Lasing properties of new Yb-doped borate compounds with varying gadolinium and yttrium concentration

2011 ◽  
Author(s):  
Inka Manek-Hönninger ◽  
Marie Chavoutier ◽  
Véronique Jubera ◽  
Dominique Descamps ◽  
Philippe Veber ◽  
...  
Keyword(s):  
Yttrium Concentration

scholarly journals High-Temperature Elastic Properties of Yttrium-Doped Barium Zirconate

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 968
Author(s):  
Fumitada Iguchi ◽  
Keisuke Hinata
Keyword(s):  
High Temperature ◽  
Young’S Modulus ◽  
Elastic Properties ◽  
Measurement Method ◽  
Young's Modulus ◽  
Barium Zirconate ◽  
Shear Moduli ◽  
Ceramic Fuel ◽  
Yttrium Concentration ◽  
Ceramic Fuel Cells

The elastic properties of 0, 10, 15, and 20 mol% yttrium-doped barium zirconate (BZY0, BZY10, BZY15, and BZY20) at the operating temperatures of protonic ceramic fuel cells were evaluated. The proposed measurement method for low sinterability materials could accurately determine the sonic velocities of small-pellet-type samples, and the elastic properties were determined based on these velocities. The Young’s modulus of BZY10, BZY15, and BZY20 was 224, 218, and 209 GPa at 20 °C, respectively, and the values decreased as the yttrium concentration increased. At high temperatures (>20 °C), as the temperature increased, the Young’s and shear moduli decreased, whereas the bulk modulus and Poisson’s ratio increased. The Young’s and shear moduli varied nonlinearly with the temperature: The values decreased rapidly from 100 to 300 °C and gradually at temperatures beyond 400 °C. The Young’s modulus of BZY10, BZY15, and BZY20 was 137, 159, and 122 GPa at 500 °C, respectively, 30–40% smaller than the values at 20 °C. The influence of the temperature was larger than that of the change in the yttrium concentration.

Tungsten–chromium–yttrium alloys as first wall armor material: Yttrium concentration, oxygen content and transmutation elements

2020 ◽  
Vol 158 ◽  
pp. 111667 ◽  
Author(s):  
Felix Klein ◽  
Mark R. Gilbert ◽  
Andrey Litnovsky ◽  
Jesus Gonzalez-Julian ◽  
Sophie Weckauf ◽  
...  
Keyword(s):  
Oxygen Content ◽  
First Wall ◽  
Yttrium Concentration

Effect of Stable Yttrium Concentration on the Distribution and Excretion of Inhaled Radioyttrium in the Rat

AIHAJ ◽  
1969 ◽  
Vol 30 (6) ◽  
pp. 630-634 ◽  
Author(s):  
W. J. Wenzel ◽  
R. G. Thomas ◽  
R. O. McClellan
Keyword(s):  
Yttrium Concentration

Ordered yttrium concentration effects on barium zirconate structure, proton binding sites and transition states

2017 ◽  
Vol 304 ◽  
pp. 126-134 ◽  
Author(s):  
Maria A. Gomez ◽  
Gillian Kwan ◽  
Wanshu Zhu ◽  
Monica Chelliah ◽  
Xintong Zuo ◽  
...  
Keyword(s):  
Binding Sites ◽  
Transition States ◽  
Barium Zirconate ◽  
Concentration Effects ◽  
Proton Binding ◽  
Yttrium Concentration

High-Tc Superconducting Films of Y-Ba-Cu Oxide Prepared by a CO2 Laser Beam Evaporation

1987 ◽  
Vol 99 ◽  
Author(s):  
K. Tachikawa ◽  
I. Atanabe ◽  
S. Kosuge ◽  
M. Ono
Keyword(s):  
Superconducting Films ◽  
Laser Evaporation ◽  
High Tc ◽  
Target Composition ◽  
Post Annealing ◽  
Key Factor ◽  
Zero Resistance ◽  
Yttrium Concentration ◽  
Ybco Superconducting Films ◽  
Bulk Target

ABSTRACTThe high-Tc YBCO superconducting films have been prepared using a cw CO2 laser evaporation from a single bulk target. The adjustment of the target composition, especially the yttrium concentration, was found to be a key factor to achieve a desired film composition. After post-annealing at 930°C, the films deposited on YSZ substrate exhibited a zero resistance temperature of 85K. The deposition rate of the films was about lOOA/sec.

