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Kinetics of thermal decomposition of niobium hydride
(ELSEVIER SCI LTDOXFORD, 2012-01)
High-purity niobium powders can be obtained from the well-known hydride-dehydride (HDH) process. The aim of this work was the investigation of the structural phase transition of the niobium hydride to niobium metal as ...
Effect of additive distribution in H2 absorption and desorption kinetics in MgH2 milled with NbH0.9 or NbF5
(Pergamon-Elsevier Science Ltd, 2018-04-12)
This paper presents a comparative study of H2 absorption and desorption in MgH2 milled with NbF5 or NbH0.9. The addition of NbF5 or NbH0.9 greatly improves hydriding and dehydriding kinetics. After 80 h of milling the ...
Niobium hydrogenation process Effect of temperature and cooling rate from the hydrogenation temperature
(ELSEVIER SCI LTD, 2011)
High-purity niobium powder can be produced via the hydrogenation and dehydrogenation processes The present work aimed at the effect of temperature and cooling rate conditions on the niobium hydrogenation process using ...
Kinetic improvement of H2 absorption and desorption properties in Mg/MgH2 by using niobium ethoxide as additive
(Pergamon-Elsevier Science Ltd, 2019-05)
The hydrogen absorption and desorption properties of a MgH2 – 1 mol.% Nb(V)ethoxide mixture are reported. The material was prepared by hand mixing the additive with previously ball-milled MgH2. Nb ethoxide reacts with MgH2 ...
Study of MgH2 + NbF5 mixtures: Formation of MgH2−xFx solid solutions and interaction with hydrogen
(Elsevier, 2015-02)
A mixture of MgH2 and (7 mol%) NbF5 has been mechanically milled under Ar atmosphere. The evolution of the materials has been studied by in situ pressure monitoring, XRD, DSC, TG, TPD, SEM, and isothermal hydrogen absorption ...