Ionic and Electronic Conductivity of (Ho0.9Ca0.1)2Ti2O6.9 Pyrochlore

被引：4

作者：

Savvin, S. N. ^{[1
]}

Belov, D. A. ^{[2
]}

Shlyakhtina, A. V. ^{[3
]}

Shcherbakova, L. G. ^{[3
]}

Ruiz-Morales, J. C. ^{[1
]}

Nunez, P. ^{[1
]}

机构：

[1] Univ La Laguna, Dept Inorgan Chem, Tenerife 38200, Spain

[2] Moscow MV Lomonosov State Univ, Dept Chem, Moscow 119991, Russia

[3] Russian Acad Sci, Semenov Inst Chem Phys, Moscow 119991, Russia

来源：

SOLID OXIDE FUEL CELLS 11 (SOFC-XI) | 2009年 / 25卷 / 02期

关键词：

ORDER-DISORDER TRANSFORMATIONS; FUEL-CELL MATERIALS; PHASE-TRANSITIONS; TEMPERATURE; CONDUCTORS; TM; LU; YB; LN;

D O I：

10.1149/1.3205830

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Partial electronic conductivity of (Ho0.9Ca0.1)(2)Ti2O6.9 was determined at 750-900 degrees C by Hebb-Wagner polarization and reoxidation methods. The ion transference number in air was estimated to vary from 0.991 at 750 degrees C to 0.979 at 900 degrees C. The activation energies of the electron and hole conductivity at P(O-2)=1 atm were calculated to be 2.95 eV and 1.34 eV respectively.

引用

页码：2699 / 2706

页数：8

共 19 条

[1] Ionic and electronic conductivity of Yb2+xTi2-xO7-x/2 materials [J].

Abrantes, J. C. C. ;

Levchenko, A. ;

Shlyakhtina, A. V. ;

Shcherbakova, L. G. ;

Horovistiz, A. L. ;

Fagg, D. P. ;

Frade, J. R. .

SOLID STATE IONICS, 2006, 177 (19-25) :1785-1788

[2]

Chakomakos B. C., 1994, J SOLID STATE CHEM, V53, P1250

[3] Order-disorder transformations induced by composition and temperature change in (SczYb1-z)2Ti2O7 pyrochlores, prospective fuel cell materials [J].

Eberman, KW ;

Wuensch, BJ ;

Jorgensen, JD .

SOLID STATE IONICS, 2002, 148 (3-4) :521-526

[4] CONDUCTION IN TITANATE PYROCHLORES - ROLE OF DOPANTS [J].

KRAMER, S ;

SPEARS, M ;

TULLER, HL .

SOLID STATE IONICS, 1994, 72 :59-66

[5] A NOVEL TITANATE-BASED OXYGEN-ION CONDUCTOR - GD2TI2O7 [J].

KRAMERS, SA ;

TULLER, HL .

SOLID STATE IONICS, 1995, 82 (1-2) :15-23

[6]

Kroger FA, 1956, SOLID STATE PHYS, V3

[7] CHARACTERIZATION OF MIXED CONDUCTORS BY DC TECHNIQUES .1. THEORETICAL SOLUTIONS [J].

MARQUES, RMC ;

MARQUES, FMB ;

FRADE, JR .

SOLID STATE IONICS, 1994, 73 (1-2) :15-25

[8]

Moon P. K., MRS S P, V161, P149

[9] n-type conductivity in gadolinia-doped ceria [J].

Navarro, I ;

Marques, F ;

Frade, J .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (01) :267-273

[10] Incorporation of divalent ions in A2B2O7 pyrochlores [J].

Pirzada, M ;

Grimes, RW ;

Maguire, JF .

SOLID STATE IONICS, 2003, 161 (1-2) :81-91

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