The Effect of Yttrium and Indium Doping on the Structure and Electrical Properties of Zinc-Ferrite Nanoparticles

2007 ◽  
Vol 128 ◽  
pp. 101-106 ◽  
Author(s):  
Marija Maletin ◽  
Evagelia G. Moshopoulou ◽  
Stevan Jankov ◽  
Srdjan Rakic ◽  
Vladimir V. Srdic
Keyword(s):  
Electrical Conductivity ◽  
Spinel Structure ◽  
Zinc Ferrite ◽  
Single Phase ◽  
Spinel Phase ◽  
Ferrite Nanoparticles ◽  
Second Phase ◽  
Indium Doping ◽  
Yttrium Concentration

Yttrium- and indium-doped zinc-ferrite nanoparticles were prepared by a coprecipitation method. The influence of doping level on the structure and the conductivity of the samples obtained was investigated. It was found that Y-doped zinc-ferrite nanoparticles, with a single spinel phase and a size of a few nanometers, are formed in the whole range of yttrium concentration. However, In-doped zinc-ferrite nanoparticles were formed for all investigated indium cooncentrations, but only the samples InxZn1-xFe2O4 with x.≤ 0.15 are single-phase (for x ≥ 0.20 a second phase - cubic In(OH)3, is formed). The decrease and increase of the electrical conductivity with yttrium and indium doping respectively are explained by taking into consideration the different role of these ions in the spinel structure and the electron hopping mechanism.

Synthesis of HgSr2-xYxCa2Cu3O8+ δ Superconducting Compound

2021 ◽  
Vol 886 ◽  
pp. 42-47
Author(s):  
Mustafa K. Kamil ◽  
Maher A. Hasan ◽  
Kareem Ali Jasim ◽  
Auday H. Shaban
Keyword(s):  
High Temperature ◽  
Critical Temperature ◽  
Electrical Resistance ◽  
Partial Substitution ◽  
Special Focus ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural And Electrical Properties ◽  
Superconducting Compound ◽  
Yttrium Concentration

The superconductivity phenomenon and the method of preparing the superconductingmercury-based (HgSr2-xYxCa2Cu3O8+δ with x=0 to 0.15) compound were presented in this paper. The physical properties of the compound are presented at a high temperature, with a special focus on the effect of partial substitution of strontium with Yttrium (Y). The effect on structural and electrical properties were investigated. All the samples in the present investigation were subjected to gross structural characterization by X-ray diffraction. The XRD data collected from various have the Hg1223 phase and the analysis showed that all samples correspond to the tetragonal structure. The electrical resistance uses the four probe technology to find the critical temperature and found that it drops from 116 K to 81K by increase the yttrium concentration.

scholarly journals Rare earth element and yttrium geochemistry applied to the genetic study of cryolite ore at the Pitinga Mine (Amazon, Brazil)

2008 ◽  
Vol 80 (4) ◽  
pp. 719-733 ◽  
Author(s):  
Orlando R.R. Minuzzi ◽  
Artur C. Bastos Neto ◽  
Milton L.L. Formoso ◽  
Sandra Andrade ◽  
Valcir A. Janasi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Earth Element ◽  
Ore Deposits ◽  
Hydrothermal Fluids ◽  
Tetrad Effect ◽  
Geochemical Study ◽  
Show Evidence ◽  
Yttrium Concentration ◽  
Additional Formation ◽  
Albite Granite

This work aims at the geochemical study of Pitinga cryolite mineralization through REE and Y analyses in disseminated and massive cryolite ore deposits, as well as in fluorite occurrences. REE signatures in fluorite and cryolite are similar to those in the Madeira albite granite. The highest ΣREE values are found in magmatic cryolite (677 to 1345 ppm); ΣREE is lower in massive cryolite. Average values for the different cryolite types are 10.3 ppm, 6.66 ppm and 8.38 ppm (for nucleated, caramel and white types, respectively). Disseminated fluorite displays higher ΣREE values (1708 and 1526ppm) than fluorite in late veins(34.81ppm). Yttrium concentration is higher in disseminated fluorite and in magmatic cryolite. The evolution of several parameters (REEtotal, LREE/HREE, Y) was followed throughout successive stages of evolution in albite granites and associated mineralization. At the end of the process, late cryolite was formed with low REEtotal content. REE data indicate that the MCD was formed by, and the disseminated ore enriched by (additional formation of hydrothermal disseminated cryolite), hydrothermal fluids, residual from albite granite. The presence of tetrads is poorly defined, although nucleated, caramel and white cryolite types show evidence for tetrad effect.

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