论文标题
灯笼改性铅锆钛酸谷物陶瓷中的电气响应
Electrocaloric response in Lanthanum-modified lead zirconate titanate ceramics
论文作者
论文摘要
最新的发现在聚合物和无机铁电材料中具有较大的电气（EC）效应为新一代固态冷却或加热设备开发的潜在可能性，具有更好的能源效率，这可能对环境危害较小。我们通过使用直接测量值，PB1-XLAX（Zryti1-Y）中电气响应的温度和电场依赖性为1-X/4O3散装陶瓷（PLZT），X = 0.06和0.12。在这里，在PLZT组成相图的一部分中探测了EC响应的特性，该图具有低y = 0.40组成，其中先前未研究EC效应。测量结果表明，在430 K和80 kV/cm时的EC温度变化（ΔTEC）为2.92 K，在12/40/60 PLZT样品中存在较大的EC响应。该值超过了先前获得的ΔTec值，在弛豫的铁电X/65/35 PLZT组成中，并匹配了奈贝特铅镁铅钛钛酸钛陶瓷中最佳的EC响应。在20 kV/cm和410 K的较低电场上确定的0.41x10-6 km/v的电气反应性（ΔT/δe）值与在其他钙钛矿铁电极中观察到的值相当。
Recent findings of a large electrocaloric (EC) effect in polymeric and inorganic ferroelectric materials open a potential possibility of development of solid-state cooling or heating devices of new generation with better energy efficiency that may be less harmful for the environment. We investigate by using direct measurements, the temperature and electric field dependence of the electrocaloric response in Pb1-xLax(ZryTi1-y)1-x/4O3 bulk ceramics (PLZT) with x=0.06 and 0.12. Here, the properties of the EC response were probed in a part of the PLZT composition phase diagram with low y=0.40 composition, in which the EC effect was not previously studied. Measurement results show the existence of the sizeable EC response in 12/40/60 PLZT sample with the EC temperature change (ΔTEC) of 2.92 K at 430 K and 80 kV/cm. This value exceeds previously obtained ΔTEC values in relaxor ferroelectric x/65/35 PLZT compositions and rivaling the best EC response in lead magnesium niobate-lead titanate ceramics. The electrocaloric responsivity (ΔT/ΔE) value of 0.41x10-6 Km/V determined at a lower electric field of 20 kV/cm and 410 K is comparable to those observed in other perovskite ferroelectrics.
