溶胶-凝胶模板法制备K0.5Na0.5NbO3纳米管阵列及其表征

doi:10.3724/SP.J.1077.2010.00687

无机材料学报 ›› 2010, Vol. 25 ›› Issue (7): 687-690.DOI: 10.3724/SP.J.1077.2010.00687

溶胶-凝胶模板法制备K_0.5Na_0.5NbO₃纳米管阵列及其表征

钱哲理, 顾豪爽, 胡永明, 周迪, 王钊, 夏华婷

(湖北大学物理学与电子技术学院铁电压电材料与器件湖北省重点实验室, 武汉 430062)

收稿日期:2009-11-16 修回日期:2010-01-15 出版日期:2010-07-20 网络出版日期:2010-06-10
基金资助:
国家自然科学基金(50872031, 90923013)

Fabrication and Characterization of K_0.5Na_0.5NbO₃ Nanotube Arrays by Sol-Gel AAO Template Method

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

(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

摘要/Abstract

摘要：

以乙醇铌、乙酸钾和乙酸钠为原料, 乙二醇甲醚为溶剂, 采用溶胶-凝胶(Sol-Gel)阳极氧化铝(AAO)模板法制备了K_0.5Na_0.5NbO₃ (KNN)纳米管阵列. 利用热分析确定晶化温度, 采用X射线衍射、扫描电子显微镜和透射电子显微镜表征KNN纳米管的物相、形貌和微观结构. 结果表明, KNN最佳的晶化温度为700℃; KNN纳米管阵列结晶性良好, 为单斜钙钛矿多晶结构, 单根纳米管的外径约为200 nm, 管壁厚约为20 nm. 对KNN纳米管阵列的铁电性能表征显示, 其剩余极化率Pr约为1.86 µC/cm², 矫顽场Ec约为0.68 kV/cm.

关键词: K_0.5Na_0.5NbO₃, 钙钛矿, 溶胶?凝胶, 纳米管阵列, 铁电性

Abstract:

K_0.5Na_0.5NbO₃(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: K_0.5Na_0.5NbO₃, perovskite, Sol-Gel, nanotube array, ferroelectric

中图分类号:

TB383

钱哲理, 顾豪爽, 胡永明, 周迪, 王钊, 夏华婷. 溶胶-凝胶模板法制备K_0.5Na_0.5NbO₃纳米管阵列及其表征[J]. 无机材料学报, 2010, 25(7): 687-690.

QIAN Zhe-Li, GU Hao-Shuang, HU Yong-Ming, ZHOU Di, WANG Zhao, XIA Hua-Ting. Fabrication and Characterization of K_0.5Na_0.5NbO₃ Nanotube Arrays by Sol-Gel AAO Template Method[J]. Journal of Inorganic Materials, 2010, 25(7): 687-690.

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溶胶-凝胶模板法制备K_0.5Na_0.5NbO₃纳米管阵列及其表征

Fabrication and Characterization of K_0.5Na_0.5NbO₃ Nanotube Arrays by Sol-Gel AAO Template Method

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