کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1333553 979082 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamic properties of complex oxides in the La–Ni–O system
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Thermodynamic properties of complex oxides in the La–Ni–O system
چکیده انگلیسی

Complex oxides La2NiO4+δ, La3Ni2O7−δ, La4Ni3O10−δ and LaNiO3−δ, the members of Ruddlesden–Popper series Lan+1NinO3n+1, were prepared using citrate precursors. The stability range of LaNiO3−δ in air as well as the oxygen nonstoichiometry of La3Ni2O7−δ and La4Ni3O10−δ as a function of temperature and oxygen partial pressure was determined by means of thermogravimetric technique. Decomposition temperatures of La3Ni2O7−δ, La4Ni3O10−δ and LaNiO3−δ in air were determined by conductivity measurement method. The boundary of stability for La4Ni3O10−δ was determined by EMF measurements of galvanic cell with oxygen conducting solid electrolyte. The isothermal (1400 K) projection of La–Ni–O system phase diagram to the plane “log(PO2)–relative mole fraction of metal components” was suggested.

The crystal structure of La4Ni3O10.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 179, Issue 8, August 2006, Pages 2721–2727
نویسندگان
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