Ionic conductivity and structural characterization of Na1.5Nb0.3Zr1.5(PO4)(3) with NASICON-type structure

被引：37
作者：
Verissimo, C
Garrido, FMS
Alves, OL
Calle, P
MartinezJuarez, A
Iglesias, JE
Rojo, JM
机构：
[1] CSIC,INST CIENCIA MAT,E-28049 MADRID,SPAIN
[2] UNICAMP,INST QUIM,LAB QUIM ESTADO SOLIDO,BR-13081 CAMPINAS,BRAZIL
[3] UAM,FAC CIENCIAS,DEPT QUIM FIS APLICADA,MADRID 28049,SPAIN
[4] UNIV FED RIO DE JANEIRO,INST QUIM,BR-21941 RIO JANEIRO,BRAZIL
来源：
SOLID STATE IONICS | 1997年 / 100卷 / 1-2期
关键词：
NASICON; ionic conductivity; sodium niobium; zirconium phosphate;
D O I：
10.1016/S0167-2738(97)00307-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The NASICON-type Na1.5Nb0.3Zr1.5(PO4)(3) was prepared by solid state reaction of Nb2O5 and the precursor gamma-NaHZr(PO4)(2) at 700 degrees C. The EPR spectra showed a signal with a g factor of 1.984 assigned to Nb (IV) species in octahedral oxygen environments. The X-ray powder diffraction pattern obtained with monochromatic radiation was indexed on the basis of a rhombohedral cell, the hexagonal parameters being a(H) = 8.8061(2) and c(H) = 22.7638(7) Angstrom. The Na+ ion conduction was measured by the complex impedance method (frequency range: 0.1-10(5) Hz; temperature range: 20-500 degrees C) on four pellets previously sintered at 450, 750, 900 and 1000 degrees C. The conductivity data are discussed in relation to the sintering temperature. An activation energy of 0.60 eV for the movement of Na+ ions in the NASICON framework has been found.
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页码：127 / 134
页数：8
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