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J. Korean Ceram. Soc. > Volume 59(4); 2022 > Article
Journal of the Korean Ceramic Society 2022;59(4): 444-452.
doi: https://doi.org/10.1007/s43207-022-00208-x
Production of high‑quality glass foam from soda lime glass waste using SiC‑AlN foaming agent
Ahmed A. M. El‑Amir1 , Mohammed A. A. Attia2, Thomas Fend3, Emad M. M. Ewais1
1Refractory and Ceramic Materials Department, Central Metallurgical Research and Development Institute, Cairo, Egypt
2Mechanical Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt
3German Aerospace Center (DLR), Cologne, Germany
Correspondence  Ahmed A. M. El‑Amir ,Email: elamirahmed.ahmed@gmail.com
Received: July 27, 2021; Revised: March 21, 2022   Accepted: April 4, 2022.  Published online: July 31, 2022.
ABSTRACT
This research presents the possibility of producing durable foam glasses from glass cullet using SiC/AlN foaming agent. The foaming agent generated by the SiC and AlN couple results in a more homogeneous microstructure and thus the emergence of foam glasses with better properties compared to the nitride foaming agent used alone in our previous work. The fabricated foam had a crack-free, 3-D cellular structure with macropores whose geometries varied between elliptical-, pentagonal-, and hexagonal-shaped constructions. It also had a lightweight (≥ 0.18 g/cm3), high cold crushing strength (≤4.5 MPa), low thermal conductivity (0.09–0.16 W/m K), and contained more than~89 vol.% gas bubbles enclosed between 11 vol.% impervious glass walls. The properties accomplished by the foam prepared in this work conform with the requirements of international standard for commercial glass foams, demonstrating its strong capability to be utilized in potential applications in sustainable buildings and energy efciency in industry.
Key words: Cellular glass foams · Recycled soda-lime glass waste · SiC/AlN foaming agent · 3-D cellular-like structure
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