Design and synthesis of thermistor materials with high aging stability: Multicomponent equiatomic Mn-Co-Ni-Al-Zn-O ceramics. (1st March 2023)

• Record Type: Journal Article
• Authors: Fan, Liangchen; Yao, Jincheng; Huo, Peng; Wang, Bing; Liu, Zunjing; Zhao, Pengjun; Chang, Aimin; Wang, Junhua
• Is Part Of: Materials science in semiconductor processing. Volume 155(2023)
• Publication Date: 2023-03-01
• Subjects: NTC thermistors -- Electrical properties -- Microstructure -- Aging performance; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2022.107263
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: High entropy oxide (HEO) is a new class of ceramic materials. It is well known for its unique microstructure and remarkable property. In this work, a multicomponent equiatomic Mn–Co–Ni–Al–Zn–O oxide was synthesized using a solid-state reaction route based on entropic engineering. The phase composition of the samples was investigated, which showed the formation of two main phases: Fm 3 ‾ m for the rock salt phase and Fd 3 ‾ m for the spinel phase. In addition, the electrical behavior of Mn–Co–Ni–Al–Zn–O ceramic was investigated. The 5-cation ceramic exhibits extremely high aging stability with a resistance drift of 0.27% under accelerated aging conditions at 125 °C for 500 h. In contrast, the aging drift rate of the 4-cation samples is at approximately 2%. It was found that the design of multicomponent equiatomic oxide brings a significant benefit to the aging stability of the material. Thus, it provides an opportunity to improve the aging stability. Graphical abstract: Image 1 Highlights: We have successfully prepared a novel Mn–Co–Ni–Al–Zn–O multicomponent equiatomic ceramic. The complex-phase ceramic exhibits high thermal stability (ΔR/R0 = 0.27%) under accelerated aging conditions at 125 °C for 500 h. The electrical properties and conductivity mechanism of MCNAZ ceramic samples were analyzed for different sintering temperature (1200–1300 °C). It was found that the design of multicomponent equiatomic oxide brings a significant benefit to the aging stability of the material.