Volume 34, Issue 2 (Journal of Advanced Materials- Summer 2015)
2015, 34(2): 61-69 |
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Iran University of Science and Technology, Tehran, Iran , mirkazemi@iust.ac.ir
Abstract: (10407 Views)
In this investigation, the effect of heat treatment on magnetic properties of glass and nano-structured cobalt-ferrite glass-ceramic was studied. The glass was synthesized in the system of Na2O-Fe2O3-CoO-B2O3-SiO2. Based on DTA results, heat treatment was done at different times and temperatures. X-ray diffraction pattern of glass-ceramic showed the crystallization of CoFe2O4 and some nonmagnetic phases. The highest magnetization of 11.8 emu/g was obtained for the sample heat-treated for 2 hr at 670C in graphite bed. Average crystallite size of CoFe2O4 in this sample was 50 nm. Scanning Electron Microscopy (SEM) confirmed the formation of cobalt ferrite nanoparticles in the glass matrix.
Type of Study: Research |
Subject:
Surface engineering and coatings
Received: 2015/09/2 | Accepted: 2015/09/2 | Published: 2015/09/2
Received: 2015/09/2 | Accepted: 2015/09/2 | Published: 2015/09/2