Chemistry of interactions in the La2O3-MO(MCO3)-Mn2O3, M = Ca, Sr, Ba, Cd systems

✍ Scribed by B.V. Slobodin; L.L. Surat; V.G. Vassiliev; G.P. Schveikin; A.P. Nossov

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 307 KB
• Volume: 35
• Category: Article
• ISSN: 0992-4361
• DOI: 10.1016/s0992-4361(98)80190-2

✦ Synopsis

The sequence of phase transitions in the system La,O3-MO(MCO~)-Mn2Os, (M=Ca~ Sr, Ba, Cd) and the span range of Lal.xMxMnO~,~ solid solutions formed were studied. It is demonstrated that interaction begins at 650°C due to formation of divalent metal manganites. Just simultmaeously as a result of oxidation-reduction processes and structural transformations the synfl~esis of small quantities of solid solutions takes place, which is kinetically favoured in the case of smaller divalent metal cations. The chemical transformation finishes at 1200°C The values of x at all systems are near 0,35. The absence of CdMnO~ composition in the system CdO-MnO is proved.