Patent application number | Description | Published |
20080242535 | Honeycomb Structural Body and Method of Fabricating the Same - A fibrous silicon carbide substrate is disclosed that is formed from a reaction between carbon fibers and silicon additives, to provide in-situ silicon carbide fibers. The fibrous structure is formed from a paper-making process of carbon or organic fibers that form a plurality of lamination members. The lamination members, each having a plurality of through holes, that when aligned in a lamination direction, form a honeycomb array of channels. The lamination members can be adapted into a wall-flow configuration for use in filtration of the exhaust of internal combustion engines. | 10-02-2008 |
20080283465 | LOW COEFFICIENT OF THERMAL EXPANSION BONDING SYSTEM FOR A HIGH POROSITY CERAMIC BODY AND METHODS OF MANUFACTURE - A porous ceramic body comprises a plurality of fibers and a bonding system bonding a portion of at least two fibers of the plurality of fibers. The plurality of fibers has a first coefficient of thermal expansion. The bonding system has a second coefficient of thermal expansion lower than the first coefficient of thermal expansion. In some embodiments, when the plurality of fibers and the bonding system are combined the resulting porous ceramic body has a third coefficient of thermal expansion which is at least about 10% less than the first coefficient of thermal expansion. | 11-20-2008 |
20080292842 | Carbon Fiber Substrate and Method for Forming the Same - A porous carbon fiber substrate and method of forming the same including providing a fiber material including carbon, providing at least one extrusion aid and providing at least one bonding phase material. The fiber material, the at least one extrusion aid and the at least one bonding phase material are mixed with a fluid. The mixed fiber material, at least one extrusion aid, at least one bonding phase material and fluid are extruded into a green honeycomb substrate. The green honeycomb substrate is fired, enabling bond formation and forming a porous carbon fiber honeycomb substrate. | 11-27-2008 |
20090000260 | Fibrous Cordierite Materials - A method of manufacturing a fibrous material includes mixing at least two cordierite precursor materials to form a mixture. One or more of the at least two cordierite precursor materials is in a form of a fiber and the mixture includes about 43% to about 51% by weight SiO | 01-01-2009 |
20090035511 | Fiber-Based Ceramic Substrate and Method of Fabricating the Same - Low cost aluminosilicate fibers are used to form a ceramic substrate material using inorganic binders that promote the formation of stable compounds that inhibit the formation of crystal silica, or cristobalite, when the substrate is used or exposed to high operating temperatures. The aluminosilicate fibers are mixed with additives including organic and inorganic binders and a fluid to form a plastic mixture. The plastic mixture is formed into a green substrate, and subsequently cured into the ceramic substrate. The fiber-based constituents permit the formation of rigid porous structures for filtration, insulation, and high temperature processes and chemical reactions. | 02-05-2009 |
20090068438 | Porous Washcoat-Bonded Fiber Substrate - A porous substrate and method of forming a porous substrate including providing a fiber material, providing at least one extrusion aid, and providing at least one washcoat precursor. The fiber material, the at least one extrusion aid and the at least one washcoat precursor are mixed to provide an extrudable batch. The extrudable batch is extruded into a green substrate. The green substrate is fired to form a porous rigid substrate and to form a washcoat at least partially coating the fiber material | 03-12-2009 |
20090092786 | Fibrous aluminum titanate substrates and methods of forming the same - A porous fibrous honeycomb substrate having an aluminum titanate composition and methods of producing the same are provided herein. Precursors of aluminum titanate are provided in an extrudable mixture that includes fiber materials to form a green honeycomb substrate. When cured, the precursors of aluminum titanate form an aluminum titanate composition, with the fiber materials defining the porous microstructure. Various composite structures including aluminum titanate are provided to form a porous honeycomb substrate that can be configured to be filtration media and/or a catalytic host. | 04-09-2009 |
20090166910 | System and Method for Twin Screw Extrusion of a Fibrous Porous Substrate - This invention provides a system and method for forming a fibrous porous ceramic substrate that employs a screw extruder, and illustratively, a twin screw extruder to form a substrate by directing a homogeneous, wetted and mixed group of substrate components through a screw extruder die under pressure. The components of the mixture can be initially mixed in a substantially dry state by an appropriate mixer to form a homogeneous powder with a high dispersal of materials therein. The powder can be continuously mixed and conveyed to a feeder of the extruder. Along the path of the extruder, fluid can be introduced at a metered rate, along with other additives, such as colloidal silica (glass binder). The extruder's twin, co-rotating shafts include a combination of screw elements for feeding the mixture and shear-inducing mixing elements (kneading blocks) for thoroughly mixing fluid into the dry components. The wetted components pass through alternating sets of transport screws and kneading blocks until the kneaded, wetted mixture finally enter a vacuum section of the extruder where a vacuum is applied to remove excess air pockets and/or bubbles from the mixture. The mixture is thereafter driven through the die head where it exits as a continuous, extruded shape. Such a shape can comprise a honeycomb useful in filtration applications. The extruder can include a cooling system. The fifer in the mixture can be mullite. Alternatively the mixture can form a silicon carbide or other type of porous substrate matrix. | 07-02-2009 |
