标题：Effect of Calcining Temperature on Morphology and Properties of BiFeO3 Fibers
作者：Li, Yan'an ;Yang, Rulu ;Zhang, Hua ;Sun, Haibin ;Si, Weimeng ;Li, Jiao
作者机构：[Li, Yan'an ;Yang, Rulu ;Zhang, Hua ;Sun, Haibin ;Si, Weimeng ;Li, Jiao ] School of Materials Science and Engineering, Shandong University of Technolo 更多
来源：Cailiao Daobao/Materials Review
摘要：By an electrospinning and a subsequent calcination process, a series of BiFeO3 (BFO) fibers differing in calcining temperature were prepared. The calcining temperature dependence of the photoabsorbing, ferroelectric, ferromagnetic and photocatalytic properties of the resultant BFO fibers were investigated, and the morphology and phase composition were also characterized. Results showed that the continuous perovskite BFO fibers with smooth surfaces, diameters of about 220 nm, and a few Bi25FeO40 impurity can be obtained by calcination at 550 ℃. A higher calcining temperature (600 ℃) causes the elimination of impurity phase, the decrement of fiber diameter, as well as the morphology transition to the bead string. Moreover, the further increased temperature (approaching 700 ℃) will result in the morphology of irregularly short sticks due to the breakup and collapse of BFO fibers. The electrospun fibers calcined at 600 ℃ show outstanding ferroelectricity, high photocatalytic activity and stability, which can be attri-buted to better crystallinity, narrower band gap and unique one-dimensional morphology.
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