Synthesis of monodisperse Al-substituted hematite particles from highly condensed metal hydroxide gels

被引:17
作者
Liu, QY [1 ]
Osseo-Asare, K [1 ]
机构
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
关键词
particle synthesis; monodisperse hematite; aluminum substitution; gel-sol process;
D O I
10.1006/jcis.2000.7142
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
Monodispersed aluminum-substituted hematite particles were synthesized from concentrated mixed solutions of FeCl3 and AlCl3 using the gel-sol process. With increasing aluminum content (Ay(Fe + Al)) in the starting solutions, hematite particles became more and more elongated. The product particles exhibited ellipsoidal, rod- and peanut-like shapes, depending on Al concentration. Higher Al content (> 20 mol%) in the system greatly suppressed the formation of hematite, Atomic emission spectrometry analysis and lattice parameter measurement confirmed the substitution of Al in hematite particles, (C) 2000 Academic Press.
引用
收藏
页码:401 / 403
页数:3
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