期刊
CERAMICS INTERNATIONAL
卷 47, 期 23, 页码 32867-32873出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.08.183
关键词
Glass crystallization; Foam glass; Waste glass
资金
- Slovenian Ministry of Education, Science and Sport [C3330-19-952051]
- Slovenian Research Agency [L2-9221]
- European Regional Development Fund [C3330-19-952051]
The study found that waste container glass undergoes partial crystallization during the sintering process, which can be inhibited by adding fluxing agents. This can lead to a significant decrease in thermal conductivity of the foamed glass.
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.
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