Structural and thermal properties of ultralow thermal conductivity Ba₃Cu₂Sn₃Se₁₀

Abstract

The thermal properties of Ba3Cu2Sn3Se10 were investigated by measurement of the thermal conductivity and heat capacity. The chemical bonding in this diamagnetic material was investigated using structural data from Rietveld...

Thermal and Electronic Properties of Ba2MnSe3

“…77 The Debye temperature, θ D , can be determined from the low-temperature C p data using the relation θ D = (12π 4 Rn a /5β) 1/3 , where n a is number of atoms per formula unit and β = 3.6 mJ mol −1 K −4 from our fit, resulting in a θ D of 148 K. The average sound speed (υ = 1563 m/s) can be obtained using the relation θ D = υ(h/k B )(3n a N a d/4πM w ) 1/3 , where h is Planck's constant, k B is the Boltzmann constant, N a is Avogadro's constant, d is the density, and M w is the molecular weight. These relatively low υ and θ D values suggest relatively weak bonds 13,51,78 in this compound, resulting in a low κ for Ba 2 MnSe 3 .…”

“…The thermal properties of materials are among the most fundamental, the knowledge of which is essential for any applications of interest, including those outlined above. Moreover, an intrinsically low thermal conductivity, κ, is important for thermoelectric, thermal barrier coating and phase-change memory materials with specific structural features such as weak bonding, , coordination preferences, , lone pair electrons, − the large number of atoms per unit cell, , the superionic transition, − partial occupancy, − and strong anharmonicity, − leading to low κ values. Motivated by these considerations and our ongoing interest in multinary metal chalcogenides, we investigated the thermal and electronic properties of Ba 2 MnSe 3 .…”

Thermal properties of cubic NaSbS2: diffusion dominant thermal transport above the Debye temperature

“…[13][14][15][16][17][18][19] The thermal properties of novel multinary chalcogenides of diverse structure types have been investigated for these applications. [20][21][22][23][24][25][26] Most recently, understanding the thermal properties of solid-state electrolytes has intensified for the development of materials for use in place of liquid electrolytes in Li-ion batteries. This is due to the importance of thermal management in the design and safety of solid-state batteries.…”