Spinel cobalt ferrite by complexometric synthesis

Synthesis and characterisation of pure single-phase CoFe2O4 nanopowder via a simple aqueous solution-based EDTA-precursor route

“…The density was found to increase with increasing sintering temperature. Theoretical density of CoFe 2 O 4 is 5.23 g/cm 3 [19], whereas in this study, a density of 4.89 g/cm 3 was achieved after sintering at 1200 C for 2 h. It is observed that 93.5% of the theoretical density was achieved without the use of sintering aids. This was due to the nanosize of the original CoFe 2 O 4 powder.…”

“…[10][11][12]15,19] or comparable [13,[16][17][18] with other reported methods. Moreover, this method does not require any corrosive reagent like NaOH and any elaborate experimental setup.…”

“…Synthesis routes are commonly used for CoFe 2 O 4 are co-precipitation [10][11][12][13][14], sol-gel [15,16], *Corresponding author. Email: naren70@yahoo.com precursors [17][18][19], reverse micelle [20], microemulsion [21], hydrothermal [22], etc. However, several limitations are associated with these methods which make these processes relatively complex and expensive.…”

Sintering behaviour of cobalt ferrite ceramic

“…However, nano-crystalline cobalt ferrite has recently been reported as a hard magnetic material due to its high coercivity (5400 Oe) as compared with co-ferrite prepared via conventional powder sintering [16]. There has been a surge in research activity into ultrafine cobalt ferrite preparation techniques, in particular the sol-gel method [17][18][19], but also by an emulsion method [20] and by complexometric synthesis [21]. One major driving force for this activity is the potential use of cobalt ferrite as high-density storage media where the ferrite particles must be less than 10 nm to avoid exchange interactions between neighbouring grains [22].…”

Synthesis and Characterization of Transition Metal Ions (Zn, Ni, Mn) Doped Cofe2o4 Nanoparticles

“…The applications of CoFe 2 O 4 are strongly influenced by its magnetic properties. Various preparation techniques have been accordingly developed to produce CoFe 2 O 4 nanoparticles including chemical co-precipitation (Zi et al, 2009, Gnanaprakash et al, 2007, Qu et al, 2006, microemulsion (Li et al, 2003, Mathew et al, 2007, sol-gel method (Monte mayor et al, 2007, He et al,), hydrothermal , solvothermal (Liu et al, 2007), organic precursor method (Rashad et al, 2008, Toksha et al, 2008, ball milling (Chinnasamy et al, 2000, Khedr et al, 2006, forced hydrolysis in a polyol medium (Wang et al, 2008, BenTahar et al, 2008, mechanochemical method (Yang et al, 2004, Shi et al, 2000, sonochemical (Shafi et al, 1997) and complexometric synthesis (Thang et al, 2005).…”