Nanostructured CuO-α-Fe2O3 solid solution obtained by high-energy ball milling

被引：10
|
作者：
Jiang, JS [1 ]
Yang, XL
Gao, L
Guo, JK
机构：
[1] E China Normal Univ, Dept Phys, Ctr Funct Nanomat & Devices, Shanghai 200062, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 392卷 / 1-2期
关键词：
nanostructured solid solution; high-energy ball milling; CuO; alpha-Fe2O3; Mossbauer spectrum; Neel temperature;
D O I：
10.1016/j.msea.2004.09.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The mixture of alpha-Fe2O3 and CuO crystalline powders in equimolar ratio was subjected to high-energy ball milling to investigate the solid solution process in this system. The phase evolution in the system during the milling was studied by means of X-ray diffraction and Mossbauer spectroscopy. It was found that nanostructured solid solution of CuO-alpha-Fe2O3 with a corundum structure was obtained. Within the solid solution, there existed a gradient distribution of concentration of CuO from the surface to the interior of alpha-Fe2O3. The dissolution of CuO in the alpha-Fe2O3 greatly lowered the Neel temperature of alpha-Fe2O3, which resulted in paramagnetism of the as-milled solid solution whose Mossbauer spectrum showed a doublet absorption line at room temperature. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：179 / 183
页数：5
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