Preparation and humidity sensing properties of Ba_0.8Sr_0.2TiO₃ nanofibers via electrospinning

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• 作者：Yan Xia ; Teng Fei ; ^{feiteng@jlu.edu.cn} ; Yuan He ; Rui Wang ; Fan Jiang ; Tong Zhang ; ^{zhangtong@jlu.edu.cn}
• 关键词：Ba0.8Sr0.2TiO3 ; Electrospinning ; Sensors ; Nanocomposites ; Fibre technology
• 刊名：Materials Letters
• 出版年：2012
• 出版时间：1 January, 2012
• 年：2012
• 卷：66
• 期：1
• 页码：19-21
• 全文大小：446 K

文摘

Ba_0.8Sr_0.2TiO₃/Poly (vinylpyrrolidone) (BST/PVP) composite fibers were successfully synthesized via electrospinning. The ceramic nanofibers were obtained after calcining the composite at 800 ¡ãC for 2 h. The morphology and structure of the BST fibers were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results reveal that the as-synthesized BST nanofibers show a diameter of 50-150 nm with the length over 0.1 mm, and a well-defined perovskite crystal structure. The electrical properties of the as-synthesized BST nanofibers were investigated through an impedance-type humidity sensor. The nanofibers exhibited excellent humidity sensing properties at room temperature. The possible sensing mechanism was proposed.