Three-layer structure lead zirconate titanate ferroelectric ceramic material and preparation method thereof

A technology of lead zirconate titanate and ferroelectric ceramics, applied in the field of ferroelectric ceramic materials, can solve the problems of reducing the dielectric breakdown strength of materials, reducing material breakdown strength, increasing dielectric loss, etc., and achieving the electrical breakdown of dense ceramics Strength, optimized reliability and safety, effect of high electrical breakdown strength
CN103553601AActive Publication Date: 2014-02-05SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Publication Date
2014-02-05

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Abstract

The invention discloses a three-layer structure lead zirconate titanate ferroelectric ceramic material and a preparation method thereof. The three-layer structure lead zirconate titanate ferroelectric ceramic material is of a sandwich structure, wherein a core layer of the material is a porous lead zirconate titanate ceramic layer, and the porosity of the core layer is 5-30%; the upper surface and lower surface of the material are compact lead zirconate titanate ceramic layers. The preparation method comprises the following steps: (a) respectively preparing porous lead zirconate titanate ceramic powder and compact lead zirconate titanate ceramic powder; (b) adding the porous lead zirconate titanate ceramic powder to the middle layer of a mold divided into three layers of space by using membranes, adding the compact lead zirconate titanate ceramic powder to the upper surface and lower surface of the mold, removing the membranes, briquetting and demolding; (c) removing plastic, sintering, machining and carrying out silver electrode firing, thus obtaining the ceramic material. The ceramic material provided by the invention has the advantages of high electric breakdown strength, low loss property of compact ceramics and the shock resistance of porous ceramics, so that the reliability and safety of the ferroelectric ceramic material in a pulse power supply are optimized.
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Description

technical field

[0001] The invention relates to a three-layer structure lead zirconate titanate ferroelectric ceramic material and a preparation method thereof, belonging to the technical field of ferroelectric ceramic materials. Background technique

[0002] Neilson proposed in 1957 that if a polarized ferroelectric can be depolarized under the action of an external shock wave, then the ferroelectric can be used as a pulsed power source (Neilson F W., Effects of strong shocks in ferroelectric materials., Bull. Am. Phys. Soc., 2, 302 (1957).). For a polarized ferroelectric, the stored energy density ω = Pr 2 / (2ε 0 ε r ), where Pr is the remanent polarization of the ferroelectric, ε r is the specific permittivity, ε 0 is the air dielectric constant. The PZT ceramic components in the high zirconium region are located near the ferroelectric-antiferroelectric phase boundary, and can induce phase transition under the action of electric field, temperature and stress. Espec...

Claims

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