Dielectric relaxation studies of Bi-doping effects on the oxygen-ion diffusion in La2-xBixMo2O9 oxide-ion conductors

被引：84

作者：

Wang, XP ^{[1
]}

Fang, QF ^{[1
]}

Li, ZS ^{[1
]}

Zhang, GG ^{[1
]}

Yi, ZG ^{[1
]}

机构：

[1] Chinese Acad Sci, Key Lab Internal Frict & Defects Solids, Inst Solid State Phys, Hefei 230031, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 18期

关键词：

D O I：

10.1063/1.1518151

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Two dielectric relaxation peaks associated with oxygen-ion diffusion in the oxide-ion conductors La2-xBixMo2O9 (x=0.05, 0.1, and 0.15) have been studied. It is found that the activation energies of the two peaks increase with increasing Bi-doping concentration, which results from the blocking effects of the lone-pair electrons of Bi3+ ions. From the different effects of Bi doping on the two peaks, the diffusion paths of oxygen ions corresponding to each peak are confirmed. Significantly, it is revealed that Bi doping could enhance the ionic conductivity of La2Mo2O9 at lower temperatures. (C) 2002 American Institute of Physics.

引用

页码：3434 / 3436

页数：3

共 13 条

[1] Crystal structure of La2Mo2O9, a new fast oxide-ion conductor [J].

Goutenoire, F ;

Isnard, O ;

Retoux, R ;

Lacorre, P .

CHEMISTRY OF MATERIALS, 2000, 12 (09) :2575-2580

[2] DOPED LAGAO3 PEROVSKITE-TYPE OXIDE AS A NEW OXIDE IONIC CONDUCTOR [J].

ISHIHARA, T ;

MATSUDA, H ;

TAKITA, Y .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1994, 116 (09) :3801-3803

[3] Recent developments in perovskite-based oxide ion conductors [J].

Kendall, KR ;

Navas, C ;

Thomas, JK ;

zurLoye, HC .

SOLID STATE IONICS, 1995, 82 (3-4) :215-223

[4] Designing fast oxide-ion conductors based on La2Mo2O9 [J].

Lacorre, P ;

Goutenoire, F ;

Bohnke, O ;

Retoux, R ;

Laligant, Y .

NATURE, 2000, 404 (6780) :856-858

[5] Oxygen transport in La0.6Sr0.4Co0.2Fe0.8O3-δ [J].

Lane, JA ;

Benson, SJ ;

Waller, D ;

Kilner, JA .

SOLID STATE IONICS, 1999, 121 (1-4) :201-208

[6] CERAMIC FUEL-CELLS [J].

MINH, NQ .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1993, 76 (03) :563-588

[7] Ionic conductivity and relaxations in ZrO2-Y2O3 solid solutions [J].

Pimenov, A ;

Ullrich, J ;

Lunkenheimer, P ;

Loidl, A ;

Ruscher, CH .

SOLID STATE IONICS, 1998, 109 (1-2) :111-118

[8] The effect of pulse duration and oxygen partial pressure on La0.7Sr0.3CoO3-δ and La0.7Sr0.3Co0.2Fe0.8O3-δ films prepared by laser ablation [J].

Waller, D ;

Coccia, LG ;

Kilner, JA ;

Boyd, IW .

SOLID STATE IONICS, 2000, 134 (1-2) :119-125

[9] Mechanical and dielectric relaxation studies on the mechanism of oxygen ion diffusion in La2Mo2O9 -: art. no. 064304 [J].

Wang, XP ;

Fang, QF .

PHYSICAL REVIEW B, 2002, 65 (06) :1-6

[10] Effects of Ca doping on the oxygen ion diffusion and phase transition in oxide ion conductor La2Mo2O9 [J].

Wang, XP ;

Fang, QF .

SOLID STATE IONICS, 2002, 146 (1-2) :185-193

← 1 2 →