Mg-doped lanthanum gallate

Sr- and Mg-doped lanthanum gallate is a complex system, which experiences phase changes and often co-exists with secondaiy phases. At room temperature, this material has an orthorhombic structure, which transforms to a rhombohedral structure at 445K [39]. Recent investigations [40-41] using high-resolution neutron diffraction have shown that the room... 

LaSrGasOy adopts the melilite structure, which consists of alternating cationic (La/Sr)2 and corner-sharing tetrahedral anionic GasOy layers and features fivefold tunnels that accommodate the eight-coordinate La/Sr as chains of cationsJ This composition is an insulator and was found as a secondary phase in the synthesis of the Sr, Mg-doped lanthanum gallate (LSGM) electrolyte. Rozumek etal. showed that the La/Sr... 

An alternative approach to reduce the operating temperature is to use new electrolyte materials such as scandium doped zirconia (SeSZ), and rare earth doped ceria (RDC) which have the fluorite type stmeture, or lanthanum gallate based oxides such as (La,Sr)(Ga,Mg)03 (LSGM) with perovskite stmeture, all of which have higher ionic conductivities than YSZ. An 1 kW class SOFC stack with (La,Sr)(Ga,Mg,Co)03 electrolyte was demonstrated by the collaboration of Mitsubishi Materials Corp. and The Kansai Electric Power Co., Inc. in 2001,... 

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