Phase composition, magnetic properties and thermal behavior of a novel Fe2O3-SiO2 composite material

被引：5
作者：
Panasenko, Alexander E. [1 ,2 ]
Tkachenko, Ivan A. [1 ]
Zemnukhova, Ludmila A. [1 ,2 ]
Shchetinin, Igor V. [3 ]
Didenko, Nina A. [1 ]
机构：
[1] Russian Acad Sci, Inst Chem, Far East Div, Pr Stoletiya Vladivostoka 159, Vladivostok 690022, Russia
[2] Far East Fed Univ, Sukhanova 8, Vladivostok 690950, Russia
[3] Technol Univ, Moscow State Inst Steel & Alloys, Leninsky Pr 4, Moscow 117936, Russia
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2016年 / 405卷
关键词：
Composite materials; Nanoparticles; Magnetic properties; Iron oxides; Transition temperature; TEMPERATURE; MOSSBAUER; OXIDES; NANOPARTICLES; MAGHEMITE;
D O I：
10.1016/j.jmmm.2015.11.087
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An Fe2O3-SiO2 composite was prepared by controllable Fe3+ and SIO32- hydrolysis. Scanning (SEM) and transmitting (TEM) electron microscopy images showed particles with an average size of 10-30 nm composed of an iron-containing core covered with a silica shell. The FT-IR, vibrating sample magnitometer (VSM), thermogravimetric analysis and Mossbauer spectroscopy study confirmed that the core consisted of ferrihydrite. Heating at 300 degrees C did not result in any noticeable phase transitions, whereas 800 degrees C heating caused the formation of the maghemite gamma-Fe2O3 phase. Such improvement of the thermal stability of maghemite is promising for development of heat-resistant magnetic materials. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：66 / 71
页数：6
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