High thermal stability of piezoelectric properties in (Na 0.5Bi0.5TiO3)x-(BaTiO 3)y-(Na0.5K0.5NbO3) 1-x-y ceramics

Shashaank Gupta, Shashank Priya

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Abstract

We report the piezoelectric and ferroelectric properties of (Na 0.5Bi0.5TiO3)x-(BaTiO 3)y-(Na0.5K0.5NbO3) 1-x-y ceramics for Na0.5K0.5NbO3 rich end of composition (x, y ≤ 0.04 mol. %). These compositions were found to exhibit significantly improved thermal stability of piezoresponse. Variation of dielectric constant as a function of temperature revealed that orthorhombic-tetragonal (To-t) and tetragonal-cubic (Tc) transition temperatures for these compositions were in the vicinity of 0 °C and 330 °C, respectively. Dynamic scaling and temperature dependent X-ray diffraction analysis were conducted. Results are discussed in terms of intrinsic and extrinsic contributions to the piezoelectric response explaining the temperature dependent behavior.

Original languageEnglish (US)
Article number012906
JournalApplied Physics Letters
Volume102
Issue number1
DOIs
StatePublished - Jan 7 2013
Externally publishedYes

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support from Korean Institute of Material Science (KIMS), South Korea.

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