Thermal property and lattice thermal conductivity of three-dimensional pentagonal silicon

Microstructure Evolution and Performance Improvement of Silicon Carbide Ceramics via Impregnation Method

“…The existence of defects and grain boundaries will interfere with lattice vibration and lead to the reduction of the thermal conductivity of ceramics. As reported by Li [ 38 ] and Du [ 39 ], the thermal conductivity of SiC and Si was 490 and 145 W/(m·K), respectively. From the analysis above, it can be seen that the defects and the content of SiC are the highest in S3, but the thermal conductivity of S3 is still the highest, indicating that the thermal conductivity is primitively determined by the composition of RB-SiC in this study.…”

A penta-silicene nanoribbon-based 3D silicon allotrope with high carrier mobility and thermoelectric performance

“…The κ L values of cco-Si 48 are an order of magnitude lower than those of diamond silicon (146 W m −1 K −1 ) 49 and are lower than those of some recently reported 3D silicon allotropes. 50–52…”

“…The k L values of cco-Si 48 are an order of magnitude lower than those of diamond silicon (146 W m À1 K À1 ) 49 and are lower than those of some recently reported 3D silicon allotropes. [50][51][52] The decrease in the k L of cco-Si 48 with respect to that of the diamond silicon can be attributed to its weakened harmonicity and enhanced anharmonicity. The harmonicity can be represented by the group velocity (v g ) and the weighted three-phonon phase space (WP 3 ), which are obtained directly from the phonon dispersion.…”