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Formation Mechanism of Strontium Hexaferrite Compounds by Complementary Structure and Thermogravimetry Investigations
Xu, L.; H. Z. Wang; Y. Xu; Q. H. Wang; X. H. Ma; Z. Zhou; Y. G. Zou and S. Xing
2017
Source PublicationNanoscience and Nanotechnology Letters
Volume9Issue:4
AbstractStrontium hexaferrite (SrFe12O19) compounds with hexagonal structure are fabricated by sintering the mixture of alpha-Fe2O3 and SrCO3 and ball milling the mixture of alpha-Fe2O3 and SrCO3 followed by heat treatment, respectively. The mechanism of formation of the SrFe12O19 in the two kinds of procedures was investigated by using both thermogravimetry and X-ray diffractometer measurements. It was found that the alpha-Fe2O3 reacted with SrCO3 to form SrFeO2.97 with cubic structure as the mixture was sintered above 750 degrees C firstly and then the SrFeO2.97 reacted with alpha-Fe2O3 to form SrFe12O19 in a sintering temperature ranging from 750 to 960 degrees C. However, the alpha-Fe2O3 reacted with SrCO3 to form Sr-containing Fe3O4 with spinel structure when the mixture was milled for 120 h, while the SrFe12O19 was obtained by annealing the Sr-containing Fe3O4 at 7001000 degrees C. The magnetic properties of the SrFe12O19 produced by the two kinds of procedures were reached. The saturation magnetization and the coercivity of the SrFe12O19 fabricated by ball milling followed by heat treatment were 60.65 emu/g and 5481.1 G, respectively, which were much larger than those of the SrFe12O19 produced by the other procedure. The mechanism leading to that the SrFe12O19 produced by the different methods had different magnetic properties was discussed in the present work.
Indexed Bysci ; ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59351
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Xu, L.,H. Z. Wang,Y. Xu,et al. Formation Mechanism of Strontium Hexaferrite Compounds by Complementary Structure and Thermogravimetry Investigations[J]. Nanoscience and Nanotechnology Letters,2017,9(4).
APA Xu, L..,H. Z. Wang.,Y. Xu.,Q. H. Wang.,X. H. Ma.,...&Y. G. Zou and S. Xing.(2017).Formation Mechanism of Strontium Hexaferrite Compounds by Complementary Structure and Thermogravimetry Investigations.Nanoscience and Nanotechnology Letters,9(4).
MLA Xu, L.,et al."Formation Mechanism of Strontium Hexaferrite Compounds by Complementary Structure and Thermogravimetry Investigations".Nanoscience and Nanotechnology Letters 9.4(2017).
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