摘要:
Disclosed is a method and apparatus for forming a circumferential skin surrounding a central cellular structure of an extruded honeycomb article. The method and apparatus may be used to produce defect-free skins and/or skins having large thickness and a high degree of particle alignment thereby preferably exhibiting CTE comparable to the extruded webs. These benefits are achieved by providing a die and method wherein a flow, Q, exiting any two active ones of a plurality of peripheral slots forming the skin is substantially equal. Also disclosed is a thick-skinned ceramic article having a thick extruded skin (ts′>5 tw′) with an I-value comparable to the webs.
摘要:
A process for producing a honeycomb ceramic article includes providing a green honeycomb body including ceramic-forming materials and organic pore forming materials and subjecting the green honeycomb body to a firing cycle in a kiln in which steam is added to the kiln atmosphere in an amount from about 10% to about 100%, based on volume. Also provided are ceramic articles produced by the process.
摘要:
Surface modification layers (30) and associated heat treatments, that may be provided on a sheet (20), a carrier (10), or both, to control both room-temperature van der Waals (and/or hydrogen) bonding and high temperature covalent bonding between the thin sheet and carrier. The room-temperature bonding is controlled so as to be sufficient to hold the thin sheet and carrier together during vacuum processing, wet processing, and/or ultrasonic cleaning processing, for example. And at the same time, the high temperature covalent bonding is controlled so as to prevent a permanent bond between the thin sheet and carrier during high temperature processing, as well as maintain a sufficient bond to prevent delamination during high temperature processing.
摘要:
Glass articles for use as covers in electronic devices and methods for forming the same are described herein. The glass articles generally include a shaped glass substrate comprising a first face, a second face and a perimeter edge. The shaped glass substrate may be formed from strengthened glass such that the shaped glass substrate has a compressive stress layer which improves the ability of the glass article to withstand surface damage without cracking. A polymer overmold is coupled to the attachment feature of the perimeter edge of the shaped glass substrate thereby protecting the perimeter edge of the shaped glass substrate from damage. In one embodiment, at least a portion of the perimeter edge of the shaped glass substrate comprises an attachment feature offset from the first face. In another embodiment the polymer overmold is integrally formed with at least one connector.
摘要:
One exemplary multimode optical fiber includes a graded index glass core having a diameter in the range of 41 microns to 80 microns, a graded index having an alpha less than 2.04 and a maximum relative refractive index in the range between 0.6% and 1.8%. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.5 GHz-km at at least one wavelength between 1200 nm and 1700 nm.
摘要:
One embodiment of a single mode optical fiber includes: a graded index central core region having outer radius r1 and relative refractive index Δ1; a cladding region comprising (i) a first inner cladding region having an outer radius r2 10 microns and comprising a minimum relative refractive index Δ3, wherein said second inner cladding region has at least one region with a relative refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the second inner cladding region and comprising relative refractive index Δ4, wherein Δ1>Δ2>Δ3, Δ3
摘要:
A graded index multimode optical fiber comprising: (a) a silica core doped with germania, and at least one co-dopant, comprising one of P2O5 or F or B2O3, the core extending to outermost core radius, r1 and having a dual alpha, α1; (b) a low index inner cladding surrounding the core and off-set from said core; (c) an outer cladding surrounding and in contact with the inner cladding, such that at least the region of the inner cladding off-set from said core has a lower refractive index than the outer cladding. The center germania concentration at the centerline, CGe1, is greater than or equal to 0, and an outermost germania concentration in the core CGe2, at r1 is greater than or equal to 0. The core has a center co-dopant concentration at the centerline, Cc-d1, greater than or equal to 0, and an outermost co-dopant concentration Cc-d2, at r1, wherein Cc-d2 is greater than or equal to 0.
摘要:
One embodiment of a single mode optical fiber includes: a graded index central core region having outer radius r1 and refractive index Δ1; a cladding region comprising (i) a first inner cladding region having an outer radius r2 10 microns and comprising a minimum refractive index Δ3, wherein said second cladding region has at least one region with a refractive index delta that becomes more negative with increasing radius; and (iii) an outer cladding region surrounding the inner cladding region and comprising refractive index Δ4, wherein Δ1>Δ2>Δ3, Δ3
摘要:
Disclosed are compositions for applying to honeycomb bodies. The compositions can be used as plugging mixtures for forming a ceramic wall flow filter. Alternatively, the compositions can be used to form skin coatings on exterior portions of a honeycomb body. The disclosed compositions include an inorganic powder batch composition, an organic binder, a liquid vehicle, and a rheology modifier. The compositions exhibit improved rheological properties, including an increased yield strength and reduced viscosity under shear, which, among various embodiments, can enable the manufacture of sintered phase end plugs having reduced levels of dimple and pinhole formations in the final dried and fired end plugs as well as end plugs having relatively uniform and desired depths. Also disclosed are methods for forming end plugged ceramic wall flow filters from the plugging mixtures disclosed herein.
摘要:
This disclosure is directed to laminates for transparent armor application and in particular to laminates comprising at least one layer of an intermediate or anomalous glass. Anomalous glasses include glasses with a SiO2 content (in mol %) greater than 80 mol %, and the glasses can contain other elements that give the glass highly desirable properties such as impact resistance. Examples include Corning ULE glass 4 wt % to