Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics

To develop a new kind of thermistor with the negative temperature coefficient (NTC) behaviour, the Cu/Mo co-doped YFeO3 based ceramics were prepared by wet-chemical synthesis and sintering at 1300°C. The orthorhombic perovskite structure was identified in all ceramics by XRD analysis. The possible v...

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Main Authors:	Zeng Yuan, Li Zhicheng, Gao Caiyun, Jiang Guoxiang, Zhang Hong
Format:	Article
Language:	English
Published:	University of Novi Sad 2021-06-01
Series:	Processing and Application of Ceramics
Subjects:	cu/mo co-doped yfeo3 electrical properties temperature sensitivity conduction mechanism
Online Access:	http://www.doiserbia.nb.rs/img/doi/1820-6131/2021/1820-61312102195Z.pdf

id	doaj-d526e6b095d94148be9486a3f1feb37a
record_format	Article
spelling	doaj-d526e6b095d94148be9486a3f1feb37a2021-08-16T11:28:09ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312406-10342021-06-0115219520110.2298/PAC2102195ZElectrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramicsZeng Yuan0Li Zhicheng1Gao Caiyun2Jiang Guoxiang3Zhang Hong4School of Materials Science and Engineering, Central South University, Changsha, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, ChinaSchool of Materials Science and Engineering, Central South University, Changsha, ChinaTo develop a new kind of thermistor with the negative temperature coefficient (NTC) behaviour, the Cu/Mo co-doped YFeO3 based ceramics were prepared by wet-chemical synthesis and sintering at 1300°C. The orthorhombic perovskite structure was identified in all ceramics by XRD analysis. The possible valence states of Fe, Cu and Mo in the doped YFeO3 compounds were examined by X-ray photoelectron spectroscopy. By adjusting the concentration of Cu- and Mo-ions, the room temperature resistivity (ρ25) and temperature-sensitive constant (B25/85) can be modified from 1.13×103 to 3.09×105 Ω•cm and 3000 to 7000K, respectively. The complex impedances at various temperatures (from 25 to 150°C) are tested and analysed. The results show that both grain and grain boundary exhibit the NTC characteristics. The electrical conduction mechanisms composing of polaron hopping conduction and band conduction were proposed in the YFeO3 based ceramics.http://www.doiserbia.nb.rs/img/doi/1820-6131/2021/1820-61312102195Z.pdfcu/mo co-doped yfeo3electrical propertiestemperature sensitivityconduction mechanism
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zeng Yuan Li Zhicheng Gao Caiyun Jiang Guoxiang Zhang Hong
spellingShingle	Zeng Yuan Li Zhicheng Gao Caiyun Jiang Guoxiang Zhang Hong Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics Processing and Application of Ceramics cu/mo co-doped yfeo3 electrical properties temperature sensitivity conduction mechanism
author_facet	Zeng Yuan Li Zhicheng Gao Caiyun Jiang Guoxiang Zhang Hong
author_sort	Zeng Yuan
title	Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics
title_short	Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics
title_full	Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics
title_fullStr	Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics
title_full_unstemmed	Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics
title_sort	electrical conductivity and temperature sensitivity of cu/mo co-modified yfeo3 ceramics
publisher	University of Novi Sad
series	Processing and Application of Ceramics
issn	1820-6131 2406-1034
publishDate	2021-06-01
description	To develop a new kind of thermistor with the negative temperature coefficient (NTC) behaviour, the Cu/Mo co-doped YFeO3 based ceramics were prepared by wet-chemical synthesis and sintering at 1300°C. The orthorhombic perovskite structure was identified in all ceramics by XRD analysis. The possible valence states of Fe, Cu and Mo in the doped YFeO3 compounds were examined by X-ray photoelectron spectroscopy. By adjusting the concentration of Cu- and Mo-ions, the room temperature resistivity (ρ25) and temperature-sensitive constant (B25/85) can be modified from 1.13×103 to 3.09×105 Ω•cm and 3000 to 7000K, respectively. The complex impedances at various temperatures (from 25 to 150°C) are tested and analysed. The results show that both grain and grain boundary exhibit the NTC characteristics. The electrical conduction mechanisms composing of polaron hopping conduction and band conduction were proposed in the YFeO3 based ceramics.
topic	cu/mo co-doped yfeo3 electrical properties temperature sensitivity conduction mechanism
url	http://www.doiserbia.nb.rs/img/doi/1820-6131/2021/1820-61312102195Z.pdf
work_keys_str_mv	AT zengyuan electricalconductivityandtemperaturesensitivityofcumocomodifiedyfeo3ceramics AT lizhicheng electricalconductivityandtemperaturesensitivityofcumocomodifiedyfeo3ceramics AT gaocaiyun electricalconductivityandtemperaturesensitivityofcumocomodifiedyfeo3ceramics AT jiangguoxiang electricalconductivityandtemperaturesensitivityofcumocomodifiedyfeo3ceramics AT zhanghong electricalconductivityandtemperaturesensitivityofcumocomodifiedyfeo3ceramics
_version_	1721205815056007168

Electrical conductivity and temperature sensitivity of Cu/Mo co-modified YFeO3 ceramics

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