摘要:
Methods are described to make strong, tough, and lightweight whisker-reinforced glass-ceramic composites through a self-toughening structure generated by viscous reaction sintering of a complex mixture of oxides. The invention further relates to strong, tough, and lightweight glass-ceramic composites that can be used as proppants and for other uses.
摘要:
One embodiment of the disclosure relates to a method of cleaning silica-based soot or an article made of silica-based soot, the method comprising the step of treating silica-based soot or the article made of silica-based soot with at least one of the following compounds: (i) a mixture of CO and C1 2 in a carrier gas such that the total concentration of CO and C1 2 in the mixture is greater than 10 % (by volume, in carrier gas) and the ratio of CO:C1 2 is between 0.25 and 5; (ii) CC1 4 in a carrier gas, such that concentration CC1 4 is greater than 1 % (by volume, in carrier gas). Preferably, the treatment by CC1 4 is performed at temperatures between 600 °C, and 850 °C. Preferably, the treatment with the CO and Cl mixture is performed at temperatures between 900 °C and 1200 °C. The carrier gas may be, for example, He, Ar, N 2 , or the combination thereof.
摘要:
A method is described herein for sintering a frit to a glass plate where the sintered frit and glass plate are subsequently sealed to another glass plate to form a sealed glass package. Examples of the sealed glass package include a light-emitting device (e.g., organic light emitting diode (OLED) device), a photovoltaic device, a food container, and a medicine container.
摘要:
Es wird ein Verfahren angegeben, das die wirtschaftliche Herstellung von dotiertem Quarzglas ermöglicht, insbesondere von laseraktivem Quarzglas, das hinsichtlich der Homogenität der Dotierstoffverteilung verbessert ist, indem eine Suspension bereitgestellt wird, die SiO 2 -Teilchen sowie eine Ausgangsverbindung für mindestens einen Dotierstoff in einer wässrigen Flüssigkeit enthält, die Flüssigkeit unter Bildung eines dotierten Zwischenprodukts, das Teilchen des Dotierstoffs oder Teilchen einer Vorläufersubstanz des Dotierstoffs enthält, entfernt wird, und aus dem dotierten Zwischenprodukt durch Sintern das dotierte Quarzglas gebildet wird, wobei mindestens ein Teil der Teilchen des Dotierstoffs oder der Teilchen der Vorläufersubstanz desselben in der Suspension als Präzipitat einer pH-Wertgesteuerten Fällungsreaktion der Ausgangsverbindung erzeugt wird.
摘要:
Silica glass granule having the following features: Area: 100 to 5000 μm 2 , ECD: 5 to 100 μm, Circumference: 20 to 400 μm, Maximum diameter: 10 to 140 μm, Minimum diameter: 5 to 80 μm, where all values are medium values, Specific BET surface area: 2 /g Impurities: 800 μm, c) the slug fragments having a tamped density of 300 to 600 g/1, and d) subsequently treating them at 600 to 1100°C in an atmosphere which comprises one or more compounds which are suitable for removing hydroxyl groups, and e) then sintering them at 1200°C to 1400°C.
摘要:
A method for producing ultra-high purity, optical quality, glass articles is disclosed which involves: 1. compacting metaloxide or metal loidoxide to granules having a mean particle size of less than about 1 millimeter; 2. optionally fully sintering the granules to produce high purity, artificial sand; 3. casting the granulesar artificial sand by conventional techniques, such as, slip casting, to form a high density, porous, green body; 4. optionally drying and partially sintering the green body; 5. optionally fully sintering the green body under vacuum,- and 6. optionally hot isostatic pressing the fully sintered green body whereby the metal oxide or metalloid oxides is a pyrogenic silicon dioxide powder with a BET surface area of 30 to 90 m2/g, a DBP index of 80 or less, a mean aggregate area of less than 25000 nm2 and a mean aggregate circumference of less than 1000 nm, wherein at least 70% of the aggregates have a circumference of less than 1300 nm or a high-purity pyrogenically prepared silicon dioxide having metal contents of less than 0.2 µg/g.
摘要:
The present invention relates to refractory articles for guiding or conveying a solidified material comprising a vitreous silica basis, in particular rollers or guiding elements and to a process for the manufacture of said articles which do not show the pickup problems normally observed with the articles of the art. The refractory articles of the invention comprise a vitreous bases and, homogeneously distributed therein, a carbonaceous material.
摘要:
A luminescent element of next-generation optical device that by photoluminescence (PL), exhibits a large half-value width of emission spectrum in the wavelength region of visible light so as to realize broad light emitting characteristics and enables white light emission. Silica glass is produced through a firing operation for firing a product of pressure molding of silica microparticles such as fumed silica, wherein the firing temperature is regulated within a range not exceeding 1000°C so as to satisfactorily carry out dehydration condensation reaction with respect to OH groups of silica microparticles to thereby attain clearing and wherein amorphous defects having occurred during the reaction are retained without being reduced. This silica glass is used as a phosphor.
摘要:
Glasses and glass-ceramics comprising at least 75 percent by weight Al2O3, based on the total weight of the glass or glass-ceramic, respectively, and at least one metal oxide other than Al2O3. Glasses and glass-ceramics according to the present invention can be made, formed as, or converted into glass beads, articles (e.g., plates), fibers, particles, and thin coatings. Embodiments of glass-ceramic particles according to the present invention can be are particularly useful as abrasive particles.
摘要翻译:玻璃和玻璃陶瓷分别包含至少75重量%的Al 2 O 3,基于玻璃或玻璃陶瓷的总重量,以及至少一种除Al 2 O 3之外的金属氧化物。 根据本发明的玻璃和玻璃陶瓷可以制成,形成或转化成玻璃珠,制品(例如板),纤维,颗粒和薄涂层。 根据本发明的玻璃 - 陶瓷颗粒的实施方案可以特别用作磨料颗粒。