Role of waste glass as a fluxing agent in the sintering mechanism of porous ceramic aggregates from aluminium dross

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-06-01 DOI:10.1016/j.jeurceramsoc.2025.117587

Xinghan Huang , Fengyi Zhang , Xinyue Ma , Chiu Chuen Onn , Ying Pio Lim , Heng Kam Lim , Chou Yong Tan , Kim Hung Mo

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引用次数: 0

Abstract

This study presents an innovative approach to enhance the performance of porous ceramic aggregates (PCAs) produced from secondary aluminium dross (SAD) by incorporating waste glass powder (WGP). During the sintering process, aluminium nitride (AlN) in SAD acts as a pore-forming agent through its oxidation reaction, while the Na₂O and CaO in WGP serve as fluxing agents due to their low melting point. Mixtures containing 60 % brown clay and 40 % SAD with varying WGP contents (0–20 %) were sintered at 1150–1250 °C. The optimal addition of 15 % WGP resulted in the highest crushing strength of 5.3 MPa at 1200 °C and the lowest bulk density of 381 kg/m³ at 1250 °C. Microstructural observations confirmed a well-developed porous structure. Furthermore, heavy metal leaching concentrations were below regulatory limits, indicating environmental safety. These results demonstrate that incorporating WGP as a fluxing agent facilitates densification and pore formation, offering a sustainable route in PCAs production.

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废玻璃作为助熔剂在铝渣多孔陶瓷骨料烧结机理中的作用

本研究提出了一种创新的方法，通过加入废玻璃粉来提高由二次铝渣（SAD）生产的多孔陶瓷骨料（PCAs）的性能。在烧结过程中，SAD中的氮化铝（AlN）通过氧化反应起到成孔剂的作用，而WGP中的Na2O和CaO由于熔点较低而起到助熔剂的作用。含有60 %棕色粘土和40 % SAD的混合物，WGP含量（0-20 %）不同，在1150-1250 °C下烧结。当WGP的最佳添加量为15 %时，在1200 °C时，破碎强度最高，达到5.3 MPa；在1250 °C时，堆积密度最低，为381 kg/m3。显微结构观察证实了发育良好的多孔结构。此外，重金属浸出浓度低于规定限值，表明环境安全。这些结果表明，加入WGP作为助熔剂有助于致密化和孔隙形成，为PCAs的生产提供了一条可持续的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.