Effect of Fe incorporation on cation distributions and hopping conductions in Ni-Mn-Co-O spinel oxides

被引：47
作者：
Han, HyukSu [1 ]
Park, Kyoung Ryeol [2 ]
Hong, Yu-Rim [1 ,3 ]
Shim, Kwangbo [4 ]
Mhin, Sungwook [2 ]
机构：
[1] Korea Inst Ind Technol, 137-41 Gwahakdanji Ro, Gangneung Si 25440, Gangwon Do, South Korea
[2] Korea Inst Ind Technol, Gaetbeol Ro 156, Incheon 21999, South Korea
[3] Seoul Womens Univ, Dept Chem, Seoul 01795, South Korea
[4] Hanyang Univ, Dept Mat Sci & Engn, Seoul 04763, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 732卷
基金：
新加坡国家研究基金会;
关键词：
Fe-Ni-Mn-Co-O; Spinel oxide; Hopping conduction; Thermistors; ELECTRICAL-PROPERTIES; COLOSSAL PERMITTIVITY; THERMISTORS; CERAMICS;
D O I：
10.1016/j.jallcom.2017.10.216
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Effect of Fe incorporation on electrical properties of (NixCoyMn3-x-y)O-4 (NMC) spinel compound is investigated for the application to a negative temperature coefficient (NTC) thermistor. Cation distribution of the Fe doped NMC (FNMC) is calculated based on the size of ions located at tetragonal A sites and octahedral B sites in spinel structure, which can be closely related with temperature dependent electrical properties of the FNMC. With change of Fe contents, the ratio of Mn3+/Mn4+ in octahedral B site of FNMC is changed which can determine the temperature sensitivity factor (B-value). Hopping conduction mode relating with activation energy and hopping distance was also discussed depending on Fe contents, based on the small polaron hopping theory. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：486 / 490
页数：5
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