ChemInform Abstract: SURFACE TENSION OF LIQUID SELENIUM, TELLURIUM, AND MELTS OF THE THALLIUM‐TELLURIUM SYSTEM

Kokov, M. B.; Алчагиров, Б. Б.; Zadumkin, S. N.; Khokonov, Kh. B.

doi:10.1002/chin.197820023

Cited by 3 publications

(4 citation statements)

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“…Lang [4] reviewed the studies on the surface tension of molten bismuth based on 13 previous papers in 1973, and Keene [8] reviewed the individual values given in the 16 references for surface tension of molten bismuth in 1993. The results, methods, conditions and the temperature range for the surface tension measurement of molten bismuth are presented in Table 1[1–19] and the surface tension of molten bismuth measured by various investigators are shown in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

“…The reported surface tension and the temperature dependence of molten bismuth have been measured with unknown oxygen partial pressure, and there exists a large difference among the values [1–19]. One of the main reasons for the differences is that the measurement methods and the measurement conditions of surface tension are different, especially the oxygen potentials (the oxygen partial pressure in atmosphere) of measuring system.…”

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Surface tension of molten bismuth at different oxygen partial pressure with the sessile drop method

Yuan

Fan

et al. 2004

Scand Jof Metallurgy

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The surface tension of molten bismuth has been analyzed and determined by the sessile drop method at temperatures ranging from 573 to 973 K and in the oxygen partial pressure (Po2) range from 8.56 × 10−16 to 8.37 × 10−6 MPa. At Po2= 8.56 × 10−16 and 5.23 × 10−13 MPa, the surface tension decreases linearly with the increase in temperature and its temperature coefficients are −0.087 and −0.064 mN/m/K, respectively. However, at high Po2 in argon gas (8.37 × 10−6 MPa, not deoxidized with magnesium chips), the surface tension values and the absolute value of its temperature coefficient are both smaller than that at low Po2 ranging from 8.56 × 10−16 to 5.23 × 10−13 MPa. Based on the review of the surface tension and the temperature coefficient of molten bismuth reported by various investigators, the surface tension obtained by our research is recommended as σ (mN/m) = 382 − 0.076 (T− 544 K). The effect of oxygen in the measurement atmosphere is considered from thermodynamics and kinetics on the basis of a model, and the experimental results can be explained qualitatively.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Surface tension of molten bismuth at different oxygen partial pressure with the sessile drop method

Yuan

Fan

et al. 2004

Scand Jof Metallurgy

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“…The temperature dependence of the surface tension ␥ is included from Ref. 21, although it does not vary by more than 2% over this temperature range.…”

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Capillary-wave roughening of surface-induced layering in liquid gallium

et al. 1996

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The temperature dependence of surface-induced atomic layering in liquid gallium has been investigated with x-ray reflectivity. The prominent layering peak at q z ϭ2.4 Å Ϫ1 decreases dramatically upon heating from 22 to 170°C, but its width stays, unexpectedly, unchanged. The decrease is traced to the temperature dependence of capillary-wave induced surface roughness. The constant width indicates a temperature-independent layering decay length. The measured layering amplitudes are found to be significantly underestimated by existing theory and molecular simulations. ͓S0163-1829͑96͒02337-5͔

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“…Since ⌬␤ is determined by the local radius of curvature (rϳ150 mm͒, the beam height at the sample position (hϳ0.1 mm͒, and incident angle ␣, this leads to k min ϭ2h/(r)ϭ0.0064 Å Ϫ1 , independent of q z . From the Ga surface tension 49 and the experimental resolution, we calculate the capillary wave contribution with 0 ϭ0.37Ϯ0.027 Å, and the other parameters, d and , are unchanged. The reflectivity data are well described over the entire measured temperature range ͑i.e., up to 170°C͒.…”

Section: ͑2͒mentioning

confidence: 99%

X-ray reflectivity studies of liquid metal and alloy surfaces

et al. 1997

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Surface-induced atomic layering at the liquid/vapor interface in liquid metals has been observed using x-ray reflectivity on sputtered clean surfaces under ultrahigh vacuum conditions. A well-defined quasi-Bragg peak is obtained for surfaces of elemental Ga and a Ga-In alloy at large wave vectors q z ϳ2.3-2.5 Å Ϫ1 . These results are an unambiguous indication of atomic layering with an interlayer spacing dϳ2/q z ϭ2.5-2.7 Å. For liquid Ga, the amplitude of the electron-density oscillations, which is significantly underestimated by existing theory and molecular simulation, decays with a characteristic length of 6 Å, which is twice that of Hg. Results on the alloy show a clear enrichment of indium at the topmost surface layer, consistent with the Gibbs adsorption rule. The enrichment consists of a single monolayer, with subsequent layers at the bulk eutectic composition. In order to suppress mechanically excited surface waves, the measurements were performed on thin liquid metal films (Ͻ0.5 mm deep͒, which leads to a macroscopically curved surface due to the large surface tensions in liquid metals. The experimental challenges posed by measurements on curved surfaces and the techniques that were developed are discussed in detail. ͓S0163-1829͑97͒01324-6͔

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ChemInform Abstract: SURFACE TENSION OF LIQUID SELENIUM, TELLURIUM, AND MELTS OF THE THALLIUM‐TELLURIUM SYSTEM

Abstract: Die Kurven für die Temp.‐Abhängigkeit der Oberflächenspannung weisen Besonderheiten auf, die die Strukturumwandlungen in flüssigem Se und Te widerspiegeln.

Cited by 3 publications

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Surface tension of molten bismuth at different oxygen partial pressure with the sessile drop method

Surface tension of molten bismuth at different oxygen partial pressure with the sessile drop method

Capillary-wave roughening of surface-induced layering in liquid gallium

X-ray reflectivity studies of liquid metal and alloy surfaces

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