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Fabrication of lightweight ceramics of complex geometries in freezing weather
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4888-6237
2024 (English)In: Materials letters (General ed.), ISSN 0167-577X, E-ISSN 1873-4979, Vol. 368, article id 136633Article in journal (Refereed) Published
Abstract [en]

A stable aqueous-based alumina slurry (16 vol%) was formulated and frozen at −10 to −25 °C in natural freezing environment. The thermally treated ceramic monoliths achieved ∼82–88 vol% porosity with short-range aligned pores. Finally, the unidirectional pores in the structure are achieved using a mold with thermal insulation properties. Natural freezing saves 300 kJ of energy per kg of alumina slurry. Mechanically stable lightweight porous ceramics with complex geometries can be designed without cryogenic fluids, refrigeration, or thermal baths. Implementing natural freezing in the porous ceramics industries, particularly in the Arctic region, will bring forward a sustainable approach by reducing energy consumption and CO2 emissions.

Place, publisher, year, edition, pages
Elsevier B.V. , 2024. Vol. 368, article id 136633
Keywords [en]
Arctic region, Freeze casting, Natural weather, Porous ceramic
National Category
Materials Engineering Chemical Sciences
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-105844DOI: 10.1016/j.matlet.2024.136633Scopus ID: 2-s2.0-85193840634OAI: oai:DiVA.org:ltu-105844DiVA, id: diva2:1865582
Funder
The Kempe Foundations, SMK 21-002
Note

Full text license: CC BY

Available from: 2024-06-05 Created: 2024-06-05 Last updated: 2024-06-05

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Hossain, SK SaddamAkhtar, Farid

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3334353637383936 of 79
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