title: Nanofibers of barium strontium titanate (BST) by sol-gel processing and electrospinning.
abstract: 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.
authors.affiliation: Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand. sanmae@kku.ac.th
authors.forename: Santi
authors.initials: S
authors.lastname: Maensiri
authors.forename: Wiwat
authors.initials: W
authors.lastname: Nuansing
authors.forename: Jutharatana
authors.initials: J
authors.lastname: Klinkaewnarong
authors.forename: Paveena
authors.initials: P
authors.lastname: Laokul
authors.forename: Jinda
authors.initials: J
authors.lastname: Khemprasit