Mechanical Stresses and Giant Piezoresponse of the Surface of Textured K2Sr4Nb10O30 Ceramics

Crystallographic characteristics of K 2 Sr 4 Nb 10 O 30 ceramics have been compared to experimental data on the surface piezoresponse studied by method of scanning probe microscopy, which was used to estimate relative values of d 33 piezomodulus. Depending on the orientation of a ceramic sample surf...

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Bibliographic Details
Published inTechnical physics letters Vol. 45; no. 8; pp. 843 - 846
Main Authors Bunin, M. A., Bunina, O. A., Kuprina, Yu. A., Zav’yalov, V. P.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.08.2019
Springer Nature B.V
Subjects
Ceramics
Classical and Continuum Physics
Crystallography
Deformation mechanisms
Hot pressing
Microscopes
Physics
Physics and Astronomy
Scanning probe microscopy
Surface layers
Nb
surface piezoresponse
texture
K
tetragonal tungsten bronze
.
Sr
O
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Summary:Crystallographic characteristics of K 2 Sr 4 Nb 10 O 30 ceramics have been compared to experimental data on the surface piezoresponse studied by method of scanning probe microscopy, which was used to estimate relative values of d 33 piezomodulus. Depending on the orientation of a ceramic sample surface relative to the axis of texture, these values turned out to be 62 or 58 times greater than the moduli of isotropic samples. The observed giant piezoresponse of the ceramic surface can be explained by anisotropic deformation of the crystalline lattice under pressure during hot pressing. The role of domain boundaries and polar nanoregions is discussed.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785019080194