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Ga-modified (Bi0.8Gd0.2) FeO3-PbTiO3 piezoelectric ceramic and preparation method thereof

A BGGF-PT, feo3-pbtio3 technology, applied in the field of piezoelectric devices, can solve the problems of low breakdown voltage of BF-PT materials, unsatisfactory insulation, unfavorable application of process materials, etc., to improve high conductivity characteristics , low insulation and excellent physical properties

Inactive Publication Date: 2014-07-30
SHANGHAI UNIV
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Problems solved by technology

However, the quasi-isotype phase boundary of the BGF-PT system modified by Gd is very sensitive to the change of components, which will have a great impact on the performance, which is not conducive to the control of the process and the application of the material.
At the same time, it was found that the breakdown voltage of the BF-PT material modified by Gd is still low, and the insulation can not meet the requirements of piezoelectric devices selected by many electronic and electrical equipment.

Method used

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  • Ga-modified (Bi0.8Gd0.2) FeO3-PbTiO3 piezoelectric ceramic and preparation method thereof
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  • Ga-modified (Bi0.8Gd0.2) FeO3-PbTiO3 piezoelectric ceramic and preparation method thereof

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Embodiment

[0022] In this example, Ga modified (Bi 0.8 Gd 0.2 )FeO 3 -PbTiO 3 Piezoelectric ceramics, its chemical formula is: (Bi 0.8 Gd 0.2 ) (Fe 1-x Ga x )O 3 -PbTiO 3 , where x=0.03, 0.05 and 0.08. That is (Bi 0.8 Gd 0.2 )FeO 3 -PbTiO 3 The Ga element is introduced into the system to form a BGGF-PT piezoelectric ceramic solid solution system, and the chemical formula is (Bi 0.8 Gd 0.2 ) (Fe 0.97 Ga 0.03 )O 3 -PbTiO 3 , (Bi 0.8 Gd 0.2 ) (Fe 0.95 Ga 0.05 )O 3 -PbTiO 3 and (Bi 0.8 Gd 0.2 ) (Fe 0.92 Ga 0.08 )O 3 -PbTiO 3 The BGGF-PT piezoelectric ceramic material.

[0023] In this example, Ga modified (Bi 0.8 Gd 0.2 )FeO 3 -PbTiO 3 A method for preparing piezoelectric ceramics, comprising the steps of:

[0024] ① Preparation of BGGF-PT piezoelectric ceramic powder: Doping Ga element into (Bi 0.8 Gd 0.2 )FeO 3 -PbTiO 3 In the piezoelectric ceramic material system, a BGGF-PT piezoelectric ceramic solid solution system is formed, that is, the high-puri...

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Abstract

The invention discloses a Ga-modified (Bi0.8Gd0.2) FeO3-PbTiO3 (BGF-PT) piezoelectric ceramic. The piezoelectric ceramic has a chemical formula represented by (Bi0.8Gd0.2) (Fe1-xGax) O3-PbTiO3, wherein x is less than 0.1, namely Ga element is introduced into the BGF-PT system to form a BGGF-PT piezoelectric ceramic solid solution system. The invention also discloses a method for preparing the BGGF-PT piezoelectric ceramic. The preparation method comprises the steps of burdening the raw materials according to the chemical formula, carrying out ball milling, mixing, carrying out a calcining synthesis at a temperature range of 750 DEG C, carrying out ball milling and calcining synthesis repeatedly for many times to obtain fine and uniform BGF-PT powder, tabletting and sintering to obtain the ceramic product. According to the piezoelectric ceramic disclosed by the invention, the BGGF-PT piezoelectric ceramic, with the advantages of low lead content, large morphotropic phase boundary range, good insulativity, superior piezoelectric constant and high performance, is prepared by modifying the BGF-PT system piezoelectric ceramic material by adopting the Ga element.

Description

technical field [0001] The invention relates to a special functional ceramic material and a preparation method thereof, in particular to a piezoelectric ceramic and a preparation method thereof, which are applied in the technical field of piezoelectric devices used in electronic and electrical equipment. Background technique [0002] In recent years, with the rapid development of today's electronic information technology, many electronic and electrical equipment have put forward higher requirements for the performance parameters of the selected piezoelectric devices, such as miniaturization, functionalization, low cost, high power characteristics and high frequency stability. sex etc. This will inevitably require the material to have many advantages such as newer, faster, and better performance. At present, commercial piezoelectric ceramics are mostly concentrated in the PZT-based piezoelectric ceramic system. However, the main component of PZT-based piezoelectric ceramics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 程晋荣王大磊陈建国
Owner SHANGHAI UNIV
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