TITLE

Manganese-modified BiScO3–PbTiO3 piezoelectric ceramic for high-temperature shear mode sensor

AUTHOR(S)
Shujun Zhang; Eitel, Richard E.; Randall, Clive A.; Shrout, Thomas R.; Alberta, Edward F.
PUB. DATE
June 2005
SOURCE
Applied Physics Letters;6/27/2005, Vol. 86 Issue 26, p262904
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The bismuth-based perovskite solid solution (100-x)BiScO3-xPbTiO3 (BSPT) was investigated for use at temperatures up to 400 °C and above. The high-temperature resistivity, together with dielectric and piezoelectric behaviors of the shear mode for manganese-modified BSPT ceramics near the morphotropic phase boundary composition were studied. The resistivity and time constant were found to be 3×107 Ω cm and 0.08 s, respectively, at 450 °C for modified BSPT66. The dielectric constant Κ11T and dielectric loss were found to be 1112 and 1%, respectively, at room temperature, showing a Curie temperature at 468 °C. The electromechanical coupling factor k15 was calculated to be 61%, staying nearly constant up to 440 °C, expanding the temperature usage range significantly. The properties indicate that the modified BSPT66 material is a promising candidate for high-temperature shear sensor applications.
ACCESSION #
17545071

 

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