Showing papers on "Binary system published in 1971"
162 citations
TL;DR: Analytical model of eclipsing binary star systems, testing validity through numerical integration error analysis was presented in this paper, where the authors tested validity of the model through numerical integrability analysis.
Abstract: Analytical model of eclipsing binary star systems, testing validity through numerical integration error analysis
102 citations
34 citations
TL;DR: The phase equilibrium relationship in the binary system BaO-CeO2 has been investigated by thermal analysis, metallographic and X-ray diffraction methods as mentioned in this paper, which is characterised by the existence of only one compound, which is found to melt incongruently at 1480±5°C with formation of solid CeO2 and a liquid.
Abstract: The phase equilibrium relationships in the binary system BaO-CeO2 have been investigated by thermal analysis, metallographic and X-ray diffraction methods. The system is characterised by the existence of only one compound, namely, BaCeO3 which is found to melt incongruently at 1480±5°C with formation of solid CeO2 and a liquid. A eutectic is found to occur between BaO and BaCeO3 at 46±0.5 mol% CeO2 and its melting point was determined as 1440±5°C. A narrow solid solubility range of BaO in BaCeO3 exists but no solid solubility of BaCeO3 in either BaO or CeO2 was detected.
31 citations
TL;DR: A method based on the anomalous scattering of either x rays or neutrons has been suggested to separate the partial structure factors in a liquid or amorphous binary system as mentioned in this paper, but this method is not suitable for high-dimensional systems.
Abstract: A method based on the anomalous scattering of either x rays or neutrons has been suggested to separate the partial structure factors in a liquid or amorphous binary system.
30 citations
TL;DR: In this article, the Wilson equation is modified so that it contains only one adjustable constant per binary system, which is inferior to the original Wilson but superior to the Van Laar equation.
Abstract: The Wilson equation is modified so that it contains only one adjustable constant per binary system. In describing binary behavior the new equation is inferior to the original Wilson but superior to the Van Laar equation. In developing ternary behavior from binary data, the new equation seems to be comparable to the original Wilson but definitely superior to the Van Laar equation.
Binary and ternary vapor-liquid equilibrium behavior has been successfully predicted from one γ° value per binary only.
27 citations
TL;DR: In this paper, the Krichevsky-Kasarnovsky equation adequately correlated the solubility data of hydrogen in the liquid phase of the hydrogen-propane system.
Abstract: Vapor-liquid equilibria data for the hydrogen-propane binary system and the hydrogen-carbon monoxide-propane system were taken at temperature of −185° to +75°. and under pressures as high as 3000 psi. Vapor-liquid data for the hydrogen-carbon monoxide-propane system are reported at −50°, 0°, and +50°. at pressures of 500, 1000, and 2000 lb./sq.in. abs. for each of the three temperatures. The Krichevsky-Kasarnovsky equation adequately correlated the solubility data of hydrogen in the liquid phase of the hydrogen-propane system. Hydrogen-propane data are compared with the data of two previous studies.
26 citations
TL;DR: In this paper, the effects on a close binary system of one component becoming a neutron star as a result of a supernova explosion are discussed in the case of a Type I supernova, the system can remain bound in many cases of interest.
Abstract: The effects on a close binary system of one component becoming a neutron star as a result of a supernova explosion are discussed in this paper. In the case of a Type I supernova, the system can remain bound in many cases of interest. For a Type II supernova, the system will probably be disrupted although in some cases a remnant of the companion to the supernova may remain in a bound orbit. Consequently, neutron stars formed in Type I supernova explosions may exist in close binary systems. Such systems may be strong X-ray emitters due to mass flow as suggested by Shklovsky. Photons with energies in the 1–50 MeV region should also be emitted.
25 citations
TL;DR: In this paper, the applicability of the BWR equation for ternary systems was examined and a marked improvement in the equilibria was obtained by introducing correction factors determined from the data of each prediction of each binary system.
Abstract: Vapor-liquid equilibrium data for the nitrogen-methane-carbon dioxide system were measured by static method at -40°C to 0°C and up to 100 atm. The applicability of the BWR equation for this ternary system was examined. A marked improvement in the equilibria was obtained by introducing correction factors determined from the data of each prediction of vapor-liquid binary system.
