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1996 (1)
1Author    V. Massarotti, M. Bini, D. CapsoniRequires cookie*
 Title    Structural and Defect Study of LiMn 2 0 4 Formation  
 Abstract    The LiMn 2 0 4 formation from MnO and Li 2 C0 3 mixtures with lithium cationic fraction 0.31 < x < 0.40 was studied by structural profile refinement from X-ray data, thermal (TGA and DSC) measurements and scanning electron microscopy (SEM) observations. Quantitative phase analysis, structural and microstructural parameters and composition of the coexisting phases were obtained. Different behaviours were observed in the composition ranges 0.33 < x < 0.35 and x > 0.37. In the former range only the stoichiometric spinel phase was obtained, in the latter, in addition to the Li 2 Mn0 3 compound, two spinel phases could be considered: I) LiMn 2 0 4 stoichiometric spinel; II) Li i +> Mn2-> .04 (0.11 < y < 0.23), a non-stoichiometric phase whose small particle size resulted practically independent of the initial composition and annealing temperature. Such a conclusion was supported also by SEM observations. The relative abundance of phase II increased with increasing lithium content and with decreasing temperature. 
  Reference    Z. Naturforsch. 51a, 267—276 (1996); received March 3 1996 
  Published    1996 
  Keywords    Solid state reaction, Lithium Manganese Spinel, Structural and microstructural parameters, Non-stoichiometry, Substitutional defects 
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 TEI-XML for    default:Reihe_A/51/ZNA-1996-51a-0267.pdf 
 Identifier    ZNA-1996-51a-0267 
 Volume    51