Study of formation mechanism of barium hexaferrite by sintering curve

	Study of formation mechanism of barium hexaferrite by sintering curve
其他题名	论文其他题名
	Wang H. Z.; He Q.; Wen G. H.; Wang F.; Ding Z. H.; Yao B.
	2010
发表期刊	Journal of Alloys and Compounds
ISSN	0925-8388
卷号	504 期号:1 页码:70-75
摘要	Barium hexaferrite (BaFe(12)O(19)) with hexagonal structure was fabricated by sintering the mixture of alpha-Fe(2)O(3) and BaCO(3), ball milling of the mixture followed by heat treatment as well as glycin-nitrate method and subsequent heat treatment, respectively. The mechanism of formation of the BaFe(12)O(19) in the three kinds of procedures was investigated by using sintering shrinkage curve and XRD measurements. It was found that the alpha-Fe(2)O(3) reacted with BaCO(3) to form BaFe(2)O(4) with orthorhombic structure as the mixture were sintered above 660 degrees C firstly and then the BaFe(2)O(4) reacted with alpha-Fe(2)O(3) to form BaFe(12)O(19) in a sintering temperature ranging from 770 to 920 degrees C. However, the alpha-Fe(2)O(3) reacted with BaCO(3) to form Ba(x)Fe(3-x)O(4) with spinel structure when the mixture was milled for 80 h, while the BaFe(12)O(19) was obtained by annealing the Ba(x)Fe(3-x)O(4) at 700-1000 degrees C. In the glycin-nitrate procedure, the precursor powders containing alpha-Fe(2)O(3), Fe(3)O(4) and BaFe(2)O(4) were fabricated by self-propagating reaction firstly, and then the single BaFe(12)O(19) was produced by sintering the precursor powders at 1000 degrees C. The magnetic properties of the BaFe(12)O(19) produced by the three kinds of procedures were reached. The saturation magnetization and the coercivity of the BaFe(12)O(19) fabricated by ball milling followed by heat treatment were 47.24 emu/g and 5086.340e, respectively, which were much larger than those of the BaFe(12)O(19) produced by other procedures. The mechanism leading to that the BaFe(12)O(19) produced by the different methods had different magnetic properties was discussed in the present work. Crown Copyright (C) 2010 Published by Elsevier B.V. All rights reserved.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26181
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Wang H. Z.,He Q.,Wen G. H.,et al. Study of formation mechanism of barium hexaferrite by sintering curve[J]. Journal of Alloys and Compounds,2010,504(1):70-75.
APA	Wang H. Z.,He Q.,Wen G. H.,Wang F.,Ding Z. H.,&Yao B..(2010).Study of formation mechanism of barium hexaferrite by sintering curve.Journal of Alloys and Compounds,504(1),70-75.
MLA	Wang H. Z.,et al."Study of formation mechanism of barium hexaferrite by sintering curve".Journal of Alloys and Compounds 504.1(2010):70-75.

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