Preparation of Nickel Ferrite from thermolysis of Nickel Hexa(Formato)-Ferrate(III)Hexahydrate

B.S. Randhawa; R. Singh

doi:doi:10.1051/jp4:1997125

Numéro		J. Phys. IV France Volume 07, Numéro C1, Mars 1997 7th INTERNATIONAL CONFERENCE ON FERRITES


Page(s)		C1-89 - C1-90
DOI		https://doi.org/10.1051/jp4:1997125

7th INTERNATIONAL CONFERENCE ON FERRITES

J. Phys. IV France 07 (1997) C1-89-C1-90
DOI: 10.1051/jp4:1997125

Preparation of Nickel Ferrite from thermolysis of Nickel Hexa(Formato)-Ferrate(III)Hexahydrate

B.S. Randhawa and R. Singh

Department of Chemistry, Guru Nanak Dev University Amritsar 143 005, India

Abstract
Thermal decomposition of nickel hexa(formato) ferrate(III) decahydrate i.e. Ni₃[Fe(HCOO)₆]₂.10H₂O has been studied upto 973 K in static air atmosphere employing TG,DTG,DTA,DSC,XRD,ESR, Mössbauer and infrared spectroscopic techniques. Dehydration occurs in two stages in the temperature range of 348-423 K. Immediately after the removal of the last water molecule, the anhydrous complex undergoes decomposition till α-Fe₂O₃ and nickel carbonate are formed at 588 K. In the final stage of remixing of cations, a solid state reaction between α-Fe₂O₃, and nickel carbonate leads to the formation of NiFe₂O₄, at a temperature (873 K) much lower than for ceramic method. A high value of saturation magnetization i.e. 4440 gauss of the ferrite (NiFe₂O₄) shows its potential to function at high frequencies.