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首页> 外文期刊>Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on >Dielectric and piezoelectric properties of CeO2-added nonstoichiometric (Na0.5K0.5)0.97(Nb0.96Sb0.04)O3 ceramics for piezoelectric energy harvesting device applications
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Dielectric and piezoelectric properties of CeO2-added nonstoichiometric (Na0.5K0.5)0.97(Nb0.96Sb0.04)O3 ceramics for piezoelectric energy harvesting device applications

机译：添加CeO2的非化学计量（Na0.5K0.5）0.97（Nb0.96Sb0.04）O3陶瓷的压电和压电性能

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摘要

In this study, nonstoichiometric (Na0.5K0.5)0.97(Nb0.96Sb0.04)O3 ceramics were fabricated and their dielectric and piezoelectric properties were investigated according to the CeO2 addition. In this ceramic composition, CeO2 addition improved sinterability, electromechanical coupling factor kp, mechanical quality factor Qm, piezoelectric constant d33, and g33. At the sintering temperature of 1100u000b0;C, for the 0.2wt% CeO2 added specimen, the optimum values of density = 4.359 g/cm3, kp = 0.443, Qm = 588, ;5;r = 444, d33 = 159 pC/N, and g33 = 35 ?? 10??3 V??m/N, were obtained. A piezoelectric energy harvesting device using 0.2wt% CeO2- added lead-free (K0.5Na0.5)0.97(Nb0.96Sb0.04)O3 ceramics and a rectifying circuit for energy harvesting were fabricated and their electrical characteristics were investigated. Under an external vibration acceleration of 0.7g, when the mass, the frequency of vibration generator, and matching load resistance were 2.4 g, 70 Hz, and 721 :9;, respectively, output voltage and power of piezoelectric harvesting device indicated the optimum values of 24.6 mVrms and 0.839 ;C;W, respectively-suitable for application as the electric power source of a ubiquitous sensor network (USN) sensor node.
机译：在这项研究中，制造了非化学计量的（Na0.5K0.5）0.97（Nb0.96Sb0.04）O3陶瓷，并根据CeO2的添加研究了它们的介电和压电性能。在该陶瓷组合物中，添加CeO2改善了烧结性，机电耦合系数kp，机械品质因数Qm，压电常数d33和g33。在1100u000b0; C的烧结温度下，对于添加0.2wt％CeO2的样品，最佳密度值= 4.359 g / cm3，kp = 0.443，Qm = 588，; 5; r = 444，d33 = 159 pC / N ，且g33 = 35 ??得到10 -3 V 18 m / N。制备了一种压电能量收集装置，该装置使用0.2wt％的CeO2添加无铅（K0.5Na0.5）0.97（Nb0.96Sb0.04）O3陶瓷和用于能量收集的整流电路，研究了它们的电特性。在0.7g的外部振动加速度下，当质量，振动发生器的频率和匹配的负载电阻分别为2.4 g，70 Hz和721：9时，压电收割装置的输出电压和功率表示最佳值24.6 mVrms和0.839; C; W分别适合用作普遍存在的传感器网络（USN）传感器节点的电源。

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