Showing papers on "Miscibility published in 1974"
TL;DR: In this article, the miscibility gap boundaries of Li2O and Na2O-SiO2 binaries are described by modified regular-mixing equations based on the concept that the thermodynamic mixing processes are controlled by complex but discrete molecular structures which exist in the melt.
Abstract: Measurements of the miscibility gaps in the Li2O- and Na2O-SiO2 binaries are reported and compared to data of other workers. Heat treatments by brief immersion in liquid Sn were used for measuring the properties of glasses with a strong devitrification tendency. The miscibility-gap boundaries of both systems are successfully described by modified regular-mixing equations based on the concept that the thermodynamic mixing processes are controlled by complex but discrete molecular structures which exist in the melt. The assumptions and implications of the model are discussed.
175 citations
TL;DR: In this paper, the mutual solubilities of Li-LiCl and Li−LiCl-KCl systems were determined both in liquid-liquid and solid-liquid equilibrium regions.
Abstract: The mutual solubilities of Li–LiCl and Li–LiCl–KCl systems were determined both in liquid-liquid and solid-liquid equilibrium regions. No critical solution temperature was observed for Li–LiCl system. The enthalpy of solution of LiCl in Li was estimated and compared with those for other alkali metal-alkali halides.
34 citations
01 Jan 1974-Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
TL;DR: A thermodynamic approach based on the regular solution concept is applied to the description of miscibility gap boundaries in the alkali-borate systems, and it is suggested that in each system the structural units which control the entropy of mixing are the stoichiometric compounds at the apparent limit of the alkalo-rich edge of the gap, and a complex boron trioxide structure.
Abstract: A thermodynamic approach based on the regular solution concept is applied to the description of miscibility gap boundaries in the alkali-borate systems. It is suggested that in each system the structural units which control the entropy of mixing are the stoichiometric compounds at the apparent limit of the alkali-rich edge of the gap, and a complex boron trioxide structure. (The former is inferred by the shape of the gap, and the latter is chosen to fit the regular mixing equation.) The same boron trioxide complex is used for all the systems analyzed. The physical implications of this analysis are discussed.
29 citations
IBM1
TL;DR: In this article, a smooth relationship is obtained when the excess free energy of mixing parameter,, is plotted against the relative difference in the lattice parameters of the two components of a number of miscible III-V pseudobinary semiconductor alloys.
Abstract: A smooth relationship is obtained when the excess free energy of mixing parameter, , is plotted against the relative difference in the lattice parameters of the two components of a number of miscible III–V pseudobinary semiconductor alloys. Extrapolation of this plot to values of the size disparity in systems for which experimental phase diagram information is lacking gives estimates of sufficiently large to predict miscibility gaps in the , , , and systems, when the thermodynamic criterion for phase separation, , is employed. A cutoff point for miscibility across the entire phase diagram appears to occur at a relative lattice parameter difference of about 7.5%, the value for . This same relative difference is found to divide miscible from immiscible II–VI zinc blende alloys as well.
24 citations
TL;DR: In this article, the upper and lower critical solution temperatures for polyethylene solutions in n-butyl acetate and n-amylacetate were determined for a molecular weight range of M η = 1·36 × 10 4 to 17·5 × 104.
23 citations
22 citations
18 citations
TL;DR: In this paper, a thermodynamic treatment is developed which permits the evaluation of the effect of the strain energy on the critical temperature of phase separation in the case of thin-film catalysts.
11 citations
Patent•
03 Sep 1974
TL;DR: In this article, stable aqueous emulsions of acrylate polymers, methacrylate polymer, or butadiene polymers are prepared by emulsion polymerization in the presence of hydrolyzed vinyl acetate-alkali metal olefinsulfonate copolymer as an emulsifier.
Abstract: Stable aqueous emulsions of acrylate polymers, methacrylate polymers or butadiene polymers, which are prepared by emulsion polymerization in the presence of hydrolyzed vinyl acetate-alkali metal olefinsulfonate copolymer as an emulsifier. The aqueous emulsions thus prepared have excellent properties in storage stability, viscosity stability, dilution stability, freeze-thaw stability and miscibility with pigment or urea resin. The emulsion can also give a film excellent in water-resistance.
10 citations
Patent•
01 Apr 1974TL;DR: Water is separated from aqueous mixtures of organic and inorganic compounds by contacting the mixture against a first surface of a polymeric membrane selectively permeable to water, contacting the second surface of the membrane with a sweep liquid having a thermally dependent water miscibility as mentioned in this paper.
Abstract: Water is separated from aqueous mixtures of organic and inorganic compounds by contacting the aqueous mixture against a first surface of a polymeric membrane selectively permeable to water, contacting the second surface of the membrane with a sweep liquid having a thermally dependent water miscibility, withdrawing a water enriched miscible sweep liquid from the second surface, and forming a water rich phase and a sweep liquid phase through the thermal adjustment of the withdrawn water-enriched miscible sweep liquid. The water miscible sweep liquid is selected from those liquids having normal or inverted thermal miscibility for water and which allow for the thermal separation of a water-rich liquid phase.
10 citations
TL;DR: In this paper, the miscibility gap boundaries of Li2O and Na2O-SiO2 binaries are described by modified regular-mixing equations based on the concept that the thermodynamic mixing processes are controlled by complex but discrete molecular structures which exist in the melt.
Abstract: Measurements of the miscibility gaps in the Li2O- and Na2O-SiO2 binaries are reported and compared to data of other workers. Heat treatments by brief immersion in liquid Sn were used for measuring the properties of glasses with a strong devitrification tendency. The miscibility-gap boundaries of both systems are successfully described by modified regular-mixing equations based on the concept that the thermodynamic mixing processes are controlled by complex but discrete molecular structures which exist in the melt. The assumptions and implications of the model are discussed.
TL;DR: In this article, the mutual solubilities of Li-LiCl and Li−LiCl-KCl systems were determined both in liquid-liquid and solid-liquid equilibrium regions.
Abstract: The mutual solubilities of Li–LiCl and Li–LiCl–KCl systems were determined both in liquid-liquid and solid-liquid equilibrium regions. No critical solution temperature was observed for Li–LiCl system. The enthalpy of solution of LiCl in Li was estimated and compared with those for other alkali metal-alkali halides.
TL;DR: In this article, a mixture of C5 to C9 aliphatic dicarboxylic acids with o-terphenyl was studied. But the authors focused on the critical solution temperatures and critical compositions for mixtures of these acids.