Elena-Adriana Perianu, Ioana Aurelia Gorodea, Felicia Prihor, Liliana MitoSeriu,Adelina Carmen Ianculescu, Alexandra Raluca Iordan, Mircea Nicolae Palamaru<br>Preparation by Citrate Combustion and Characterization <br>of Complex Oxides Ca2-xLaxMnMoO6

Elena-Adriana Perianu, Ioana Aurelia Gorodea, Felicia Prihor, Liliana MitoSeriu,Adelina Carmen Ianculescu, Alexandra Raluca Iordan, Mircea Nicolae Palamaru
Preparation by Citrate Combustion and Characterization
of Complex Oxides Ca2-xLaxMnMoO6

Abstract:

The aim of this work is to understand the behaviour of the perovskite-type complex oxides Ca2-xLaxMnMoO6 obtained by the combustion synthesis method. We have prepared our samples of nanosized perovskite-type complex oxides Ca2-xLaxMnMoO6 (x=0.75; 0.9; 1.0) by combustion method. The starting materials were CaCO3, La2O3, (NH4)6Mo7O244H2O, Mn powder and citric acid in stoichiometric ratio. The precursors were pre-sintered and sintered at different temperatures. The obtained powders were firstly characterized by infrared spectrophotometry. The infrared spectra have revealed several novel aspects of the structure. The position of bands are attributed around 800 cm-1 and in the ranges of 670 - 590 cm-1, 445 - 431 cm-1, respectively: the results indicate that all nanosized materials have perovskite-type structure complex oxides. The complex impedance properties have also been determined and they are discussed in relationship with their compositions. The Ca2-xLaxMnMoO6 double perovskites are interesting systems for important potential applications. Keywords: perovskites, sol-gel preparation, X-ray techniques, electrical properties

Issue: 2010, Volume 61, Issue 3

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