Nanofibers of barium strontium titanate (BST) by sol-gel processing and electrospinning
Nanofibers of barium strontium titanate (BST) by sol-gel processing and electrospinning
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DOI：
10.1016/j.jcis.2005.11.005
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发表时间：
2006-05-15
影响因子：
9.9
通讯作者：
Khemprasit, Jinda
中科院分区：
文献类型：
--
作者：
Maensiri, Santi;Nuansing, Wiwat;Khemprasit, Jinda
采用静电纺丝法制备了钛酸锶钡（Ba0.6Sr0.4TiO3或BST）纳米纤维，并以含有聚乙烯吡咯烷酮的溶液和BST的溶胶-凝胶溶液为原料。采用TG-DTA、x射线衍射、FT-IR、SEM和TEM对纺丝和煅烧后的BST/PVP复合纳米纤维进行了表征。将BST/PVP复合纳米纤维在700℃以上的空气中煅烧2 h后，成功获得了直径为188 +/- 25 nm，具有良好的立方钙钛矿结构的BST纳米纤维。煅烧温度对纳米纤维的晶体结构和形貌有影响。在低于700℃的温度下煅烧得到无定形相，而在高于700℃的温度下形成具有第二相的BST，如钛酸钡。随着煅烧温度在600 ~ 800℃之间的升高，纳米纤维的直径从208 +/- 35 nm减小到161 +/- 18 nm。版权所有。
This paper describes the fabrication of barium strontium titanate (Ba0.6Sr0.4TiO3 or BST) nanofibers by electrospinning method using a solution that contained poly(vinylpyrrolidone) and a sol-gel solution of BST. The as-spun and calcined BST/PVP composite nanofibers were characterized by TG-DTA, X-ray diffraction, FT-IR, SEM and TEM, respectively. After calcination of the as-spun BST/PVP composite nanofibers at above 700 degrees C in air for 2 h. BST nanofibers of 188 +/- 25 nm in diameter having well-developed cubic-perovskite structure were successfully obtained. The crystal structure and morphology of the nanofibers were influenced by the calcination temperature. Calcination at below 700 degrees C resulted in amorphous phase whereas BST with second phase Such as barium titanate were formed at above 700 degrees C. Diameters of the nanofibers decreased from 208 +/- 35 to 161 +/- 18 nm with increasing calcination temperature between 600 and 800 degrees C. (c) 2005 Elsevier Inc. All rights reserved.