Patent application number | Description | Published |
20090069163 | TOUGH CORDIERITE GLASS-CERAMICS - An internally nucleated, toughened cordierite glass-ceramic is disclosed. The cordierite glass-ceramic has good oxidation resistance and fracture toughness and coefficient of thermal expansion rivaling that of silicon nitride. The glass-ceramic may be cast as a liquid. Annealing produces a material of high crystallinity combining high hardness, high Young's modulus, good thermal stability, high strength, low density and good dielectric properties. The glass-ceramic comprises interlocking crystalline phases dominated by cordierite and a second phase having an elongated or acicular structure. A third phase may comprise a crystalline ceramic that promotes acicularity of the second phase. The third phase is preferably capable of twinning. | 03-12-2009 |
20090274869 | COLORED MACHINABLE GLASS-CERAMICS - The invention relates to opaque, colored glass-ceramic articles and to the production of opaque, colored glass-ceramic articles which can be readily formed to a desired shape using standard metal-working tools. The glass-ceramic material used to make such articles contains mica crystals as the predominant phase. The desired color is obtained through the addition of a colorant system to the precursor glass. In a particular embodiment the invention is directed to a black glass-ceramic article, the black color being obtained by the addition of iron oxides in levels as high as 20 wt %, which can yield a glass-ceramic having an iron-rice mica phase and/or a glass ceramic having an iron-rich mica phase plus an iron oxide phase. | 11-05-2009 |
20090297764 | Stablized Low-Microcracked Ceramic Honeycombs And Methods Thereof - Disclosed are stabilized, high-porosity cordierite honeycomb substrates having little or no microcracking, and a high thermal shock resistance. The porous ceramic honeycomb substrates generally comprise a primary cordierite ceramic phase as defined herein. Also disclosed are methods for making and using the cordierite substrates. | 12-03-2009 |
20090318277 | HIGH STRENGTH MACHINABLE GLASS-CERAMICS - In one aspect the invention is directed to a machinable glass-ceramic having a high degree of crystallinity (greater than 50 Vol. %), high mechanical strength (MOR>150 MPa) In accordance with the invention, the machinable glass-ceramics described herein consists essentially of, in weight percent, 35-55% SiO | 12-24-2009 |
20100326029 | Permeable Material, Articles made therefrom and method of manufacture - The invention is directed to a honeycomb comprising cordierite and beta-spudomene, the honeycomb a having total porosity of greater than 30% and a mean pore diameter of less than 5 μm. The honeycomb is made from a mixture of activated kaolin and a mineral selected from the group consisting of lithium fluorhectorite, lithium hydroxyhectorite and mixtures thereof. In one embodiment up to 20 wt % SiO2, based on the total weight of the kaolin and minerals (fluarhectorite, hydroxyhectorite) is added and mixed therein prior to the formation of the green body. In another embodiment the amount of added SiO2 is up to 10 wt %. In one embodiment the total porosity is greater than 50% and the mean pore diameter is less than 5 μm. | 12-30-2010 |
20110092353 | DURABLE GLASS-CERAMIC HOUSINGS/ENCLOSURES FOR ELECTRONIC DEVICE - The invention relates glass ceramic articles suitable for use as electronic device housing or enclosures which comprise a glass-ceramic material. Particularly, a glass-ceramic article housing/enclosure comprising a glass-ceramic material exhibiting both radio and microwave frequency transparency, as defined by a loss tangent of less than 0.5 and at a frequency range of between 15 MHz to 3.0 GHz, a fracture toughness of greater than 1.5 MPa·m | 04-21-2011 |
20110129640 | METHOD AND BINDER FOR POROUS ARTICLES - A method for making porous articles, including: depositing a powder mixture layer comprising a binder powder, and at least one structural powder; contacting the powder mixture layer and an aqueous liquid to selectively activate the binder powder and form a green layer; repeating the depositing and the contacting sequence at least one time; and de-powdering and drying of the resulting green body. The binder powder can include, for example, a protein that is soluble in water at or below about 25° C. The disclosure also provides articles, having high porosity and optionally intricate 3D structures, as defined herein. | 06-02-2011 |
20110130264 | NEGATIVE-CTE GLASS-CERAMICS FREE OF MICROCRACKS - A glass-ceramic composition, an article, and methods of making and using the composition and article as defined herein. The glass-ceramic compositions and articles have negative-CTE and are substantially free of microcracks. | 06-02-2011 |
20110319253 | HIGH STRENGTH MACHINABLE GLASS-CERAMICS - In one aspect the invention is directed to a machinable glass-ceramic having a high degree of crystallinity (greater than 50 Vol. %), high mechanical strength (MOR>150 MPa) In accordance with the invention, the machinable glass-ceramics described herein consists essentially of, in weight percent, 35-55% SiO | 12-29-2011 |
20120135848 | FUSION FORMED AND ION EXCHANGED GLASS-CERAMICS - The present disclosure relates to fusion formable highly crystalline glass-ceramic articles whose composition lies within the SiO | 05-31-2012 |
