MECHANISM OF AL-SUBSTITUTION FOR FE-SUBSTITUTION DURING THE ALPHA-(FE, AL)OOH-]GAMMA-(FE, AL)2O3 TRANSFORMATION

被引：5
|
作者：
WOLSKA, E
SZAJDA, W
PISZORA, P
机构：
[1] Department of Magnetochemistry, Adam Mickiewicz University, PL-60780 Poznań
来源：
SOLID STATE IONICS | 1994年 / 70卷 / pt 1期
关键词：
D O I：
10.1016/0167-2738(94)90368-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effects of aluminium ions on the crystal structure and magnetic characteristics of the final product and of intermediate phases appearing during the pseudomozphic transformation of the orthorhombic alpha-ferric hydroxide oxide in the tetragonal spinel gamma-ferric oxide were studied by X-ray powder diffraction, infrared spectroscopy and magnetic measurements. Solids solutions of the composition alpha-(Fe1-xAlx)1-y/3(OH)1+yO1-y were formed by incorporation of aluminium from the [Al(OH)4]-solution. The ordering of cationic vacancies and the tetragonal superstructure of gamma-(Fe, Al)2O3 were not affected by the substitution of aluminium for iron.
引用
收藏
页码：537 / 541
页数：5
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