论文标题
泄漏对电力转换器发电的影响
Impact of Leakage for Electricity Generation by Pyroelectric Converter
论文作者
论文摘要
pyroelectric Energy转换器是使用型式材料作为介电层的功能电容器。利用材料的一阶相变，高电装置可以在较小的温度波动中产生足够的电力。但是，大多数载波电容器在能量转化期间都在泄漏。在本文中，我们通过考虑电泄漏来分析pyroelectric能量转化的热力学。我们的热力学模型通过使用具有不同型层状特性和泄漏行为的三个相转化的铁电材料进行了实验验证。我们证明，泄漏对发电的影响是突出的，有时可能会与电上将发电混淆。我们发现了理想的材料候选者（BA，CA）（Ti，Zr，Ce）O $ _3 $，它显示出大型的pyroelectric电流和极低的泄漏电流。由该材料制成的pyroelectric转换器即使在1389年的热力学转换周期之后，也会产生1.95 $ $ $ $ $ $ $ $ $ $ $^2 $ pyroelectric电流密度和0.2 j/cm $^3 $ pyroelectric工作密度。
Pyroelectric energy converter is a functional capacitor using pyroelectric material as the dielectric layer. Utilizing the first-order phase transformation of the material, the pyroelectric device can generate adequate electricity within small temperature fluctuations. However, most pyroelectric capacitors are leaking during energy conversion. In this paper, we analyze the thermodynamics of pyroelectric energy conversion with consideration of the electric leakage. Our thermodynamic model is verified by experiments using three phase-transforming ferroelectric materials with different pyroelectric properties and leakage behaviors. We demonstrate that the impact of leakage for electric generation is prominent, and sometimes may be confused with the actual power generation by pyroelectricity. We discover an ideal material candidate, (Ba,Ca)(Ti,Zr,Ce)O$_3$, which exhibits large pyroelectric current and extremely low leakage current. The pyroelectric converter made of this material generates 1.95 $μ$A/cm$^2$ pyroelectric current density and 0.2 J/cm$^3$ pyroelectric work density even after 1389 thermodynamic conversion cycles.