20130119356 | OPAL GLASSES FOR LIGHT EXTRACTION - Opal glass compositions and devices incorporating opal glass compositions are described herein. The compositions solve problems associated with the use of opal glasses as light-scattering layers in electroluminescent devices, such as organic light-emitting diodes. In particular, embodiments solve the problem of high light absorption within the opal glass layer as well as the problem of an insufficiently high refractive index that results in poor light collection by the layer. Particular devices comprise light-emitting diodes incorporating light scattering layers formed of high-index opal glasses of high light scattering power that exhibit minimal light attenuation through light absorption within the matrix phases of the glasses. | 05-16-2013 |
20130137010 | REACTIVE SINTERING OF CERAMIC LITHIUM-ION SOLID ELECTROLYTES - A method of forming a solid, dense, hermetic lithium-ion electrolyte membrane comprises combing an amorphous, glassy, or low melting temperature solid reactant with a refractory oxide reactant to form a mixture, casting the mixture to form a green body, and sintering the green body to form a solid membrane. The resulting electrolyte membranes can be incorporated into lithium-ion batteries. | 05-30-2013 |
20130160412 | PERMEABLE MATERIAL, ARTICLES MADE THEREFROM AND METHOD OF MANUFACTURE - The invention is directed to a honeycomb comprising cordierite and β-spudomene, the honeycomb having a having total porosity of greater than 30% and a mean pore diameter of less than 5 μm. The honeycomb is made from a mixture of activated kaolin and a mineral selected from the group consisting of lithium fluorhectorite, lithium hydroxyhectorite and mixtures thereof. In one embodiment up to 20 wt % weight SiO | 06-27-2013 |
20130274085 | WHITE, OPAQUE BETA-SPODUMENE/RUTILE GLASS-CERAMIC ARTICLES AND METHODS FOR MAKING THE SAME - Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO | 10-17-2013 |
20130296155 | WHITE, OPAQUE, -SPODUMENE/RUTILE GLASS-CERAMICS; ARTICLES COMPRISING THE SAME; AND METHODS FOR MAKING THE SAME - Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO | 11-07-2013 |
20140001485 | GLASS-CERAMIC SUBSTRATES FOR SEMICONDUCTOR PROCESSING | 01-02-2014 |
20140057092 | WHITE, OPAQUE, -SPODUMENE/RUTILE GLASS-CERAMIC ARTICLES AND METHODS FOR MAKING THE SAME - Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit β-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole %, include: 62-75 SiO | 02-27-2014 |
20140066285 | COLORED AND OPAQUE GLASS-CERAMIC(S), ASSOCIATED COLORABLE AND CERAMABLE GLASS(ES), AND ASSOCIATED PROCESS(ES) - Disclosed herein are glass-ceramics having crystalline phases including β-spodumene ss and either (i) pseudobrookite or (ii) vanadium or vanadium containing compounds so as to be colored and opaque glass-ceramics having coordinates, determined from total reflectance—specular included—measurements, in the CIELAB color space of the following ranges: L*=from about 20 to about 45; a*=from about −2 to about +2; and b*=from about −12 to about +1. Such CIELAB color space coordinates can be substantially uniform throughout the glass-ceramics. In each of the proceeding, β-quartz ss can be substantially absent from the crystalline phases. If present, β-quartz ss can be less than about 20 wt % or, alternatively, less than about 15 wt % of the crystalline phases. Also Further crystalline phases might include spinel ss (e.g., hercynite and/or gahnite-hercynite ss), rutile, magnesium zinc phosphate, or spinel ss (e.g., hercynite and/or gahnite-hercynite ss) and rutile. | 03-06-2014 |
20140105953 | ANTIMICROBIAL GLASS-CERAMICS - The application discloses the formation of antimicrobial glass-ceramic articles having an amorphous phase and a crystalline phase and an antimicrobial agent selected from the group consisting of silver, copper and a mixture of silver and copper. The antimicrobial glass-ceramic can have a Log Reduction of >2. | 04-17-2014 |
20140134397 | DURABLE GLASS CERAMIC COVER GLASS FOR ELECTRONIC DEVICES - The invention relates to glass articles suitable for use as electronic device housing/cover glass which comprise a glass ceramic material. Particularly, a cover glass comprising an ion-exchanged glass ceramic exhibiting the following attributes (1) optical transparency, as defined by greater than 90% transmission at 400-750 nm; (2) a fracture toughness of greater than 0.6 MPa·m | 05-15-2014 |
20140243183 | FUSION FORMABLE LITHIUM ALUMINOSILICATE GLASS CERAMIC - A down-drawable glass ceramic. The glass ceramic has a composition which yields a liquidus viscosity that enables formation of the parent glass by down-draw techniques such as fusion-draw and slot-draw methods. The resulting glass ceramic is white or translucent in appearance with high strength achieved through heat treatment of the fusion-formed glass. | 08-28-2014 |
20140370066 | Antimicrobial Glass-Ceramics - The application discloses the formation of antimicrobial glass-ceramic articles having an amorphous phase and a crystalline phase and an antimicrobial agent selected from the group consisting of silver, copper and a mixture of silver and copper. The antimicrobial glass-ceramic can have a Log Reduction of >2. | 12-18-2014 |
20150044474 | FUSION FORMED AND ION EXCHANGED GLASS-CERAMICS - The present disclosure relates to fusion formable highly crystalline glass-ceramic articles whose composition lies within the SiO | 02-12-2015 |