Tolerance factor as the basic criterion in searching for promising oxygen-ion and proton conductors among Ln2-xDxM2O7-δ (Ln = La-Lu; M= Sn, Ti, Zr, Hf; D= Sr, Ca, Mg; x = 0, 0.1) 3+/4+ pyrochlores
Source abstract
Abstract
Abstract A criterion has been proposed for searching for promising solid oxide fuel cell materials among Ln2-xDxM2O7-δ (Ln = La-Lu; M = Ti, Zr, Hf; D = Sr, Ca, Mg; x = 0, 0.1) pyrochlores using a geometric parameter characterizing the pyrochlore structure (tolerance factor G). Analysis of a large amount of experimental oxygen ion and proton conductivity data has made it possible to identify general trends in the behavior of the transport properties of both undoped and doped rare-earth pyrochlores. In the case of the rare-earth titanate, zirconate, and hafnate pyrochlores, the tolerance factor G has been shown to be a good criterion that allows highly conductive compounds to be predicted.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Nuclear materials and radiation effects · Advancements in Solid Oxide Fuel Cells · Advanced Condensed Matter Physics
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