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Fabrication and Characterization of K0.5Na0.5NbO3 Nanotube Arrays by Sol-Gel AAO Template Method

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Author(s): QIAN Zhe-Li, GU Hao-Shuang, HU Yong-Ming, ZHOU Di, WANG Zhao, XIA Hua-Ting

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 25;
Issue: 7;
Start page: 687;
Date: 2010;
Original page

Keywords: K0.5Na0.5NbO3 | perovskite | Sol-Gel | nanotube array | ferroelectric

ABSTRACT
K0.5Na0.5NbO3(KNN) nanotube arrays were synthesized by Sol-Gel processing with anodic aluminum oxide templates, using Nb(OC2H5)5, CH3COOK and CH3COONa as the starting materials and 2-methoxyethanol (2-MOE) as solution. The precursor gel was analyzed by thermogravimetric–differential thermal analysis. The phase, morphology and microstructure of KNN nanotube arrays were characterized by X-ray diffraction, scanning electron microscope(SEM) and transmission electron microscope(TEM), respectively. The as-prepared samples are monoclinic phase perovskite structure with the outer-diameter of about 200 nm and wall thickness of about 20 nm. Polarization-electricfield (P-E) response curves of KNN nanotube arrays show that the remanent polarization (Pr) and the coercive electricfield (Ec) are about 1.86  µC/cm2 and 0.68kV/cm, respectively.
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