Zobrazeno 1 - 10
of 60
pro vyhledávání: '"J.P. Loup"'
Publikováno v:
High Temperatures-High Pressures. 34:177-183
A specific apparatus to acquire conductivity data on glass former systems such as alumino-silicates in both solid and liquid state is reported. To illustrate the abilities of such a device, typical results obtained on a compound belonging to the alum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46566a6e67195af1bb98a7b70906cb21
https://doi.org/10.1068/htwu322
https://doi.org/10.1068/htwu322
Publikováno v:
Journal of Non-Crystalline Solids. 281:117-124
The electrical conductivity of ternary CaO–Al2O3–SiO2 compositions has been studied both in the solid and the liquid states. Below Tg, calcium migration, described well by an Arrhenius law, is highly influenced by the non-bridging oxygen (NBO) co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b55c3bde3ebe2d12af93f44462601cc
https://doi.org/10.1016/s0022-3093(00)00423-3
https://doi.org/10.1016/s0022-3093(00)00423-3
Publikováno v:
The European Physical Journal Applied Physics. 4:101-106
This paper describes an experimental set-up designed to measure the conductivity of alumino-silicates melts at different temperatures up to 1650 °C. This conductivity cell has allowed to study the conductivity versus temperature of the gehlenite (2C
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e6ac80b1ae602363a960b29d0ab2cdf
https://doi.org/10.1051/epjap:1998248
https://doi.org/10.1051/epjap:1998248
Publikováno v:
Journal of Solid State Chemistry. 138:260-266
Magnetic properties of La{sub 2}NiO{sub 4.16} and La{sub 2{minus}x}Pr{sub x}NiO{sub 4+{delta}} are studied by dc susceptibility in a wide temperature range, i.e., 4--1,200 K. The principal aim is to investigate the modifications of magnetic interacti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63a12d894816e39ea08889986bce1a57
https://doi.org/10.1006/jssc.1998.7781
https://doi.org/10.1006/jssc.1998.7781
Publikováno v:
European Journal of Solid State and Inorganic Chemistry. 35:173-188
Two synthesis methods for preparing Pr 4 Ni 3 O 10±δ are compared : a modified sol — gel route and a nitrate — citrate one. It is shown that the autoignition involved in the nitrate — citrate route provides good conditions ressembling the Rap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::149e105f57bad1a1d8bdacca4c59f4f1
https://doi.org/10.1016/s0992-4361(98)80195-1
https://doi.org/10.1016/s0992-4361(98)80195-1
Publikováno v:
Journal of Solid State Chemistry. 131:167-172
We report herein results concerning the solid solutions Pr 2− x M x NiO 4+ δ , M =La, Sr. These two cations are larger than praseodymium and lead to a structural stabilization. The oxygen excess δ decreases with x for La and Sr substituted Pr 2 N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fefbe911dee7201bbb6054adacbb019
https://doi.org/10.1006/jssc.1997.7402
https://doi.org/10.1006/jssc.1997.7402
Autor:
C. Allançon, José-Luis Martínez, P. Odier, Juan Rodriguez-Carvajal, Jean-Marc Bassat, M. T. Fernández-Díaz, J.P. Loup
Publikováno v:
Zeitschrift für Physik B Condensed Matter. 100:85-90
Powder neutron diffraction measurements have been carried out on oxidised Pr2NiO4+δ at high temperature under O2 atmosphere. A structural transition takes place at about 720 K from an orthorhombic symmetry to a tetragonal one. The high temperature s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62145764cfb49180a676ef7ef7324971
https://doi.org/10.1007/s002570050097
https://doi.org/10.1007/s002570050097
Publikováno v:
Solid State Communications. 93:579-583
SrVO 3 and Sr 2 VO 4 have been studied with respect to their electrical properties. The resistivity of SrVO 3 has been measured from 4 to 840 K. It is metallic with a T 2 law below 200 K, characteristic of electronic correlation. Above 200 K and up t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e807427f802424e841672bc747b9a03
https://doi.org/10.1016/0038-1098(94)00834-y
https://doi.org/10.1016/0038-1098(94)00834-y
Publikováno v:
Solid State Ionics. 74:239-248
We have investigated structural transitions in Pr 2 NiO 4+δ(δ≥0) using DSC, TGA and XRD measurements. This study reveals firstly that the so called LTT (Low Temperature Tetragonal) phase i.e. P4 2 /ncm symmetry exists not only for δ=0 but also f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfda61a785145bc9eda9d6eb30917738
https://doi.org/10.1016/0167-2738(94)90216-x
https://doi.org/10.1016/0167-2738(94)90216-x
Progressive change with T from hopping to random phase propagation in La2-xNiO4- delta( delta >or=0)
Publikováno v:
Journal of Physics: Condensed Matter. 6:8285-8293
Electronic properties of La2-xNiO4- delta (0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16cd42cdcd5605a26523d39575c150e5
https://doi.org/10.1088/0953-8984/6/40/019
https://doi.org/10.1088/0953-8984/6/40/019