A kind of barium, magnesium, tungsten replaces lead zirconate titanate a-position modified piezoelectric ceramics and preparation method thereof

A piezoelectric ceramic and lead zirconate titanate technology, which is applied in the field of piezoelectric ceramics, can solve the problems of low electromechanical coupling coefficient, provide piezoelectric ceramic formula and production method, and fail to meet the requirements of production and application, and achieve the improvement of piezoelectric performance. Effect

Active Publication Date: 2017-10-03
GUANGDONG JC TECHNOLOGICAL INNOVATION ELECTRONICS CO LTD
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Problems solved by technology

However, the former only explored the single variable Ba 2+ The impact on the performance of piezoelectric ceramics does not provide an optimized piezoelectric ceramic formula and production method based on the research results; although the latter provides an A-site replacement piezoelectric ceramic formula, its electromechanical coupling coefficient is very low and does not meet production applications Require

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  • A kind of barium, magnesium, tungsten replaces lead zirconate titanate a-position modified piezoelectric ceramics and preparation method thereof
  • A kind of barium, magnesium, tungsten replaces lead zirconate titanate a-position modified piezoelectric ceramics and preparation method thereof
  • A kind of barium, magnesium, tungsten replaces lead zirconate titanate a-position modified piezoelectric ceramics and preparation method thereof

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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] The present invention adopts (Ba X Mg Y W Z ) to modify pure PZT piezoelectric ceramics by compound substitution at A site to obtain barium, magnesium and tungsten compound substitution modified piezoelectric ceramics. Among them, barium (Ba 2+ ), magnesium (Mg 2+ ), tungsten (W 3+ ) After the metal ions enter the solid solution, because the valence state is the same as that of Pb 2+ Consistent, and the ionic radius is similar, will occupy Pb 2+ position, thereby creating cation vacancies (mainly lead vacancies) in the lattice. When lead vacancies appear in the unit cell, the crystal lattice is distorted, which is conducive to the domain wall movement, and the domain wall movement can be carried out under the action of...

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Abstract

The invention discloses a piezoelectric ceramic modified in the A position by replacing barium, magnesium and tungsten with lead zirconate titanate and a preparation method thereof, belonging to the field of piezoelectric ceramic materials. The lead composite substitute of the ceramic is: (BaX MgY W Z), the composition and stoichiometric ratio of the piezoelectric ceramic is: Pb1‑X‑Y‑Z BaX MgY WZ (Zr0.50Ti0.50)O3, wherein 0 < X ​​≤ 0.2, 0 < Y ≤ 0.1, 0 < Z ≤ 0.15, prepared through the steps of batching, synthesis, molding, plastic discharge, sintering, silver burning and polarization. The present invention uses (BaX MgY WZ) to carry out A-site compound substitution modification on pure PZT piezoelectric ceramics to obtain barium, magnesium, tungsten substituted lead zirconate titanate A-site modified piezoelectric ceramics, and the piezoelectric performance is significantly improved. The improvement meets the high requirements for the piezoelectric performance of piezoelectric ceramics for electronic devices such as micro piezoelectric pumps, piezoelectric motors, piezoelectric broadband filters, piezoelectric surface-mounted buzzers, and piezoelectric ceramic drivers.

Description

technical field [0001] The invention relates to piezoelectric ceramics, in particular to a piezoelectric ceramic modified at the A position of lead zirconate titanate substituted by barium, magnesium and tungsten and a preparation method thereof. Background technique [0002] Piezoelectric ceramics are made by high-temperature sintering. It is an emerging ceramic material with high dielectric constant, piezoelectricity and excellent electromechanical coupling performance, which can convert mechanical energy and electrical energy into each other. One of the most representative is lead zirconate titanate (PZT) piezoelectric ceramics. Due to its piezoelectric properties and various dielectric properties caused by piezoelectricity, PZT piezoelectric ceramics have been widely used in the fields of aerospace, electronics, computers, lasers, ultrasound and energy. [0003] With the continuous development of various industries, the piezoelectric performance requirements of PZT piez...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G7/06C04B35/491C04B35/622
Inventor 姜知水欧明文理
Owner GUANGDONG JC TECHNOLOGICAL INNOVATION ELECTRONICS CO LTD
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