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Barium titanate based piezoelectric ceramic materials as well as preparation method and uses thereof

A technology of electric ceramics and barium titanate, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc. Low performance and other problems, to achieve the effect of promoting piezoelectric activity, reducing manufacturing costs, and easy control

Inactive Publication Date: 2008-05-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is mainly aimed at the lower piezoelectric performance of the barium titanate-based ceramic materials usually prepared by sintering the solid-state reaction process with common carbonates and oxides as initial raw materials, and the relatively specially synthesized barium titanate-based The barium titanate-based ceramic material produced by fine powder and special sintering method has the disadvantage of high cost and price, which is not conducive to practical application. A low-cost preparation of barium titanate-based ceramic material with excellent piezoelectric properties is provided. and a class of barium titanate-based ceramic materials with excellent piezoelectric properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Using ordinary titanium dioxide powder and barium carbonate powder as the initial raw materials, BaTiO with a main crystal structure of tetragonal phase and an average particle size of 0.5 μm was obtained after solid-state reaction in the pre-calcination process and mechanical ball milling 3 The raw material of fine powder is pure barium titanate ceramic material prepared under the condition of sintering temperature of 1180°C.

[0034] The specific preparation method is as follows. BaCO with a purity of 99.0% purchased in the chemical market was used respectively. 3 Powder and TiO with a purity of 99.8% 2 The powder was used as the initial raw material, and the ceramic samples were prepared by the traditional solid-state reaction process. First, the BaTiO 3 Stoichiometric ratio weighing BaCO 3 Powder and TiO 2 Powder raw material, put into nylon tank, use alcohol as medium, use Y-ZrO 2 The reinforced media balls were milled on a planetary ball mill for ...

Embodiment 2

[0035] Example 2: Pure barium titanate ceramic material prepared under the condition of sintering temperature of 1200°C. The specific preparation method is as described in Example 1, except that the sintering temperature during material preparation is 1200°C.

Embodiment 3

[0036] Example 3: Pure barium titanate ceramic material prepared under the condition of sintering temperature of 1210°C. The specific preparation method is as described in Example 1, except that the sintering temperature during material preparation is 1210°C.

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Abstract

The invention relates to a titanium acid barium based piezoelectric ceramic material which uses titanium dioxide and barium carbonate as initial raw materials to produce tetragonal barium carbonate based powder through milling and pre-sintering solid phase reaction. The particle average size of the powder is at submicron grade, and the crystal structure of the powder is tetragonal. Then the titanium acid barium based piezoelectric ceramic material is produced, which is provided with a microstructure, the average size of the middle grain particle diameter of which is 0.2-7.5 Mu m, and the piezoelectric performance index d33 value of which is larger than 225pC / N. the barium titanate based piezoelectric ceramic material of the invention has the characteristics of low production cost, large piezoelectric constant d33 value and high planar electromechanical coupling factor kp value, can be applied to various electronic components and devices of sensors, drivers, ultrasonic transducers, resonators, filters, buzzers, electronic igniters, etc. and can be used as lead-free piezoelectric ceramic to substitute lead bearing PZT piezoelectric ceramic material which is widely applied currently.

Description

technical field [0001] The invention relates to a barium titanate-based piezoelectric ceramic material and a preparation method and application thereof, belonging to the technical field of piezoelectric ceramic materials. technical background [0002] Currently Pb(Zr,Ti)O 3 Piezoelectric ceramic materials (referred to as PZT) are widely used in various electronic components and devices such as sensors, drivers, ultrasonic transducers, resonators, filters, buzzers, and electronic igniters due to their excellent piezoelectric properties. application. However, the preparation of PZT requires the use of a large amount of lead-containing oxides as raw materials, which will cause serious harm to humans and the ecological environment in the process of production, use and disposal. A subject of great practical significance. In terms of replacing PZT, people have done a lot of research attempts and efforts over the years, and have also achieved some very academically significant r...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622H01L41/187
Inventor 张家良邵守福
Owner SHANDONG UNIV
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