Please use this identifier to cite or link to this item:
|Title:||The effects of mechanical activation in synthesizing ultrafine barium ferrite powders from co-precipitated precursors|
|Citation:||Liu, X., Wang, J., Ding, J., Chen, M.S., Shen, Z.X. (2000). The effects of mechanical activation in synthesizing ultrafine barium ferrite powders from co-precipitated precursors. Journal of Materials Chemistry 10 (7) : 1745-1749. ScholarBank@NUS Repository. https://doi.org/10.1039/a909568c|
|Abstract:||Well dispersed and fine barium ferrite (BaFe12O19) powders have been successfully prepared by mechanically activating co-precipitated precursors, followed by calcination at 700 and 800 °C. When mechanically activated in a sodium chloride matrix for 20 hours, nanocrystallites of BaFe12O19, α- Fe2O3 and a spinel (γ-Fe2O3) phase of < 10 nm in size were triggered in the co-precipitated precursor. Single phase barium ferrite platelets 50-100 nm in size were developed upon subsequent calcination at 800 °C for 1 hour. The resulting barium ferrite powder exhibits an intrinsic coercivity ((i)H(c)) of 436.7 kA m-1 and a saturation magnetization (M(s)) of 67.8 A m2 kg-1. These magnetic properties compare favorably with those of the materials derived from conventional calcination of the co-precipitated precursor without prior mechanical activation, which led to very poor powder characteristics.|
|Source Title:||Journal of Materials Chemistry|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 11, 2018
WEB OF SCIENCETM
checked on Jul 3, 2018
checked on Jun 29, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.