PREPARATION OF ULTRAFINE HIGH-DENSITY GAMMA-FERRIC-OXIDE USING AEROSOL OT MICROEMULSIONS AND ITS CHARACTERIZATION

被引：39
作者：
CHHABRA, V
LAL, M
MAITRA, AN
AYYUB, P
机构：
[1] UNIV DELHI,DEPT CHEM,DELHI 110007,INDIA
[2] TATA INST FUNDAMENTAL RES,MAT SCI GRP,BOMBAY 400005,MAHARASHTRA,INDIA
来源：
COLLOID AND POLYMER SCIENCE | 1995年 / 273卷 / 10期
关键词：
GAMMA FERRIC OXIDE; AOT MICROEMULSION; ULTRAFINE PARTICLES;
D O I：
10.1007/BF00660371
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：
Ultrafine gamma ferric oxide has been prepared by controlled heating of ferrous oxalate at a temperature range of 225 degrees to 300 degrees C in moist air. Ferrous oxalate was prepared both in aqueous as well as in Aerosol OT microemulsion systems. It has been observed that the product is always a mixture of alpha and gamma ferric oxides which were characterized by TGA, DTA and XRD studies. Microemulsion mediated ferrous oxalate was found to yield more gamma ferric oxide than that from ferrous oxalate prepared in aqueous solution. However, the yield of gamma ferric oxide prepared through microemulsion mediated system depends on the size of the microemulsion droplets in which precursors have been participated as well as calcination temperature.
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页码：939 / 946
页数：8
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