A method for producing a blank from titanium-doped, highly silicic-acidic glass having a specified fluorine content for use in EUV lithography is described, in which the thermal expansion coefficient over the operating temperature remains at zero as stably as possible. The course of the thermal expansion coefficient of Ti-doped silica glass depends on a plurality of influencing factors. In addition to the absolute titanium content, the distribution of the titanium is of significant importance, as is the ratio and distribution of additional doping elements, such as fluorine. In the method, fluorine-doped TiO.sub.2—SiO.sub.2 soot particles are generated and processed further via consolidation and vitrifying into the blank, and, by flame hydrolysis of input substances containing silicon and titanium, TiO.sub.2—SiO.sub.2-soot particles are formed, exposed to a reagent containing fluorine in a moving powder bed, and converted to the fluorine-doped TiO.sub.2—SiO.sub.2-soot particles.

Glass articles and methods for modifying a composition of a surface portion of the glass article are disclosed. The method includes heating the surface portion of the glass article with a laser beam to a temperature within a range of about 1100?C to about 2200?C such that the heating evaporates one or more metalloids and/or one or more alkali metals present at the surface portion, and modifies the composition of the surface portion such that the surface portion has a lower alkali metals concentration and/or a lower metalloids concentration as compared to a portion of the glass article that is not heated by the laser beam.

Borate-glass biomaterials comprising: aNa.sub.2O. bCaO. cP.sub.2O.sub.5. dB.sub.2O.sub.3 wherein a is from about 1-40 wt %, b is from about 10-40 wt %, c is from about 1-40 wt %, and d is from about 35-80 wt %; and wherein the biomaterial has a surface area per mass of more than about 5 m.sup.2/g. Methods of making and uses of these biomaterials.

Optical glass filters are provided that include a filter glass showing an optimized transmission spectrum which has a high transmission in the wave length range of 300 to 400 nm and a very low transmission in the visible wave length range. The glass has an especially high optical quality and is excellently suitable as an optical filter for generating UV light without a proportion of visible light. The optical glass filters include the components nickel oxide and cobalt oxide.

Methods for processing and or removing organic residuals and or impurities from a solgel-derived bioactive glass-ceramic and compositions comprising solgel-derived bioactive glass-ceramics processed using these methods, are described.

The invention relates to the use of lithium silicate glass ceramics and glasses with caesium oxide content, which are suitable in particular for veneering oxide ceramic restorations and metal restorations.

Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.

Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.

The present invention relates to a fertilizing composition comprising a glass matrix, wherein said glass matrix comprises: at least three forming oxides, wherein said at least three forming oxides are SiO.sub.2, P.sub.2O.sub.5 and B.sub.2O.sub.3, and have a ratio by weight between SiO.sub.2/P.sub.2O.sub.5 comprised from 1 to 5 and a ratio by weight between SiO.sub.2/B.sub.2O.sub.3 comprised from 5 to 25;—at least one microelement; said fertilizing composition optionally also comprising citric acid and/or at least one humic substance. The subject matter of the present invention further relates to an aggregate comprising said fertilizing composition, at least one thickening agent and optionally at least one further microelement that is identical to or different from the at least one microelement present within the glass matrix of the fertilizing composition. The present invention also relates to a method for fertilizing herbaceous and/or arboreal crops which comprises administering said composition or said aggregate to the crops. Finally, the present invention regards the use of the fertilizing composition or of the aggregate comprising said composition to fertilize herbaceous and/or arboreal crops.

A high temperature resistant inorganic fiber includes 72 to 77.3 weight percent silica; 10.2 to 15 weight percent magnesia; 12.4 to 17 weight percent calcia; 0 to 1.5 weight percent alumina; and 0 to 0.6 weight percent total alkali oxides; the fiber has a use temperature of at least 1260° C.; the fiber may exhibit a shrinkage of greater than 5% after exposure to a temperature of 1400° C. for 24 hours; and the fiber may have a melt temperature of less than 1400° C.