Preparation and characterization of nanometric Mn ferrite via different methods

Abstract

The structure and magnetic properties of MnFe(2)O(4) ferrites have been investigated using five different preparation methods, including the ceramic technique, flash combustion, co-precipitation, sol-gel and citrate methods. The characteristics of one sample prepared by different methods have been studied to select the better method, i.e. the one that is the simplest and does not require an elaborate instrumental set-up. The results indicated that the citrate method gives the lowest value for the lattice parameter and particle size (14.1 nm), while the highest values are obtained with the ceramic method. The smallest nanosizes were obtained in the citrate and flash methods (14.1 and 40.7 nm, respectively).

Preparation and Characterization of Nano-Cadmium Ferrite

“…(ii) A decrease in the porous structure of nano--Fe 2 O 3 with respect to -CdFe 2 O 4 , which is correlated to the particle size increase [23], is the result of individual grains coming closer to each other increasing the effective area of grain to grain contact [23]. Figure 4(a) shows the Mössbauer effect (ME) spectrum recorded at room temperature (293 K) for the Fe 2 O 3 sample.…”

Bi-modal improvement of the physico-chemical characteristics of PEG and MFe2O4 subnanoferrite

“…MFe2O4 (M = Mn 2+ , Ni 2+ , Co 2+ and Cu 2+ ) ferrite powders were synthesized by flash auto-combustion reaction [17,18], which involves mixing metallic ions that 0925-8388/$ -see front matter © 2010 Elsevier B.V. All rights reserved. doi:10.1016/j.jallcom.2010.02.009 Table 1 The values of the lattice parameter a (Å) and the crystallite size L (nm) for the MFe2O4 nanoferrite samples; M = Mn 2+ , Ni 2+ , Cu 2+ and Co 2+ .…”

Effect of preparation conditions on the nanostructure of hydroxyapatite and brushite phases

“…Different phases of calcium phosphate nanoparticles (CaP) with different sizes and shapes can be suitable for different purposes (Sørensen and Madsen 2000;Jadalannagari et al 2011;Oliveira et al 2007;Ahmed et al 2008). Several researchers under different preparation conditions studied the synthesis of calcium phosphate extensively (Nilsson et al 2002;Ren et al 2012;Kundu et al 2010a).…”