Question: If high electrical conductivity at temperatures above 7 0 0 deg C were the only consideration in selecting a material for a solid oxide

If high electrical conductivity at temperatures above 700\deg C were the
only consideration in selecting a material for a solid oxide fuel cell electrolyte, which
material from Figure 2.30 would you choose? Besides cost, what additional factors
should be considered in the selection of an SOFC electrolyte material?

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