Ba6−3x Nd8+2x Ti18O54 Tungsten Bronze: A New High-Temperature n-Type Oxide Thermoelectric

02 engineering and technology Molecular dynamics 530 01 natural sciences Modelling Titanate [CHIM] Chemical Sciences 0103 physical sciences [CHIM.CRIS]Chemical Sciences/Cristallography Materials Chemistry [CHIM]Chemical Sciences [CHIM.CRIS] Chemical Sciences/Cristallography Electrical and Electronic Engineering [CHIM.MATE] Chemical Sciences/Material chemistry Oxide ceramic Thermoelectric [CHIM.MATE]Chemical Sciences/Material chemistry 540 Condensed Matter Physics 16. Peace & justice Electronic, Optical and Magnetic Materials [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry [CHIM.THEO] Chemical Sciences/Theoretical and/or physical chemistry TA Thermal conductivity Tungsten bronze 0210 nano-technology
DOI: 10.1007/s11664-015-4275-6 Publication Date: 2015-12-30T09:40:18Z
ABSTRACT
Semiconducting Ba6−3x Nd8+2x Ti18O54 ceramics (with x = 0.00 to 0.85) were synthesized by the mixed oxide route followed annealing in a reducing atmosphere; their high-temperature thermoelectric properties have been investigated. In conjunction with experimental observations, atomistic simulations performed investigate anisotropic behavior of lattice thermal conductivity. The show promising n-type relatively high Seebeck coefficient, moderate electrical conductivity, and temperature-stable, low conductivity; For example, composition 0.27 (i.e., Ba5.19Nd8.54Ti18O54) exhibited coefficient S 1000K 210 µV/K, conductivity σ 60 S/cm, k 1.45 W/(m K), leading ZT value 0.16 at 1000 K.
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