Abstract:
Glasses are disclosed which can be used to produce substrates for flat panel display devices, e.g., active matrix liquid crystal displays (AMLCDs). The glasses have MgO concentrations in the range from 1.0 mole percent to 3.0 mole percent and Σ[RO]/[Al2O3] ratios greater than or equal to 1.00, where [Al2O3] is the mole percent of Al2O3 and Σ[RO] equals the sum of the mole percents of MgO, CaO, SrO, and BaO. These compositional characteristics have been found to improve the melting properties of batch materials used to produce the glass, which, in turn, allows the glasses to be fined (refined) with more environmentally friendly fining agents, e.g., tin as opposed to arsenic and/or antimony.
Abstract translation:公开了可用于制造平板显示装置的基板的玻璃,例如有源矩阵液晶显示器(AMLCD)。 玻璃的MgO浓度范围为1.0摩尔%至3.0摩尔%,Sigma [RO] / [Al 2 O 3 3]比例大于或等于1.00, 其中[Al 2 O 3 3]是Al 2 O 3 3的摩尔百分数,Sigma [RO]等于 MgO,CaO,SrO和BaO的摩尔百分数之和。 已经发现这些组合特征提高了用于生产玻璃的批料的熔化性能,这又使玻璃用更环保的澄清剂(例如锡)与砷和/ 或锑。
Abstract:
A method for manufacturing an optical fiber preform and fiber. According to the method, a first glass rod is formed, preferably by an OVD method, with a refractive index delta preferably between 0.2% and 3%. A glass sleeve tube is formed, preferably by an MCVD or PVCD method. The first glass rod is inserted into the sleeve and an alkali metal vapor is flowed between the sleeve tube and the first glass rod. Additional glass may optionally be formed on the inside surface of the sleeve tube prior to inserting the first glass rod and flowing the alkali metal vapor. The additional glass may be up-doped, down-doped, or both. The sleeve may then be collapsed onto the first glass rod to form a second glass rod doped with an alkali metal oxide. The second glass rod is drawn to form a third glass rod. Additional glass may then be formed on the third glass rod to form an optical fiber preform from which optical fiber may be drawn. Alternatively, the first glass rod is removed from the sleeve tube after flowing the alkali metal vapor and before the collapse step, after which additional glass may be formed on the first glass rod to form an optical fiber preform.
Abstract:
The invention is directed to a glass-ceramic material suitable for use in the manufacturing of EUVL reflective optics. The glass-ceramic materials is made from a composition that comprises (in wt. %): SiO2=64-70; Al2O3=18-24; Li2O=1.6-3.8; MgO=0.8-1.5; ZnO=0.7-4.2; BaO=0.1-1.4; TiO2=2.0-3.5; ZrO2=1.25-2.5; As2O3=0.1-1.0; Na2O
Abstract translation:本发明涉及适用于制造EUVL反射光学器件的玻璃 - 陶瓷材料。 玻璃陶瓷材料由包含(重量%):SiO 2 = 64-70的组合物制成; Al 2 O 3 = 18-24; Li 2 O = 1.6-3.8; MgO = 0.8-1.5; ZnO = 0.7-4.2; BaO = 0.1-1.4; TiO 2 = 2.0-3.5; ZrO 2 = 1.25-2.5; 作为 u> O 3 = 0.1-1.0; Na 2 O <0.5; 和K <2
Abstract:
Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (d1) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.
Abstract:
A method for the production of glass suitable for use in an optical fiber, by (1) dissolving an optically active component in a solvent to form a solution; (2) mixing the solution and a powder substrate, wherein the powder substrate is insoluble in the solvent; and (3) melting the solution and powder substrate to form glass at a temperature or temperature range that causes melt viscosities at less than or equal to 100,000 poise. A glass made by such a method and an optical fiber comprising such a glass. An optical fiber having optically active ions having an unbleachable loss of 1% or less of the peak of absorption. Also, a method for the production of composition suitable for melting into a glass suitable for use in an optical fiber, by (1) dissolving an optically active component in a solvent to form a solution, wherein the optically active component is soluble in the solvent; and (2) mixing the solution and a powder substrate, wherein the powder substrate is insoluble in the solvent, and a composition made by such a method.
Abstract:
The invention is directed to ultra-low expansion glasses to which adjustments have been made to selected variables in order to improve the properties of the glasses, and particularly to lower the expansivity of the glasses. The glasses are titania-doped silica glasses. The variables being adjusted include an adjustment in β-OH level; an adjustment to the cooling rate of the molten glass material through the setting point; and the addition of selected dopants to impact the CTE behavior.
Abstract:
Numerous examples of a torque multiplier and associated methods are disclosed. In one example, a torque multiplier comprises a first shaft for providing a first torque; a second shaft for providing a second torque; and a gear structure coupled to the first shaft and the second shaft to multiply the first torque to generate the second torque, the gear structure comprising a lobe ring, a plurality of roll rings in contact with the lobe ring, a pin structure comprising a plurality of pins, each of the pins located inside one of the roll rings; and a bearing in contact with the plurality of roll rings.
Abstract:
An aluminum titanate ceramic article having a predominant crystal phase of aluminum titanate and a material composition including aluminum, titanium, silica, an alkaline earth metal (e.g., at least one selected from the group of strontium, calcium, barium, or combinations), and a rare earth metal (e.g., at least one selected from the group consisting of yttrium, lanthanum, and combinations) and methods of making such aluminum titanate bodies are described. An oxide of yttrium metal or lanthanide metals is preferably used as a sintering aid in combination with the other compositional components to enable firing of the resulting green body at a lower heating temperature of less than 1500° C., and more preferably between 1400°-1450° C., with a preferable hold time of less than 8 hours, more preferably of 6 to 8 hours.
Abstract:
A method of forming an oxide glass including heating a glass melt having a β—OH concentration of at least about 0.35 in a vessel comprising a metal selected from the group consisting of platinum, molybdenum, palladium, rhodium, and alloys thereof, there being an interface present between the vessel and the glass, and controlling a partial pressure of hydrogen in an atmosphere in contact with an outside surface of the vessel in an amount such that hydrogen permeation blisters form in a region of the glass adjacent the glass-vessel interface.
Abstract:
A method of making an alkali metal silicate glass includes preparing an alkali metal feedstock having a first desired level of alkali metal, the alkali metal feedstock being essentially free of an element that absorbs between 0.8 and 2.5 μm in any valence state. The method also includes combining and mixing the alkali metal feedstock with at least one silicate feedstock to form a precursor material having a second desired level of alkali metal and melting the precursor material to form molten glass.