EFFECT OF PREPARATION TEMPERATURE AND GRINDING TIME OF ALPHA-FE2O3 ON ITS REACTIVITY FOR MGFE2O4 FORMATION

被引：3

作者：

FURUICHI, R ^{[1
]}

NAKANO, S ^{[1
]}

SHIMADA, S ^{[1
]}

ISHII, T ^{[1
]}

机构：

[1] HOKKAIDO UNIV,DEPT APPL CHEM,KITA KU,SAPPORO,HOKKAIDO 060,JAPAN

来源：

SOLID STATE IONICS | 1993年 / 63-5卷

关键词：

D O I：

10.1016/0167-2738(93)90106-D

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：

Alpha-Fe2O3(500) and alpha-Fe2O3(1200) were prepared at 500-degrees-C and 1200-degrees-C, and ground for t(m) = 0-300 min. The BET area (S(BET)), median diameter (D(m)), and crystallite size (D(c)) of alpha-Fe2O3(500) were unchanged with t(m), but alpha-Fe2O3(1200) showed increasing S(BET) and decreasing D(m) and D(c). MgFe2O4 formed through surface reaction followed by the process obeying Jander's law. Grinding increased the fractional surface reaction. Jander's rate was constant for alpha-Fe2O3(500) and increased with t(m) for alpha-Fe2O3(1200).

引用

页码：195 / 200

页数：6

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