Fabrication of Li4SiO4@Li2TiO3 core-shell tritium breeding materials with controlled thickness and improved moisture stability via a shrinkage matching process

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-09-01 DOI:10.1016/j.ceramint.2025.06.215

Ruichong Chen , Leiqing Tang , Yi Zuo , Jianqi Qi , Wei Feng , Haomin Wang , Zhangyi Huang , Tiecheng Lu

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引用次数: 0

Abstract

In this study, a shrinkage matching process was developed to achieve synchronous shrinkage of Li₄SiO₄ and Li₂TiO₃ during sintering, enabling the successful fabrication of a core-shell structured tritium breeder material with a Li₄SiO₄ core and Li₂TiO₃ shell to address the hygroscopicity of Li₄SiO₄. The shell thickness of the Li₄SiO₄@Li₂TiO₃ core-shell breeding materials can be controlled in the range of 0–235 μm, and their moisture stability was systematically investigated at 10 % RH, 50 % RH, and 80 % RH. Results showed that increasing shell thickness significantly enhanced phase and mechanical stability in humid environments, although excessively thick shells reduced overall Li content. To understand these improvements, the moisture stabilization mechanism of this core-shell breeding ceramics was comprehensively analyzed. Notably, the core-shell pebbles with a shell thickness of 146 μm exhibited a satisfactory crushing load (80.5 N) and a suitable Li content (16.87 wt%), and maintained superior moisture stability after storage at 80 % RH for 14 days. This novel concept, preparation route, and elucidated mechanism of utilizing Li₂TiO₃ shell to enhance the moisture stability of Li₄SiO₄ matrix provide a new strategy for performance enhancement of advanced tritium breeding materials.

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通过收缩匹配工艺制备具有控制厚度和改善水分稳定性的Li4SiO4@Li2TiO3核壳氚增殖材料

在本研究中，开发了一种收缩匹配工艺，以实现烧结过程中Li4SiO4和Li2TiO3的同步收缩，从而成功制备了具有Li4SiO4核和Li2TiO3壳的核-壳结构氚增殖材料，以解决Li4SiO4的吸湿性问题。Li4SiO4@Li2TiO3核壳复合材料的壳厚可控制在0 ~ 235 μm范围内，并在10% RH、50% RH和80% RH条件下对其水分稳定性进行了系统研究。结果表明，增加壳厚可显著提高湿润环境下的相稳定性和力学稳定性，但过厚的壳会降低总锂含量。为了了解这些改进，对该核-壳复合陶瓷的稳湿机理进行了全面分析。值得注意的是，壳厚为146 μm的核壳卵石具有良好的破碎负荷（80.5 N）和合适的锂含量（16.87 wt%），并且在80% RH条件下保存14天后保持了良好的水分稳定性。利用Li2TiO3壳增强Li4SiO4基质水分稳定性的新概念、制备路线和机理的阐明，为先进氚增殖材料的性能提升提供了新的策略。

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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.