Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Stoichiometry, Thermal Stability and Reducibility of Perovskite-Type Mixed Oxide LaBO$_3$ (B = Fe, Co, Ni)

  • Park, Il-Hyun (Department of Chemistry, Sung Kyun Kwan University, Natural Science Campus) ;
  • Lee, Hyung-Pyo (Department of Chemistry, Sung Kyun Kwan University, Natural Science Campus)
  • Published : 1988.10.20
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Abstract

The titled properties on reduction of the perovskite $LaBO_3$ (B = Fe, Co, Ni) have been investigated by means of temperature-programmed reduction, isothermal reduction and X-ray diffraction methods. Nominal composition of $LaFeO_{3.18},\;LaCoO_{3.00}\;and\;LaNiO_{2.92}$ are determined. Reduction reaction of these mixed oxides differed according to B-site transition metal and thermal stability on reduction decreased as following order: $LaFeO_{3.18}$ > $LaCoO_{3.00}$ > $LaNiO_{2.92}$. From the results of isothermal reaction, kinetics on reduction of the perovskite has been discussed in detail.

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