02223nas a2200289   4500008004100000022001400041245009600055210006900151260006900220300001200289490000800301520124000309653002301549653002401572653002701596653001901623100001901642700002201661700001801683700001801701700001401719700001701733700002201750700002101772700001601793856012401809       2012                        eng d  a0254-058400aMagnetic properties of nanocrystalline CoFe2O4 synthesized by thermal plasma in large scale0 aMagnetic properties of nanocrystalline CoFe2O4 synthesized by th  aPO BOX 564, 1001 LAUSANNE, SWITZERLANDbELSEVIER SCIENCE SAcDEC  a586-5950 v1373 a<p>The paper reports the large scale synthesis of nanoparticles of CoFe2O4 using thermal plasma reactor by gas phase condensation method. The yield of formation was found to be around 15 g h(-1). The magnetic properties of CoFe2O4, synthesized at different reactor powers, were investigated in view of studying the effect of operating parameters of plasma reactor on the structural reorganization leading to the different cation distribution. The values of saturation magnetization, coercivity and remanent magnetization were found to be influenced by input power in thermal plasma. Although the increase in saturation magnetization was marginal (61 emu g(-1) to 70 emu g(-1)) with increasing plasma power; a significant increase in the coercivity (552 Oe to 849 Oe) and remanent magnetization (16 emu g(-1) to 26 emu g(-1)) were also noticed. The Mossbauer spectra showed mixed spinel structure and canted spin order for the as synthesized nanoparticles. The detailed analysis of cation distribution using the Mossbauer spectroscopy and X-ray photoelectron spectroscopy leads to the conclusion that the sample synthesized at an optimized power shows the different site selective states. (C) 2012 Elsevier B.V. All rights reserved.</p>10aMagnetic materials10amagnetic properties10aMossbauer spectroscopy10aNanostructures1 aNawale, A., B.1 aKanhe, Nilesh, S.1 aPatil, K., R.1 aReddy, V., R.1 aGupta, A.1 aKale, B., B.1 aBhoraskar, S., V.1 aMathe, Vikas, L.1 aDas, A., K.  uhttps://library.ncl.res.in/content/magnetic-properties-nanocrystalline-cofe2o4-synthesized-thermal-plasma-large-scale-002195nas a2200301   4500008004100000022001400041245016600055210006900221260001000290300001200300490000800312520113100320653001501451653002401466653003101490653002701521653001901548100002001567700002501587700001601612700002201628700002101650700002701671700002401698700002501722700002101747856012501768       2018                        eng d  a0304-885300aSingle step, phase controlled, large scale synthesis of ferrimagnetic iron oxide polymorph nanoparticles by thermal plasma route and their rheological properties0 aSingle step phase controlled large scale synthesis of ferrimagne  cMAR 1  a232-2420 v4493 a<p>In this paper we report single step large scale synthesis of highly crystalline iron oxide nanoparticles viz. magnetite (Fe3O4) and maghemite (gamma-Fe2O3) via gas phase condensation process, where micron sized iron metal powder was used as a precursor. Selective phases of iron oxide were obtained by variation of gas flow rate of oxygen and hence partial pressure of oxygen inside the plasma reactor. Most of the particles were found to possesses average crystallite size of about 20-30 nm. The DC magnetization curves recorded indicate almost super-paramagnetic nature of the iron oxide magnetic nanoparticles. Further, iron oxide nanoparticles were analyzed using Raman spectroscopy, X-ray photoelectron spectroscopy and Mossbauer spectroscopy. In order to explore the feasibility of these nanoparticles for magnetic damper application, rheological studies have been carried out and compared with commercially available Carbonyl Iron (CI) particles. The nanoparticles obtained by thermal plasma route show improved dispersion which is useful for rheological applications. (C) 2017 Elsevier B.V. All rights reserved.</p>10aIron oxide10amagnetic properties10aNano-crystalline materials10aRheological properties10aThermal plasma1 aRaut, Suyog, A.1 aMutadak, Pallavi, R.1 aKumar, Shiv1 aKanhe, Nilesh, S.1 aHuprikar, Sameer1 aPol, Harshawardhan, V.1 aPhase, Deodatta, M.1 aBhoraskar, Sudha, V.1 aMathe, Vikas, L.  uhttps://library.ncl.res.in/content/single-step-phase-controlled-large-scale-synthesis-ferrimagnetic-iron-oxide-polymorph