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Study of the Solid State Reactions between (La,Sr)(Ga,Mg)O3 and (La,Sr)MnO3, (La,Ca)CrO3, and Ni

✍ Scribed by M. Rozumek; P. Majewski; T. Maldener; F. Aldinger


Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
549 KB
Volume
33
Category
Article
ISSN
0933-5137

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✦ Synopsis


The reactions between Sr and Mg substituted LaGaO 3 , Sr substituted LaMnO 3 , Ca substituted LaCrO 3 , and Ni annealed at 650 and 1000 8C for up to 1000 h have been studied. The experiments show that solid state reactions between the original phases occur forming additional compounds, for example LaSrGa 3 O 7 , LaSrGaO 4 , La 4 Ga 2 O 9 , and Ca 2 Ga 2 O 5 . In addition, the chemical composition of LaGaO 3 changes during the heat treatments. At 650 8C significant solubility of Cr and Ca in LaGaO 3 have been observed. The solid solubility of Mn and Ni in LaGaO 3 is moderate.

Das wechselseitige Reaktionsverhalten von Sr-und Mg-dotiertem LaGaO 3 , Sr-dotiertem LaMnO 3 , Ca-dotiertem LaCrO 3 sowie Ni wurde bei Temperaturen von 650 und 1000 8C und fu Èr Zeiten bis zu 1000 h untersucht. Es hat sich gezeigt, dass Festko Èrperreaktionen zwischen den urspru Ènglichen Phasen auftreten und dabei weitere Verbindungen gebildet werden, z.


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