Combining two redox active rare earth elements for oxygen storage – electrical properties and defect chemistry of ceria–praseodymia single crystals

2017 ◽  
Vol 19 (27) ◽  
pp. 17661-17669 ◽  
Author(s):  
Kathrin Michel ◽  
Jens-Peter Eufinger ◽  
Gregor Ulbrich ◽  
Martin Lerch ◽  
Juergen Janek ◽  
...  
Keyword(s):  
Rare Earth ◽  
Electrical Properties ◽  
Rare Earth Elements ◽  
Electrochemical Properties ◽  
Single Crystals ◽  
Reference Data ◽  
Oxygen Storage ◽  
Redox Active ◽  
System P ◽  
Bulk System

The electrochemical properties of (Ce,Pr)O2 single crystals were characterized to obtain reference data for the bulk system.

Electrical, magnetic, and magneto-electrical properties in quasi-two-dimensional K0.58RhO2 single crystals doped with rare-earth elements

2014 ◽  
Vol 105 (6) ◽  
pp. 062408 ◽  
Author(s):  
Bin-Bin Zhang ◽  
Song-Tao Dong ◽  
Shu-Hua Yao ◽  
Y. B. Chen ◽  
Shan-Tao Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Electrical Properties ◽  
Rare Earth Elements ◽  
Single Crystals ◽  
Two Dimensional

Microstructure and Electrical Properties of ZnO-Pr6O11-Dy2O3-Based Varistor Ceramics Doped with La2O3

2007 ◽  
Vol 336-338 ◽  
pp. 680-683
Author(s):  
Jing Nan Cai ◽  
Yuan Hua Lin ◽  
Rong Juan Zhao ◽  
Ce Wen Nan ◽  
Jin Liang He
Keyword(s):  
Rare Earth ◽  
Phase Composition ◽  
Electrical Properties ◽  
Rare Earth Elements ◽  
Leakage Current ◽  
Breakdown Voltage ◽  
Intergranular Phase ◽  
Ceramic Method ◽  
Sem Micrographs ◽  
Ceramic Samples

ZnO-Pr6O11-Dy2O3-based varistor ceramics doped with 0~1.5 mol% La2O3 were fabricated by a conventional ceramic method. All the samples were sintered at 1350 oCfor 2 h. The phase composition and microstructure of the ceramic samples have been investigated by XRD, SEM and EDS. The results of SEM micrographs indicated that the La2O3 additives can promote ZnO grain’s growth, and the rare earth elements dispersed mainly in the intergranular phase observed by EDS. The electrical properties of the samples determined by the V-I curves revealed that the breakdown voltage of samples decreases from 508 V/mm to about 100 V/mm with the increase of La2O3, and the nonlinear exponent also decreases from 20.2 to 13.2. The typical leakage current is about 10.2 μA for the sample doped with 0.5 mol% La2O3.

scholarly journals Electrochemical behaviours of Eu(III)/E(II) and Ce(IV)/Ce(III) in H3PO4-H2O media : solvation and complexation reactions

2018 ◽  
Vol 149 ◽  
pp. 01092
Author(s):  
B. Belqat ◽  
S. Belcadi
Keyword(s):  
Rare Earth ◽  
Phosphoric Acid ◽  
Rare Earth Elements ◽  
Electrochemical Properties ◽  
Essential Elements ◽  
High Tech ◽  
Electrochemical Studies ◽  
Redox Potentials ◽  
Complexation Reactions ◽  
Phosphoric Acid Concentration

Many kinds of rare earth elements (REE) such as europium and cerium have been make them essential elements in many high-tech components. The electrochemical studies can be presented as an interesting indication for europium and cerium extraction from phosphoric solutions, including solvation and complexation reactions. The normal redox potentials of Eu3+/Eu2+ and Ce4+/Ce3+ systems have been determined in H3PO4-H2O media with various phosphoric acid concentration. The solvation of these elements in phosphoric media is characterized by their transfer activity coefficients "f" calculated from the corresponding normal redox potentials. The corresponding solvation increases with increasing the H3PO4 concentration. For each REE, the electrochemical properties depend on its number of charges and on its basic properties. Results suggest that solvation and complexation of REE phosphates are important in controlling REE concentration.

scholarly journals Electro-kinetic Separation of Rare Earth Elements Using a Redox-Active Ligand

2017 ◽  
Vol 129 (43) ◽  
pp. 13635-13639 ◽  
Author(s):  
Huayi Fang ◽  
Bren E. Cole ◽  
Yusen Qiao ◽  
Justin A. Bogart ◽  
Thibault Cheisson ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active ◽  
Kinetic Separation
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