Please use this identifier to cite or link to this item:
Title: NiFe 2O 4 nanoparticles formed in situ in silica matrix by mechanical activation
Authors: Zhou, Z.H. 
Xue, J.M. 
Wang, J. 
Chan, H.S.O. 
Yu, T. 
Shen, Z.X. 
Issue Date: 1-May-2002
Citation: Zhou, Z.H., Xue, J.M., Wang, J., Chan, H.S.O., Yu, T., Shen, Z.X. (2002-05-01). NiFe 2O 4 nanoparticles formed in situ in silica matrix by mechanical activation. Journal of Applied Physics 91 (9) : 6015-6020. ScholarBank@NUS Repository.
Abstract: Nanocrystalline nickel ferrite (NiFe 2O 4) particles were successfully synthesized in situ in an amorphous silica matrix by mechanical activation at room temperature. Phase development in the amorphous precursors, derived via a modified sol-gel synthesis route, with increasing mechanical activation time was studied in detail by employing transmission electron microscopy, x-ray diffraction, and Raman spectroscopy. NiFe 2O 4 nanoparticles of 8.05 nm in mean particle size with a standard deviation of 1.24 nm, which were well dispersed in the silica matrix, were realized by 30 h of mechanical activation. The phase formation of nanocrystalline NiFe 2O 4 particles involves the nucleation of Fe 3O 4 in amorphous silica at the initial stage of mechanical activation, followed by the growth of nickel ferrite by incorporation of Ni 2+ caions into Fe 3O 4. Their magnetic anisotropy, surface spin disorder, and cation distribution are investigated by considering both the strain imposed by silica matrix and the buffer effect during mechanical activation. © 2002 American Institute of Physics.
Source Title: Journal of Applied Physics
ISSN: 00218979
DOI: 10.1063/1.1462853
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Oct 18, 2019


checked on Oct 18, 2019

Page view(s)

checked on Oct 12, 2019

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.