22 citations
TL;DR: The Li4SiO4-Mg2SiO 4 binary system as discussed by the authors contains a congruently-melting phase, Li2Mg SiO4, which has an Li3PO4-type structure and is isostructural with Li2ZnSi O4 at high temperatures.
Abstract: The Li4SiO4-Mg2SiO4 binary system contains a congruently-melting phase, Li2MgSiO4, which has an Li3PO4-type structure and is isostructural with Li2ZnSiO4 at high temperatures. Li2MgSiO4 and Li4SiO4 exhibit considerable mutual solubility. Slow cooling of their solid solutions causes some exsolution and both phases undergo a series of transformations. More rapid quenching, followed by annealing at lower temperatures, gives rise to several metastable orthosilicate phases. The binary join Li2MgSiO4-Li2ZnSiO4 shows complete solid solution in theγ-phase above 870°C. At lower temperatures, a wide range of compositions, from 0 to ∼ 80% Li2MgSiO4, transforms to aβ-phase. Ternary isothermal sections are shown at 1200, 900 and 700° C. These have extensive areas of Li4SiO4-type and Li2(Zn, Mg)SiO4-type solid solution. Li4SiO4 does not dissolve in either olivine or willemite solid solutions to any appreciable extent.
19 citations
TL;DR: In this article, a cubic phase for the binary system Ln3Sn (Ln La, Ce, Pr, Sm, Ho, Yb) was shown to not participate in the bonding scheme, mainly from the fact that its chemical isomer shift is independent of the carbon content and remains unchanged with respect to the shift in the Ln 3Sn phase.
01 Jan 1971
TL;DR: In this article, the triple Knudsen cell technique was used to measure the activity of titanium in Ti-Mo alloys containing from 30 to 100 at. pct Ti and the regular solution parameter, Ω, which is independent of temperature and composition, was determined to be 2.9±0.7 kcal per mol.
Abstract: The activity of titanium in Ti-Mo alloys containing from 30 to 100 at. pct Ti was measured using the triple Knudsen cell technique. The binary system shows positive deviation from ideality. The regular solution parameter, Ω, which is independent of temperature and composition, was determined to be 2.9±0.7 kcal per mol. This value agrees quite well, with values calculated from the phase diagram, and with those obtained from theoretical calculations.
TL;DR: In this article, a forced recirculation apparatus was used for the determinations of liquid phase activity coefficients and vapour compositions for the ternary system of argon-methane-ethane.
TL;DR: The liquidus curve for the mercury-telluride binary system is given for atomic concentrations of tellurium from 1% to 12% in this article, where the form of the crystal which has been obtained from the solution depends on its concentration.
TL;DR: The derivation of a rigorous (and tight) upper bound on the probability of error in a binary pulse-code modulation (PCM) twin channel optical receiver in the absence of thermal noise is sketches.
Abstract: In this concise paper we sketch the derivation of a rigorous (and tight) upper bound on the probability of error in a binary pulse-code modulation (PCM) twin channel optical receiver in the absence of thermal noise. This result is valid for any binary system, described by Poisson statistics in each of its states, in which the binary decision is based on which state has the larger count. Examples of such systems include polarization modulation, binary pulse position modulation, frequency-shift keying with separate detectors, and differentially-coherent phase-shift keying.
TL;DR: In this paper, a study on the quasi-binary phase diagram between GaAs and GaSb compounds, both of which crystallize in the zinc-blende structure, was carried out by means of differential thermal analysis.
Abstract: A study has been carried out on the quasi-binary phase diagram between GaAs and GaSb compounds, both of which crystallize in the zinc-blende structure. The liquidus and eutectic temperatures were determined by means of differential thermal analysis. Microscopic structures of several alloys were found to consist of primary crystals of the GaAs compound and an eutectic mixture of the GaAs and GaSb compounds. X-ray diffraction profiles indicated that an alloy containing 30 mol% GaAs consists of GaAs and GaSb phases, whose lattice parameters are slightly different from those of the stoichiometric compositions. Thermodynamic calculations were also carried out by using some data determined by the present experiment. These results lead to the conclusion that this quasi-binary system is an eutectic type, whose eutectic point occurs at 3.0mol%
TL;DR: In this paper, the shape of the liquidus curves of the following binary and pseudo-binary sub-systems of the quaternary system CaO-Nb2O5-TiO2-SiO2 have been determined using the customary quench technique as well as hot-stage microscopy.
