氧化铒稳定氧化铋纳米纤维的制备及性能研究

Preparation and investigation of the conductivity of Er2O3-stablilizedBi2O3 nanofiber

摘要:

本文采用电纺丝法制备了20%氧化铒稳定氧化铋 (ESB)纳米纤维电解质材料,并表征了其晶体结构,微观形貌和电导率等性能。研究结果表明,当不掺杂稀土离子时,只能得到单斜相(α-Bi₂O₃)与四方相(β-Bi₂O₃)共存的Bi₂O₃；而掺杂Er₃₊ 时,可以在室温得到稳定的立方相δ-Bi₂O₃纳米纤维。通过扫描电镜结果可知,500℃、600℃退火后的ESB纳米纤维长径比高、直径均匀、表面光滑。500℃时ESB纳米纤维电导率约为0.03 S?cm_-1。

Abstract:

20% Er₂O₃-stabilized Bi₂O₃ (ESB) nano?bers were prepared through electrospinning followed by calcination. The phase structures, morphology and electrical conductivities of the nano?bers have been investigated. The results show that the monoclinic phase (α) and tetragonal phase (β) coexisted in the un-doped Bi₂O₃ nanofibers, however, the cubic (c) phase could be stabilized in Bi₂O₃ nano?bers when Er₂O₃ doped in the sample. What’s more, the 500℃ and 600℃ calcined ESB nanofibers possessed high length–diameter ratio, uniform morphology and relatively smooth surfaces. An high oxide ion conductivity of the nano?bers was observed at 500℃, which is about 0.03 S?cm_-1.