论文标题
无铅BATI0.89SN0.11O3陶瓷中的高能量存储效率和大电脑效应
High Energy Storage Efficiency and Large Electrocaloric Effect in Lead-Free BaTi0.89Sn0.11O3 Ceramic
论文作者
论文摘要
通过固态反应方法详细阐述了无铅BATI0.89SN0.11O3（BTSN）陶瓷，并以25 kV/cm的速度研究了其介电，铁电，储能，机电以及电动性能。通过X射线衍射分析证实了纯钙钛矿结构。在41°C下，发现介电常数的最大值为17390。在60°C下观察到总能量密度增强，能量密度和能量存储效率分别为92.7 MJ/cm3、84.4 mJ/cm3和91.04％，而在100°C下获得了95.87％的最高存储效率。在室温下，机电应变和大信号压电系数最大为0.07％和280 pm/v。 0.71 K的大电位效应和0.28的电位反应性。在25 kV/cm以下的49°C下，10-6 k.mm/kv通过麦克斯韦的关系从p-e磁滞回路确定的铁电偏振P（t，e）间接计算。通过利用Landau-Ginzburg-Devonshire（LGD）现象学理论，估计在25 kV/cm的50°C下，电脉反应为0.61 K。我们得出的结论是，BTSN无铅陶瓷是在高效储能设备和固态制冷技术中潜在应用的有前途应用的候选人。
Lead-free BaTi0.89Sn0.11O3 (BTSn) ceramic was elaborated via a solid-state reaction method and its dielectric, ferroelectric, energy storage, electromechanical as well as electrocaloric properties were investigated at 25 kV/cm. Pure perovskite structure was confirmed by X-ray diffraction analysis. The maximum of the dielectric constant was found to be 17390 at 41 °C. The enhanced total energy density, the recovered energy density, and the energy storage efficiency of 92.7 mJ/cm3, 84.4 mJ/cm3, and 91.04%, respectively, were observed at 60 °C, whereas the highest storage efficiency of 95.87 % was obtained at 100 °C. At room temperature, the electromechanical strain and the large-signal piezoelectric coefficient reached a maximum of 0.07 % and 280 pm/V. The large electrocaloric effect of 0.71 K and the electrocaloric responsivity of 0.28. 10-6 K.mm/kV at 49 °C under 25 kV/cm were indirectly calculated via Maxwell relation from the ferroelectric polarization P (T, E) that was determined from the P-E hysteresis loops. By exploiting the Landau-Ginzburg-Devonshire (LGD) phenomenological theory, the electrocaloric response was estimated to be of 0.61 K at 50 °C under 25 kV/cm. We conclude that BTSn lead-free ceramic is a promising candidate for potential applications in high-efficiency energy storage devices and solid-state refrigeration technology.
