In situ investigation of the selenization kinetics of Cu–Ga precursors using time-resolved high-temperature X-ray diffraction

2007 ◽  
Vol 515 (15) ◽  
pp. 5837-5842 ◽  
Author(s):  
W.K. Kim ◽  
E.A. Payzant ◽  
T.J. Anderson ◽  
O.D. Crisalle
2012 ◽  
Vol 111 (7) ◽  
pp. 07A316 ◽  
Author(s):  
Samuel J. Kernion ◽  
Paul R. Ohodnicki ◽  
Michael E. McHenry

2016 ◽  
Vol 88 (11) ◽  
pp. 1684-1692 ◽  
Author(s):  
Lukas C. Buelens ◽  
Vladimir V. Galvita ◽  
Hilde Poelman ◽  
Christophe Detavernier ◽  
Guy B. Marin

1994 ◽  
Vol 9 (2) ◽  
pp. 275-285 ◽  
Author(s):  
V. Milonopoulou ◽  
K.M. Forster ◽  
J.P. Formica ◽  
J. Kulik ◽  
J.T. Richardson ◽  
...  

The YBa2Cu3O7−x formation kinetics from a spray-roasted precursor powder containing Y2O3, BaCO3, and CuO was followed via in situ, time-resolved x-ray diffraction as a function of gas atmosphere and temperature. In inert atmospheres, BaCO3 and CuO form BaCu2O2 which subsequently reacts with Y2O3 to form YBa2Cu3O6. However, YBa2Cu3O6 decomposes at temperatures exceeding 725 °C with Y2BaCuO5 being one of the decomposition products. In oxidizing atmospheres, YBa2Cu3O7−x formation involves the BaCuO2. At high temperatures (800–840 °C), oxygen increases the yield of YBa2Cu3O6. A nuclei growth model assuming two-dimensional, diffusion-controlled growth with second-order nucleation rate fits the experimental data.


2007 ◽  
Vol 558-559 ◽  
pp. 943-947 ◽  
Author(s):  
E. Otterstein ◽  
R. Nicula ◽  
J. Bednarčík ◽  
M. Stir ◽  
E. Burkel

Quasicrystals are aperiodic long-range ordered solids with a high potential for many modern applications. Interest is nowadays paid to the development of economically viable large-scale synthesis procedures of quasicrystalline materials involving solid-state transformations. The kinetics of the high-temperature phase transition from the complex ω-phase to the icosahedral quasicrystalline (iQC) ψ-phase in AlCuFe nanopowders was here examined by in-situ time-resolved X-ray diffraction experiments using synchrotron radiation. In-situ XRD experiments will allow insight on the influence of uniaxial applied pressure on the kinetics of phase transitions leading to the formation of single-phase QC nanopowders and further contribute to the optimization of sintering procedures for nano-quasicrystalline AlCuFe alloy powders.


2000 ◽  
Vol 71 (11) ◽  
pp. 4177 ◽  
Author(s):  
Margret J. Geselbracht ◽  
Richard I. Walton ◽  
E. Sarah Cowell ◽  
Franck Millange ◽  
Dermot O’Hare

1999 ◽  
Vol 70 (5) ◽  
pp. 2248-2252 ◽  
Author(s):  
M. J. Capitán ◽  
N. Thouin ◽  
G. Rostaing

2018 ◽  
Vol 139 ◽  
pp. 346-354 ◽  
Author(s):  
Emmanuel de Bilbao ◽  
Mathieu Dombrowski ◽  
Henry Pilliere ◽  
Jacques Poirier

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