Abstract:
A porous ceramic honeycomb article comprising a honeycomb body formed from cordierite ceramic, wherein the honeycomb body has a porosity P% ≥ 55% and a cell channel density CD ≥ 150 cpsi. The porous channel walls have a wall thickness T, wherein (11+(300-CD)*0.03) ≥ T ≥(8+(300-CD)*0.02), a median pore size ≤ 20 microns, and a pore size distribution with a d-factor of ≤ 0.35. The honeycomb body has a specific pore volume of VP ≤ 0.22. The porous ceramic honeycomb article exhibits a coated pressure drop increase of ≤ 8 kPa at a flow rate of 26.5 cubic feet per minute when coated with 100 g/L of a washcoat catalyst and loaded with 5 g/L of soot.
Abstract:
A system and method for channel state information feedback in wireless communications systems are provided. A method for reporting channel information includes determining, at a user equipment, a channel information type for first channel information to be reported to a communications controller (block 515), determining the first channel information conditioned on previously reported channel information and on the channel information type (block 535), and reporting the first channel information, the channel information type, or a combination thereof, to the communications controller (block 540).
Abstract:
A cell culture apparatus includes a substrate having formed therein a micro-well array, the micro-well array comprising a plurality of micro-wells. Each micro-well is defined by a curved surface which is concave. At least two of the micro-wells have different topgraphy.
Abstract:
Methods for preparing porous inorganic coatings on porous supports using certain pore fillers, and porous supports coated with porous inorganic coatings. The porous inorganic coatings may serve as membranes useful in, for example, liquid-liquid, liquid-particulate, gas-gas, or gas-particulate separation applications.
Abstract:
The present invention relates generally to mercaptofunctional high µß EO chromophores and EO polymers, and particularly to mercaptofunctional high µß EO chromophores and EO polymers useful for making electro-optical devices and systems. Mercaptofunctional high µß EO chromophores are covalently bonded to poly(imido sulfide) polymers producing high Tg, low optical loss, covalently bonded, high µß EO chromophore containing polymers. Methods of synthesizing these EO materials using mild polymerization conditions are also described.
Abstract:
A method for manufacturing a honeycomb structure comprises providing an aqueous ceramic solution, providing a batch cross-link agent, mixing the agent with the solution, extruding the aqueous ceramic solution containing the cross-link agent into a honeycomb structure, and drying the honeycomb structure via a single drying step thereby forming a hardened, substantially water resistant, honeycomb structure. The method may further comprise addition of a ceramic surfactant to the aqueous ceramic solution, as well as plugging channels within the honeycomb structure with a plugging material comprising an aqueous ceramic solution that includes batch cross-link agents and ceramic surfactants therein. Also disclosed is a green body honeycomb article having a green honeycomb matrix containing a first ceramic batch compound of inorganic constituents, a first batch cross-link agent, and an aqueous vehicle wherein the matrix includes interconnected walls forming open-ended channels and a plugging material located in at least one of the open-ended channels.
Abstract:
Cordierite ceramic articles with high volume percent porosities of at least 64% but less than 80% have controlled median pore sizes and mean coefficients of thermal expansion that impart substantially improved modulus of rupture strengths (MOR) and thermal shock resistance (TSR) to the ceramic articles.
Abstract:
Disclosed are ceramic articles, which in one aspect are composed predominately of a cordierite having a composition close to that of Mg 2 Al 4 Si 5 O 18 . The ceramic articles possess a microstructure characterized by a unique combination of relatively high porosity and relatively narrow pore size distribution, both as measured by mercury porosimetry, that render the ceramic structure useful for ceramic filter applications requiring high thermal durability and high filtration efficiency coupled with low pressure drop along the length of the filter. Such ceramic bodies are particularly well suited for filtration applications, such as diesel exhaust filters or DPFs. Also disclosed are methods for the manufacture of the ceramic articles described herein.
Abstract translation:公开了一种陶瓷制品,其一方面主要由堇青石组成,其组成接近于Mg 2 O 4 Si 5 O 5的组成 18 SUB>。 陶瓷制品具有微结构,其特征在于通过水银孔率测定法测量的相对高的孔隙率和相对窄的孔径分布的独特组合,使得陶瓷结构可用于需要高热耐久性和高过滤效率以及低的陶瓷过滤器应用 沿着过滤器长度的压降。 这种陶瓷体特别适用于过滤应用,例如柴油机排气过滤器或DPF。 还公开了用于制造本文所述的陶瓷制品的方法。
Abstract:
A porous ceramic honeycomb filter manufactured from an oxide-based ceramic material having a pore size distribution with d 1 > 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 d b 1.00, wherein d b = (d 90 - d 10 ) / d 50 . 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 d ps 0.90, wherein d ps = {(dp 90 -dp 10 )/dp 50 }. 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.
Abstract:
Porous ceramic honeycomb articles for use as particulate filters and processes for making the same are described herein. The porous ceramic honeycomb articles include a fired cordierite body. The fired cordierite body has a microcrack parameter (Nb3) of about 0.05 to about 0.25 prior to exposure to a microcracking condition. After exposure to the microcracking condition, the fired cordierite body has a microcrack parameter (Nb3) at least 20% greater than the microcrack parameter prior to exposure to the microcracking condition. The fired cordierite body has a coefficient of thermal expansion (CTE) of about 7.0×10−7/° C. to about 15.0×10−7/° C. over from about 25° C. to about 800° C. prior to exposure to the microcracking condition and a coefficient of thermal expansion of about 1.0×10−7/° C. to about 10.0×10−7/° C. over from about 25° C. to about 800° C. after exposure to the microcracking condition. The microcrack parameter may include a thermal cycle or a chemical treatment.