9781420038903%2Ech34

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1、34Skutterudite-BasedThermoelectrics34.1Introduction...................................................................34-134.2CrystalStructureandBonding.....................................34-2BinaryandTernarySkutterudites†FilledSkutterudites34.3BandStruct

2、ureandLatticeDynamics.........................34-6BinarySkutterudites†FilledSkutterudites34.4TransportPropertiesRelevanttoThermoelectricity...........................................................34-10BinarySkutterudites†FilledSkutterudites34.5Approaches

3、towardFurtherImprovementofFilledSkutterudites...................................................34-12FormingSolidSolutionsofFilledSkutterudites†CtiradUherMultipleFilling†InfluenceofNanometerSizeGrainsUniversityofMichigan34.6Conclusion.......................

4、...............................................34-1334.1IntroductionThermoelectricityoffersareliable,fullysolid-statemeansofcoolingandpowergeneration.Currently,becauseofalowefficiencyofthethermoelectricmaterialsdueprimarilytotheirsmallthermoelectricfigure-of

5、-merit,thermoelectricapplicationscoveronlyanicheareaoftechnology.Althoughingeniousengineeringapproachescouldbroadenthescopeofapplications,thetrueeconomicimpactofthistechnologyisconditionedontheavailabilityofmoreefficientmaterialsthatwouldsignificantlyexceedt

6、heperformanceofthepresent-daystate-of-the-artthermoelectricsbasedonBi2Te3–Sb2Te3alloys,PbTe,andSi–Gesolidsolutions.Overthepast10yearsorso,anintensiveresearcheffortworldwidehasidentifiedseveralnovelthermoelectricsthat,withfurtherdevelopment,couldbringaboutth

7、ebreakthroughandopenupnewhorizonsforawidespreaduseofthermoelectricity.Amongthemostpromisingnovelmaterialsarefilledskutterudites.Anin-depthaccountofthephysical,chemical,and1materialsissuespertainingtoskutteruditeshasbeenpublishedrecently,andtherelevanceof2sk

8、utteruditestothermoelectricitywaspointedout.Thischapterisareviewofthefundamentalstructuralandbondingcharacteristicsthatunderpinbothelectronicandphonontransportpropertiesandmakefilledskutteruditesexcellenttherm