Preparation method of lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding

A powder injection molding, lead lanthanum zirconate titanate technology, which is applied in the field of preparation of lead lanthanum zirconate titanate piezoelectric ceramics, can solve the problem that the strength of the ceramic injection blank is not very high, and can overcome the problems of low molding efficiency, high density, and the high cost effect
CN113045313AActive Publication Date: 2021-06-29CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU UNIV
Publication Date
2021-06-29

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Abstract

The invention belongs to the technical field of piezoelectric ceramic additive manufacturing, and particularly relates to a preparation method of a lead lanthanum zirconate titanate piezoelectric ceramic formed by thermocuring powder injection molding. The method comprises the following steps: modifying lead lanthanum zirconate titanate piezoelectric ceramic powder to obtain piezoelectric ceramic fine powder with excellent performance; carrying out ball-milling mixing on the modified ceramic fine powder, a bonding resin, a curing agent and a diluent under vacuum to obtain uniformly dispersed piezoelectric ceramic slurry with moderate viscosity; injecting the prepared ceramic slurry into a heated mold, and carrying out thermocuring molding to obtain a ceramic green body; and finally, degreasing, sintering, silvering and polarizing the ceramic green body to obtain the compact lead lanthanum zirconate titanate piezoelectric ceramic. According to the invention, the prepared ceramic slurry is uniform in particle dispersion and low in viscosity, and can be thermally cured in a mold after powder injection to form a component, the component is high in strength and easy to transfer and sinter, and a sintered sample is high in density and excellent in electrical property, and meets the use requirements of piezoelectric devices.
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Description

technical field

[0001] The invention belongs to the technical field of additive manufacturing of piezoelectric ceramics, and in particular relates to a preparation method of lead lanthanum zirconate titanate piezoelectric ceramics by injection molding of thermosetting powder. Background technique

[0002] Piezoelectric ceramics are the most widely used and most representative type of piezoelectric materials. Due to their special internal domain structure and the ability to convert electrical signals into mechanical signals, they are used to produce various types of piezoelectric materials. original. The most widely used piezoelectric ceramics are PLZT (lead lanthanum zirconate titanate) ceramics. PLZT piezoelectric ceramics have a high Curie temperature (380°C), easy doping modification, stable piezoelectric constant, Good quality factor, electromechanical coupling coefficient and high dielectric constant are of great significance in the field of piezoelectric sensing and d...

Claims

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