Enhancement of thermoelectric performance of ball-milled bismuth due to spark-plasma-sintering-induced interface modifications.
basic_science · Level V
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- Record sourced from PubMed, PMID 23239166.
- Also identified by DOI 10.1002/adma.201204010.
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Abstract
Interface modification in transport properties of single elemental polycrystalline Bi via spark plasma sintering results in 'double-decoupling' (simultaneous decoupling of thermopower, electrical, and thermal conductivity) of otherwise coupled entities. In spark plasma sintering, the DC pulse current helps in controlling the nature and extent of surfaces of ball-milled Bi and hence results in six-fold improvement in the dimensionless figure of merit (ZT) relative to as-purchased samples.