当前位置: X-MOL 学术Phys. B Condens. Matter › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Phase transformation in Fe2O3 nanoparticles: Electrical properties with local electronic structure
Physica B: Condensed Matter ( IF 2.8 ) Pub Date : 2021-07-17 , DOI: 10.1016/j.physb.2021.413275
Suman 1 , Vikas Sharma 2 , Seema Devi 1 , Surjeet Chahal 1 , Jitendra Pal Singh 3 , K.H. Chae 4 , Ashok Kumar 1 , K. Asokan 5 , Parmod Kumar 6
Affiliation  

Present work is focused on the study of various physical properties of different phases (α & γ) of Fe2O3 prepared just by varying initial precursors and solvents. Diverse structural and spectroscopic techniques infer growth of α-phase using gelatin (GEL) + deionized water (DI) while mixed (α & γ)phase is obtained with GEL + ethylene glycol (EG) as precursor and solvents in iron nitrate salt. By controlling the properties of the solvent media, we have been able to tune the crystallite size from 26.31 nm (α-phase) to 38.87 nm (mixed-phase). The corresponding activation energy for α-phase and mixed-phase was calculated using the Arrhenius plot. Dielectric loss and permittivity in both samples exhibited different behaviour with temperature and which can be explained based on their electronic structure studied by the X-ray absorption spectroscopy technique. The interplay of different phases of materials can be achieved just by controlling the synthesis parameters like solvents/precursors or both.



中文翻译:

Fe 2 O 3纳米粒子的相变:具有局部电子结构的电学特性

目前的工作重点是研究 Fe 2 O 3不同相 (α & γ) 的各种物理性质。仅通过改变初始前体和溶剂制备。不同的结构和光谱技术使用明胶 (GEL) + 去离子水 (DI) 推断 α 相的生长,而混合 (α & γ) 相是使用 GEL + 乙二醇 (EG) 作为前体和硝酸铁盐中的溶剂获得的。通过控制溶剂介质的特性,我们已经能够将微晶尺寸从 26.31 nm(α 相)调整到 38.87 nm(混合相)。使用阿伦尼乌斯图计算 α 相和混合相的相应活化能。两个样品的介电损耗和介电常数随温度的变化表现出不同的行为,这可以根据通过 X 射线吸收光谱技术研究的电子结构来解释。

更新日期:2021-07-23
down
wechat
bug