| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to fluoride optical glass capable of luminescence in the 1000-1700 nm range when excited with radiation with wavelength in the range of 400-1100 nm. The glass-forming components in the glass are BiF, ZrF, as well as fluorides of Li, Na, Al and Ba, and the luminescence source is bismuth in subvalent state. The glass can further contain BaFand/or LiF and/or NaF and/or AlF, with the following content of components (mol %): BiF1-50%, ZrF40-58%, BaF0-25%, LiF 0-20%, NaF 0-10%, AlF0-5%. The reducing agent used when producing the glass is NHF or NHHFor urea or bismuth metal. The method of producing optical glass involves preparing a mixture by mixing BiFand ZrFas glass-forming components with addition of a reducing agent, heating the obtained mixture in a medium of an inert gas to temperature of 700-900°C, holding the melt at said temperature until bismuth in subvalent state is obtained and rapid cooling of the obtained glass.EFFECT: making fibre-optic guides having low radiation leakage over long distances.9 cl, 7 ex, 2 dwg |
