Paper Title:

Preparation and Characterization of BaFe12O19 Hollow Nanocrystalline Aggregations

Periodical Advanced Materials Research (Volumes 152 - 153)
Main Theme New Materials and Advanced Materials
Edited by Zhengyi Jiang, Jingtao Han and Xianghua Liu
Pages 121-124
DOI 10.4028/www.scientific.net/AMR.152-153.121
Citation Hai Qing Huang et al., 2010, Advanced Materials Research, 152-153, 121
Online since October, 2010
Authors Hai Qing Huang, Guo Xuan Xiong
Keywords Aggregation, Ferrite, Mesopore Structure, Nanocrystallite, Porous, Sol-Gel (SG)
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Abstract

M-type BaFe12O19 nanocrystalline aggregations were prepared by the citrate sol-gel method, using Fe(NO3)3 and Ba(NO3)2 as raw materials, urea and ethanol as the soft template. The samples were investigated by SEM, TEM, FT-IR, XRD and VSM. SEM and TEM micrographs show the product is hollow nanocrystalline aggregations with microporous. XRD patterns indicate M-type BaFe12O19 aggregations with mesoporous are purity and well crystallinity, the average size of the primary crystals of the aggregations is 48nm. Saturation magnetization and coercivity of the aggregations is 55.3emu/g and 5403Oe, respectively, which are higher than these of previous BaFe12O19 nano-particles reported in the literature.