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Dielectric and piezoelectric properties of textured Sr0.53Ba0.47Nb2O6 ceramics prepared by templated grain growth

Published online by Cambridge University Press:  31 January 2011

Cihangir Duran ,
Susan Trolier-McKinstry  and
Gary L. Messing
Cihangir Duran
Affiliation:
Materials Science and Engineering Department, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
Susan Trolier-McKinstry
Affiliation:
Materials Science and Engineering Department, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
Gary L. Messing
Affiliation:
Materials Science and Engineering Department, Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

Fiber textured Sr0.53Ba0.47Nb2O6 ceramics were reactively sintered to ≥95% of the theoretical density from a mixture of SrNb2O6 and BaNb2O6 powders. Texture in 〈001〉 was obtained by templated grain growth on 〈001〉-oriented acicular KSr2Nb5O15 template particles. The most highly textured ceramics had a peak dielectric constant of 23,600 (at Tc = 128 °C), a remanent polarization (Pr) of 20.3 µC/cm2, a saturation polarization (Psat) of 24 µC/cm2 (69–96% of single crystal), and a piezoelectric charge coefficient (d33) of 84 pC/N (76–93% of single crystal). A model, correlating polarization with grain orientation, predicts that Pr increases sharply when a percolating grain network forms to transfer charge between elongated grains.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 9 , September 2002 , pp. 2399 - 2409
Copyright
Copyright © Materials Research Society 2002

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