论文标题
通过乙酰乙酸酯溶胶 - 凝胶法获得的氧化钒薄膜和纤维
Vanadium oxide thin films and fibers obtained by acetylacetonate sol-gel method
论文作者
论文摘要
氧化钒膜和纤维已通过乙酰乙酸酯溶胶 - 凝胶法制造，然后在湿氮中退火。样品的特征是X射线衍射和电导率测量。讨论了溶胶衰老，前体分解和气体大气组成对膜的退火过程，结构和特性的影响。选择了湿氮中无定形膜退火的两阶段温度状态，以形成良好的Vo2相：1）25-550 c和2）550-600 C。同样，研究了氧化物氧化物纤维的定性（缺陷和凝胶滴）以及定量（长度和直径）特性的定性（缺陷和凝胶滴）的影响。
Vanadium oxide films and fibers have been fabricated by the acetylacetonate sol-gel method followed by annealing in wet nitrogen. The samples are characterized by X-ray diffraction and electrical conductivity measurements. The effects of a sol aging, the precursor decomposition and the gas atmosphere composition on the annealing process, structure and properties of the films are discussed. The two-stage temperature regime of annealing of amorphous films in wet nitrogen for formation of the well crystallized VO2 phase is chosen: 1) 25-550 C and 2) 550-600 C. The obtained films demonstrate the metal-insulator transition and electrical switching. Also, the effect of the polyvinylpyrrolidone additive concentration and electrospinning parameters on qualitative (absence of defects and gel drops) and quantitative (length and diameter) characteristics of vanadium oxide fibers is studied.
