Zobrazeno 1 - 10
of 90
pro vyhledávání: '"G. Vacquier"'
Publikováno v:
Annales de chimie Science des Matériaux. 32:69-80
Dans cet article sont presentees des etudes concernant la synthese, la structure cristalline et la decomposition thermique de trois oxalates hydrates de bismuth (III). Ces composes sont obtenus par precipitation en phase acqueuse a pH controle, a par
Autor:
F. Chehimi-Moumen, P. Llewellyn, F. Rouquerol, G. Vacquier, D. Ben Hassen-Chehimi, M. Ferid, M. Trabelsi-Ayadi
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 82:783-789
Publikováno v:
Solid State Ionics. 157:163-169
Several kinds of bismuth (III) oxalate have been prepared, depending on the experimental conditions during their precipitation. Decomposition of these precursors is followed by CRTA techniques. Under vacuum, the nature of decomposition product depend
Publikováno v:
Superconductor Science and Technology. 13:1155-1161
Bi 2 (Sr, Ln) 2 CuO z (Ln = Nd, Sm) single crystals were successfully grown by a self-flux method from stoichiometric and (Bi, Cu)-rich melts. Thermal analysis and thermogravimetry were used to determine stability and the melting sequence of Bi 2 (Sr
Autor:
G. Vacquier, O. Monnereau, H. Faqir, H Nadifi, L. Tortet, C. Grigorescu, C. Boulesteix, A. Ouali
Publikováno v:
Superconductor Science and Technology. 13:1174-1179
Preparation of Bi-2223/Bi-2310 and Bi-2212/BiFeO3 composites has been performed so as to obtain some active composites where the superconductive properties of Bi-2223 or Bi-2212 can be modified using a property of the insulating phase. In both cases
Publikováno v:
physica status solidi (a). 179:403-406
We have observed a sharp peak (100%) in the in-plane resistivity ? ab just above T c , in Bi-2212 crystals, in agreement with previous results from Han et al. who attributed this anomaly to the quasi-reentrant behaviour already observed for polycryst
Publikováno v:
Annales de Chimie Science des Matériaux. 25:281-292
In order to complement a previous study of the electrical properties of xFe/(1 − x) YBa2Cu3O7 − δ composites, the thermal dependence of lattice constants and orthorhombic strain (b − a) / (a+b) in the range 15 K < T < 300 K was investigated by
Autor:
G. Vacquier, C. Boulesteix, H. Faqir, V. Grachev, T. Badeche, Y. Marietti, H Tatarenko-Zapolsky, Odile Monnereau
Publikováno v:
Journal of Physics and Chemistry of Solids. 61:585-592
In-plane and out-of-plane resistivity versus temperature measurements have been carried out on different kinds of as-grown Bi-2212 crystals: ρ ab ( T ) and ρ c ( T ); ρ c ( T ) has been specially used for determination of the 2D or 3D character of
Publikováno v:
Annales de Chimie Science des Matériaux. 24:443-455
In order to improve the electrical and/or mechanical properties of bismuth cuprate superconductors, composites have been elaborated by pressing polycrystalline Bi 2 Sr 2 CaCu 2 O 8 + δ (2212) mixed with two insulator oxides into pellets, which were
Publikováno v:
Scopus-Elsevier
Surface modifications on aluminium nitride (AlN) induced by an UV laser treatment have been investigated using advanced surface techniques (scanning electronic microscopy (SEM), energy dispersive spectroscopy (EDS), Auger electron spectroscopy (AES),