What is the thermal conductivity of PTFE?
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64 Citations | We conclude that the thermal conductivity is estimated with a precision better than 5% and that the precision of the thermal diffusivity estimation depends on the density of the material. |
12 Citations | The measurements show that both purity and thermal treatment strongly influence the value of thermal conductivity. |
30 Citations | We show that thermal conductivity is critical factor in the performance of thermoelectric materials including the efficiency. |
23 Jul 2019 41 Citations | The results proved that the thermal conductivity can be improved substantially by... |
204 Citations | The theoretical thermal conductivity is in good agreement with the experimental measurements. |
19 Citations | Results show that a good estimation on the thermal conductivity can be obtained with any arbitrary initial guesses of the thermal conductivity. |
The obtained thermal conductivity agrees well with the measurements. | |
174 Citations | Moreover, excellent estimations on the thermal properties can be obtained when a good initial guess of either thermal conductivity or heat capacity is given before the inverse calculations. |
54 Citations | Results are in good agreement with the expected thermal conductivity. |
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What is the thermal conductivity of TlInTe2?5 answersThe thermal conductivity of TlInTe2 is found to be extremely low, with values as low as 0.37 W m−1 K−1 at room temperature. This low thermal conductivity is attributed to the weak bonding stiffness and strong phonon anharmonicity in TlInTe2, which leads to reduced phonon-phonon scattering and decreased lattice thermal conductivity. The lattice dynamics of TlInTe2 have been investigated using THz time-domain spectroscopy, revealing increased phonon anharmonicity in the commensurate phase. The low thermal conductivity of TlInTe2 is also attributed to the rattling dynamics of weakly bound Tl cations, which cause large displacements along the c-axis. The microscopic mechanism of the ultralow thermal conductivity in TlInTe2 is explained by considering contributions from particle-like propagation and wave-like tunneling of phonons, as well as quartic anharmonicity.