Abstract:
The present invention is related to a method for preparing a fluoride glass gel comprising the following steps: a) providing an organometallic precursor compound; and b) reacting the organmetallic precursor compound with anhydrous HF; whereby the reaction of the organometallic precursor is carried out in a nonaqueous solvent.
Abstract:
Ceramics comprising (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) REO, or (c) at least one of ZrO2 or HfO2. Embodiments of ceramics according to the present invention can be made, formed as, or converted into optical waveguides, glass beads, articles (e.g., plates), fibers, particles (e.g., abrasive particles), and thin coatings.
Abstract translation:陶瓷,其包含(i)Nb 2 O 5或Ta 2 O 5中的至少一种和(ii)(a)Al 2 O 3,(b)REO或(c)ZrO 2或HfO 2中的至少一种中的至少一种。 根据本发明的陶瓷的实施例可以由玻璃珠,制品(例如板),纤维,颗粒(例如磨料颗粒)和薄涂层制成或形成光波导。
Abstract:
Ein bekanntes Verfahren zur Herstellung eines Quarzglasbauteils mit hoher thermischer Stabilität umfasst das Bereitstellen eines Basiskörpers, dessen Oberflache mindestens teilweise mit einer Schicht versehen wird, die ein Kristallisationspromotor-lon in einer Silicatverbindung enthält, wobei durch Erhitzen beim bestimmungsgemassen Einsatz des Quarzglasbauteils von der Schicht eine Cristobalitbildung ausgeht. Um dieses Verfahren hinsichtlich seiner Reproduzierbarkeit and Wirtschaftlichkeit zu verbessern, wird erfindungsgemäss vorgeschlagen, class durch Hydrolyse einer das Kristallisationspromotor-Ion and eine hydrolysierbare Siliciumverbindung enthaltenden Lösung ein Sol gebildet wird, in weichem kolloidale Teilchen der hydrolysierten Siliciumverbindung and des Kristallisationspromotor-Ions vorliegen, dass das Sol unter Bildung der Schicht auf der Basiskörper-Oberfläche aufgetragen wird, and class anschliessend durch Kondensation der hydrolysierten Siliciumverbindung unter Vernetzung der kolloidalen Teilchen eine Silicatbildung in der Schicht erfolgt.
Abstract:
Zur Verbesserung der Hochfrequenzeigenschaften von Hochfrequenz-Substraten oder HochfrequenzLeiteranordnungen wird ein Glasmaterial zur Herstellung von Isolationsschichten für Hochfrequenz-Substrate oder Hochfrequenz Leiteranordnungen vorgeschlagen, welches als aufgebrachte Schicht insbesondere mit einer Schichtdicke im Bereich zwischen 0,05 um bis 5 mm in zumindest einem Frequenzbereich to oberhalb von 1 GHz einen Verlustfaktor tan8 kleiner oder gleich 70*10- 4 aufweist.
Abstract:
Der Erfindung liegt daher die Aufgabe zugrunde, ein Substrat mit metallischer Fläche und glasartiger Beschichtung bereitzustellen. Dementsprechend sieht die Erfindung ein Verfahren zur Herstellung eines beschichteten Substrats, beziehungsweise eines Erzeugnisses mit einem beschichteten Substrat vor, welches zumindest eine mit einem Glas beschichtete metallische Fläche aufweist, wobei das Substrat zumindest auf der metallischen Fläche mit einem Aufdampfglas beschichtet wird.
Abstract:
The invention relates to a device for applying, in use, electromagnetic microwave radiation in a plasma cavity, which plasma cavity is present within a housing, being substantially cylindrically symmetric about a first axis, and which comprises a cylindrical wall provided with a circumferential slit, said plasma cavity being in communication, via said slit, with a first end of an elongated microwave guide having a longitudinally extending second axis, said device being in communication in use with microwave generating means via the other end of said microwave guide, in which the electromagnetic microwave radiation being generated may comprise several modes. The object of the invention is to provide a microwave applicator as referred to in the introduction, by means of which a stable plasma having the aforesaid advantageous geometric properties can be generated and maintained on the one hand and which furthermore does not have any restrictions as regards its constructional dimensions. In order to accomplish that objective, the microwave applicator is characterized in that the device comprises means which, in use, generate microwave radiation in the slit, which microwave radiation has only one electromagnetic field distribution at least in one direction perpendicularly to the propagation direction. Since the properties of the electromagnetic microwave radiation no longer constitute an unknown and unpredictable factor, a more stable and geometrically homogeneous plasma is generated in the plasma cavity.
