| Autor: |
Boris M. Goltsman, Elena A. Yatsenko |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Open Ceramics, Vol 17, Iss , Pp 100540- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2666-5395 |
| DOI: |
10.1016/j.oceram.2024.100540 |
| Popis: |
Flux materials enhance the energy efficiency of ceramic and glass-ceramic materials production. Traditional fluxes like feldspars and alkaline carbonates often require significant quantities (over 10 wt%) in raw mixtures. In contrast, borates and fluorides offer promising alternatives with strong fluxing effect. The fluxing effect of borates is based on the influence of their oxide constituents - Na2O and B2O3. Boron oxide acts as a glass-forming agent, leading to a formation of glassy phase at lower temperatures. Sodium oxide effectively depolymerizes silicon-oxygen network and reduces its melting temperature. The fluxing effect of fluorides is described by two primary hypotheses: the Dietzel-Buerger hypothesis, suggesting fluoride-induced depolymerization of silicon-oxygen network, and the Kogarko-Krigman hypothesis, proposing fluoride association with basic cations, affecting a microheterogeneity in silicate melts. However, the precise mechanism of fluoride fluxing effect still isn't created. The analysis of flux materials allows development of energy-efficient and cost-effective processes for silicate material synthesis. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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