Abstract:
A synthetic quartz powder obtained by calcining a powder of silica gel, characterized in that white devitrification spots having sizes of larger than 20 mu m in diameter formed in an ingot obtained by vacuum melting the synthetic quartz powder at a temperature of from 1780 to 1800 DEG C to form an ingot, followed by maintaining the ingot at a temperature of 1630 DEG C for 5 hours, are at most 10 spots/50 g.
Abstract:
A glass composite for use in Extreme Ultra-Violet Lithography (EUVL) is provided. The glass composite includes a first silica-titania glass section. The glass composite further includes a second doped silica-titania glass section mechanically bonded to a surface of the first silica-titania glass section, wherein the second doped silica-titania glass section has a thickness of greater than about 1.0 inch.
Abstract:
This invention relates to biocompatible and resorbable melt derived glass composition comprising: SiO 2 60-70 weight-%, Na 2 O 5-20 weight-%, CaO 5- 25 weight-%, MgO 0-10 weight-%, P 2 O 5 0.5-3.0 weight-%, B 2 O 3 0-15 weight-%, AI 2 O 3 0-5 weight-%, and comprising less than 0.05 weight-% potassium. This invention also relates to biocompatible and resorbable glass fibres manufactured from the glass compositions of the invention. This invention further relates to medical devices comprising fibres of the invention. This invention still further relates to use of the compositions of the invention for the manufacture of glass fibre and use of the fibres of the invention for the manufacture of medical devices.
Abstract translation:本发明涉及生物相容性和可再吸收的熔体衍生的玻璃组合物,其包含:SiO 2 60-70重量%,Na 2 O 5-20重量%,CaO 5-25重量%,MgO 0-10重量%,P 2 O 5 0.5-3.0重量 - %,B 2 O 3 0-15重量%,Al 2 O 3 0-5重量%,并且包含小于0.05重量%的钾。 本发明还涉及由本发明的玻璃组合物制造的生物相容性和可再吸收的玻璃纤维。 本发明还涉及包含本发明的纤维的医疗装置。 本发明还涉及本发明的组合物用于制造玻璃纤维的用途,以及本发明的纤维用于制造医疗装置的用途。
Abstract:
Disclosed is an optical fiber having a silica-based core and a silica-based cladding, the core comprising germania, and oxides of an alkali metal and phosphorous. By appropriately selecting the concentration of alkali metal and phosphorous oxides, fibers exhibiting low attenuation and low hydrogen aged attenuation may be obtained. In a preferred embodiment, the alkali metal oxide is potassium oxide (K 2 O).