scholarly journals Down- and up-conversion of femtosecond light pulse excitation into visible luminescence in cerium-doped Lu_2SiO_5 – Gd_2SiO_5 solid solution crystals co-doped with Sm^3+ or Dy^3+

2015 ◽  
Vol 23 (4) ◽  
pp. 4552 ◽  
Author(s):  
W. Ryba-Romanowski ◽  
B. Macalik ◽  
M. Berkowski
Keyword(s):  
Solid Solution ◽  
Light Pulse ◽  
Pulse Excitation ◽  
Visible Luminescence ◽  
Femtosecond Light Pulse ◽  
Co Doped

scholarly journals Optimization of Yb2O3-Gd2O3-Y2O3 Co-Doped ZrO2 Agglomerated and Calcined Powders for Air Plasma Spraying

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 373
Author(s):  
Zheng Yan ◽  
Haoran Peng ◽  
Kang Yuan ◽  
Xin Zhang
Keyword(s):  
Solid Solution ◽  
Particle Size ◽  
Plasma Spraying ◽  
Cubic Phase ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Air Plasma Spraying ◽  
Barrier Coating ◽  
Controllable Preparation ◽  
Co Doped

Yb2O3-Gd2O3-Y2O3 co-doped ZrO2 (YGYZ) is considered to be a promising material in thermal barrier coating (TBC) applications. In this study, 2Yb2O3–2Gd2O3–6Y2O3–90ZrO2 (mol.%) (10YGYZ) feedstock candidates for air plasma spraying (APS) were prepared by calcination of agglomerated powders at 1100, 1200, 1300, 1400, and 1500 °C for 3 h, respectively. Incomplete solid solution was observed in calcined powders at 1100, 1200 and 1300 °C, and the 1500 °C calcined powder exhibited poor flowability due to intense sintering effect. The 1400 °C calcined powders were eventually determined to be the optimized feedstock for proper phase structure (cubic phase), great flowability, suitable apparent density and particle size distribution, etc. 10YGYZ TBCs with the optimized feedstock were prepared by APS, exhibiting pure c phase and good chemical uniformity. Controllable preparation of coatings with different porosity (i.e., 7%–9% and 12%–14%) was realized by stand-off distance adjustment.

scholarly journals FABRICATION AND PROPERTIES OF Co DOPED Bi0.5K0.5TiO3 – BiFeO3 SOLID SOLUTION

2018 ◽  
Vol 56 (1A) ◽  
pp. 197
Author(s):  
Nguyen Hoang Tuan
Keyword(s):  
Solid Solution ◽  
Raman Spectroscopy ◽  
Magnetic Properties ◽  
Crystal Structures ◽  
Solid Solutions ◽  
Sol Gel ◽  
Structure And Properties ◽  
Antiferromagnetic Ordering ◽  
Co Doped ◽  
Good Agreement

In this study, we present some results on the structure and properties of the solid solution of Bi0.5K0.5TiO3– BiFeCoO3 (BKT – BFCO) by Sol-gel method. Crystal structures of BKT – BFCO solid solutions were studies by XRD and Raman spectroscopy. The results were in good agreement with the previous reports of Bi0.5K0.5TiO3– BiFeO3 (BKT – BFO) and Bi0.5K0.5TiO3 – BiCoO3 (BKT – BCO) solid solutions. The magnetic properties were investigated via unsaturated M-H loop, which showed the competition of paramagnetic and antiferromagnetic ordering in BKT – BFCO. However, differing from the BKT – BFO and BKT – BCO solid solutions, the unclear values of saturated magnetism in BKT – BFCO raised the unexplained question, which needed further studies.

Moving Picture Recording and Observation of Visible Femtosecond Light Pulse Propagation

2011 ◽  
Vol 50 (5) ◽  
pp. 050205 ◽  
Author(s):  
Takashi Kakue ◽  
Masayuki Aihara ◽  
Tetsuya Takimoto ◽  
Yasuhiro Awatsuji ◽  
Kenzo Nishio ◽  
...  
Keyword(s):  
Light Pulse ◽  
Pulse Propagation ◽  
Femtosecond Light Pulse

scholarly journals Preservation of quantum correlations in a femtosecond light pulse train within an atomic ensemble

2017 ◽  
Vol 95 (1) ◽  
Author(s):  
A. D. Manukhova ◽  
K. S. Tikhonov ◽  
T. Yu. Golubeva ◽  
Yu. M. Golubev
Keyword(s):  
Light Pulse ◽  
Pulse Train ◽  
Quantum Correlations ◽  
Atomic Ensemble ◽  
Femtosecond Light Pulse

Some Structural Aspects of Ionic Conductivity in Co-Doped Ceria-Based Electrolytes

2013 ◽  
Vol 58 (4) ◽  
pp. 1355-1359 ◽  
Author(s):  
M. Dudek
Keyword(s):  
Solid Solution ◽  
Chemical Composition ◽  
Ionic Conductivity ◽  
Solid Oxide Fuel Cells ◽  
Solid Solutions ◽  
Transference Number ◽  
Solid Oxide ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Co Doped

Abstract The sinters of co-doped ceria solid solutions with the formula of Ce0.85Sm0.15-x RxO1.9, where R = Y, Gd, Pr, Tb, Ox-0.15, were obtained from powders synthesised by Pechini method. The linear variation of cell parameter a vs. chemical composition was observed for Ce0.85Sm0:15-xRxO1.9, where R = Y, Gd, Tb, 0 <x<0.15 samples. However, the introduction of Pr3+ into Ce0.85Sm0.15-x PrxO1.9 caused a small deviation from linearity due to possible changes in the valence from Pr3+ to Pr4+. The determined values of oxide transference number tion for Ce0.85Sm0.15-xRxO1.9, R = Y, Gd in the temperature range 400-750°C and partial oxygen pressure from 10-6 to 1 atm were close to 1, which indicated that materials investigated exhibited practically pure ionic oxide conductivity. On the other hand, the introduction of Tb3+ or Pr3+ higher than x>0.05 into solid solution Ce0.85Sm0.15-xRxO1.9, R = Tb, Pr caused a decrease in the ionic transference number tion below 1 due to an increase in partial electronic conduction. This fact limiting investigated co-doped terbia and samaria or samaria and praseodymia ceria-based solid solutions for the further application as oxide electrolytes in solid oxide fuel cells. The analysis of bulk and grain boundary values indicated that partial substitution of Sm3+ by Y3+ or Gd3+ caused slight improvements in the ionic conductivity of Ce0.85Sm0.15-xRxO1.9. The highest ionic conductivity was found for solid solution with chemical composition Ce0.85Sm0.1Y0.05O1.9. The selected co-doped ceria samples were tested as solid electrolytes in solid oxide fuel cells operating in the intermediate temperature range 500-750°C.

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