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Proceedings Paper

Raman study of overlap of phase transitions in Zr-doped barium titanate ceramics
Author(s): Pramod Dobal; Anju Dixit; Ram S. Katiyar; Amar S. Bhalla
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Paper Abstract

Micro-Raman study in the temperature range of 70-575 K was performed to investigate the overlap of the basic phase transitions in barium titanate ceramics and single crystals of low Zr concentration. The possibilities of stress and grain size effects that are crucial for the optimization and reproducibility of the property coefficients were ruled out in these ceramics considering the Raman mode frequencies. The tetragonal to cubic transition temperature is found to decrease by increasing Zr-content. The orthorhombic to tetragonal transition temperature that increases with an initial increase in Zr-content merges with tetragonal-cubic transition for x>=0.15 compositions. The merging of phase transitions in these compositions is supported by the temperature dependent dielectric measurements.

Paper Details

Date Published: 11 July 2001
PDF: 10 pages
Proc. SPIE 4333, Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics, (11 July 2001); doi: 10.1117/12.432747
Show Author Affiliations
Pramod Dobal, Univ. of Puerto Rico (United States)
Anju Dixit, Univ. of Puerto Rico (United States)
Ram S. Katiyar, Univ. of Puerto Rico (United States)
Amar S. Bhalla, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 4333:
Smart Structures and Materials 2001: Active Materials: Behavior and Mechanics
Christopher S. Lynch, Editor(s)

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