Template-free formation of urchin-like FeNi₃ microstructures by hydrothermal reduction

详细信息    查看全文

• 作者：Huiyu Chen^a ; ^b ; ^{hychen09@sina.com} ; Chunju Xu^a ; ^b ; Guizhe Zhao^a ; ^b ; Yaqing Liu^a ; ^b ; ^{zfflyq98@163.com}
• 关键词：Metals and alloys ; FeNi3 microstructures ; Hydrothermal ; Crystal growth
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 January, 2013
• 年：2013
• 卷：91
• 期：Complete
• 页码：75-77
• 全文大小：800 K

文摘

Urchin-like FeNi₃ microstructures were hydrothermally synthesized at 170 ¡ãC for 24 h without using any template or external magnetic field. The morphology and size of final products strongly depended on the reaction time and temperature. The microstructures and shapes of as-prepared samples were investigated in details by XRD, EDS, TEM, SEM techniques. The formation mechanism of such novel FeNi₃ was discussed on the basis of controlled experiments. Compared to FeNi₃ bulk material and submicrometre spheres, urchin-like FeNi₃ microstructures exhibited a decreased saturation magnetization (M_s, 70.7 emu/g) but an enhanced coercivity (H_c, 78.4 Oe) due to their peculiar morphology.