20100048374 | System and Method for Fabricating Ceramic Substrates - This invention provides a system and method for establishing proper quantities of components in the initial mixture to be used in the fabrication of a porous ceramic substrate. The components typically consist of a solvent, a bulk fiber such as mullite, an organic binder for use in extrusion of the green substrate, a glass/clay bonding phase that bonds the fibers upon high-temperature curing and a pore former that defines gaps between the particles and is vaporized out of the substrate during curing. By identifying the controllable factors related to each of the components, and adjusting the factors to vary the resulting strength and porosity of the cured substrate, an optimized strength and porosity performance can be achieved. The controlling factors for each component include its relative weight percent in the mixture. The fiber component is also controlled via fiber diameter, diameter uniformity, and fiber length-to-diameter aspect ratio. Likewise, pore former is also controlled by particle size and shape and particle density. The bonding phase may also be controlled based upon its contribution to the viscosity at sintering temperature. | 02-25-2010 |
20100075845 | Method and Apparatus for an Extruded Ceramic Biosoluble Fiber Substrate - A porous ceramic substrate is disclosed that is fabricated from biosoluble ceramic fibers. Porosity and permeability of the substrate is provided by intertangled biosoluble fibers, that can be formed into a honeycomb form substrate through an extrusion process. The fibrous structure is formed from mixing biosoluble fibers with additives that include a bonding agent, and a fluid to provide an extrudable mixture. The structure is sintered at a temperature that exceeds the glass formation temperature of the bonding agent, but less than the maximum operational limits of the biosoluble fiber, to form a structure that has sufficient strength and porosity to provide for filtration and/or as a catalytic host. | 03-25-2010 |
20110082564 | Devices and Methods for Tissue Engineering - A tissue scaffold fabricated from bioinert fiber forms a rigid three-dimensional porous matrix having a bioinert composition. Porosity in the form of interconnected pore space is provided by the space between the bioinert fiber in the porous matrix. Strength of the porous matrix is provided by bioinert fiber fused and bonded into the rigid three-dimensional matrix having a specific pore size and pore size distribution. The tissue scaffold supports tissue in-growth to provide osteoconductivity as a tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 04-07-2011 |
20110106255 | Devices and Methods for Tissue Engineering - A resorbable tissue scaffold fabricated from bioactive glass fiber forms a rigid three-dimensional porous matrix having a bioactive composition. Porosity in the form of interconnected pore space is provided by the space between the bioactive glass fiber in the porous matrix. Strength of the bioresorbable matrix is provided by bioactive glass that fuses and bonds the bioactive glass fiber into the rigid three-dimensional matrix. The resorbable tissue scaffold supports tissue in-growth to provide osteoconductivity as a resorbable tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 05-05-2011 |
20110151181 | Fiber Enhanced Porous Substrate - A porous honeycomb substrate having about 10% to about 60% by volume ceramic fiber is fabricated in a variety of material compositions. The fiber material is combined with particle-based materials to reaction-form composite structures forming a porous matrix. The porous honeycomb substrate exhibits an open pore network of porosity from the fiber component to provide high permeability for various applications such as filtration and catalytic hosting of chemical processes. | 06-23-2011 |
20110204537 | Devices and Methods for Tissue Engineering - A tissue scaffold fabricated from bioinert fiber forms a rigid three-dimensional porous matrix having a bioinert composition. Porosity in the form of interconnected pore space is provided by the space between the bioinert fiber in the porous matrix. Strength of the porous matrix is provided by bioinert fiber fused and bonded into the rigid three-dimensional matrix having a specific pore size and pore size distribution. The tissue scaffold supports tissue in-growth to provide osteoconductivity as a tissue scaffold used for the repair of damaged and/or diseased bone tissue. | 08-25-2011 |
20120158139 | Method and Apparatus for a Porous Orthopedic Implant - An orthopedic implant having a pyrolytic carbon composition is provided with a porous coating. The porous coating is bonded to the pyrolytic carbon implant using a bond coat that is reaction-bonded to the carbon material. The porous coating can be reaction-bonded to the bond coat to provide a porous structure having a structure that is conducive to the ingrowth of living tissue when implanted in the body. | 06-21-2012 |
20120179271 | Devices and Methods for Tissue Engineering - A tissue engineering scaffold of interconnected and bonded fiber having a property with a value that is spatially distributed in at least two regions is provided. The scaffold has at least two regions with properties, such as porosity, strength, elastic modulus, osteoconductivity, and bioactivity that can be controlled and modified through fabrication processes that alter the pore size, pore size distribution, composition, and bonding of fiber and other additives. The value of the property can be provided with a gradient between each of the adjacent spatially distributed regions. | 07-12-2012 |
