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Piezoceramic material and preparation method thereof

A piezoelectric ceramic and auxiliary component technology, which is applied in the field of piezoelectric ceramic materials and their preparation, can solve the problem that piezoelectric ceramics cannot have high electromechanical coupling coefficient and high frequency temperature stability at the same time, and is beneficial to practical, Solving the effect of temperature stability and high electromechanical coupling coefficient

Inactive Publication Date: 2013-05-01
AAC ACOUSTIC TECH (SHENZHEN) CO LTD +1
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Problems solved by technology

[0005] The technical problem mainly solved by the present invention is that the existing piezoelectric ceramics cannot have high electromechanical coupling coefficient and high frequency temperature stability at the same time

Method used

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  • Piezoceramic material and preparation method thereof

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Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] The piezoelectric ceramic material disclosed in the embodiments of the present invention is a composite oxide containing at least lead, zirconium, and titanium, and is doped with a niobium-manganese phase and some oxides, and has a high electromechanical coupling coefficient and high temperature stability. Described as follows.

[0025] The embodiment of the present invention discloses a piezoelectric ceramic material, the piezoelectric ceramic material comprises a main component and an auxiliary component, and the expre...

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Abstract

The invention provides piezoelectric ceramic which comprises a main component and an auxiliary component, wherein an expression of the main component is shown as follows: Pba(Mn1 / 3Nb2 / 3)bZrxTiyO3; a is greater than or equal to 0.95 and less than or equal to 1.05; b is greater than or equal to 0.05 and less than or equal to 0.2; b plus x plus y is equal to 1; and the auxiliary component comprises at least one of oxide or salt of W, Cu, Ba, Si and Mn. The invention also discloses a preparation method of the piezoelectric ceramic. Compared with the prior art, the piezoelectric ceramic prepared by the preparation method has a high electromechanical coupling factor, and the temperature stability can be improved. In addition, as the auxiliary component containing a fluxing agent is added to the piezoelectric ceramic, on the premise that the performance and the temperature stability are guaranteed, a sintering temperature range is extended, and low temperature sintering and the practicability of a piezoelectric material are facilitated.

Description

Technical field [0001] The invention relates to a piezoelectric ceramic material and a preparation method thereof, in particular to a piezoelectric ceramic material with high electromechanical coupling coefficient and high temperature stability and a preparation method thereof. Background technique [0002] Piezoelectric ceramics have important applications in many aspects of people's lives. However, the piezoelectric ceramic materials currently used in large quantities in the world are still traditional lead-containing piezoelectric ceramics, and the lead content is as high as 60%. [0003] Lead oxide (PbO) is a volatile toxic substance that will cause damage to humans and the ecological environment during production, preparation, use, and disposal. With the increasing awareness of environmental protection, the international community is actively banning lead-containing electronic products through laws, regulations, and government directives. The volatilization of PbO during high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/493C04B35/622
Inventor 苏绍华吴仲谋
Owner AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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