Studies on synthesis, Raman, and electrical properties of novel spinel high entropy ceramics

IF 1.7 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Electroceramics Pub Date : 2024-10-08 DOI:10.1007/s10832-024-00370-0

Rajesh K. Mishra, E. B. Araújo, Rohit R. Shahi

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引用次数: 0

Abstract

Entropy-stabilized ceramics have attracted researchers significantly due to their potential vast multi-functional applications in various engineering fields. The present study emphasizes the synthesis, sintering temperature, Raman, and electrical behavior of a spinel (CoAlFeNTi)₃O₄ high entropy oxide (HEO). The HEO is synthesized through the modified solid-state reaction method at two different sintering temperatures (1100 °C and 1250 °C) and characterized further with the XRD, Raman, and SEM for structural and microstructural behavior. XRD analysis confirmed the formation of a single cubic spinel phase with the Fd-3 m space group. In addition, Raman analysis also confirmed that the synthesized HEOs have a spinel structure with an inverse spinel nature. With the enhancement of the sintering temperature, XRD analysis indicates that the crystallinity and crystallite size of the HEO enhanced. The current density (J) versus applied electric field (E) characteristics displayed that both 1100 °C and 1250 °C sintered HEOs possessed leakage current density at zero applied electric field and an ohmic conductance of \(\:4.59\times\:{10}^{-10}\) mhos/cm and \(\:3.43\times\:{10}^{-10}\) mhos/cm respectively. Moreover, J - E characteristics also showed that the enhancement of sintering temperature enhanced the resistive switching behavior of the different temperature sintered spinel HEOs. This improved resistive switching behavior in the J-E curve indicates that the synthesized spinel HEO can find potential application in resistive switching memory devices.

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新型尖晶石高熵陶瓷的合成、拉曼和电学性能研究

熵稳定陶瓷由于其在各个工程领域中具有广阔的多功能应用前景而备受关注。本研究着重研究了尖晶石（CoAlFeNTi）3O4高熵氧化物（HEO）的合成、烧结温度、拉曼和电学行为。在1100℃和1250℃两种不同烧结温度下，采用改进固相反应法制备了HEO，并用XRD、Raman和SEM对其结构和微观结构行为进行了表征。XRD分析证实形成了具有Fd-3 m空间基团的单一立方尖晶石相。此外，拉曼分析还证实了合成的HEOs具有尖晶石结构，具有反尖晶石性质。XRD分析表明，随着烧结温度的升高，HEO的结晶度和晶粒尺寸均有所提高。电流密度(J)与外加电场(E)特性表明，1100°C和1250°C烧结的heo在外加电场为零时具有泄漏电流密度，欧姆电导分别为\(\:4.59\times\:{10}^{-10}\) mhos/cm和\(\:3.43\times\:{10}^{-10}\) mhos/cm。此外，J - E特性还表明，烧结温度的提高增强了不同温度烧结尖晶石heo的电阻开关性能。J-E曲线阻性开关性能的改善表明，合成尖晶石HEO在阻性开关存储器件中具有潜在的应用前景。

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来源期刊

Journal of Electroceramics 工程技术-材料科学：硅酸盐

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

5.7 months

期刊介绍： While ceramics have traditionally been admired for their mechanical, chemical and thermal stability, their unique electrical, optical and magnetic properties have become of increasing importance in many key technologies including communications, energy conversion and storage, electronics and automation. Electroceramics benefit greatly from their versatility in properties including: -insulating to metallic and fast ion conductivity -piezo-, ferro-, and pyro-electricity -electro- and nonlinear optical properties -feromagnetism. When combined with thermal, mechanical, and chemical stability, these properties often render them the materials of choice. The Journal of Electroceramics is dedicated to providing a forum of discussion cutting across issues in electrical, optical, and magnetic ceramics. Driven by the need for miniaturization, cost, and enhanced functionality, the field of electroceramics is growing rapidly in many new directions. The Journal encourages discussions of resultant trends concerning silicon-electroceramic integration, nanotechnology, ceramic-polymer composites, grain boundary and defect engineering, etc.