skip to main content
Idioma:
Primo Search
Clear Search Box
Search in: Busca Geral
Busca Avançada
Busca por Índices

Thermochemistry of lanthanum zirconate pyrochlore

Radha, A.V. ; Ushakov, Sergey V. ; Navrotsky, Alexandra

Journal of materials research, 2009-11, Vol.24 (11), p.3350-3357 [Periódico revisado por pares]

New York, USA: Cambridge University Press

Texto completo disponível

Citações Citado por
  • Título:
    Thermochemistry of lanthanum zirconate pyrochlore
  • Autor: Radha, A.V. ; Ushakov, Sergey V. ; Navrotsky, Alexandra
  • Assuntos: Applied and Technical Physics ; Biomaterials ; Calorimetry ; Differential thermal analysis (DTA) ; Inorganic Chemistry ; Materials Engineering ; Materials Science ; Nanotechnology
  • É parte de: Journal of materials research, 2009-11, Vol.24 (11), p.3350-3357
  • Notas: istex:1CEF456D50A5580F21638D3ABC3F835675765478
    ark:/67375/6GQ-QVTLF00V-6
    PII:S0884291400035093
    ArticleID:03509
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: A thermodynamic study was carried out to resolve discrepancies in the enthalpy of formation and related parameters for lanthanum zirconate pyrochlore. The homogeneity field for single phase pyrochlore formation was determined to be ∼33–35 mol% La2O3 at 1500 °C. High-temperature oxide melt drop solution calorimetry was performed in sodium molybdate and lead borate solvents on three compositions ranging from La1.98Zr2.01O7 to La2.07Zr1.95O7. The enthalpy of formation from oxides at 25 °C, ΔH0f,ox, for stoichiometric lanthanum zirconate pyrochlore is −107.3 ± 5.1 kJ/mol, and the standard enthalpy of formation from elements, ΔH0f,el, is −4102.2 ± 6.0 kJ/mol. La2Zr2O7 pyrochlore was found by differential thermal analysis to be stable up to its melting point. The melting point and the fusion enthalpy of La2Zr2O7 pyrochlore were measured as 2295 ± 10 °C and ∼350 kJ/mol, respectively.
  • Editor: New York, USA: Cambridge University Press
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.