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首页> 外文期刊>Materials Science and Engineering >Domain evolution and corresponding piezoelectricity of lead-free In_2O_3-doped K_(0.5)Na_(0.5)NbO_3 ceramics together with improved fatigue resistance and temperature stability
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Domain evolution and corresponding piezoelectricity of lead-free In_2O_3-doped K_(0.5)Na_(0.5)NbO_3 ceramics together with improved fatigue resistance and temperature stability

机译：无铅In_2O_3掺杂K_（0.5）Na_（0.5）NbO_3陶瓷的畴演化和相应的压电性，并提高了抗疲劳性和温度稳定性

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摘要

In this paper, (1-x)K0.5Na0.5NbO3-x mol% In2O3 (abbreviated as KNN-xIn) lead-free piezoelectric ceramics were prepared using conventional solid sintering method. The effects of In2O3 on the phase structure, microstructure, domain evolution, electrical properties, fatigue behavior and thermal stability of KNN ceramic matrix were systematically studied. XRD results show that all the ceramics possess the orthorhombic phase with domain architectures presented in the PPM. The addition of In2O3 improved the fatigue resistance owing to the enhanced density. The temperature stability of the 1.0 mol% In2O3 doped sample was significantly improved. It was found that the KNN ceramics with 1.0 mol% In2O3 addition exhibited good electrical properties (d(33)* = 179 pm/v, d(33) = 103 pC/N, T-C = 388 degrees C, P-r = 31.52 mu C/cm(2), epsilon(r) = 327, tans delta = 3.28%). The results suggested that this material should be an attractive lead-free material for piezoelectric applications.
机译：本文采用常规的固体烧结法制备了（1-x）K0.5Na0.5NbO3-x mol％In2O3（简称KNN-xIn）无铅压电陶瓷。系统研究了In2O3对KNN陶瓷基体的相结构，微观结构，畴演化，电性能，疲劳行为和热稳定性的影响。 XRD结果表明，所有陶瓷都具有正交晶相，并且在PPM中具有畴结构。由于增加了密度，In 2 O 3的添加改善了抗疲劳性。 1.0 mol％In2O3掺杂样品的温度稳定性得到显着改善。发现添加1.0 mol％In2O3的KNN陶瓷表现出良好的电性能（d（33）* = 179 pm / v，d（33）= 103 pC / N，TC = 388摄氏度，Pr = 31.52摄氏度/ cm（2），epsilon（r）= 327，tanδ= 3.28％）。结果表明，这种材料应该是用于压电应用的有吸引力的无铅材料。

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