Enhanced Sinterability and Conductivity Insights of Nb2O5 - Doped 8 mol% Yttria-Stabilized Zirconia: Implications for Low-Temperature Ceramic Electrolytes

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-09-13 DOI:10.1016/j.ceramint.2024.09.172

Naeemakhtar Momin, J. Manjanna, Satoru Kobayashi, S.T. Aruna, S. Senthil Kumar, Sandip Sabale, Rangappa S. Keri

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Abstract

The study explored the effect of incorporating niobia (Nb₂O₅) at 1, 3, and 5 weight percent into 8 mol% yttria-stabilized zirconia (8YSZ), made through a mechanochemical process. Niobia-doped 8YSZ samples were synthesized by a mechanochemical process and analyzed with methods including XRD, XPS, UV-Visible spectroscopy, particle size analysis, BET surface area analysis, FESEM-EDX, and EIS. Sintering was achieved at a reduced temperature of 1373 K, and all niobia-doped samples predominantly exhibited a tetragonal phase. Electrochemical impedance spectroscopy indicated that niobia doping inversely affected oxide ion conductivity-higher dopant concentrations resulted in lower conductivity. Nb-doped 8YSZ also displayed lower activation energy for conductivity compared to high-temperature (1473 K) sintered undoped 8YSZ, demonstrating equivalent performance. The combined benefits of lower sintering temperatures and enhanced ionic conductivities highlight crucial progress in developing cost-effective and energy-efficient electrolytes for clean energy applications.

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掺杂 8 mol% 钇稳定氧化锆的 Nb2O5 的烧结性和导电性增强观察：对低温陶瓷电解质的影响

该研究探讨了在通过机械化学工艺制作的 8 mol% 钇稳定氧化锆（8YSZ）中加入 1、3 和 5 重量百分比的铌铁矿石（Nb2O5）的效果。通过机械化学工艺合成了掺杂 Niobia 的 8YSZ 样品，并采用 XRD、XPS、紫外-可见光谱、粒度分析、BET 表面积分析、FESEM-EDX 和 EIS 等方法进行了分析。烧结是在 1373 K 的低温下进行的，所有掺杂铌元素的样品主要呈现四方相。电化学阻抗谱分析表明，掺杂铌元素对氧化物离子电导率的影响成反比--掺杂浓度越高，电导率越低。与高温（1473 K）烧结的未掺杂 8YSZ 相比，掺杂铌的 8YSZ 还具有更低的导电活化能，表现出同等的性能。较低的烧结温度和增强的离子电导率的综合优势凸显了在为清洁能源应用开发具有成本效益和能源效率的电解质方面取得的重要进展。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.