摘要:
A manufacturing apparatus for manufacturing electronic monolithic ceramic components, including a sheet supplier for supplying a plurality of ceramic green sheets of a plurality of types in a predetermined order, and a laminator for laminating the ceramic green sheets supplied by the sheet supplier. A plurality of trays is set in two vertical columns in a rack which is vertically movable. Each tray holds a stack of a plurality of ceramic green sheets of the same type. A particular tray positioned to a predetermined level by the vertical movement of the rack is drawn by a tray drawer device, and one ceramic green sheet is picked up from the tray, and is then conveyed to the laminator. The utilization efficiency of area in the sheet supplier is thus increased.
摘要:
SiO2 slurry for the production of quartz glass contains a dispersion liquid and amorphous SiO2 particles with particle sizes to a maximum of 500 μm. The largest volume fraction is SiO2 particles with particle sizes of 1 μm-60 μm, as well as SiO2 nanoparticles with particle sizes less than 100 nm constituting 0.2-15% volume by weight of the entire solids content. To prepare the slurry for use and optimize its flow behavior for later processing by dressing or pouring the slurry mass, and for later drying and sintering without cracks, the slurry has SiO2 particles with a multimodal distribution of particle sizes, with a first maximum in the range 1 μm-3 μm and a second maximum in the range 5 μm-50 μm, and an 83%-90% solids content by weight of the SiO2 particles and the SiO2 nanoparticles together.
摘要:
Embodiments relate to a transparent body comprising a matrix material and a plurality of non-metal particles positioned in the matrix material. The matrix material may be selected from the group consisting of glass materials, ceramic materials, and semiconductor materials. The non-metal particles may have a mean particle size of no greater than 150 nm. The non-metal particles may be present in the body at a volume fraction of no greater than 3 percent. The non-metal particles may have a composition different than that of the matrix. Other embodiments are described and claimed.
摘要:
A process for producing a transparent or opaque silica glass product including mixing a silica fine powder and a cellulose derivative and injection molding the mixture, followed by degreasing treatment and baking treatment, which is characterized in that the cellulose derivative is a cellulose derivative which causes reversible thermal gelation in an aqueous solution of at least one member selected from methyl cellulose, hydroxypropylmethyl cellulose and hydroxyethylmethyl cellulose; in producing a transparent silica glass product, the cellulose derivative is added in water heated at a gelation temperature thereof or higher, and after cooling, the formed aqueous solution is kneaded with the silica fine powder; and in producing an opaque silica glass product, the cellulose derivative is added in a silica slurry containing a silica powder and heated at a gelation temperature of the cellulose derivative or higher.
摘要:
It has been discovered that aquagels, formed from acid catalized composite sols, survive to conditions of high-tension when they are prepared by a process that hydrolyzes the silicon alkoxides in presence of fumed silica.The aquagel can be used for the production of monoliths of glass.
摘要:
A method for cleaning a glass substrate containing SiO2 as a main ingredient thereof ensuring removal of abrasive and foreign matter adhered to the glass substrate after a polishing step, without complicating a cleaning step, including a process in which the glass substrate is cleaned by scrubbing using a liquid having Si element stationary in a range from 1 to 5 000 ppb/mm2.
摘要翻译:一种用于清洗含有SiO 2的玻璃基板作为主要成分的方法,其确保在抛光步骤之后除去粘附到玻璃基板上的磨料和异物,而不会使清洁步骤复杂化,包括其中 通过使用具有1至5 000ppb / mm 2范围内的Si元素静止的液体进行擦洗来清洁玻璃基板。
摘要:
A titania-doped quartz glass containing 3-12 wt % of titania at a titania concentration gradient less than or equal to 0.01 wt %/μm and having an apparent transmittance to 440 nm wavelength light of at least 30% at a thickness of 6.35 mm is of such homogeneity that it provides a high surface accuracy as required for EUV lithographic members, typically EUV lithographic photomask substrates.
摘要:
Particularly shaped articles constituted by silicon oxide, as such or with suitable additives, prepared by room temperature molding according to a process comprising: preparation of a sol starting from a silicon alcoxide, or from a silicon alcoxide and at least a precursor of at least one of the additional elements; hydrolysis of the sol obtained thereby; addition of colloidal silica; pouring the resulting mixture into the desired mould; sol gelling and fast removal of the solid product; gel drying; gel densification by means of a thermal treatment at temperature ranging from 900 ° C to 1500 ° C. The articles can be used as preforms for the optic fiber spinning.
摘要:
In the production of an organic-inorganic hybrid glassy material using raw materials which are used in a sol-gel process as starting materials, the present invention relates to a process for producing an organic-inorganic hybrid glassy material, which is characterized in that, there is a heating reaction step between a mixing step and a melting step of the starting materials and there is further an aging step after the melting step. In accordance with the present invention, an organic-inorganic hybrid glassy material satisfying both heat resistance as well as airtight property and low-melting characteristic, which has been believed to be very difficult to produce, is now able to be produced in a very shorter period than before.
摘要:
The present invention discloses a method for fabricating silica glass using a sol-gel process, which includes a sol forming step for forming a sol by mixing a starting material, deionized water and an additive together; gelation step for gelatinizing the sol after filling a circular mold with the gel produced; gel drying step for separating the gel from the circular mold and drying the gel; setting step for placing the gel inside of a heat chamber and injecting helium gas into the heat chamber; and low heat treatment step for pressurizing and depressurizing an internal pressure of the heat chamber repeatedly for several times.