piezoelectric performance. The method greatly enhances the piezoelectric performance of the lead-free piezoceramic system and the technical stability of the material, so that the lead-free piezoceramics in the barium titanate system achieve the practical level in the aspectsof components and technique.

Description

technical field [0001] The invention relates to a barium calcium zirconate titanate-based piezoelectric ceramic with high piezoelectric performance and a preparation method thereof, belonging to the field of electronic ceramics. Background technique [0002] Piezoelectric ceramics can generate strain under the action of an external electric field. At the same time, under the action of external force, piezoelectric ceramics will generate charges at the two poles, so they are widely used in transducers, micro-displacers, sensors, resonators and filters, etc. field. [0003] Literature "Shoufu Shao, Jialiang Zhang, Zong Zhang, Peng Zheng, MingleiZhao, Jichao Li and Chunlei Wang, High piezoelectric properties and domain configuration in BaTiO 3 ceramics obtained through the solid-state reaction route, J.Phys.D: Appl.Phys.41 (2008) 125408 "Using traditional solid-phase synthesis method to prepare high-performance lead-free piezoelectric ceramics, the piezoelectricity of barium t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622H01L41/187
Inventor 刘来君方亮杨曌胡长征周焕福
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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