Effects of porosity on dielectric and piezoelectric properties of porous lead zirconate titanate ceramics

Journal Article · Mon Apr 11 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3578196· OSTI ID:21518389

Ankun, Yang; Changan, Wang; Rui, Guo; Yong, Huang ^[1]

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1. Department of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084 (China)

We report porous lead zirconate titanate ceramics fabricated by tert-butyl alcohol-based gel-casting process which show a very high thickness electromechanical coupling coefficient (0.77), high hydrostatic figure of merit (9594x10{sup -15} m{sup 2}/N), and low acoustic impedance (3.7 Mrayls). We show that the porosity effectively affects the performance of the samples in two ways: (1) a higher porosity simplifies the resonance behavior, leading to more efficient energy transduction; (2) its replacement of active ceramic phase leads to low relative permittivity, high hydrostatic figure of merit, and low acoustic impedance. It was confirmed the properties could be tailored by controlling the porosity.

• OSTI ID: 21518389
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 15 Vol. 98; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALCOHOLS
BUTANOLS
CERAMICS
COLLOIDS
COUPLING
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
DIMENSIONS
DISPERSIONS
ELECTRICAL PROPERTIES
ELECTRICITY
GELS
HYDROSTATICS
HYDROXY COMPOUNDS
IMPEDANCE
LEAD COMPOUNDS
MATERIALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERMITTIVITY
PHYSICAL PROPERTIES
PIEZOELECTRICITY
POROSITY
POROUS MATERIALS
PZT
RESONANCE
THICKNESS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS