Characterization of iron oxides embedded in silica gel obtained by two different methods

被引：30

作者：

Barrado, E ^{[1
]}

Rodríguez, JA

Prieto, F

Medina, J

机构：

[1] Univ Valladolid, Fac Ciencias, Dept Quim Analit, E-47005 Valladolid, Spain

[2] Univ Autonoma Estado Hidalgo, Ctr Invest Quim, Hidalgo 42076, Mexico

[3] Univ Valladolid, Fac Ciencias, Dept Fis Mat Condensada Cristalog & Mineral, E-47005 Valladolid, Spain

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2005年 / 351卷 / 10-11期

关键词：

D O I：

10.1016/j.jnoncrysol.2005.02.001

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A new way of obtaining iron oxides embedded in amorphous silica gel matrices using Fe, oxygen and tetraethoxysilane (TEOS) as precursors is described. The product of this new method was compared to the compound produced when hydrochemically synthesized iron ferrite (magnetite) was directly embedded in silicon oxide (SiO2). The two xerogels were characterized and found to differ substantially. The compound obtained using the first procedure is amorphous iron oxide-hydroxide embedded in silica gel and lacks magnetic properties. In contrast, the silicon oxide particles in the second compound become partly coated by the magnetite, such that its magnetic properties are similar to those of magnetite proper. © 2005 Elsevier B.V. All rights reserved.

引用

页码：906 / 914

页数：9

共 25 条

[1] PREPARATION OF SIO2 POWDER CONTAINING FINE GAMMA-FE2O3 PARTICLES [J].