Abstract:
The invention provides coated optical lithography elements and method of coating optical elements, and particularly optical photolithography elements for use in below 240 nm optical photolithography systems utilizing vacuum ultraviolet light, VUV, lithography wavelengths no greater than about 193 nm, such as VUV projection lithography systems utilizing wavelengths in the 193 nm or 157 nm region. The optical devices (42) manipulate vacuum ultraviolet lithography light less than 250 nm, utilizing a deposited silicon oxyfluoride film (26). The deposited silicon oxyfluoride optical coating assists in the manipulation of incident light and protects the underlying optical materials, layers, and surfaces.
Abstract:
A holographic light shaping diffuser (LSD) is formed from a monolithic glass material by recording light shaping structures (sometimes collectively known as "speckle", particularly when the structures extend into the interior of the diffuser) in the glass material during its formation. A volume LSD may be produced by the photolithographic writting or other imaging of light shaping structures in a photosentitive glass material, including the steps of providing a sol-gel solution (30), mixing (32) casting (34), gelling/aging (36), exposing (38), heating (40), and consolidating (42). Alternatively, a surface LSD may be produced by this imaging process or by embossing light shaping structures onto a high quality optical glass or by embossing a light shaping structures on a glass film layer coated onto a substrate. Both types of diffusers control the angular spread of transmitted light while homogenizing otherwise spatially noisy light sources such as LCDs and filamented light sources and while maintaining damage thresholds consistent with any glass optical element. The LSD has a transmission efficiency of over 90 % from the ultraviolet wavelengths through the physical spectrum and into the near-infrared. Moreover, because the LSD is a true glass, it is capable of withstanding temperatures well beyond glass transition temperatures of plastic LSDs, can be formed in convex or concave surfaces through conventional molding, grinding, or polishing techniques, and can be coated by hot-coating techniques. The LSD also has a very high laser power threshold.
Abstract:
A water-based paint composition, which has excellent adhesion to glass, comprising: (i) water-soluble sodium silicate forming 20 to 45 weight percent of said composition; (ii) water forming 5 to 25 weight percent of said composition; (iii) water-soluble base in an amount sufficient to provide said composition with a pH of at least 10.5; (iv) finely divided metal oxide powder selected from the group consisting of oxides of copper, iron, nickel, cobalt and mixtures thereof forming 20 to 45 weight percent of said composition and having a particle size, on average, less than 7 microns; (v) particles of soda-lime-silica glass forming 10 to 55 weight percent of the composition and having a diameter, on average, less than 20 microns and having a melting point of at least about 1700 DEG F; and at least one material selected from the group consisting of: (vi) low-melting glass frit powder melting below 1300 DEG F forming up to 10 weight percent of said composition and having a particle size, on average, less than 10 microns; and (vii) zinc oxide forming up to 10 weight percent of said composition.
Abstract:
Moulded bodies made of quartz glass with at least one surface region of tranparent quartz glass, whose free surfaces are smooth and which have a superficial microroughness of less than 8 mu m, are already known. To facilitate production of such a body having a simple structure, cost-effectively and without the need for the stocking or separate production of auxiliary components, it will consist of a core body, the base material of which is at least 99.9 % chemically pure and has a cristobalite content of no more than 1 %; is impermeable to gases, opaque, and porous, has a virtually constant direct spectral transmission in the wavelength range lambda = 190 nm - lambda = 2.650 nm of below 10 % for 1 mm of thickness, and has a density of at least 2.15 g/cm . The transparent surface region is formed from the base material which is heat treated at a temperature in excess of 1.650 DEG C, is at least 0.5 mm thick and has a direct spectral transmission of at least 60 % in the wavelength range lambda = 600 nm - lambda = 2.650 nm for 1 mm of thickness. The invention also relates to process for manufacturing a moulded body of this type from quartz glass.