Synthesis of maghemite sub-microspheres by simple solvothermal reduction method

被引：34

作者：

Liu, Xian-Ming

Fu, Shao-Yun ^{[1
]}

Xiao, Hong-Mei

机构：

[1] Chinese Acad Sci, Tech Inst Phys & Chem, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2006年 / 179卷 / 05期

关键词：

maghemite; sub-microsphere; solvothermal reduction method; ferromagnetic behavior;

D O I：

10.1016/j.jssc.2006.02.003

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Maghemite sub-micrometer-sized spheres were successfully a prepared by a simple solvothermal reduction route at relatively low temperature. The as-obtained sample was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), electron diffraction (ED), X-ray photoelectron spectroscopy (XPS) and superconducting quantum interference device (SQUID) measurements. XRD and XPS analyses indicate the formation of gamma-Fe2O3 phase. TEM results reveal that the gamma-Fe2O3 particles are spherical with the diameter of 200-400 nm. Magnetic measurements show that the Curie temperature of gamma-Fe2O3 sub-microspheres is over 400 K and the sample exhibits ferromagnetic behavior at room temperature. It is found that the sub-microspheres possess high saturation magnetization of 81 emu/g at 300 K. (C) 2006 Elsevier Inc. All rights reserved.

引用

页码：1554 / 1558

页数：5