Ba7Nb4-xCexMoO20: structural and electrical property studies of a novel NTC thermal ceramic

被引：0

作者：

Li, Jinyang ^{[1
,2
]}

Deng, Wenye ^{[3
]}

Xue, Yan ^{[1
]}

Ai, Ni ^{[1
,4
]}

Ding, Kai ^{[1
,2
]}

Chen, Xianghui ^{[5
]}

Meng, Weiwei ^{[1
]}

Zhao, Pengjun ^{[1
]}

Chang, Aimin ^{[1
]}

Xie, Yongxin ^{[1
]}

机构：

[1] Chinese Acad Sci, State Key Lab Funct Mat & Devices Special Environm, Xinjiang Key Lab Elect Informat Mat & Devices, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China

[2] Xinjiang Univ, Sch Mat Sci & Engn, Urumqi 830046, Peoples R China

[3] Xinjiang Inst Engn, Sch Chem & Environm Engn, Urumqi 830023, Xinjiang, Peoples R China

[4] Xinjiang Univ, Coll Chem, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830017, Xinjiang, Peoples R China

[5] Chongqing Mat Res Inst Co Ltd, Chongqing, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2024年 / 12卷 / 46期

关键词：

OXIDE-ION CONDUCTIVITY; BEHAVIOR; NI;

D O I：

10.1039/d4tc03449j

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hexagonal perovskite oxide Ba7Nb4MoO20 is widely studied in chemical devices due to its oxide-ionic conductivity at high temperatures. Ce4+ doping into Ba7Nb4MoO20 was undertaken to optimize small polariton conduction and oxide ionic conductivity simultaneously. Ba7Nb4-xCexMoO20 materials were synthesized via solid phase sintering. XRD patterns indicate a single phase, SEM scans reveal increased densification with higher Ce doping concentrations, and the resistance temperature range expands from 400-900 degrees C to 300-1100 degrees C. Hall tests confirm that Ba7Nb4-xCexMoO20 carriers are electrons, indicating n-type conductivity. Nyquist plots illustrate that grain boundary resistance governs complex impedance, which shows gradual oxide ionic conductivity enhancement with rising temperature. The aging drift rate decreases to about 1%, suggesting good stability of Ba7Nb4-xCexMoO20 ceramics. These findings propose a feasible doping strategy for enhancing hexagonal perovskite oxide ceramics.

引用

页码：18819 / 18828

页数：10

共 8 条

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