A Thermoelectric Zintl Phase Na 2+ x  Ga 2+ x  Sn 4– x   with Disordered Na Atoms in Helical Tunnels | Zendy

Yamada Takahiro | Zendy; Yamane Hisanori | Zendy; Nagai Hideaki | Zendy

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A Thermoelectric Zintl Phase Na 2+ x Ga 2+ x Sn 4– x with Disordered Na Atoms in Helical Tunnels

Author(s) -

Yamada Takahiro,

Yamane Hisanori,

Nagai Hideaki

Publication year - 2015

Publication title -

advanced materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.201501970

Subject(s) - materials science , crystallite , dimensionless quantity , thermoelectric effect , zintl phase , phase (matter) , crystallography , figure of merit , crystal structure , thermal conductivity , analytical chemistry (journal) , condensed matter physics , thermodynamics , physics , metallurgy , chemistry , chromatography , quantum mechanics , optoelectronics , composite material

A polycrystalline sample of Na 2+ x Ga 2+ x Sn 4– x with x = 0.19 has low thermal conductivities of 0.56 and 0.58 W m −1 K −1 due to static and dynamic positional disorder of Na atoms in the crystal structure and dimensionless figures of merit ( ZT values) values of 0.98 and 1.28 at 295 and 340 K, respectively. The performance is comparable to those of commercial Bi 2 Te 3 ‐based materials.

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