CHROMIUM SUBSTITUTION AND CRYSTALLINITY CHANGES IN GAMMA-FEOOH

被引：6

作者：

MORALES, J

TIRADO, JL

VALERA, C

机构：

[1] Departamento de Química Inorgánica e Ingeniería Ouímica, Facultad de Ciencias, Universidad de Córdoba

来源：

JOURNAL OF MATERIALS SCIENCE | 1990年 / 25卷 / 03期

关键词：

D O I：

10.1007/BF01045390

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cr-substitution in γ-FeOOH takes place with changes in the unit cell parameters and a marked decrease in crystallinity. The γ-FeOOH structure is maintained up to 5.0 atomic % with a progressive diminution of crystallite size, as shown by X-ray line broadening analysis and electron microscopy. The dehydroxilation of the Cr-substituted oxyhydroxide to γ-sesquioxides and the phase transition γ →α sesquioxide take place at lower temperatures than in γ-FeOOH, due to the lower crystallinity. © 1990 Chapman and Hall Ltd.

引用

页码：1813 / 1815

页数：3

共 14 条

[1] THE DETERMINATION OF CRYSTALLITE-SIZE AND LATTICE-STRAIN PARAMETERS IN CONJUNCTION WITH THE PROFILE-REFINEMENT METHOD FOR THE DETERMINATION OF CRYSTAL-STRUCTURES [J].