Macro-encapsulation of metal balls prepared by waste aluminum cans in ceramic capsules with reserved space

Xia, Qiulin; Zhang, Meijie; Gu, Huazhi; Stephen, Mweemba; Ye, Chengliang; Li, Haifeng; Liu, Xing

doi:10.1016/j.ceramint.2023.02.135

Ceramics International

2023

DOI: 10.1016/j.ceramint.2023.02.135

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Macro-encapsulation of metal balls prepared by waste aluminum cans in ceramic capsules with reserved space

Qiulin Xia

Meijie Zhang

Huazhi Gu

et al.

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Cited by 7 publications

References 27 publications

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Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Xu,

Shi,

et al. 2024

Adv Funct Materials

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Phase change materials (PCMs) have attracted increasing attention due to their efficient heat storage capability and small temperature fluctuation. And encapsulation has been recognized as an effective method to solve issues such as corrosion and leakage. For a long time, restricted by thermal expansion, encapsulation of PCMs has remained in the low‐temperature field and liquid‐state coating. In recent years, with the expansion of PCMs encapsulation into the medium and high temperature field and the development of solid‐state coating technology, encapsulation methods that consider thermal expansion have greatly improved the cycle life of encapsulated PCMs and make solid‐state coating of medium and high temperature PCMs possible. Herein, first, this paper summarizes the thermal expansion rates of common core and shell materials, as well as the thermal expansion behavior and stress analysis within confined spaces, proposing the necessity to solve thermal expansion issues. Subsequently, the solution strategies for solving thermal expansion issues in both macrocapsules and microcapsules are introduced. On this basis, the advantages and disadvantages of each strategy have been compared, and the applications of encapsulated PCMs after resolving thermal expansion issues have been introduced. Finally, the current issues, corresponding solutions, and future research directions have been put forward.

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Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Xu,

Shi,

et al. 2024

Adv Funct Materials

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Characteristics, Encapsulation Strategies, and Applications of Al and Its Alloy Phase Change Materials for Thermal Energy Storage: A Comprehensive Review

Shi,

Xu,

Guo

et al. 2024

Adv Funct Materials

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Among metal‐based phase change materials (PCMs), Al and its alloys have garnered significant attention due to their high latent heat and high thermal conductivity. However, challenges such as leakage, corrosion, and oxidation have limited their widespread application. Numerous researches have demonstrated that encapsulating Al and its alloy PCMs is one effective way to address these problems. This review provides a comprehensive overview of the characteristics, encapsulation strategies, and applications of Al and its alloy PCMs. First, the advantages and thermal properties of Al and its alloy PCMs are introduced, and their problems are then discussed. Subsequently, various encapsulation strategies that are expected to solve the above problems are summarized and compared. Additionally, the applications of Al and its alloy PCMs in solar thermal energy storage, catalysis, and electric vehicles are reviewed. Finally, current challenges, potential solutions, and the key direct of future study are presented.

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High‐Thermal‐Conductive AlN‐Shell‐Encapsulated Al Phase‐Change Macrocapsules for High‐Temperature Heat Storage

Guo,

Zhang

et al. 2024

Energy Tech

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High‐temperature metallic phase‐change material is a very promising material alternative to traditional sensible heat‐storage materials in thermal energy storage systems. Nevertheless, the challenges such as their susceptibility to corrosive behavior, vulnerability to leakage, and proneness to oxidation in high‐temperature liquid phase present significant constraints that hinder their widespread applications. In this article, an approach to fabricate millimeter‐scale phase‐change capsules for macroscopic encapsulation of Al with high‐thermal‐conductive AlN shell is introduced. The study encompasses the preparation of Al@AlN macrocapsules with inner cavity, which can accommodate thermal volume expansion, through the direct powder formation combined with a two‐step sintering process, under a comparative evaluation of the atmospheric treatments involving N2, O2, and Ar. As the result, a calcination temperature of 1000 °C in Ar atmosphere is proper for the capsule formation. The Al metal core of the as‐obtained capsule shows a latent heat of fusion of 347.4 J g−1 and a melting temperature of 655.6 °C. The Al@AlN capsules also exhibit good thermal and stability, ensuring their potential application in high‐temperature heat storage and utilization.

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Macro-encapsulation of metal balls prepared by waste aluminum cans in ceramic capsules with reserved space

Cited by 7 publications

References 27 publications

Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Characteristics, Encapsulation Strategies, and Applications of Al and Its Alloy Phase Change Materials for Thermal Energy Storage: A Comprehensive Review

High‐Thermal‐Conductive AlN‐Shell‐Encapsulated Al Phase‐Change Macrocapsules for High‐Temperature Heat Storage

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