Influence of calcium substitution on the phase transition and ionic conductivity in BICAVOX oxide ion conductor

被引：15

作者：

Beg, Saba ^{[1
]}

Hafeez, Shehla ^{[1
]}

Al-Areqi, Niyazi A. S. ^{[1
]}

机构：

[1] Aligarh Muslim Univ, Dept Chem, Aligarh 202002, Uttar Pradesh, India

来源：

PHASE TRANSITIONS | 2010年 / 83卷 / 03期

关键词：

BIMEVOX; phase transitions; AC impedance; ionic conductivity; COMPOSITION DEPENDENCE; ELECTRICAL-PROPERTIES; BIHFVOX SYSTEM; BIMEVOX SERIES; BI4V2O11; POLYMORPHISM; IMPEDANCE; CERAMICS; BEHAVIOR;

D O I：

10.1080/01411591003607263

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Samples of Bi4CaxV2-xO11-(3x/2)-delta in the composition range 0.07 <= x <= 0.30 were prepared by conventional solid state reactions. The stability of different phases as a function of composition was analysed by X-ray powder diffraction, FT-IR spectra, differential thermal analysis and AC impedance spectroscopy. For the compositions x <= 0.10, monoclinic alpha-phase structure is retained at room temperature. For x = 0.13, orthorhombic beta-phase is observed, whereas for x >= 0.17, high O2- conducting tetragonal gamma-phase is stabilised. However, the highest ionic conductivity sigma(300 degrees C) = 3.27 x 10(-4) S cm(-1) was observed for x = 0.17. This higher value of conductivity of the substituted compound as compared to the parent compound can be attributed to the increased oxygen ion vacancies generated as a result of cation doping. AC impedance spectroscopy reveals the fact that this ionic conductivity is mainly due to the grain contribution.

引用

页码：169 / 181

页数：13

共 32 条

[1] THE BIMEVOX SERIES - A NEW FAMILY OF HIGH PERFORMANCES OXIDE ION CONDUCTORS [J].

ABRAHAM, F ;

BOIVIN, JC ;

MAIRESSE, G ;

NOWOGROCKI, G .

SOLID STATE IONICS, 1990, 40-1 (pt 2) :934-937

[2] PHASE-TRANSITIONS AND IONIC-CONDUCTIVITY IN BI4V2O11 AN OXIDE WITH A LAYERED STRUCTURE [J].

ABRAHAM, F ;

DEBREUILLEGRESSE, MF ;

MAIRESSE, G ;

NOWOGROCKI, G .

SOLID STATE IONICS, 1988, 28 :529-532

[3] A model for the mechanism of low temperature ionic conduction in divalent-substituted γ-BIMEVOXes [J].

Abrahams, I ;

Krok, F .

SOLID STATE IONICS, 2003, 157 (1-4) :139-145

[4] Defect structure and ionic conductivity as a function of thermal history in BIMGVOX solid electrolytes [J].

Abrahams, I ;

Krok, F ;

Malys, M ;

Bush, AJ .

JOURNAL OF MATERIALS SCIENCE, 2001, 36 (05) :1099-1104

[5] Phase transition changes in Bi4CexV2-xO11-(x/2)-δ system [J].

Al-Areqi, Niyazi A. S. ;

Beg, Saba .

MATERIALS CHEMISTRY AND PHYSICS, 2009, 115 (01) :5-8

[6] Synthesis, sintering and electrical properties of P-doped Bi4V2O11 ceramics [J].

Alga, M ;

Ammar, A ;

Essalim, R ;

Tanouti, B ;

Mauvy, F ;

Decourt, R .

SOLID STATE SCIENCES, 2005, 7 (10) :1173-1179

[7]

AURIVILLIUS B, 1949, ARK KEMI, V0001

[8] Study on phase stability and ionic conductivity in HfIV-substituted bismuth vanadate [J].

Beg, Saba ;

Al-Areqi, Niyazi A. S. .

MATERIALS CHEMISTRY AND PHYSICS, 2009, 118 (01) :15-20

[9] Influence of dopant concentration on the phase transition and ionic conductivity in BIHFVOX system [J].

Beg, Saba ;

Al-Areqi, Niyazi A. S. ;

Al-Alas, Ahlam ;

Hafeez, Shehla .

PHYSICA B-CONDENSED MATTER, 2009, 404 (14-15) :2072-2079

[10] Structural and electrical study of CeIV-substituted bismuth vanadate [J].

Beg, Saba ;

Al-Areqi, Niyazi A. S. .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2009, 70 (06) :1000-1007

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