You need JavaScript to view this

Thermal conductivity of molten KNO/sub 3/-NaNO/sub 2/ mixtures measured with wave-front shearing interferometry

Journal Article:

Abstract

The thermal conductivities are estimated from data obtained by wave-front shearing interferomety using available data on the density and the heat capacity. The thermal diffusivities and the thermal conductivities of molten KNO/sub 3/-NaNO/sub 2/ mixtures increase and decrease slightly with a rise of temperature depending on the molar ratio of KNO/sub 3/ to NaNO/sub 2/. They are expressed as linear functions of temperature as shown in Table 3. The results suggest that the ionic melts containing the ions of smaller mass have the larger thermal conductivities. The thermal conductivities of the mixture melts deviate negatively from the additivity. The validity of the proposed theories to the KNO/sub 3/-NaNO/sub 2/ system has been studied in which the effects of mass, melting point, and density on thermal conductivity are taken into account. The formula of heat transfer proposed by Rao is best applicable to the thermal conductivity of the mixture. Our result is well expressed by the following formula, K = 2742.T sub(m)sup(1/2).rho sub(m)sup(2/3)/M sup(7/6), where K is the thermal conductivity, T sub(m) the molting point, rho sub(m) the density at T sub(m), and M the mean mass (averaged molecular weight), while the constant is 2742 instead of 2090 according to Rao.  More>>
Authors:
Iwadate, Yasuhiko; Kawamura, Kazutaka; [1]  Okada, Isao
  1. Tokyo Inst. of Tech. (Japan). Research Lab. of Nuclear Reactor
Publication Date:
Jun 01, 1982
Product Type:
Journal Article
Reference Number:
AIX-14-794858; EDB-84-003909
Resource Relation:
Journal Name: Nippon Kagaku Kaishi; (Japan); Journal Volume: 1982:6
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; MOLTEN SALTS; THERMAL CONDUCTIVITY; THERMAL DIFFUSIVITY; POTASSIUM NITRATES; SODIUM COMPOUNDS; MEASURING METHODS; MELTING POINTS; MIXTURES; ALKALI METAL COMPOUNDS; DISPERSIONS; NITRATES; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POTASSIUM COMPOUNDS; SALTS; THERMODYNAMIC PROPERTIES; TRANSITION TEMPERATURE; 400201* - Chemical & Physicochemical Properties
OSTI ID:
5684055
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: CODEN: NKAKB
Submitting Site:
HEDB
Size:
Pages: 969-976
Announcement Date:

Journal Article:

Citation Formats

Iwadate, Yasuhiko, Kawamura, Kazutaka, and Okada, Isao. Thermal conductivity of molten KNO/sub 3/-NaNO/sub 2/ mixtures measured with wave-front shearing interferometry. Japan: N. p., 1982. Web.
Iwadate, Yasuhiko, Kawamura, Kazutaka, & Okada, Isao. Thermal conductivity of molten KNO/sub 3/-NaNO/sub 2/ mixtures measured with wave-front shearing interferometry. Japan.
Iwadate, Yasuhiko, Kawamura, Kazutaka, and Okada, Isao. 1982. "Thermal conductivity of molten KNO/sub 3/-NaNO/sub 2/ mixtures measured with wave-front shearing interferometry." Japan.
@misc{etde_5684055,
title = {Thermal conductivity of molten KNO/sub 3/-NaNO/sub 2/ mixtures measured with wave-front shearing interferometry}
author = {Iwadate, Yasuhiko, Kawamura, Kazutaka, and Okada, Isao}
abstractNote = {The thermal conductivities are estimated from data obtained by wave-front shearing interferomety using available data on the density and the heat capacity. The thermal diffusivities and the thermal conductivities of molten KNO/sub 3/-NaNO/sub 2/ mixtures increase and decrease slightly with a rise of temperature depending on the molar ratio of KNO/sub 3/ to NaNO/sub 2/. They are expressed as linear functions of temperature as shown in Table 3. The results suggest that the ionic melts containing the ions of smaller mass have the larger thermal conductivities. The thermal conductivities of the mixture melts deviate negatively from the additivity. The validity of the proposed theories to the KNO/sub 3/-NaNO/sub 2/ system has been studied in which the effects of mass, melting point, and density on thermal conductivity are taken into account. The formula of heat transfer proposed by Rao is best applicable to the thermal conductivity of the mixture. Our result is well expressed by the following formula, K = 2742.T sub(m)sup(1/2).rho sub(m)sup(2/3)/M sup(7/6), where K is the thermal conductivity, T sub(m) the molting point, rho sub(m) the density at T sub(m), and M the mean mass (averaged molecular weight), while the constant is 2742 instead of 2090 according to Rao. Whereas the thermal conductivity of pure alkali nitrate correlates linearly with the ultrasonic sound velocity, this relation does not hold in the molten KNO/sub 3/-NaNO/sub 2/ mixture. The additivity rule can be applied to the sound velocity, but not to the thermal conductivity owing to its excess conductivity.}
journal = {Nippon Kagaku Kaishi; (Japan)}
volume = {1982:6}
journal type = {AC}
place = {Japan}
year = {1982}
month = {Jun}
}