Characterisation and electroacoustic modelling of porous piezoceramics with graded porosity for ultrasonic transducer applications

Abstract In this study, a characterisation method for graded porosity piezoceramic discs is presented. A sample with graded porosity from about 5 to about 40% along the thickness has been produced. Two homogeneous samples with respectively low and high porosity are used as references. Density measur...

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Bibliographic Details
Published inAdvances in applied ceramics Vol. 109; no. 3; pp. 184 - 188
Main Authors Fortineau, J, Tran-Huu-Hue, L P, Galassi, C, Capiani, C, Lethiecq, M
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 01.03.2010
SAGE Publications
Subjects
Electroacoustic modelling
Gradient
Piezoceramic
Porosity
Gradient
Electroacoustic modelling
Porosity
Piezoceramic
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Summary:Abstract In this study, a characterisation method for graded porosity piezoceramic discs is presented. A sample with graded porosity from about 5 to about 40% along the thickness has been produced. Two homogeneous samples with respectively low and high porosity are used as references. Density measurements have been performed in order to estimate the average porosity of samples. Using an equivalent circuit model including the mechanical and dielectric losses and a fitting technique, the electroacoustic properties of the constant porosity samples have been extracted. Then, based on a model of multilayer piezoceramics, the graded porosity sample properties are simulated assuming it is made of 10 layers stacked along the sample thickness.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1743-6753
1743-6761
DOI:10.1179/174367509X12502621261451