利用红泥和瓷砖抛光废料制造自发泡玻璃陶瓷及其性能

IF 2.5 3区 材料科学 Q3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY Journal of Sustainable Metallurgy Pub Date : 2024-07-17 DOI:10.1007/s40831-024-00883-6
Jiahai Bai, Chengfeng Li, Qingyang Du, Cheng Dong
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引用次数: 0

摘要

以赤泥和瓷砖抛光废料为主要原材料,制备了自发泡玻璃陶瓷。详细研究了陶瓷中赤泥含量、烧结温度和浸泡时间对孔隙结构、孔径分布、总孔隙率、抗压强度和导热系数的影响。实验结果表明,制备的自发泡玻璃陶瓷均呈现出均匀的泡沫状结构。当赤泥含量从 15% 上升到 25%,再上升到 30% 时,样品的平均孔径和总孔隙率明显增加,然后急剧下降,而抗压强度和导热系数则先下降后上升。随着烧结温度从 1110 ℃ 升至 1140 ℃,浸泡时间从 30 分钟延长至 60 分钟,平均孔径和总孔隙率显著增加,而抗压强度和导热系数则明显下降。由 25 wt% 赤泥制成的自发泡玻璃陶瓷在 1130 ℃ 下烧结 45 分钟后表现出许多优异的性能,包括平均孔径为 0.99 mm,体积密度为 0.48 g/cm3,总密度为 79.6%,抗压强度高达 8.3 MPa,导热系数低至 0.08 W/m K。
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Fabrication and Properties of Self-foamed Glass Ceramics from Red Mud and Ceramic Tile Polishing Waste

Self-foamed glass ceramics were fabricated using red mud and ceramic tile polishing waste as main starting materials. Effects of red mud content in ceramics, sintering temperature and soaking time on pore structure, pore size distribution, total porosity, compressive strength and thermal conductivity were elaborately investigated. Experimental results revealed that the as-prepared self-foamed glass ceramics all exhibited homogenous foam-like structure. When the red mud content rose from 15 to 25 wt% and then up to 30 wt%, mean pore size and total porosity of the samples increased markedly and then decreased sharply, while compressive strength and thermal conductivity first decreased and then increased. As sintering temperature rose from 1110 to 1140 °C and soaking time extended from 30 to 60 min, respectively, mean pore size and total porosity increased remarkably, while compressive strength and thermal conductivity decreased appreciably. The self-foamed glass ceramics from 25 wt% red mud sintered at 1130 °C for 45 min exhibited many excellent properties including mean pore size of 0.99 mm, bulk density of 0.48 g/cm3, total density of 79.6%, high compressive strength of 8.3 MPa and low thermal conductivity of 0.08 W/m K, which made the as-fabricated self-foamed glass ceramics a good candidate material for external thermal insulator in buildings.

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来源期刊
Journal of Sustainable Metallurgy
Journal of Sustainable Metallurgy Materials Science-Metals and Alloys
CiteScore
4.00
自引率
12.50%
发文量
151
期刊介绍: Journal of Sustainable Metallurgy is dedicated to presenting metallurgical processes and related research aimed at improving the sustainability of metal-producing industries, with a particular emphasis on materials recovery, reuse, and recycling. Its editorial scope encompasses new techniques, as well as optimization of existing processes, including utilization, treatment, and management of metallurgically generated residues. Articles on non-technical barriers and drivers that can affect sustainability will also be considered.
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