| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Tambelli, C. E. | |
| dc.creator | Donoso, J. P. | |
| dc.creator | Magon, C. J. | |
| dc.creator | Angelo, ACD | |
| dc.creator | Florentino, A. O. | |
| dc.creator | Saeki, Margarida Juri | |
| dc.date | 2014-05-20T13:53:17Z | |
| dc.date | 2016-10-25T17:03:55Z | |
| dc.date | 2014-05-20T13:53:17Z | |
| dc.date | 2016-10-25T17:03:55Z | |
| dc.date | 2000-11-01 | |
| dc.date.accessioned | 2017-04-05T21:08:28Z | |
| dc.date.available | 2017-04-05T21:08:28Z | |
| dc.identifier | Solid State Ionics. Amsterdam: Elsevier B.V., v. 136, p. 243-247, 2000. | |
| dc.identifier | 0167-2738 | |
| dc.identifier | http://hdl.handle.net/11449/19003 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/19003 | |
| dc.identifier | 10.1016/S0167-2738(00)00316-7 | |
| dc.identifier | WOS:000165996600034 | |
| dc.identifier | http://dx.doi.org/10.1016/S0167-2738(00)00316-7 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/865008 | |
| dc.description | Electrical conductivity and H-1 Nuclear Magnetic Resonance (NMR) techniques were used to investigate the ion-exchanged layered lead-niobate perovskite HPb2Nb3O10. nH(2)O, over the temperature range 90-350 K. Compounds were synthesized by the sol-gel method and calcinated at 650 degreesC. Analysis of the NMR data gives activation energies for the proton motion in the range 0.14-0.40 eV, which are dependent on the water content. The frequency and temperature dependencies of the proton spin-lattice relaxation times show that the character of the motion of the: water molecules is essentially two-dimensional, reflecting the layered structure of the material. The H-1 line-narrowing transition and the single spin-lattice relaxation rate maximum, observed in the hydrated compounds, are consistent with a Grotthuss-like mechanism for the proton diffusion. (C) 2000 Elsevier B.V. B.V. All rights reserved. | |
| dc.language | eng | |
| dc.publisher | Elsevier B.V. | |
| dc.relation | Solid State Ionics | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | NMR | |
| dc.subject | impedance spectroscopy | |
| dc.subject | proton conductor | |
| dc.subject | sol-gel | |
| dc.subject | perovskite | |
| dc.title | NMR and conductivity study of the protonic conductor HPb2Nb3O10 center dot nH(2)O | |
| dc.type | Otro | |
