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Barium zirconate titanate-potassium sodium niobate piezoelectric ceramics and preparation method thereof

A technology based on potassium sodium niobate and barium zirconate titanate, applied in the field of electronic ceramics, can solve problems such as poor process performance of high-performance barium titanate ceramics, and achieve the effects of low production cost, simple process flow and low equipment requirements

Inactive Publication Date: 2010-11-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 object of the present invention is to provide a high-voltage barium zirconate titanate potassium niobate-based piezoelectric ceramic and its preparation method, using potassium niobate Sodium, barium zirconate and barium titanate are combined to form a solid solution, which greatly improves the piezoelectric performance and process performance

Method used

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  • Barium zirconate titanate-potassium sodium niobate piezoelectric ceramics and preparation method thereof
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  • Barium zirconate titanate-potassium sodium niobate piezoelectric ceramics and preparation method thereof

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Embodiment 1

[0021] The barium carbonate whose mass percentage content is 99.9%, the sodium carbonate whose mass percentage content is 99.8%, the potassium carbonate whose mass percentage content is 99.0%, the titanium dioxide whose mass percentage content is 99.0% and the Zirconium dioxide, niobium pentoxide with a mass percentage content of 99.5%, stoichiometric ratio is 0.74K 0.5 Na 0.5 NbO 3 -0.13BaTiO 3 -0.13BaZrO 3 Weigh ingredients. Put the prepared material into the ball mill and mix according to the ratio of zirconia ball: material 10:1, and do not add other media 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 900°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 di...

Embodiment 2

[0023] The barium carbonate whose mass percentage content is 99.9%, the sodium carbonate whose mass percentage content is 99.8%, the potassium carbonate whose mass percentage content is 99.0%, the titanium dioxide whose mass percentage content is 99.0% and the Zirconium dioxide, niobium pentoxide with a mass percentage content of 99.5%, 0.75K according to the stoichiometric ratio 0.5 Na 0.5 NbO 3 -0.15BaTiO 3 -0.10BaZrO 3Weigh 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 1000°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 350 rev / min; add the powder to its mass ratio of 30% pure water, mass ratio of 1.1% po...

Embodiment 3

[0025] The barium carbonate whose mass percentage content is 99.9%, the sodium carbonate whose mass percentage content is 99.8%, the potassium carbonate whose mass percentage content is 99.0%, the titanium dioxide whose mass percentage content is 99.0% and the Zirconium dioxide, niobium pentoxide with a mass percentage content of 99.5%, and a stoichiometric ratio of 0.74K 0.5 Na 0.5 NbO 3 -0.18BaTiO 3 -0.08BaZrO 3 Weigh ingredients. The prepared materials are put into a ball mill and mixed according to the mass ratio of zirconia balls:materials at a ratio of 8:1, and no other medium is added during the mixing process. The time of ball milling is 5 hours, and the rotating speed is 450 rev / min. The mixed material briquette is pre-fired at 1150°C for 2 hours, the calcined material is taken out and ground, and then passed through a 40-mesh sieve after ball milling for 5 hours. The ball milling speed is 450 rev / min; add the powder to its mass ratio of 40% pure water, mass rati...

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Abstract

The invention discloses barium zirconate titanate-potassium sodium niobate piezoelectric ceramics and a preparation method thereof. The general formula of the chemical composition of the barium zirconate titanate-potassium sodium niobate piezoelectric ceramics is (1-x-y) BaTiO3-xCaTiO3-yBaZrO3, wherein the x is more than 0 and less than 0.5, the y is more than 0 and less than 0.5, and the x and the y are both mole fractions. The preparation method comprises the following steps: dosing barium carbonate, calcium carbonate, titanium dioxide and zirconium dioxide by the stoichiometric ratio of the (1-x-y) BaTiO3-xCaTiO3-yBaZrO3, and then carrying out the procedures of ball milling, calcination, secondary ball milling, pelleting, moulding, glue discharging, high-temperature sintering and the like to finally prepare the calcium barium zirconate titanate piezoelectric ceramics with high piezoelectric performance. The method in the invention greatly improves the piezoelectric performance of lead-free piezoelectric ceramic systems and the process stability of materials and makes the lead-free piezoelectric ceramics of the barium titanate system achieve the practical level at two aspects of the components and the process.

Description

technical field [0001] The invention relates to a barium zirconate titanate-potassium sodium niobate-based piezoelectric ceramic with high-voltage electrical properties 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, Minglei Zhao, 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 the traditional solid-phase synthesis method to prepare high-performance lead-free piezoelectric ceramics, the p...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
Inventor 刘来君吴枚霞杨曌方亮胡长征
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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