20120203355 | Devices and Methods for Tissue Engineering - A resorbable tissue scaffold fabricated from bioactive glass fiber forms a rigid three-dimensional porous matrix having a bioactive composition. Porosity in the form of interconnected pore space is provided by the space between the bioactive glass fiber in the porous matrix. Strength of the bioresorbable matrix is provided by bioactive glass that fuses and bonds the bioactive glass fiber into the rigid three-dimensional matrix. The resorbable tissue scaffold supports tissue in-growth to provide osteoconductivity as a resorbable tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 08-09-2012 |
20120219635 | Devices and Methods for Tissue Engineering - A bioactive tissue scaffold is fabricated from glass fiber that forms a rigid three-dimensional porous matrix having a bioactive composition. Porosity in the form of interconnected pore space is provided by the pore space between the glass fiber in the porous matrix. Mechanical properties such as strength, elastic modulus, and pore size distribution is provided by the three-dimensional matrix that is formed by bonded overlapping and intertangled fibers. The bioactive tissue scaffold can be formed from raw materials that are not bioactive, but rather precursors to bioactive materials. The bioactive tissue scaffold supports tissue in-growth to provide osteoconductivity as a resorbable tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 08-30-2012 |
20120239162 | Devices and Methods for Tissue Engineering - A tissue scaffold fabricated from tantalum fiber forms a rigid three-dimensional porous matrix having a tantalum composition. Porosity in the form of interconnected pore space is provided by the space between the tantalum fiber in the porous matrix. Strength of the porous matrix is provided by tantalum fiber fused and bonded into the rigid three-dimensional matrix having a specific pore size and pore size distribution. The tissue scaffold supports tissue in-growth to provide osteoconductivity as a tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 09-20-2012 |
20130066427 | Devices and Methods for Tissue Engineering - A silicon nitride porous tissue engineering scaffold is fabricated from a silicon-based fiber that is converted to silicon nitride through a reaction at elevated temperatures in a nitrogen environment. Porosity in the form of interconnected pore space is provided by the pore space between the fiber material in a porous matrix. The silicon nitride porous tissue engineering scaffold can be formed from raw materials that are a precursor to silicon nitride. The silicon nitride porous tissue engineering scaffold supports tissue in-growth to provide osteoconductivity as a biocompatible tissue scaffold used as an implantable medical device for the repair of damaged and/or diseased bone tissue. | 03-14-2013 |
20130173001 | Devices and Methods for Tissue Engineering - A resorbable tissue scaffold fabricated from bioactive glass fiber forms a rigid three-dimensional porous matrix having a bioactive composition. Porosity in the form of interconnected pore space is provided by the space between the bioactive glass fiber in the porous matrix. Strength of the bioresorbable matrix is provided by bioactive glass that fuses and bonds the bioactive glass fiber into the rigid three-dimensional matrix. The resorbable tissue scaffold supports tissue in-growth to provide osteoconductivity as a resorbable tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 07-04-2013 |
20130228947 | Devices and Method for Tissue Engineering - A method of fabricating a bioactive porous tissue scaffold is herein provided. Bioactive materials having a composition of biologically active materials that define a group of surface reactive glass, glass-ceramic, and ceramic materials that most commonly include a range of silicate, borate, and phosphate-based glass systems. These materials typically exhibit a narrow working range that require heating methods that use pore former combustion to control thermal variations during processing. | 09-05-2013 |
20140050765 | Devices and Methods for Tissue Engineering - A resorbable tissue scaffold in a glass ceramic composition forms a rigid three-dimensional porous matrix having a bioactive composition. Porosity in the form of interconnected pore space is provided by the space between the glass-ceramic fiber forming the porous matrix. Strength of the porous matrix is provided by the interconnected and bonded fiber that fuses into the rigid three-dimensional matrix. The resorbable tissue scaffold supports tissue ingrowth when implanted as a device for the repair of damaged and/or diseased bone tissue. | 02-20-2014 |
20140175693 | Method of Fabricating a Porous Orthopedic Implant - A tissue scaffold fabricated from bioinert fiber forms a rigid three-dimensional porous matrix having a bioinert composition. Porosity in the form of interconnected pore space is provided by the space between the bioinert fiber in the porous matrix. Strength of the porous matrix is provided by bioinert fiber fused and bonded into the rigid three-dimensional matrix having a specific pore size and pore size distribution. The tissue scaffold supports tissue in-growth to provide osteoconductivity as a tissue scaffold, used for the repair of damaged and/or diseased bone tissue. | 06-26-2014 |
20150073556 | Resorbable Interbody Device - A spinal interbody device fabricated of fully resorbable bioactive glass materials is used to maintain the intervertebral spacing in a fusion of adjacent vertebrae. The spinal interbody device can include regions of porous material having various levels of bioactivity so that fusion through ingrowth of bone tissue can be provided while regions of the spinal interbody device can continue to maintain the intervertebral space. | 03-12-2015 |