enhanced thermal energy conversion and dynamic hysteresis behavior of sr-added ba0.85ca0.15ti0.9zr0.1o3 ferroelectric ceramics
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2016
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Abstract
This paper deals with a study of Ba0.85Ca0.15−xSrxTi0.9Zr0.1O3 (BCT-BZT-Sr) (x = 0%, 5%, 10% and 15%) polycrystalline ceramics for thermal energy conversion applications using the Olsen cycle. A maximum energy conversion density of 108 kJ/m3 was observed in pristine BCT-BZT for cycle operating at 30–90 °C and 0–20 kV/cm. Moreover, the samples with Sr contents (x) of 5%, 10% and 15% display an energy conversion density of 179 kJ/m3, 149 kJ/m3 and 200 kJ/m3, respectively. The Sr addition almost double the energy conversion over the pristine sample under the similar conditions. Also, the temperature (T)-dependent dynamic hysteresis scaling relations for coercive field (EC) and remnant polarization (Pr) were systematically investigated. The power-law scaling exponents are obtained for EC versus T as EC ∝ T−0.65, EC ∝ T−0.61, EC ∝ T−0.56 and EC ∝ T−0.63 for the samples with Sr contents of 0%, 5%, 10% and 15%, respectively. Similarly, the scaling relations for Pr are Pr ∝ T−1.59, Pr ∝ T−1.59, Pr ∝ T−1.36 and Pr ∝ T−1.32 for the samples with Sr contents of 0%, 5%, 10% and 15%, respectively.
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patel2016journalenhanced
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| Authors | ;Satyanarayan Patel;Deepakshi Sharma;Anupinder Singh;Rahul Vaish |
| Journal | The Journal of antimicrobial chemotherapy |
| Year | 2016 |
| DOI |
10.1016/j.jmat.2016.01.002
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