The High DC Electric Field Effects on the Dielectric Behavior of Barium Strontium Titanate Ceramics

Abstract:

BaxSr1-xTiO3 (x=0.4, 0.5, 0.6) ceramics were fabricated by the conventional solid-state reactions method. The temperature dependences of the dielectric constant and tunability were investigated under high DC electric field. It was found that the change of dielectric constant and tunability under the applied electric field were closely related to ferroelectric phase, phase transition region and paraelectric phase states. The Curie temperature (Tc) was gradually shifted to higher temperature and were broadened and depressed with increasing of DC electric field. The tunability dependence of temperature exhibits different trends in a wide temperature range and reaches a maximum value near the ferroelectric-paraelectric phase transition. These results may be helpful in understanding the mechanism of dielectric response under higher electric field.

• Periodical: Key Engineering Materials (Volume 547)
• Pages: 125-132
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.547.125
• Online since: April 2013
• Authors: Qi Wei Zhang, Ji Wei Zhai, Xi Yao
• Keywords: Curie Peaks, Electric Field, Tunability

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