Preparation of Ba(1−x)SrxTiO3 fiber arrays and influence on its dielectric properties

Abstract

In this paper, the Ba[Formula: see text]Sr[Formula: see text]TiO3 (BST) fiber arrays in an orderly manner were successfully fabricated by electrospinning. The arrangement of the fiber arrays and their dielectric properties at different rotation speeds were investigated. The microstructure, phase composition and dielectric properties of the fabricated fiber arrays were detected via field-emission scanning electron microscope, X-ray diffraction and automatic component analyzer. The results indicated that the orientation of the BST fiber arrays could be affected by the drum rotational speed variation of the roller receiver. The orientation degree of the BST fiber arrays increased and the diameter of the BST fiber arrays decreased with the increasing of the drum rotational speed. With the content of polyvinylpyrrolidone at 8% and the speed of 1000 r/min, the orientation degree of the BST fiber arrays gets a better state and the best dielectric constant of 104. Moreover, the ferroelectric performance of BST fiber arrays in ambient and cryogenic environments has a maxima Curie temperature of [Formula: see text]C.