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Publication Detail
A combinatorial nanoprecursor route for direct solid state chemistry: Discovery and electronic properties of new iron-doped lanthanum nickelates up to La 4Ni 2FeO 10 - δ
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Conference Proceeding
  • Authors:
    Alexander SJ, Lin T, Brett DJL, Evans JRG, Cibin G, Dent A, Sankar G, Darr JA
  • Publication date:
  • Pagination:
    176, 181
  • Journal:
    Solid State Ionics
  • Volume:
  • Status:
  • Print ISSN:
We describe a simple nanoprecursor route for direct solid-state combinatorial synthesis and discovery of heterometallic materials compositions which are normally difficult to make in a single step. Using a combinatorial robot (incorporating a continuous hydrothermal reactor), co-precipitated nanoprecursors containing different amounts of La, Ni and Fe oxides were made. These samples were divided into two identical cloned libraries, which were heat-treated to bring about solid-state transformations at either 1348 K or 1573 K for 12 h. In each case, experimental conditions were designed to form the corresponding La 4Ni 3 - xFe xO 10 phases (x = 0.0-3.0) directly without comminution. Such materials are difficult to make without multiple heating and grinding steps. The heat-treated samples from each library were embedded into a wellplate and analysed by powder X-ray diffraction methods in order to elucidate trends in phase behaviour. Several hitherto unknown phase-pure Ruddlesden Popper type La 4Ni 3 - xFe xO 10 compositions were identified and their DC electrical conductivities measured. © 2012 Elsevier B.V.
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