TiO2 containing glass sealant for protonic ceramic fuel cell applications: Microstructure, strength and stability studied in sealing of BaZr0.1Ce0.7Y0.1Yb0.1O3-δ electrolyte to Crofer 22H interconnect

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-10-08 DOI:10.1016/j.ceramint.2024.10.035

Jianwei Gao, Xiaoqing Si, Bo Yang, Hao Yuan, Mushi Zheng, Chun Li, Junlei Qi, Jian Cao

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Abstract

To address the challenges of protonic ceramic fuel cell (PCFC) stack sealing, a TiO₂-containing alkaline silicate glass, named STKN, was utilized to seal the BaZr_0.1Ce_0.7Y_0.1Yb_0.1O_3-δ (BZCYYb) electrolyte and Crofer 22 H stainless steel, achieving a sufficient bonding. The formation of the BaTiSi₂O₇ reaction layer at the BZCYYb interface is the key to realizing effective joining. Elevating the joining temperature results in a thicker BaTiSi₂O₇ reaction layer and a concomitant loss of the sealant. The optimal sealing parameter is determined to be 775 °C for 30 min, yielding a maximum shear strength of 20 MPa. After aging in both oxidizing and reducing atmospheres at 600 °C for 300 h, the microstructure of the joint remained stable, suggesting excellent potential for service stability of the joint.

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用于质子陶瓷燃料电池的含 TiO2 玻璃密封剂：在将 BaZr0.1Ce0.7Y0.1Yb0.1O3-δ 电解质密封到 Crofer 22H 互连中研究微观结构、强度和稳定性

为了解决质子陶瓷燃料电池（PCFC）堆栈密封所面临的挑战，一种名为 STKN 的含 TiO2 碱性硅酸盐玻璃被用来密封 BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb) 电解质和 Crofer 22 H 不锈钢，从而实现了充分的结合。在 BZCYYb 界面形成 BaTiSi2O7 反应层是实现有效接合的关键。接合温度升高会导致 BaTiSi2O7 反应层变厚，密封剂随之流失。最佳密封参数为 775 °C 30 分钟，最大剪切强度为 20 兆帕。在 600 °C 的氧化和还原气氛中老化 300 小时后，接头的微观结构保持稳定，这表明接头具有极佳的使用稳定性。

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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.