论文标题
PBSC0.5TA0.5O3在现场应用和去除的不对称电气效应
Asymmetric electrocaloric effects in PbSc0.5Ta0.5O3 on field application and removal
论文作者
论文摘要
PBSC0.5TA0.5O3散装陶瓷的电驱动热变化是使用温度和电场依赖性差分扫描量热法和红外温度测定法研究的。在第一次应用和去除电场时，我们发现由于滞后而导致的等温熵变化$δ$ s和绝热温度变化$δ$ t。在随后的场循环中，由于熵 - 温度图的同层腿中的非线性，我们发现进一步的不对称性在$δ$ t的大小中。
Electrically driven thermal changes in PbSc0.5Ta0.5O3 bulk ceramics are investigated using temperature and electric-field dependent differential scanning calorimetry and infrared thermometry. On first application and removal of electric field, we find asymmetries in the magnitude of isothermal entropy change $Δ$ S and adiabatic temperature change $Δ$ T, due to hysteresis. On subsequent field cycling, we find further asymmetries in the magnitude of $Δ$ T due to non-linearity in the isofield legs of entropy-temperature plots.
