scholarly journals Thermodynamic Modeling of Multicomponent Rare Earth Nitrates Aqueous Systems

2021 ◽  
Vol 95 (12) ◽  
pp. 2394-2404
Author(s):  
A. V. Dzuban ◽  
A. A. Galstyan ◽  
N. A. Kovalenko ◽  
I. A. Uspenskaya
Keyword(s):  
Rare Earth ◽  
Phase Diagrams ◽  
Thermodynamic Modeling ◽  
Wide Temperature Range ◽  
Interparticle Interaction ◽  
Experimental Uncertainty ◽  
Solution Properties ◽  
Aqueous Systems ◽  
Rare Earth Nitrates ◽  
Crystalline Hydrates

Abstract Solubility constants of rare earth (RE) nitrates crystalline hydrates are determined in a wide temperature range (−30 to 120°C), salts solubilities and phase diagrams of water–RE nitrate systems are calculated. For multicomponent (n > 5) solutions of RE nitrates the assessment of solution properties as well as phase diagrams are shown to be feasible within experimental uncertainty. In case of mixtures of RE nitrates with similar hydrodynamic radii of ions, the parameters of RE1–RE2 interparticle interaction can be ignored without losing accuracy of thermodynamic modeling.

Rare earth sulfates in aqueous systems: Thermodynamic modeling of binary and multicomponent systems over wide concentration and temperature ranges

2019 ◽  
Vol 131 ◽  
pp. 49-79 ◽  
Author(s):  
Gaurav Das ◽  
Malgorzata M. Lencka ◽  
Ali Eslamimanesh ◽  
Peiming Wang ◽  
Andrzej Anderko ◽  
...  
Keyword(s):  
Rare Earth ◽  
Thermodynamic Modeling ◽  
Multicomponent Systems ◽  
Aqueous Systems ◽  
Temperature Ranges

Rare earth magnets for applications over a wide temperature range

1993 ◽  
Vol 124 (3) ◽  
pp. 325-329 ◽  
Author(s):  
M. Hasegawa ◽  
K. Uchida ◽  
Y. Nozawa ◽  
M. Endoh ◽  
S. Tanigawa ◽  
...  
Keyword(s):  
Rare Earth ◽  
Wide Temperature Range ◽  
Temperature Range

Synthesis, Spectral Characterization and Luminescent Properties of Ternary Rare Earth Nitrates Complexes with 2-Acetylpyridine-tris(2-aminoethyl)amine and Pyridine-N-oxide Ligand

2011 ◽  
Vol 322 ◽  
pp. 337-340
Author(s):  
Lian Cai Du
Keyword(s):  
Thermal Analysis ◽  
Rare Earth ◽  
Luminescent Properties ◽  
Ternary Complexes ◽  
Molar Conductivity ◽  
Lanthanide Ions ◽  
Fluorescent Properties ◽  
Tripodal Ligand ◽  
Rare Earth Nitrates ◽  
The Eu

A tripodal ligand, 2-acetylpyridine-tris(2-aminoethyl)amine (L), pyridine-N-oxide and their ternary complexes with rare earth nitrates have been synthesized. These new complexes with the general formula of Ln·L·PyNO·(NO3)3·nH2O (where Ln = La, Nd, Tb, Pr, Eu, n = 1~3 ) were characterized by elemental analysis, IR spectra, thermal analysis and molar conductivity. All the complexes are stable in air. The results show that the lanthanide ions in each complex are coordinated by nitrogen atoms of the ligand, oxygen atoms of PyNO and the nitrates. The fluorescent properties of the Eu(III) and Tb(III) complexes in solid were investigated.

Phase Equilibria in a Liquid Metal of Fe-La-Ce-O System at 1600 °С

2020 ◽  
Vol 299 ◽  
pp. 468-474 ◽  
Author(s):  
Gennady G. Mikhailov ◽  
L.A. Makrovets ◽  
O.V. Samoilova
Keyword(s):  
Rare Earth ◽  
Liquid Metal ◽  
Phase Equilibria ◽  
Phase Diagrams ◽  
Liquid Iron ◽  
Rare Earth Metals ◽  
Liquid Oxygen ◽  
Oxide Systems ◽  
Calculation Technique ◽  
Steelmaking Technology

Thermodynamic modeling of phase equilibria in a liquid metal of Fe–La–Ce–O system at 1600 °С, using the technique of constructing the solubility surfaces for the components of a metal, was carried out. The calculation technique allowed assessing the depth of liquid iron de-oxidation at a complex use of lanthanum and cerium as deoxidizing agents. Also, diagrams of de-oxidants’ consumption for one ton of liquid oxygen-containing iron were calculated in the course of the work. Carrying out a calculation of the solubility surfaces for the components of a metal required simulation of phase diagrams of the following oxide systems: FeO–La2O3–Ce2O3, FeO–CeO2–La2O3, CeO2–La2O3–Ce2O3. The obtained results might be of interest for optimization of the use of rare-earth metals in steelmaking technology.

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