Effects of Alkali Element Doping and Synthesis Conditions on the Genesis of the Phase Composition of Alumina–Chromium Catalysts

2019 ◽  
Vol 60 (1) ◽  
pp. 96-105
Author(s):  
V. V. Chesnokov ◽  
N. N. Boldyreva ◽  
L. S. Dovlitova ◽  
D. A. Zyuzin ◽  
V. N. Parmon
Keyword(s):  
Phase Composition ◽  
Synthesis Conditions ◽  
Alkali Element ◽  
Element Doping ◽  
Chromium Catalysts

scholarly journals Review on Alkali Element Doping in Cu(In,Ga)Se 2 Thin Films and Solar Cells

Engineering ◽  
2017 ◽  
Vol 3 (4) ◽  
pp. 452-459 ◽  
Author(s):  
Yun Sun ◽  
Shuping Lin ◽  
Wei Li ◽  
Shiqing Cheng ◽  
Yunxiang Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Alkali Element ◽  
Element Doping

Effect of Synthesis Conditions and Actinide Contents on Phase Composition of Actinide Bearing Ceramics

2003 ◽  
Vol 807 ◽  
Author(s):  
A. G. Ptashkin ◽  
S. V. Stefanovsky ◽  
S. V. Yudintsev ◽  
S. A. Perevalov
Keyword(s):  
Electron Microscopy ◽  
Solid Solution ◽  
Phase Composition ◽  
Fluorite Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Synthesis Conditions ◽  
Reducing Conditions ◽  
Dispersive System ◽  
Scanning Electron

ABSTRACTPu-bearing zirconolite and pyrochlore based ceramics were prepared by melting under oxidizing and reducing conditions at 1550 °C. 239Pu content in the samples ranged between ∼10 and ∼50 wt.%. Phase composition of the ceramics and Pu partitioning were studied using X-ray diffraction (XRD) and scanning electron microscopy with energy dispersive system (SEM/EDS). Major phases in the samples were found to be the target zirconolite and pyrochlore as well as a cubic fluorite structure oxide. Normally the Pu content in the Pu host phases was 10–12 wt.%. This corresponds to the Pu content recommended for matrices for immobilization of excess weapons plutonium. At higher Pu content (up to 50 wt.%) additional phases, such as a PuO2-based cubic fluorite-structured solid solution, perovskite, and rutile were found.

The Effect of Synthesis Conditions on the Phase Composition and Structure of EuBa2Cu3O6 + δ Samples

2018 ◽  
Vol 119 (3) ◽  
pp. 216-228
Author(s):  
L. A. Klinkova ◽  
V. I. Nikolaichik ◽  
N. V. Barkovskii ◽  
V. K. Fedotov ◽  
A. F. Shevchun
Keyword(s):  
Phase Composition ◽  
Synthesis Conditions ◽  
Composition And Structure

Effect of Lithium Nitrate Doping on the Phase Composition of Alumina–Chromium Catalysts

2020 ◽  
Vol 61 (3) ◽  
pp. 473-479
Author(s):  
N. N. Boldyreva ◽  
V. V. Chesnokov ◽  
L. S. Dovlitova ◽  
A. S. Chichkan
Keyword(s):  
Phase Composition ◽  
Lithium Nitrate ◽  
Chromium Catalysts

Effect of Synthesis Conditions on the Structure and Phase Composition of Magnesium Diboride

2019 ◽  
Vol 10 (1) ◽  
pp. 162-167 ◽  
Author(s):  
I. M. Abdyukhanov ◽  
A. S. Tsapleva ◽  
A. V. Borisov ◽  
O. A. Krymskaya ◽  
M. G. Isaenkova ◽  
...  
Keyword(s):  
Phase Composition ◽  
Magnesium Diboride ◽  
Synthesis Conditions

Correlations Between Conditions of Synthesis, Phase Composition and Luminescent Properties of Eu - Polytantalate

2003 ◽  
Vol 796 ◽  
Author(s):  
Vladimir Vasilyev ◽  
Alvin Drehman ◽  
Lionel Bouthillette
Keyword(s):  
Phase Composition ◽  
Luminescent Properties ◽  
Luminescent Materials ◽  
Temperature Dependent ◽  
Sintered Ceramic ◽  
X Ray ◽  
Synthesis Conditions ◽  
Ceramic Thin Films ◽  
Synthesis Parameters ◽  
Temperature Dependent Photoluminescence

ABSTRACTCorrelations between synthesis conditions, phase composition, and spectral properties of the sintered ceramic, thin films and single crystals of EuTa7O19 phosphors have been studied using x-ray diffractometry and temperature dependent photoluminescence (PL) spectroscopy at temperatures between 18 K and 650 K. From the PL spectra of Eu3+, one can obtain information about the area of homogeneity of phases, their temperature transformations, and changes in the bonding character in the neighborhood of the luminescent ion. As a result, this information helps to optimize the synthesis parameters for luminescent materials.

Effect of synthesis conditions on the phase composition and critical current density of Bi1.6Pb0.4Sr2−x KxCa2Cu3F0.8Oy

2000 ◽  
Vol 26 (4) ◽  
pp. 354-356 ◽  
Author(s):  
V. V. Petrashko ◽  
B. V. Novysh ◽  
N. A. Prytkova ◽  
E. M. Gololobov ◽  
L. A. Kurochkin
Keyword(s):  
Phase Composition ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Synthesis Conditions

Effect of Synthesis Conditions on Phase Composition of Pyrochlore-Brannerite Ceramics

2000 ◽  
Vol 663 ◽  
Author(s):  
S.V. Stefanovsky ◽  
S.V. Yudintsev ◽  
B.S. Nikonov ◽  
M.I. Lapina ◽  
A.S. Aloy
Keyword(s):  
Solid Solution ◽  
Phase Composition ◽  
High Temperatures ◽  
Microwave Oven ◽  
Redox Conditions ◽  
Cold Crucible ◽  
Synthesis Conditions ◽  
The Third ◽  
Three Samples

ABSTRACTThree melted samples of pyrochlore-brannerite-based ceramics produced under different redox conditions were examined. Two of the samples were produced using cold crucible melting at ~1600 C. The third sample was obtained via melting in a microwave oven at 1700-1800 C. All the samples are composed of major pyrochlore and brannerite phases, and minor rutile and UO2-based solid solution or pseudobrookite phases. Pyrochlore-structured phases predominate in all three samples and account for 50-60% of the total bulk. Two pyrochlore varieties – Ca-pyrochlore (predominant) and Ba-pyrochlore have been found in these samples. The latter phase is more stable at high temperatures than the Ba-hollandite present in sintered pyrochlore-rich Synroc-F ceramics. Decomposition of the Ba-hollandite results in rutile formation in the melted samples.

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