MECHANISM OF FORMATION OF NANOCRYSTALLINE HEMATITE PREPARED BY FREEZE-DRYING

被引：21

作者：

BERMEJO, E ^{[1
]}

DANTAS, T ^{[1
]}

LACOUR, C ^{[1
]}

机构：

[1] ECOLE SUPER PHYS & CHIM IND VILLE PARIS,CERAM & MAT MINERAUX LAB,CNRS,URA 1466,F-75231 PARIS 05,FRANCE

来源：

MATERIALS RESEARCH BULLETIN | 1995年 / 30卷 / 05期

关键词：

FREEZE-DRYING; HEMATITE; AMORPHOUS; ULTRA-FINE POWDERS; CRYSTALLIZATION MECHANISM;

D O I：

10.1016/0025-5408(95)00045-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to elucidate the mechanism of the elaboration of raw materials by freeze-drying, a characterization of alpha-Fe2O3 freeze-dried powders has been undertaken during the main phases of the preparation. The freezing of the salt solution and the salt solidification in amorphous form govern mainly the properties of the produced powder -ultrafine, pure and highly reactive particles- and its thermal behaviour. The usefulness of such unconventional process is the lowering of temperature of chemical reactions involving alpha-Fe2O3.

引用

页码：645 / 652

页数：8

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