T-P phase diagram of ammonia solid phases I, II and III

2002-01-01
Enginer, Y
Salihoglu, S
Yurtseven, Hasan Hamit
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
135
views
0
downloads
In this study, using the mean field theory, we obtain temperature versus pressure phase diagram for the liquid and solid phases I, II, and III of ammonia. We fit, our phase line equations to the experimentally observed data. There exists good agreement between the theoretical and experimental phase lines.
Phase diagram, Ammonia, Mean field theory
https://hdl.handle.net/11511/57288
MATERIALS CHEMISTRY AND PHYSICS
Department of Physics, Article

Suggestions

T-X phase diagram of (NH4)(2)SO4/H2O
Yurtseven, Hasan Hamit; Sen, S.; Salihoglu, S. (2007-04-01)
Using the mean field theory, we obtain the phase line equations for the liquid-solid I, liquid-solid II and solid I-solid II transitions in (NH4)(2)SO4/H2O. We fit our phase line equations to the experimental T-X phase diagram of this system. Thus, we are able to obtain the temperature and concentration dependencies of the order parameters and the free energies in this system.
T-P Phase Diagram of Nitrogen at High Pressures
Algul, G.; Enginer, Y.; Yurtseven, Hasan Hamit (2018-05-01)
By employing a mean field model, calculation of the T-P phase diagram of molecular nitrogen is performed at high pressures up to 200 GPa. Experimental data from the literature are used to fit a quadratic function in T and P, describing the phase line equations which have been derived using the mean field model studied here for N-2, and the fitted parameters are determined. Our model study gives that the observed T-P phase diagram can be described satisfactorily for the first-order transitions between the ph...
Calculation of the T-X phase diagram for a mixture of liquid crystals
Yurtseven, Hasan Hamit; Salihoglu, S (2000-12-01)
In this study we calculate the T-X phase diagram for a mixture of liquid crystals. In this calculation we use a mean field theory We fit our calculated phase line equations to the experimental data from the literature. There is a very good agreement between our calculated and the experimentally observed phase diagram.
Calculation of a phase diagram for the ice II-V-VItransitions
Tari, O; Yurtseven, Hasan Hamit; Salihoglu, S (2000-12-01)
In this study we calculate the P - T phase diagram of ice II - V - VI using a mean field model. Our calculated phase line equations are fitted to the experimental data from the literature. There is a very good agreement between our calculated and experimentally observed P - T phase diagram of ice II - V - VI.
Temperature dependence of the polarization, dielectric constant, damping constant and the relaxation time close to the ferroelectric-paraelectric phase transition in LiNbO3
Kiraci, A.; Yurtseven, Hasan Hamit (2017-01-01)
We calculate the order parameter (spontaneous polarization) and the inverse dielectric susceptibility at various temperatures in the ferroelectric phase of LiNbO3 for its ferroelectric-paraelectric phase transition (T-C =1260 K) using the Landau phenomenological model. For this calculation, the Raman frequencies of the soft optic mode (TO1) are used as the order parameter and the fitting procedure is employed for both the order parameter and the inverse dielectric susceptibility by means of the observed dat...
Citation Formats
Y. Enginer, S. Salihoglu, and H. H. Yurtseven, “T-P phase diagram of ammonia solid phases I, II and III,” MATERIALS CHEMISTRY AND PHYSICS, pp. 57–61, 2002, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57288.
METU IIS - Integrated Information Service open@metu.edu.tr