Piezoelectric material and preparation method thereof, piezoelectric device and electronic equipment

By optimizing the composition and sintering process of the ternary piezoelectric material system of lead tungsten manganate-lead zinc niobate-lead zirconate titanate, the problem of heat generation of piezoelectric materials under high-frequency drive was solved, achieving efficient power conversion and improved stability, which is suitable for high-frequency piezoelectric devices and electronic equipment.

CN121990824APending Publication Date: 2026-05-08HUAWEI DEVICE CO LTD
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Patent Information

Application Number
CN202411586540.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-07
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Piezoelectric materials are prone to generating heat under ultrasonic strong AC electric field, which leads to problems such as frequency drift, material cracking and reduced service life, limiting their widespread use in high-frequency applications.

Method used

A ternary piezoelectric material consisting of lead tungsten manganate-lead niobate zincate-lead zirconate titanate is adopted. By doping lead tungsten manganate and rare earth element oxides, the material composition and sintering process are optimized to improve the mechanical quality factor and electromechanical coupling performance, and reduce dielectric loss and heat generation.

Benefits of technology

It effectively reduces the heat generation of piezoelectric materials, improves the efficiency of electrical energy conversion, and enhances the temperature stability and mechanical strength of the materials, making it suitable for high-frequency piezoelectric devices and electronic equipment.

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Abstract

The invention provides a piezoelectric material and a preparation method thereof, a piezoelectric device and electronic equipment, the chemical general formula of the piezoelectric material is xPb (Mn1 / 2W1 / 2) O3-(1-x) [0.15 Pb (Zn1 / 3Nb2 / 3) O3-0.85 Pb (Zr0. 5Ti0. 5) O3], and x is greater than or equal to 0.05 and less than or equal to 0.08. A solid-phase synthesis method is adopted, the mechanical quality factor, the electromechanical coupling coefficient, the piezoelectric constant, the dielectric loss, the Young modulus and the like of the prepared piezoelectric material are improved by doping lead tungstate manganate, regulating and controlling the parameter range of x and controlling the sintering temperature in the synthesis process and preferably adding rare earth elements Yb, Er, Eu and the like, the preparation process is simple, the raw materials are environmentally friendly, and the method is suitable for industrial production. When the piezoelectric material is applied to high-frequency piezoelectric devices and electronic equipment, the use requirements of high performance and low power consumption can be met.
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