TY - JOUR

T1 - Caloric and Transport Properties of the Intermetallic Compound

AU - Agazhanov, A. Sh

AU - Khairulin, A. R.

AU - Abdullaev, R. N.

AU - Nepomnyashchikh, V. A.

N1 - Caloric and Transport Properties of the Intermetallic Compound / A. Sh. Agazhanov, A. R. Khairulin, R. N. Abdullaev, V. A. Nepomnyashchikh // Journal of Engineering Thermophysics. – 2026. – Vol. 35, No. 1. – P. 198-205. – DOI 10.1134/S1810232826010182. – EDN JHMSTH. The study was carried out under the project of the Russian Science Foundation (grant number 23-79-10095), https://rscf.ru/project/23-79-10095/.

PY - 2026/9/4

Y1 - 2026/9/4

N2 - Thermal conductivity and enthalpy increment of the intermetallic compound LiK3Pb4 were measured for the first time using the laser flash method and drop calorimetry in the temperature range up to 1100 K. Based on the measurement results, the specific heat capacity and thermal diffusivity were calculated. It was found that the thermal conductivity of the liquid phase of LiK3Pb4 ranges from 2.5 to 4.3 W/(m K), which is an order of magnitude lower than the values calculated using the additive rule, indicating substantial localization of conduction electrons. This finding correlates well with the hypothesis of the formation and dominance of ionic complexes such as [Pb4]4− in liquid systems of lead with heavy alkali metals. Tables of recommended data for the investigated properties were created across the entire measurement range, together with an estimation of uncertainties in them.

AB - Thermal conductivity and enthalpy increment of the intermetallic compound LiK3Pb4 were measured for the first time using the laser flash method and drop calorimetry in the temperature range up to 1100 K. Based on the measurement results, the specific heat capacity and thermal diffusivity were calculated. It was found that the thermal conductivity of the liquid phase of LiK3Pb4 ranges from 2.5 to 4.3 W/(m K), which is an order of magnitude lower than the values calculated using the additive rule, indicating substantial localization of conduction electrons. This finding correlates well with the hypothesis of the formation and dominance of ionic complexes such as [Pb4]4− in liquid systems of lead with heavy alkali metals. Tables of recommended data for the investigated properties were created across the entire measurement range, together with an estimation of uncertainties in them.

KW - intermetallic compound

KW - ИНТЕРМЕТАЛЛИЧЕСКОЕ СОЕДИНЕНИЕ

UR - https://www.mendeley.com/catalogue/8a4dcc28-d671-37cb-bda6-09be99e192f0/

UR - https://www.scopus.com/pages/publications/105049423675

UR - https://elibrary.ru/item.asp?id=92019533

U2 - 10.1134/S1810232826010182

DO - 10.1134/S1810232826010182

M3 - Article

VL - 35

SP - 198

EP - 205

JO - Journal of Engineering Thermophysics

JF - Journal of Engineering Thermophysics

SN - 1810-2328

IS - 1

ER -