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    • Keywords

       

      Magnetic recording materials; gamma ferric oxide; thermal decomposition

    • Abstract

       

      Optimum conditions and experimental details for the formation of γ-Fe2O3 from goethite have been worked out. In another method, a cheap complexing medium of starch was employed for precipitating acicular ferrous oxalate, which on decomposition in nitrogen and subsequent oxidation yielded acicular γ-Fe2O3. On the basis of thermal decomposition in dry and moist nitrogen,dta, xrd, gc and thermodynamic arguments, the mechanism of decomposition was elucidated. New materials obtained by doping γ-Fe2O3 with 1–16 atomic percent magnesiu, cobalt, nickel and copper, were synthesised and characterized.

    • Author Affiliations

       

      M R Anantharaman1 K Seshan1 S N Shringi1 2 H V Keer1

      1. Department of Chemistry, Indian Institute of Technology, Bombay - 400 076, India
      2. Department of Physics, Indian Institute of Technology, Bombay - 400 076, India
    • Dates

       
  • Bulletin of Materials Science | News

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