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The easily melting fluorine containing borophosphate glasses for construction knots have been obtained and investigated. The unique optical properties i.e. low refractive index - nD equals 1.41-1.45, wide spectral transparency region from 200 to 2000 nm as well as extended temperature application range from - 70 to +300 degree(s)C, thermostability and mechanical properties determine possibility to use fluorine containing borophosphate glass as optical glue. The process of structure formation within temperature range 20-1000 degree(s)C has been investigated in details. It has been determined by IR and X-ray methods that the development of glass network begins with decomposition of components at 500 degree(s)C with further formation of glass elements within temperature range 625-675 degree(s)C. The stable glassforming area is determined by P-O-B groups. The role of fluorine in structure development depends on its depolymerizator behavior, on the other hand it has some glassforming ability. Latter is based on ability of fluorine to move from boron to phosphorus coordination sphere. For the compositions under research the formation of monofluorophosphate groups at higher temperatures have been determined. The ratio P:B equals 1, 2:2 defines obtaining of stable glass without devitrification within the temperature range from 300 to 700 degree(s)C. The interfacial processes between fluorine containing melts and quartz fiber have been investigated.
Janina Setina,Juris J. Auzans, andJ. J. Zolotarjova
"Easily melting glass for assembly of optical fiber into connectors", Proc. SPIE 2290, Fiber Optic Materials and Components, (28 September 1994); https://doi.org/10.1117/12.187437
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Janina Setina, Juris J. Auzans, J. J. Zolotarjova, "Easily melting glass for assembly of optical fiber into connectors," Proc. SPIE 2290, Fiber Optic Materials and Components, (28 September 1994); https://doi.org/10.1117/12.187437