A standard reference material for thermal conductivity of semitransparent melts

Golyshev, V. D.; Гоник, М. А.

doi:10.1068/htwu447

Cited by 11 publications

(28 citation statements)

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“…As a result, the reflective capacity of the sample-mirror device is actually measured, and in contrast to the transmission method, the radiation reflected from the sample surface contributes to the signal. The intensity of the radiation reflected from the sample-mirror system, I = R I 0 , is described for crystals by the formula presented in [6], and for melts by the following equation given in [4]:…”

Section: Spectral Absorptivitymentioning

confidence: 99%

“…This method was used at temperatures (100 to 200) K less than the melting point. α was also measured by the method of reflection from a mirror on which the sample is located (MR method [3]). …”

Section: Spectral Absorptivitymentioning

confidence: 99%

“…The spectral absorptivity and thermal conductivity of some melts and crystals at elevated temperatures are available [3][4][5][6]. However, these properties are not available for compound oxides.…”

Section: Introductionmentioning

confidence: 99%

“…In this work the method for measuring the thermal conductivity of matter close to the melting point, proposed earlier by the authors [6,7], will be used.…”

Section: Introductionmentioning

confidence: 99%

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Spectral Absorptivity and Thermal Conductivity of BGO and BSO Melts and Single Crystals

2008

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The present work describes the results of spectral absorptivity, α, and thermal conductivity, λ, studies for compound oxides SiO 20 in molten and monocrystalline states. The data for the spectral absorptivity were obtained by placing the sample onto a mirror and using the transmission method. To obtain the data on the thermal conductivity of crystals, the stationary method of two identical samples was used. The data for the thermal conductivity of melts were obtained by a new stationary relative method in which the thermal conductivity of the crystal is used as a reference. Special attention is focused on numerical and experimental error analysis at high temperature. The studies have shown that α in the range of a transmission band strongly depends on crystal purity. It varies from 0.0005 cm −1 to 0.03 cm −1 for Bi 4 Ge 3 O 12 and reaches 0.15 cm −1 for Bi 4 Si 3 O 12 . It was found that α is significantly greater for melts than for crystals, reaching (150 to 200) cm −1 for the Bi 4 Ge 3 O 12 melt. The thermal conductivity of the melts under investigation was found to be much smaller than that of the corresponding crystals.

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Section: Spectral Absorptivitymentioning

confidence: 99%

Section: Spectral Absorptivitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In this work the method for measuring the thermal conductivity of matter close to the melting point, proposed earlier by the authors [6,7], will be used.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spectral Absorptivity and Thermal Conductivity of BGO and BSO Melts and Single Crystals

2008

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“…Examples for studies of the melt transmission are by [5][6][7]. We describe solutions of these problems and other features of the spectrometer, some of which can be improved.…”

Section: Introductionmentioning

confidence: 97%