Design, preparation and characterization of multiphase heat storage ceramic balls with high thermal shock resistance

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

Ceramics International Pub Date : 2025-06-01 DOI:10.1016/j.ceramint.2025.02.241

Jiamei Xu, Zijian Su, Jicheng Liu, Kun Lin, Yuanbo Zhang

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引用次数: 0

Abstract

With the improvement of industrial production requirements, the thermal shock resistance (TSR) of the materials used in industrial kilns plays a crucial role in ensuring efficient production. Aluminum-based heat storage ceramic balls (HSCB) are widely used in high-temperature industrial kilns, but they have a problem of weak TSR. A similar situation existed in the HSCB with corundum and Mg-Al spinel phases in our previous research. In this study, corundum-spinel-mullite HSCB was prepared using pre-treated secondary aluminum dross (SAD) as the main material at low roasting temperature. The effects of mullite content on the mechanical properties and microstructure of the HSCB were studied. Mullite whiskers were cross-distributed with corundum and Mg-Al spinel, which benefited the TSR. With the increase of mullite content, the structure of the HSCB gradually became loosely, the TSR increased and then decreased slightly, and linear crack density increased. When mullite content was about 25 %, the comprehensive performance of HSCB performed perfectly. Under the optimal conditions, the coefficient of thermal expansion of the HSCB was only 5.70 × 10⁻⁶ K⁻¹, the thermal conductivity reached 3.35 W/(m·K) and the TSR was 34 times. This study aimed to provide a theoretical reference for the preparation of aluminum-based ceramic HSCB, as well as to improve the high-value utilization of SAD.

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高抗热震多相储热陶瓷球的设计、制备与表征

随着工业生产要求的提高，工业窑炉所用材料的抗热震性（TSR）对保证高效生产起着至关重要的作用。铝基储热陶瓷球广泛应用于高温工业窑炉，但存在TSR较弱的问题。在我们之前的研究中，刚玉相和镁铝尖晶石相的HSCB也存在类似的情况。以预处理过的二次铝渣（SAD）为主要原料，在低温焙烧条件下制备刚玉-尖晶石-莫来石HSCB。研究了莫来石含量对HSCB力学性能和显微组织的影响。莫来石晶须与刚玉和镁铝尖晶石交叉分布，有利于TSR。随着莫来石含量的增加，HSCB的结构逐渐松散，TSR先增大后减小，线裂纹密度增大。当莫来石含量为25%左右时，HSCB的综合性能良好。在最佳条件下，HSCB的热膨胀系数仅为5.70 × 10−6 K−1，导热系数达到3.35 W/(m·K)， TSR为34倍。本研究旨在为铝基陶瓷HSCB的制备提供理论参考，并提高SAD的高价值利用率。

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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.