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Thermal Decomposition of Ni(II) and Fe(III) Nitrates and their Mixture

  • M. A. A. Elmasry
  • A. Gaber
  • E. M. H. Khater
Article

Abstract

The thermal decompositions of nickel(II) nitrate hexahydrate and iron(III) nitrate nonahydrate were followed. It was found that the final decomposition products were NiO at 623 K and Fe2O3 at 523 K, respectively. The two salts exhibited only endothermic peaks and a loss in mass until constant mass was attained. The decomposition reactions and the compounds corresponding to each reaction were established. A heating rate of 1 K min-1 revealed several intermediates; higher heating rates shifted the peaks to higher temperatures. The use of an air flow during decomposition shifted the reactions to lower temperatures.

The DTA for the mixed salts was found to be an overlap and the TG a summation of the results for the two individual salts. At 773 K, the decomposition products were composed of three phases: NiO, Fe2O3 and NiFe2O4. When these products were heated to 1773 K, only NiFe2O4 was identified by X-ray diffraction.

Fe(III) nitrate nickel ferrite nickel nitrate thermal decomposition 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • M. A. A. Elmasry
    • 1
  • A. Gaber
    • 2
  • E. M. H. Khater
    • 3
  1. 1.Metallurgy DepartmentN. R. C., Atomic Energy AuthorityCairo
  2. 2.Physics Department, Faculty of ScienceAssiut UniversityAssiut
  3. 3.National Research CenterDokki, GizaEgypt

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