Listar por tema "Rietveld"

Mostrando ítems 1-3 de 3

    • openAccess   Improvement in varistor properties of CaCu3Ti4O12 ceramics by chromium addition 

      Grzebielucka, Edson; Monteiro, Joao Frederico; Souza, Eder; Borges, Christiane Philippini Ferreira; Chaves de Andrade, André Vitor; Cordoncillo, Eloisa; Beltrán Mir, Héctor; Masetto Antunes, Sandra Regina Elsevier (2019-11-17)
      The effect of chromium addition on the structure and electrical properties of CaCu3Ti4O12 is studied. Compositions based on the formula CaCu3Ti4-xCrxO12-δ (x = 0, 0.025, 0.050 and 0.075 mol%) are prepared by solid-state ...

    • openAccess   Spinel–rock salt transformation in LiCoMnO4−δ 

      Reeves-McLaren, Nik; Sharp, Joanne; Beltrán Mir, Héctor; Rainforth, William; West, Anthony R. The Royal Society (2016)
      The transformation on heating LiCoMnO4, with a spinel structure, to LiCoMnO3, with a cationdisordered rock salt structure, accompanied by loss of 25% of the oxygen, has been followed using a combination of diffraction, ...

    • closedAccess   Structural and optical properties of CaTiO3 perovskite-based materials obtained by microwave-assisted hydrothermal synthesis: An experimental and theoretical insight 

      Moreira, Mario Lucio; Paris, Elaine Cristina; Do Nascimento, G. S.; Longo, V. M.; Sambrano, Julio; Mastelaro, Valmor Roberto; Bernardi, Maria Inês B.; Andres, Juan; Varela, José A.; Longo, Elson Elsevier (2009)
      CaTiO3 powders were synthesized using both a polymeric precursor method (CTref) and a microwave-assisted hydrothermal (CTHTMW) method in order to compare the chemical and physical properties of the perovskite-based material ...