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

页码：66 / 71

页数：6

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