Synthesis and Transport Properties of Polycrystalline Co-Filled Type-I Clathrate Compound (Sr,Ba)8Ga16Ge30

Li Wang; De Gang Zhao; Xiao Ya Shi; Wan Jiang; Li Dong Chen

doi:10.4028/www.scientific.net/MSF.610-613.441

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HomeMaterials Science ForumMaterials Science Forum Vols. 610-613Synthesis and Transport Properties of...

Synthesis and Transport Properties of Polycrystalline Co-Filled Type-I Clathrate Compound (Sr,Ba)₈Ga₁₆Ge₃₀

Abstract:

Ga-substituted Ge based type-I clathrates with the general formula A8X16Y30 display promising thermoelectric performance. Using high purity elemental Sr, Ba, Ga, and Ge as starting materials, polycrystalline co-filled type-I clathrate compound (Sr,Ba)8Ga16Ge30 were successfully achieved by combining melting and Spark Plasma Sinter (SPS) method. The temperature dependence of thermal conductivity, electronic conductivity and Seebeck coefficient were reported. The calculated ZTmax is 0.28 at 700K. Enhanced thermoelectric performance would be expected through adjusting Sr/Ba ratio and framework atoms.