Influence of MoO3 doping on structure and electrical conductivity of defect fluorite-type Gd2Zr2O7

Zhan Guo Liu; Shuai Gao; Jia Hu Ouyang; Xiao Liang Xia

doi:10.1016/j.jallcom.2010.07.101

Influence of MoO₃ doping on structure and electrical conductivity of defect fluorite-type Gd₂Zr₂O₇

Zhan Guo Liu
, Shuai Gao
, Jia Hu Ouyang^*
, Xiao Liang Xia

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

In this paper, we report the preparation, structure and electrical conductivity of MoO₃-doped zirconates with a nominal chemical formula of Gd₂(Zr_1-xMo_x)₂O_7+2x (x = 0, 0.1, 0.2). X-ray diffraction measurements indicate that Gd ₂Zr₂O₇ exhibits a defect fluorite-type structure, and Gd₂(Zr_1-xMo_x)₂O _7+2x (x = 0.1, 0.2) have a single phase of pyrochlore-type structure. The alternating current (AC) impedance measurements show that the electrical conductivity of Gd₂(Zr_1-xNb_x)₂O _7+2x ceramics obeys the Arrhenius equation, and gradually increases with increasing temperature from 673 to 1173 K. The activation energy and pre-exponential factor for electrical conductivity gradually decrease with the increase of MoO₃ content. Gd₂(Zr_1-xMo _x)₂O_7+2x ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10^-4 to 1.0 atm at all test temperature levels. The electrical conductivity of defect fluorite-type Gd₂Zr₂O₇ is not improved by MoO₃ doping.

Original language	English
Pages (from-to)	868-871
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	506
Issue number	2
DOIs	https://doi.org/10.1016/j.jallcom.2010.07.101
State	Published - 17 Sep 2010

Keywords

Electrical conductivity
Electrolyte
Gd(ZrMo)O
Impedance spectroscopy

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10.1016/j.jallcom.2010.07.101

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@article{30ded90355464980baf88de141a3aa93,

title = "Influence of MoO3 doping on structure and electrical conductivity of defect fluorite-type Gd2Zr2O7",

abstract = "In this paper, we report the preparation, structure and electrical conductivity of MoO3-doped zirconates with a nominal chemical formula of Gd2(Zr1-xMox)2O7+2x (x = 0, 0.1, 0.2). X-ray diffraction measurements indicate that Gd 2Zr2O7 exhibits a defect fluorite-type structure, and Gd2(Zr1-xMox)2O 7+2x (x = 0.1, 0.2) have a single phase of pyrochlore-type structure. The alternating current (AC) impedance measurements show that the electrical conductivity of Gd2(Zr1-xNbx)2O 7+2x ceramics obeys the Arrhenius equation, and gradually increases with increasing temperature from 673 to 1173 K. The activation energy and pre-exponential factor for electrical conductivity gradually decrease with the increase of MoO3 content. Gd2(Zr1-xMo x)2O7+2x ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10-4 to 1.0 atm at all test temperature levels. The electrical conductivity of defect fluorite-type Gd2Zr2O7 is not improved by MoO3 doping.",

keywords = "Electrical conductivity, Electrolyte, Gd(ZrMo)O, Impedance spectroscopy",

author = "Liu, \{Zhan Guo\} and Shuai Gao and Ouyang, \{Jia Hu\} and Xia, \{Xiao Liang\}",

year = "2010",

month = sep,

day = "17",

doi = "10.1016/j.jallcom.2010.07.101",

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T1 - Influence of MoO3 doping on structure and electrical conductivity of defect fluorite-type Gd2Zr2O7

AU - Liu, Zhan Guo

AU - Gao, Shuai

AU - Ouyang, Jia Hu

AU - Xia, Xiao Liang

PY - 2010/9/17

Y1 - 2010/9/17

N2 - In this paper, we report the preparation, structure and electrical conductivity of MoO3-doped zirconates with a nominal chemical formula of Gd2(Zr1-xMox)2O7+2x (x = 0, 0.1, 0.2). X-ray diffraction measurements indicate that Gd 2Zr2O7 exhibits a defect fluorite-type structure, and Gd2(Zr1-xMox)2O 7+2x (x = 0.1, 0.2) have a single phase of pyrochlore-type structure. The alternating current (AC) impedance measurements show that the electrical conductivity of Gd2(Zr1-xNbx)2O 7+2x ceramics obeys the Arrhenius equation, and gradually increases with increasing temperature from 673 to 1173 K. The activation energy and pre-exponential factor for electrical conductivity gradually decrease with the increase of MoO3 content. Gd2(Zr1-xMo x)2O7+2x ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10-4 to 1.0 atm at all test temperature levels. The electrical conductivity of defect fluorite-type Gd2Zr2O7 is not improved by MoO3 doping.

AB - In this paper, we report the preparation, structure and electrical conductivity of MoO3-doped zirconates with a nominal chemical formula of Gd2(Zr1-xMox)2O7+2x (x = 0, 0.1, 0.2). X-ray diffraction measurements indicate that Gd 2Zr2O7 exhibits a defect fluorite-type structure, and Gd2(Zr1-xMox)2O 7+2x (x = 0.1, 0.2) have a single phase of pyrochlore-type structure. The alternating current (AC) impedance measurements show that the electrical conductivity of Gd2(Zr1-xNbx)2O 7+2x ceramics obeys the Arrhenius equation, and gradually increases with increasing temperature from 673 to 1173 K. The activation energy and pre-exponential factor for electrical conductivity gradually decrease with the increase of MoO3 content. Gd2(Zr1-xMo x)2O7+2x ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10-4 to 1.0 atm at all test temperature levels. The electrical conductivity of defect fluorite-type Gd2Zr2O7 is not improved by MoO3 doping.

KW - Electrical conductivity

KW - Electrolyte

KW - Gd(ZrMo)O

KW - Impedance spectroscopy

UR - https://www.scopus.com/pages/publications/77956456116

U2 - 10.1016/j.jallcom.2010.07.101

DO - 10.1016/j.jallcom.2010.07.101

M3 - 文章

AN - SCOPUS:77956456116

SN - 0925-8388

VL - 506

SP - 868

EP - 871

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 2

ER -

Influence of MoO₃ doping on structure and electrical conductivity of defect fluorite-type Gd₂Zr₂O₇

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