Low-melting glasses represent itself a new class of perspective materials for means of instrument-making industry. Application of those materials could greatly lessen the energy consumption of its production. Low-melting glasses could be obtained by means of adding of heavy cations to the composition, for example such as lead and fluorine. The authors used the second method in their research. The behaviour of ions of fluorine depends upon the structure of oxide glasses. Adding of fluorides to boride glasses have an influence on the coordinate condition (state) of boron in application to oxygen (BO3 to give BO4). With forming of BO3 groups glass became more fusible. In the structure of silicate glasses fluoride groups acts autonomously whilst in phosphate based glasses the fluoride groups coexist together with phosphate (PO4) and fluorophosphate groups (PO3F). The structure of fluoraluminate glasses is based on AlF6 octahedrons, magnesium fluoride and yttrium fluoride polyhedrons. All the research was based on the representation, that the glass represents a superposition of structural grouping of combinations in the field of joint crystallisation of which the given composition is situated on the phase diagram.
Application of fluoride-containing glass & glass ceramics for architectural & automotive purposes
Anwendung Fluor-enthaltender Gläser und Glaskeramiken in der Architektur und Automobilindustrie
1997
2 Seiten
Conference paper
English
Automotive and architectural glass articles and laminates
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