【摘要】 利用电沉积及热硫化法制备了FeS2 多晶薄膜,研究了不同硫化时间对FeS2 薄膜形成过程的影响。结果表明采用Na2S2O3 和FeSO4 水溶液电沉积和150~ 200℃处理可以制备多孔Fe3O4 薄膜,再经400℃、80kPa硫化处理,Fe3O4 可转变成FeS2 多晶薄膜。随硫化时间延长到10h,FeS2 的晶格常数减小而晶粒粗化,再继续延长硫化时间,FeS2 的晶格常数增大而晶粒尺寸下降。可以用点缺陷浓度、相变应力及亚晶界运动等因素分析Fe3O4 向FeS2 转变过程中的微观组织参数变化规律。更多还原

【Abstract】 The polycrystalline FeS₂ films were prepared by thermal sulfurizing the electrodeposited precursive films. The effects of sulfurizing time on the microstructure morphology, lattice constant and crystallite size of the films were investigated. As a precursor, the polyporous Fe₃O₄ films can be obtained by electrodepositing in the aqueous solution of Na₂S₂O₃ and FeSO₄ and annealing at 150～200℃. The precursor can transform into the polycrystalline FeS₂ films by annealing in 80kPa sulphur atmosphere at 400℃. With increasing the sulfurizing time up to 10h, the lattice constant of the FeS₂ films decreases while the crystallite size increases. However, the lattice constant of the FeS₂ films increases but the crystallite size decreases as the sulfurizing time over 10h. The changes of point defect concentration in the crystal lattice, phase transformation stress from Fe₃O₄ to FeS₂ and sub-boundary behaviors in the FeS₂ grains can be considered to be responsible for the changes of microstructure parameters with the sulfurizing time.更多还原