Experimental study on the forced rayleigh scattering method using CO 2 laser (3rd Report, Measurement of molten single carbonates and their binary and ternary mixtures)

Seiji Otsubo, Yuji Nagasaka, Akira Nagashima

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The thermal diffusivities of molten single carbonates (Li 2C03, Na2CO3) and K 2CO3) and their binary and ternary mixtures have been measured in the temperature range up to 1 445 K by the forced Reyleigh scattering method using a CO2 laser. The corrosion resistant material for the sample cell employed is sapphire glass plate, which was chosen through experimental evaluations. The accuracy is estimated to be ±ll% to ±22%, depending on the measured salts. In comparison with the present results converted into thermal conductivity, the previous experimental data show values up to about three times larger, which may be due to the presence of convection and radiation. It is found that the thermal conductivity of molten single carbonates decreases with increasing molecular weight. It is also found that the temperature dependence of the thermal conductivity is weakly positive.

Original languageEnglish
Pages (from-to)806-813
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume64
Issue number619
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

Rayleigh scattering
binary mixtures
Molten materials
Carbonates
Thermal conductivity
carbonates
thermal conductivity
Lasers
lasers
Thermal diffusivity
thermal diffusivity
Sapphire
molecular weight
corrosion
sapphire
convection
Molecular weight
Scattering
Salts
Corrosion

Keywords

  • CO laser
  • Forced rayleigh scattering method
  • Molten salts
  • The rmophysical properties
  • Thermal diffusivity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

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AU - Nagasaka, Yuji

AU - Nagashima, Akira

PY - 1998

Y1 - 1998

N2 - The thermal diffusivities of molten single carbonates (Li 2C03, Na2CO3) and K 2CO3) and their binary and ternary mixtures have been measured in the temperature range up to 1 445 K by the forced Reyleigh scattering method using a CO2 laser. The corrosion resistant material for the sample cell employed is sapphire glass plate, which was chosen through experimental evaluations. The accuracy is estimated to be ±ll% to ±22%, depending on the measured salts. In comparison with the present results converted into thermal conductivity, the previous experimental data show values up to about three times larger, which may be due to the presence of convection and radiation. It is found that the thermal conductivity of molten single carbonates decreases with increasing molecular weight. It is also found that the temperature dependence of the thermal conductivity is weakly positive.

AB - The thermal diffusivities of molten single carbonates (Li 2C03, Na2CO3) and K 2CO3) and their binary and ternary mixtures have been measured in the temperature range up to 1 445 K by the forced Reyleigh scattering method using a CO2 laser. The corrosion resistant material for the sample cell employed is sapphire glass plate, which was chosen through experimental evaluations. The accuracy is estimated to be ±ll% to ±22%, depending on the measured salts. In comparison with the present results converted into thermal conductivity, the previous experimental data show values up to about three times larger, which may be due to the presence of convection and radiation. It is found that the thermal conductivity of molten single carbonates decreases with increasing molecular weight. It is also found that the temperature dependence of the thermal conductivity is weakly positive.

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