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采用静电纺丝技术制备了PVP/[La(NO3)3+Fe(NO3)3]复合纳米纤维,在700℃下焙烧得到LaFeO3纳米纤维,再以CS2作为硫源进行硫化,成功制备了La2Fe2S5亚微米棒。利用XRD,SEM,EDS,宽频介电松弛谱仪等现代分析手段对样品进行了表征。XRD分析表明:将LaFeO3纳米纤维在CS2气氛中于900℃焙烧4 h得到纯相的La2Fe2S5亚微米棒,属于正交晶系,空间群为A21am。SEM分析表明:La2Fe2S5呈亚微米棒结构,直径和长度分别为851±122 nm和3.25±0.99μm。电分析表明:La2Fe2S5亚微米棒是较好的半导体材料。
The LaFeO3 nanofibers were prepared by electrospinning technique and then LaFeO3 nanofibers were obtained by calcination at 700 ℃. Then CS2 was used as the sulfur source to prepare the La2Fe2S5 nanofibers. Micron rods. The samples were characterized by XRD, SEM, EDS and broadband dielectric relaxation spectroscopy. XRD results showed that LaFeO3 nanofibers were calcined at 900 ℃ for 4 h in CS2 atmosphere to obtain pure La2Fe2S5 submicron rods, belonging to the orthorhombic system with a space group of A21am. SEM analysis showed that La2Fe2S5 was submicron rod with diameter and length of 851 ± 122 nm and 3.25 ± 0.99 μm, respectively. Electrical analysis shows that: La2Fe2S5 submicron rods are better semiconductor materials.