摘要:
A porous ceramic honeycomb filter manufactured from an oxide-based ceramic material having a pore size distribution with d1≧7.0 microns. Preferably, the oxide-based material is cordierite or aluminum titanate. Alternatively, the filter contains a cordierite-containing ceramic body with a narrow pore size distribution with db≦1.00, wherein db=(d90−d10)/d50. Also disclosed is a batch mixture, method and honeycomb green body made from mixture of inorganic source materials selected from the group of magnesia sources, alumina sources, and silica sources, and a pore former having a narrow particle size distribution with dps≦0.90, wherein dps={(dp90−dp10)/dp50}. The pore former is preferably selected from a group consisting of canna starch, sago palm starch, green mung bean starch, and single-mode potato starch.
摘要:
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.
摘要:
Polymer membranes that include a crosslinked poly(vinyl alcohol-co-vinylamine), which membranes are non-porous or are porous with pores having a median pore size of 300 nm or less. Also disclosed are polymer membranes which include a crosslinked poly(vinyl alcohol-co-vinylamine) and which also include a second polyamine wherein the poly(vinyl alcohol-co-vinylamine) and the second polyamine are crosslinked with one another.
摘要:
Light diffusing optical fibers for use in ultraviolet illumination applications and which have a uniform color gradient that is angularly independent are disclosed herein along with methods for making such fibers. The light diffusing fibers are composed of a silica-based glass core that is coated with a number of layers including a scattering layer.
摘要:
Systems and methods for performing photoreactions in a photoreactive material using scattered actinic light from at least one light-diffusing optical fiber are disclosed. The systems and methods include disposing a light-diffusing optical fiber relative to the photoreactive material. The light-diffusing optical fiber has a glass core, a surrounding cladding, and nano-sized structures situated either within the glass core or at the core-cladding boundary. The nano-sized structures are configured to scatter guided actinic light that travels in the light-diffusing optical fiber from an actinic light source. The scattered actinic light is provided throughout the photoreactive material and causes a photoreaction throughout the photoreactive material.
摘要:
The disclosure relates to methods for coating ceramic catalyst supports with a base coating, said method comprising, in part, providing an aqueous mixture comprising at least one polyvinyl alcohol homopolymer and at least one blocked isocyanate crosslinker, and to ceramic catalyst supports having a base coating comprising at least one polyvinyl alcohol homopolymer and at least one blocked isocyanate crosslinker.
摘要:
A ceramic forming batch mixture including inorganic batch materials, such as sources of alumina, titania, and silica, a pore former combination including first and second pore formers with different compositions; an organic binder; and a solvent. Also disclosed is a method for producing a ceramic article involving mixing the inorganic batch materials with the pore former combination having first and second pore formers of different composition, adding an organic binder and a solvent, forming a green body; and firing the green body. A green body having a combination of first and second pore formers with different compositions is disclosed, as are several methods for firing to produce ceramic articles such as aluminum titanate.
摘要:
A porous ceramic honeycomb filter manufactured from an oxide-based ceramic material having a pore size distribution with d1≧7.0 microns. Preferably, the oxide-based material is cordierite or aluminum titanate. Alternatively, the filter contains a cordierite-containing ceramic body with a narrow pore size distribution with db≦1.00, wherein db=(d90−d10)/d50. Also disclosed is a batch mixture, method and honeycomb green body made from mixture of inorganic source materials selected from the group of magnesia sources, alumina sources, and silica sources, and a pore former having a narrow particle size distribution with dps≦0.90, wherein dps={(dp90−dp10)/dp50}. The pore former is preferably selected from a group consisting of canna starch, sago palm starch, green mung bean starch, and single-mode potato starch.
摘要:
Disclosed is a method of forming a structured sintered article including providing a mixture comprising a sinterable particulate material and a binder, the binder comprising, as a function of total resin content of the binder, at least 50% by weight of a thermoplastic binder material and at least 5% by weight of a radiation-curable binder material; shaping the mixture with a mold to form a structure; setting the structure by cooling the structure or by allowing the structure to cool; separating the structure from the mold; irradiating the structure so as to at least partially cure the radiation-curable binder material, and debinding and sintering the structure so as to form a structured sintered article. Shaping may include forming a structure having one or more open channels, and sintering may include sintering in together in contact with at least one additional structure so as to cover or enclose the channels.
摘要:
A method for base-coating a porous ceramic catalyst support includes coating the support with a passivation coating via vacuum infiltration, and subsequently exposing the support to a microwave field to dry the coating and form a polymerized film. The method further includes coating the support with a catalyst coating or washcoat, and subsequently exposing the support to a second microwave field, thereby removing water from the catalyst coating or washcoat.