Crystal structures of praseodymium nitrate complexes with urea, precursors for solution combustion synthesis of nanoscale praseodymium oxides
作者： Elena V. Savinkina , Igor A. Karavaev , Mikhail S. Grigoriev
DOI: 10.1016/J.POLY.2020.114875
关键词: Annealing (metallurgy) 、 Nanoscopic scale 、 Carbonate 、 Inorganic chemistry 、 Combustion 、 Chemistry 、 Crystal structure 、 Praseodymium 、 Nitrate 、 Urea 、 Physical and Theoretical Chemistry 、 Materials Chemistry
摘要: Abstract Complexes of praseodymium nitrate with urea (Ur) can serve as precursors in solution combustion synthesis nanoscale oxides. Two compounds, [Pr(Ur)2(H2O)2(NO3)3] and [Pr(Ur)4(NO3)3], were isolated their crystal structures studied. Combustion congruently soluble [Pr(Ur)4(NO3)3] begins at ~330 °C finishes ~400 °C producing basic carbonate. For preparing Pr6O11 Pr2O3, further annealing higher temperature (>460 °C >770 °C, respectively) is necessary.
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