The influence of the coprecipitation conditions on the low-temperature formation of barium hexaferrite

被引：15
|
作者：
Lisjak, Darja [1 ]
Drofenik, Miha [1 ]
机构：
[1] Jozef Stefan Inst, Ljubljana 1000, Slovenia
来源：
JOURNAL OF MATERIALS SCIENCE | 2007年 / 42卷 / 20期
关键词：
D O I：
10.1007/s10853-007-1850-0
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have investigated the formation of barium hexaferrite via the coprecipitation method. Various reagent salts and solvents were tested, and the coprecipitates were calcined at 300-800 degrees C for 1-50 h. The samples were characterized with X-ray powder diffraction, electron microscopy and magnetometry. The coprecipitation conditions had a significant influence on the formation time of the barium hexaferrite, which started to form at as low as 500 degrees C. The optimum coprecipitation conditions were: ethanol as a solvent and chlorides as reagent salts. Powders with optimum magnetic properties, saturation magnetization 60-63 emu/g and coercivity 4-5 kOe, were obtained by calcining at 600-700 degrees C.
引用
收藏
页码：8606 / 8612
页数：7
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