Mechanism of Phase Transformation and Formation of Barium Hexaferrite Doped with Rare-Earths in Sol-Gel Process
来源期刊：JOURNAL OF RARE EARTHS2003年第1期
论文作者：车平 张军 洪广言 甘树才 唐娟
Key words：chemical materials; barium hexafettite doped rare earths; sol-gel process; phase transformation; mechanism;
Abstract: The phase-transformation in sol-gel preparation of barium hexaferrite and the formation of barium hexaferrite doped with La3+ were studied by chemical phase analysis, X-ray diffraction and infrared spectrometry analysis. The experimental results show that phase transformation reactions of FeCO3, Fe2O3 and BaFe2O4, barium hexaferrite and γ-Fe2O3 take place in the heat treatment of gel. While the doping lanthanide ion replace barium ion, an equivalent quantity of Fe3+ are reduced to Fe2+ to maintain the charge equilibrium.
车平1，张军1，洪广言2，甘树才1，唐娟1
(1.College of Chemistry, Jilin University, Changchun 130026, China;
2.Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China)
Abstract:The phase-transformation in sol-gel preparation of barium hexaferrite and the formation of barium hexaferrite doped with La3+ were studied by chemical phase analysis, X-ray diffraction and infrared spectrometry analysis. The experimental results show that phase transformation reactions of FeCO3, Fe2O3 and BaFe2O4, barium hexaferrite and γ-Fe2O3 take place in the heat treatment of gel. While the doping lanthanide ion replace barium ion, an equivalent quantity of Fe3+ are reduced to Fe2+ to maintain the charge equilibrium.
Key words:chemical materials; barium hexafettite doped rare earths; sol-gel process; phase transformation; mechanism;
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