Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (7): 687-690.DOI: 10.3724/SP.J.1077.2010.00687

• Research Paper • Previous Articles     Next Articles

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

QIAN Zhe-Li, GU Hao-Shuang, HU Yong-Ming, ZHOU Di, WANG Zhao, XIA Hua-Ting   

  1. (Faculty of Physics & Electronic Technology, State Key Lab of Ferro & Piezoelectric Materials and Devices of Hubei Province, Hubei University, Wuhan 430062, China)
  • Received:2009-11-16 Revised:2010-01-15 Published:2010-07-20 Online:2010-06-10

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.

Key words: K0.5Na0.5NbO3, perovskite, Sol-Gel, nanotube array, ferroelectric

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