Abstract: Liquidus curves of the following binary and pseudo-binary sub-systems of the quaternary system CaO-Nb2O5-TiO2-SiO2 have been determined using the customary quench technique as well as hot-stage microscopy: niocalite (10CaO · Nb2O5 · 6SiO2)-perovskite (CaO · TiO2), CaO · Nb2O5-sphene (CaO · TiO2 · SiO2), sphene-pyrochlore (3CaO · Nb2O5 · 3TiO2), 8CaO · 7Nb2O5 · 6TiO2-sphene and 8CaO · 7Nb2O5 · 6TiO2-SiO2. The shape of the curves indicated that only the system niocalite-perovskite was a true binary system and the others were pseudo-binary systems.
Journal Article•
Journal Article•
01 Dec 1971
TL;DR: In this paper, the equations which relate component bulk-to-surface distribution coefficients and surface activity coefficients to bulk composition, partial molal areas, and surface tension are derived for binary liquid systems from fundamental thermodynamic considerations.
Abstract: The equations which relate component bulk-to-surface distribution coefficients and surface activity coefficients to bulk composition, partial molal areas, and surface tension are derived for binary liquid systems from fundamental thermodynamic considerations. The derived relations for bulk-to-surface distribution coefficients and surface activity coefficients apply equally well to both components of the binary systems, and they are valid throughout the entire range of concentrations for simple binary liquid systems. The bulk-to-surface distribution coefficient and surface activity coefficient values are used to identify the capillary active components of binary systems. Also, the limiting values for these parameters and their temperature dependence may be used to establish standard state values for desorption free energies, enthalpies, and entropies for both components of a binary system. The application of the derived relations to several simple binary liquid solutions of organic compounds is considered, the capillary active components are identified, and the variations of bulk-to-surface distribution coefficients and surface activity coefficients with composition are illustrated.
TL;DR: In this paper, it is suggested that the recently discovered variable star HR 6773 is an eclipsing binary system and the spectroscopic evidence in favor of this suggestion is presented.
Abstract: It is suggested that the recently discovered variable star HR 6773 is an eclipsing binary system. The spectroscopic evidence in favor of this suggestion is presented. It is noted that the star is also a visual binary - a face previously known, but incorrectly recorded. Key words: eclipsing binary - visual binary
TL;DR: In this article, the reactions of Al2O3-SiO2 and SiO2-C with carbon by the plasma jet were described for clarifying the conditions suitable for the direct reduction of bauxite.
Abstract: This paper describes the reactions of Al2O3-SiO2, Al2O3-SiO2-Fe2O3 and Bauxite+SiO2 with carbon by the plasma jet for clarifying the conditions suitable to the direct reduction of bauxite.Large amounts of metals and aluminum could be obtained from Al2O3-SiO2-C and Al2O3-SiO2-Fe2O3-C systems having compositions lying on A-B line, in which the point A means 70wt% Al2O3 in Al2O3-C binary system and point B means 80wt% SiO2 in SiO2-C binary system. The maxinum weights of metals and aluminum were obtained in the center of A-B line. The above relation was effective in the direct reduction of bauxite.The reason for obtaining large amounts of metals and aluminum from raw materials having compositions lying on A-B line can qualitatively be explained by the reactions of Al4O4C-Al4C3, Al4C3-SiO2, Al2O3-SiC and SiC-SiO2 system.
TL;DR: In this paper, the BWR equation of state and its modified forms of Edmister and Orye were used to estimate the vapor-liquid equilibrium relations near the critical points of the binary mixture.
Abstract: Vapor-liquid equilibrium behaviors in the critical regions were estimated for the propane-n-butane binary system, using the BWR equation of state and its modified forms of Edmister and Orye.Discussions were focused on the possibility of estimating the vapor-liquid equilibrium relations near the critical points of the binary mixture. The reproducibility of the equation for PVT relations of pure substances in their saturated state was also discussed in some detail for pure propane and n-butane.