Search Results

You are looking at 1 - 10 of 144 items for :

  • "ternary systems" x
  • Refine by Access: All Content x
Clear All

Abstract  

Thermodynamic investigations of Ga-GeSb0.855 section in the ternary system Ga-Ge-Sb, which is of a practical importance in electric-industry, are presented in this paper. Results of a comparative thermodynamic analysis at 1273 K obtained by Oelsen calorimetry and predicting methods - general solution model and Hajra's method are also given.

Restricted access

the ternary combinations of NIF with HPβCD and PVP. The ternary systems, in different drug to CD to PVP ratios, were prepared by using different methods such as simple physical mixing, kneading, co-evaporation, and microwave irradiation [ 30 ], as

Restricted access

Abstract  

The ternary system CsCl−NaCl−LaCl3 was investigated by means of differential thermal analysis and X-ray powder diffraction analysis. There exists one congruently melting compound, Cs2NaLaCl6, crystallizing with the cubic elpasolite structure. No quasi-binary section exists for the whole system, however three binaries range from the ternary compound Cs2NaLaCl6 to NaCl, CsLa2Cl7 and Cs3LaCl6 resp., dividing the system in three areas of composition: one triangle, Cs3LaCl6−Cs2NaLaCl6−CsLa2Cl7, containing additionally a compound Cs2LaCl5 below 510°C, and the two areas CsCl−NaCl−Cs2NaLaCl6−Cs3LaCl6 and Cs2NaLaCl6−NaCl−LaCl3−CsLa2Cl7, containing a mixed crystal range between LaCl3 and Na3La5Cl18. These areas could be further divided in five triangles, so that the whole system contains six Alkemade triangles.

Restricted access

Abstract  

The rapid determination is reported of the concentrations of K+, Co2+ and Pb2+ in a ternary system. The method used is based on the measurement of the activity of the solution containing a labelled component, and on the determination of the intensity of β-rays back-scattered in the system. Standard curves are drawn, by means of which the unknown concentrations of the components in the ternary system can be established. The precision of the method is between 0.5 and 2%.

Restricted access

Thermodynamic properties of the ternary system MTBE+1-propanol+hexane

Application of different group contribution models and empirical methods

Journal of Thermal Analysis and Calorimetry
Authors: M. M. Mato, S. M. Cebreiro, P. V. Verdes, J. L. Legido, and M. I. Paz Andrade

Summary Experimental excess molar enthalpies and excess molar volumes of the ternary system x 1MTBE+x 21-propanol+(1-x 1-x 2) hexane and the involved binary mixtures have been determined at 298.15 K and atmospheric pressure. Excess molar enthalpies were measured using a standard Calvet microcalorimeter, and excess molar volumes were determined from the densities of the pure liquids and mixtures, using a DMA 4500 Anton Paar densimeter. The UNIFAC group contribution model (in the versions of Larsen et al., and Gmehling et al.) has been employed to estimate excess enthalpies values. Several empirical expressions for estimating ternary properties from experimental binary results were applied.

Restricted access

Experimental and predicted excess molar volumes of the ternary system.

Tert-butylmethylether+1-propanol+heptane at 298.15 K

Journal of Thermal Analysis and Calorimetry
Authors: M. M. Mato, S. M. Cebreiro, P. V. Verdes, A. V. Pallas, J. L. Legido, and M. I. Paz Andrade

Summary Experimental excess molar volumes for the ternary system x 1MTBE+x 21-propanol+(1-x 1-x 2) heptane and the three involved binary mixtures have been determined at 298.15 K and atmospheric pressure. Excess molar volumes were determined from the densities of the pure liquids and mixtures, using a DMA 4500 Anton Paar densimeter. The ternary mixture shows maximum values around the binary mixture MTBE+heptane and minimum values for the mixture MTBE+propanol. The ternary contribution to the excess molar volume is negative, with the exception of a range located around the rich compositions of 1-propanol. Several empirical equations predicting ternary mixture properties from experimental binary mixtures have been applied.

Restricted access

of the phases forming in the ternary system x NH 4 VO 3 + (1 − x )(NH 4 ) 2 HPO 4 + Sb 2 O 3 during thermal treatment. Experimental Ammonium metavanadate NH 4 VO 3 and antimony (III) oxide Sb 2 O 3 , both of

Restricted access

Phase equilibria in the ternary system PbO−P2O5−PbCl2

IV. The partial system Pb5Cl2O4−Pb3Cl2O2−Pb10(PO4)6Cl2

Journal of Thermal Analysis and Calorimetry
Author: Halina Podsiadło

Abstract  

In the ternary system PbO−P2O5−PbCl2, the partial ternary system Pb5Cl2O4−Pb3Cl2O2−Pb10(PO4)6Cl2 was examined by thermal, microscopic, X-ray, dilatometric and IR absorption analyses and its phase diagram was provided.

Restricted access

Abstract  

R-function method for predicting the ternary thermodynamic properties from its binary ones was applied to the ternary system Pb−Bi−Mg. Activities, activity coefficients, partial and integral molar quantities for Pb, Bi and Mg for the quasibinary sections Pb-X (X=B, C, D, E, F) in the investigated ternary system Pb−Bi−Mg calculated by means ofR-function method are given in this paper. Also, it was determined that results obtained byR-function method reach a good agreement with the experimental results obtained by Oelsen calorimetry.

Restricted access

Abstract  

In this paper, Ga-GeSb0.855 section in the ternary system Ga–Ge–Sb was studied using thermodynamic predicting methods by Muggianu and Toop, while characterization of the chosen alloys was done by DTA, X-ray and SEM-EDX method.

Restricted access