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High-performance barium zirconate titanate calcium-based leadless piezoelectric ceramics and preparation method thereof

A barium calcium zirconate titanate, lead-free piezoelectric technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve problems such as limiting practical applications

Inactive Publication Date: 2013-02-13
TIANJIN UNIV
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Problems solved by technology

However, the performance of these lead-free piezoelectric ceramics is far behind that of traditional PZT-based piezoelectric ceramics, which limits their practical applications.

Method used

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  • High-performance barium zirconate titanate calcium-based leadless piezoelectric ceramics and preparation method thereof
  • High-performance barium zirconate titanate calcium-based leadless piezoelectric ceramics and preparation method thereof
  • High-performance barium zirconate titanate calcium-based leadless piezoelectric ceramics and preparation method thereof

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Embodiment Construction

[0034] The specific preparation method of the high-performance barium calcium zirconate titanate-based lead-free piezoelectric ceramic of the present invention is as follows:

[0035] Using 99.0% BaCO of analytical purity 3 , 99.0% CaCO 3 , 98.5% TiO 2 , 99.0% ZrO 2 , 99.0% MnO 2 As the raw material, according to the stoichiometric ratio Ba 0.85 Ca 0.15 Zr 0.1-x mn x Ti 0.9 o 3 , where 0figure 1 These are the XRD patterns of the ceramics prepared in Examples 3-1, 3-2, and 3-3, and the prepared barium calcium zirconate titanate-based lead-free piezoelectric ceramics have a single perovskite structure. figure 2 The graphs show the variation of the dielectric constant of the ceramics prepared in Examples 3-1, 3-2, and 3-3 with temperature, and the curves gradually move to the low temperature direction as the doping amount increases. image 3 The piezoelectric constants of the ceramics prepared in Examples 3-1, 3-2, and 3-3 first increase and then decrease with the incr...

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Abstract

The invention discloses high-performance barium zirconate titanate calcium-based leadless piezoelectric ceramics and a preparation method thereof. The piezoelectric ceramics comprises the following raw constituents in mole percent: 0.85 percent of Ba, 0.15 percent of Ca, 0.1 to x percent of Zr, 0.9 percent of Mnxti and 3 percent of O, wherein x is larger than 0 and smaller than 0.1; and the barium zirconate titanate calcium-based leadless piezoelectric ceramics is obtained after blending, ball milling, presintering, secondary ball milling, granulating, forming and sintering. The piezoelectric property of the piezoelectric ceramics is optimal when the sintering is performed at 1450 DEG C and the doping amount of MnO2 is 0.5mol. percent, and when d33 is equal to 380pC / N, the piezoelectric property is excellent.

Description

technical field [0001] The invention belongs to a ceramic composition characterized by components, in particular to a lead-free barium calcium zirconate titanate piezoelectric ceramic with high voltage performance and a preparation method thereof. Background technique [0002] As an important functional material, piezoelectric ceramic materials are widely used in various fields of society and people's lives. The most widely used traditional piezoelectric ceramic materials are lead zirconate titanate Pb(Zr,Ti)O 3 (abbreviated as PZT)-based piezoelectric ceramics, which contain more than 60% lead, cause serious harm to humans and the ecological environment due to the existence of lead in the process of preparation, use, and disposal. As countries pay more and more attention to environmental protection , Therefore, the research and development of lead-free piezoelectric ceramics with excellent performance is far-reaching and urgent. [0003] Lead-free piezoelectric ceramics ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622H01L41/187H10N30/853
Inventor 冯雷孙涛李洋
Owner TIANJIN UNIV
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