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Studies of Lead-Free Ferroelectric Materials Derived from the Agnbo3-Based Solid Solution Systems

机译:基于Agnbo3的固溶体系统衍生的无铅铁电材料的研究

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摘要

The lead-free ferroelectric materials, (1-x)AgNbO3-xKNbO3 (AN-KN) and (1-x)AgNbO3-xK0.5Na0.5NbO3 (AN-KNN) solid solutions were prepared in the form of ceramics by solid state reaction under controlled O2 atmosphere. The structure and properties of these two systems have been systematically investigated. The electric study of the AN-KN and AN-KNN ceramics suggests that the dielectric, ferroelectric, and piezoelectric properties in AN are improved significantly by the substitution of KN and KNN, indicating that these materials are promising for a wide range of applications such as ceramic capacitors, electromechanical transducers, and non-volatile memory devices. Such enhanced properties are attributed to the induced normal ferroelectric state in AN–based solid solutions. The crystal structural analysis of 0.80AN-0.20KNN confirms that the initial centrosymmetric and nonpolar phase (Pbcm) of AN has been transformed into a non-centrosymmetric and polar symmetry Pbc21.
机译:通过固态制备陶瓷形式的无铅铁电材料(1-x)AgNbO3-xKNbO3(AN-KN)和(1-x)AgNbO3-xK0.5Na0.5NbO3(AN-KNN)固溶体在受控的O2气氛下进行反应。已经系统地研究了这两个系统的结构和性质。对AN-KN和AN-KNN陶瓷的电学研究表明,通过取代KN和KNN可以显着改善AN中的介电,铁电和压电性能,表明这些材料在诸如以下的广泛应用中很有希望陶瓷电容器,机电换能器和非易失性存储设备。这种增强的特性归因于在基于AN的固溶体中感应的正常铁电态。 0.80AN-0.20KNN的晶体结构分析证实,AN的初始中心对称相和非极性相(Pbcm)已转换为非中心对称相和极性对称的Pbc21。

著录项

  • 作者

    Wei Chia-Yin Allen;

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  • 年度 2010
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  • 原文格式 PDF
  • 正文语种 English
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