Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Jean-Maurice Réau"'
Publikováno v:
Solid State Ionics. 125:193-202
X-ray diffraction, calorimetry, vibrational and impedance spectroscopy studies of a new protonic conductor with the RbH(SO 4 ) 0.81 (SeO 4 ) 0.19 composition are offered. Crystals of this composition undergo five phase transitions at T =245, 288, 353
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70f7fa11579aa8a0dc6644458322d20b
https://doi.org/10.1016/s0167-2738(99)00176-9
https://doi.org/10.1016/s0167-2738(99)00176-9
Publikováno v:
Phase Transitions. 69:227-236
Analysis of the a.c. conductivity data of Pb5Al3F19 within the complex permittivity formalism allowed, in a previous work, to show a new transition at 670 K corresponding most probably to the expected, but hitherto unobserved, transition from the par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::443c55df13c977d8af108e7f51d542e9
https://doi.org/10.1080/01411599908208021
https://doi.org/10.1080/01411599908208021
Publikováno v:
Phase Transitions. 68:365-381
A phase transition at T r = 365±10K is shown for Pb9Al2F24 by high-temperature X-ray diffraction, microcalorimetric and electrical measurements. The AC conductivity data of Pb9Al2F24 are analyzed in the Z*, M* and e* formalisms and the conductivity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09af89fb80851a2a8737ff7a2bfc17ca
https://doi.org/10.1080/01411599908224520
https://doi.org/10.1080/01411599908224520
Publikováno v:
Solid State Ionics. 116:229-239
The F − ion transport and diffusion properties inside the solid solution Pb 1− x Cr x F 2+ x (0≤ x ≤0.12) with fluorite-type structure have been determined by impedance spectroscopy and 19 F NMR investigation. The various electrical parameter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c187a22771e00ea0ecc49a04feedfa8e
https://doi.org/10.1016/s0167-2738(98)00347-6
https://doi.org/10.1016/s0167-2738(98)00347-6
Autor:
Jean-Maurice Réau, Paul Hagenmuller
Publikováno v:
Reviews in Inorganic Chemistry. 19:45-78
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b1a783a09c5b0871eae508128cf9045
https://doi.org/10.1515/revic.1999.19.1-2.45
https://doi.org/10.1515/revic.1999.19.1-2.45
Publikováno v:
Solid State Ionics. 107:293-305
A 19 F NMR investigation of anion deficient solid solutions of Ln 1− y Cd y F 3− y (Ln=Ce, Nd) with the tysonite-type structure has been carried out as a function of temperature. Exchange processes, at first between the F 1 and F 2 sublattices, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b7b103f93cfd6d14793ea721d37a09b
https://doi.org/10.1016/s0167-2738(97)00536-5
https://doi.org/10.1016/s0167-2738(97)00536-5
Publikováno v:
Solid State Ionics. 107:281-291
New fast F − ion conductors with tysonite-type structure have been obtained inside anion-deficient non-stoichiometric solid solutions of Ln 1− y Cd y F 3− y formulation (Ln=Ce, Nd). An exchange mechanism between fluoride sublattices has been id
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62bdd5f14709954d4e60888faf239875
https://doi.org/10.1016/s0167-2738(97)00535-3
https://doi.org/10.1016/s0167-2738(97)00535-3
Autor:
Mohamed El Omari, Jean Ravez, Jean Sénégas, Abdelmajid Yacoubi, S. C. Abrahams, Jean-Maurice Réau, Abdellah Nadiri
Publikováno v:
The Journal of Chemical Physics. 108:2896-2902
The ac (alternating current) conductivity of Pb5Al3F19 between 293 and 743 K has been analyzed within a combined complex impedance, modulus, and permittivity formalism. The antiferroelectric phase IV to ferroelastic phase III, and the phase III to pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c7e5605c9068bc57558da7e0605c86c
https://doi.org/10.1063/1.475677
https://doi.org/10.1063/1.475677
Publikováno v:
Journal of Materials Chemistry. 8:2423-2428
Correlations between Curie temperature and chemical bonding were found in ferroelectric tetragonal potassium tungsten bronze type ceramics [TKWB] using the extended Hckel tight-binding (EHTB) method. The influence of Pb for K,Li substitution is shown
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::865a06403ba4a81075245f14ae05c24a
https://doi.org/10.1039/a803412e
https://doi.org/10.1039/a803412e
Publikováno v:
physica status solidi (b). 203:17-27
Conductivity parameters, number of charge carriers, frequency of hopping, have been determined from an analysis of ac conductivity data of the Sr 1-x Th x F 2+2x (0 ≤ x ≤ 0.225) solid solution with fluorite-type structure. The charge carrier conc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26dd8afa40b4c97bf152f009476361a2
https://doi.org/10.1002/1521-3951(199709)203:1<17::aid-pssb17>3.0.co
https://doi.org/10.1002/1521-3951(199709)203:1<17::aid-pssb17>3.0.co