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    • Calcium ferrite formation from the thermolysis of calcium tris (maleato) ferrate(III)

      B S Randhawa Kamaljeet Sweety

      Material Synthesis Volume 23 Issue 4 August 2000 pp 305-307

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      https://www.ias.ac.in/article/fulltext/boms/023/04/0305-0307

    • Keywords

       

      Ferrites; thermal decomposition; precursor technique; calcium ferrimaleate

    • Abstract

       

      For preparing calcium ferrite, calcium tris (dmaleato) ferrate(III) precursor was prepared by mixing aqueous solutions of iron(III) maleate, calcium maleate and maleic acid. Various physico-chemical techniques i.e. TG, DTG, DTA, Mössbauer, XRD, IR etc have been used to study the decomposition behaviour from ambient to 900°C and ferrite formation. Three consecutive decomposition steps leading to the formation of α-Fe2O3 and calcium carbonate have been observed at various stages of thermolysis. In the final stage the ferrite, bdCa2Fe2O5, is obtained as a result of solid state reaction between α-Fe2O3 and calcium carbonate at 788°C, a temperature much lower than for ceramic method. The results have been compared with those of the oxalate precursor.

    • Author Affiliations

       

      B S Randhawa1 Kamaljeet Sweety1

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

    • Dates

       
      Published
      August 2000

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