The Influence of DC Bias on the Dielectric Response of Sr1-xCaxTiO3 Ceramics

Abstract:

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The effect of the electric field on the dielectric response of the Sr1-xCaxTiO3 ceramic system was analysed and complemented by structural and microstructural studies. A monotonic decrease of the lattice parameter and an increase of the average grain size from 11 to 23 μm with increasing x were observed by X-ray diffraction and scanning electron microscopy analysis respectively. Samples with x = 0.003 and 0.01 reveal a monotonous increase of low-temperature dielectric constant, corresponding to an enhancement of the tunability and a reduction of the driving electric field at 10-30 K for x = 0.01. For Sr1-xCaxTiO3 ceramic samples with x = 0.04 and 0.10 the ferroelectric phase transition of around 20 K was observed together with the enhanced tunability of the dielectric constant at 30-85 K for x = 0.10.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

240-244

DOI:

10.4028/www.scientific.net/MSF.514-516.240

Citation:

A. Tkach et al., " The Influence of DC Bias on the Dielectric Response of Sr1-xCaxTiO3 Ceramics", Materials Science Forum, Vols. 514-516, pp. 240-244, 2006

Online since:

May 2006

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$35.00

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