Effect of CaO addition on the structure and electrical conductivity of the pyrochlore-type GdSmZr 2O 7

Zhan Guo Liu; Jia Hu Ouyang; Ke Ning Sun; Yu Zhou

doi:10.1016/j.ceramint.2011.11.070

Effect of CaO addition on the structure and electrical conductivity of the pyrochlore-type GdSmZr ₂O ₇

Zhan Guo Liu, Jia Hu Ouyang^*, Ke Ning Sun, Yu Zhou

^*Corresponding author for this work

Harbin Institute of Technology

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

12 Citations (Scopus)

Abstract

Polycrystalline GdSm _1-xCa _xZr ₂O _7-x/2 (0 ≤ x ≤ 0.20) ceramics have been prepared by the solid-state reaction method. The effects of CaO addition on the microstructure and electrical properties of the pyrochlore-type GdSmZr ₂O ₇ ceramic were investigated. GdSm _1-xCa _xZr ₂O _7-x/2 (x ≤ 0.05) ceramics exhibit a pyrochlore-type structure; however, GdSm _1-xCa _xZr ₂O _7-x/2 (0.10 ≤ x ≤ 0.20) ceramics consist of the pyrochlore-type structure and a small amount of CaZrO ₃. The total conductivity of GdSm _1-xCa _xZr ₂O _7-x/2 ceramics follows the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173 K. GdSm _1-xCa _xZr ₂O _7-x/2 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10 ^-4-1.0 atm at each test temperature. The highest total conductivity is about 1.20 × 10 ^-2 S cm ^-1 at 1173 K for the GdSm _0.9Ca _0.1Zr ₂O _6.95 ceramic.

Original language	English
Pages (from-to)	2935-2941
Number of pages	7
Journal	Ceramics International
Volume	38
Issue number	4
DOIs	https://doi.org/10.1016/j.ceramint.2011.11.070
Publication status	Published - May 2012
Externally published	Yes

Keywords

C. Electrical conductivity
GdSm Ca Zr O
Impedance spectroscopy
Solid electrolyte
Structure

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10.1016/j.ceramint.2011.11.070

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@article{2bf70d501fcb4b35b5dc5c3e9d2bedb3,

title = "Effect of CaO addition on the structure and electrical conductivity of the pyrochlore-type GdSmZr 2O 7 ",

abstract = "Polycrystalline GdSm 1-xCa xZr 2O 7-x/2 (0 ≤ x ≤ 0.20) ceramics have been prepared by the solid-state reaction method. The effects of CaO addition on the microstructure and electrical properties of the pyrochlore-type GdSmZr 2O 7 ceramic were investigated. GdSm 1-xCa xZr 2O 7-x/2 (x ≤ 0.05) ceramics exhibit a pyrochlore-type structure; however, GdSm 1-xCa xZr 2O 7-x/2 (0.10 ≤ x ≤ 0.20) ceramics consist of the pyrochlore-type structure and a small amount of CaZrO 3. The total conductivity of GdSm 1-xCa xZr 2O 7-x/2 ceramics follows the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173 K. GdSm 1-xCa xZr 2O 7-x/2 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10 -4-1.0 atm at each test temperature. The highest total conductivity is about 1.20 × 10 -2 S cm -1 at 1173 K for the GdSm 0.9Ca 0.1Zr 2O 6.95 ceramic.",

keywords = "C. Electrical conductivity, GdSm Ca Zr O, Impedance spectroscopy, Solid electrolyte, Structure",

author = "Liu, {Zhan Guo} and Ouyang, {Jia Hu} and Sun, {Ke Ning} and Yu Zhou",

year = "2012",

month = may,

doi = "10.1016/j.ceramint.2011.11.070",

language = "English",

volume = "38",

pages = "2935--2941",

journal = "Ceramics International",

issn = "0272-8842",

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TY - JOUR

T1 - Effect of CaO addition on the structure and electrical conductivity of the pyrochlore-type GdSmZr 2O 7

AU - Liu, Zhan Guo

AU - Ouyang, Jia Hu

AU - Sun, Ke Ning

AU - Zhou, Yu

PY - 2012/5

Y1 - 2012/5

N2 - Polycrystalline GdSm 1-xCa xZr 2O 7-x/2 (0 ≤ x ≤ 0.20) ceramics have been prepared by the solid-state reaction method. The effects of CaO addition on the microstructure and electrical properties of the pyrochlore-type GdSmZr 2O 7 ceramic were investigated. GdSm 1-xCa xZr 2O 7-x/2 (x ≤ 0.05) ceramics exhibit a pyrochlore-type structure; however, GdSm 1-xCa xZr 2O 7-x/2 (0.10 ≤ x ≤ 0.20) ceramics consist of the pyrochlore-type structure and a small amount of CaZrO 3. The total conductivity of GdSm 1-xCa xZr 2O 7-x/2 ceramics follows the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173 K. GdSm 1-xCa xZr 2O 7-x/2 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10 -4-1.0 atm at each test temperature. The highest total conductivity is about 1.20 × 10 -2 S cm -1 at 1173 K for the GdSm 0.9Ca 0.1Zr 2O 6.95 ceramic.

AB - Polycrystalline GdSm 1-xCa xZr 2O 7-x/2 (0 ≤ x ≤ 0.20) ceramics have been prepared by the solid-state reaction method. The effects of CaO addition on the microstructure and electrical properties of the pyrochlore-type GdSmZr 2O 7 ceramic were investigated. GdSm 1-xCa xZr 2O 7-x/2 (x ≤ 0.05) ceramics exhibit a pyrochlore-type structure; however, GdSm 1-xCa xZr 2O 7-x/2 (0.10 ≤ x ≤ 0.20) ceramics consist of the pyrochlore-type structure and a small amount of CaZrO 3. The total conductivity of GdSm 1-xCa xZr 2O 7-x/2 ceramics follows the Arrhenius relation, and gradually increases with increasing temperature from 723 to 1173 K. GdSm 1-xCa xZr 2O 7-x/2 ceramics are oxide-ion conductors in the oxygen partial pressure range of 1.0 × 10 -4-1.0 atm at each test temperature. The highest total conductivity is about 1.20 × 10 -2 S cm -1 at 1173 K for the GdSm 0.9Ca 0.1Zr 2O 6.95 ceramic.

KW - C. Electrical conductivity

KW - GdSm Ca Zr O

KW - Impedance spectroscopy

KW - Solid electrolyte

KW - Structure

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U2 - 10.1016/j.ceramint.2011.11.070

DO - 10.1016/j.ceramint.2011.11.070

M3 - Article

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SN - 0272-8842

VL - 38

SP - 2935

EP - 2941

JO - Ceramics International

JF - Ceramics International

IS - 4

ER -

Effect of CaO addition on the structure and electrical conductivity of the pyrochlore-type GdSmZr ₂O ₇

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