Preparation of Solid Solutions [Li3xLa0.67-xYyTi1-2yNbyO3] and Its Lithium-ion Conductivity
来源期刊：JOURNAL OF RARE EARTHS2002年第5期
论文作者：王文继 陈睿婷 李荣华
Key words：rare earths; perovskite; bulk conductivity; fast ion conductor;
Abstract: Perovskite-type lithium fast ion conductors of Li3xLa0.67-xYyTi1-2yNbyO3 system were prepared by solid state reaction. X-Ray powder diffraction shows that a single-phase perovskite solid solution with orthorhombic structure forms in the ranges of x=0.10,y<0.075. Over this composition range the another phase, Y2O3 hexagonal phase is found. AC impedance measurements indicate that the bulk conductivities and the total conductivities are of the order of 10-4 S*cm-1 and 10-5 S*cm-1 at 25 ℃ respectively. The compositions have low bulk activation energies of about 20 kJ*mol-1 and total activation energies of about 40 kJ*mol-1 in the temperature range of 298～523 K, respectively.
王文继1，陈睿婷1，李荣华1
(1.Department of Chemistry,Fuzhou University,Fuzhou 350002, China)
Abstract:Perovskite-type lithium fast ion conductors of Li3xLa0.67-xYyTi1-2yNbyO3 system were prepared by solid state reaction. X-Ray powder diffraction shows that a single-phase perovskite solid solution with orthorhombic structure forms in the ranges of x=0.10,y<0.075. Over this composition range the another phase, Y2O3 hexagonal phase is found. AC impedance measurements indicate that the bulk conductivities and the total conductivities are of the order of 10-4 S*cm-1 and 10-5 S*cm-1 at 25 ℃ respectively. The compositions have low bulk activation energies of about 20 kJ*mol-1 and total activation energies of about 40 kJ*mol-1 in the temperature range of 298～523 K, respectively.
Key words:rare earths; perovskite; bulk conductivity; fast ion conductor;
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