Abstract: 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.
李延安, 杨汝禄, 张华, 孙海滨, 司维蒙, 李蛟. 煅烧温度对铁酸铋纤维形貌及性能的影响[J]. 《材料导报》期刊社, 2018, 32(14): 2340-2344.
LI Yan’an, YANG Rulu, ZHANG Hua, SUN Haibin, SI Weimeng, LI Jiao. Effect of Calcining Temperature on Morphology and Properties of BiFeO3 Fibers. Materials Reports, 2018, 32(14): 2340-2344.
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2018, Vol. 32 
