Characterization and modification of nanocrystalline iron oxide powders prepared by an inert gas condensation technique

Chung Kwei Lin, Chien Yie Tsay, Chin Yi Chen, Wei Hsiang Chan, Cherng Yuh Su, Hong Ming Lin

研究成果: 雜誌貢獻文章

摘要

Nanocrystalline iron oxide powders were prepared by an inert gas condensation technique under various oxygen partial pressures. The as-prepared nanocrystalline iron oxide powders were further modified by electroless nickel plating. The as-prepared and modified nanocrystalline powders were characterized by X-ray diffraction, transmission electron microscopy, and synchrotron X-ray absorption techniques. In addition, magnetic properties of the iron oxide nanoparticles before and after electroless nickel plating were evaluated by vibrating sample magnetometer. The experimental results show that the as-prepared nanocrystalline iron oxide powders exhibited a mixture of iron and γ-Fe2O3 phases. TEM observations revealed that oxidation started from the surface of the gas-condensed iron nanoparticles. The amount of iron oxide increased with increasing oxygen partial pressure and was confirmed by synchrotron x-ray absorption examination. A decrease in saturated magnetization and coercivity of the nanocrystalline iron oxide powders was observed after electroless nickel plating.
原文英語
頁(從 - 到)1379-1382
頁數4
期刊Materials Science Forum
561-565
發行號PART 2
出版狀態已發佈 - 2007
對外發佈Yes
事件6th Pacific Rim International Conference on Advanced Materials and Processing, PRICM 6 - Jeju, 大韓民國
持續時間: 十一月 5 2007十一月 9 2007

    指紋

ASJC Scopus subject areas

  • Materials Science(all)

引用此

Lin, C. K., Tsay, C. Y., Chen, C. Y., Chan, W. H., Su, C. Y., & Lin, H. M. (2007). Characterization and modification of nanocrystalline iron oxide powders prepared by an inert gas condensation technique. Materials Science Forum, 561-565(PART 2), 1379-1382.