Fig. 4: Thermal properties of Zr0.75Hf0.25NiSn0.99Sb0.01 samples with relative densities ~ 99.8%, ~ 98.2%, ~ 95.4%, and ~ 90.9%, as labeled D100, D98, D95, and D91, respectively. | Nature Communications

Fig. 4: Thermal properties of Zr0.75Hf0.25NiSn0.99Sb0.01 samples with relative densities ~ 99.8%, ~ 98.2%, ~ 95.4%, and ~ 90.9%, as labeled D100, D98, D95, and D91, respectively.

From: High-performance ZrNiSn-based half-Heusler thermoelectrics with hierarchical architectures enabled by reactive sintering

Fig. 4

a Temperature-dependent κ. b Temperature-dependent κL. c Longitudinal and transverse sound velocities (vl, νt) and sound velocity (νs) at room temperature. d Comparison of κL between porous and non-porous samples. The dash lines were calculated using the modified Debye model. U, PD, GB and NP represent the phonon–phonon Umklapp process, point defect, grain boundary, and nanoprecipitate scattering mechanisms for phonons, respectively. Data for the sample prepared by arc melting is included for comparison31.

Back to article page