Properties of a Melt of the Eutectic Composition
in the NaPO₃Na₂B₄O₇LiF System

N. V. Gus’kova^a, A. S. Sidorov^b, and Yu. P. Udalov^a,*

^aSt. Petersburg State Institute of Technology (Technical University), Moskovskii pr. 26, St. Petersburg, 198013 Russia

*e-mail: udalov@lti-gti.ru

^bJoint Stock Company Saint Petersburg Research and Design Institute “Atomenergoproekt,”
ul. Vtoraya Sovetskaya 9/2a, St. Petersburg, 191036 Russia

Received June 26, 2009

Abstract—Physical (density, viscosity) and thermophysical (heat capacity, thermal conductivity) properties of
a melt of the eutectic composition (wt %) 84NaPO₃ 8Na₂B₄O₇ 8LiF have been investigated. It has been dem-
onstrated that this eutectic mixture is a promising material for the use as a high-temperature heat-transfer agent.

Key words: heat-transfer agent, sodium phosphate, sodium tetraborate, lithium fluoride, eutectic, viscosity,
density

DOI: 10.1134/S1087659610020100

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