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Influence of additives on the crystallization and thermal conductivity of container glass cullet for foamed glass preparation

Influence of additives on the crystallization and thermal conductivity of container glass cullet for foamed glass preparation

Authors :
Matjaž Spreitzer
Jakob König
Uroš Hribar
Sonja Smiljanić
Source :
Ceramics International. 47:32867-32873
Publication Year :
2021
Publisher :
Elsevier BV, 2021.

Abstract

Foamed glass preparation is a complex combination of reactions, greatly influenced by the composition of the used glass and often hindered by simultaneous crystallization. The crystallization phenomenon is undesirable in foamed glass production since it decreases the quality of the final product. In this work the influence of different types of additives (foaming agents, flux agents, crystallization inhibitors and nucleating agent) on the crystallization of waste container glass and properties of the sintered samples (density and thermal conductivity) was studied. Results of our study confirmed partial crystallization during sintering stage. We found that waste container glass manifests complex crystallization with the formation of four main crystalline phases, which can be inhibited with the addition of fluxing agents (B2O3 and borax). Moreover, here we show that prevention of the crystallization can lead to a significant decrease of the thermal conductivity.

Details

ISSN :
02728842
Volume :
47
Database :
OpenAIRE
Journal :
Ceramics International
Accession number :
edsair.doi...........74d0636432237fa6a59908b732e5f328
Full Text :
https://doi.org/10.1016/j.ceramint.2021.08.183