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Our previous work identified thermal instability of p-type skutterudite as a primary cause of degradation during thermoelectric generator operation at 650°C. Residual Sb in the microstructure was believed to be the cause of diminished thermal stability, especially above the melting point of Sb (631°C). This work investigated addition of Nb to p-type skutterudite to from NbSb2, thus scavenging elemental...
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