摘要:
An object of the present invention is to provide: a honeycomb structured body in which honeycomb fired bodies are not displaced or coming off, whereby no exhaust gas leakage occurs; and a method for manufacturing such a honeycomb structured body. A honeycomb structured body comprising a ceramic block formed by combining a plurality of honeycomb fired bodies having a large number of cells separated by cell walls and longitudinally extending in parallel together by interposing an adhesive layer, wherein the honeycomb fired bodies adjacent to each other by interposing the adhesive layer each have at least one projected portion on the opposing side faces, and the projected portions formed on the honeycomb fired bodies overlap each other when seen from an end face of the honeycomb structured body and the projected portions formed on the adjacent honeycomb fired bodies abut each other.
摘要:
The freeze casting process for preparing a green shaped article such as a biocompatible bioceramic prosthesis or implant, comprises: a) providing a substrate at an initial predetermined spacing from one or more liquid dispensing outlets; b) writing a predetermined amount of a liquid formulation from at least one of the outlets onto the substrate, the formulation comprising: 8 to 99.99% by weight of a liquid sol comprising a liquid carrier and from 5 to 50% by weight, based on the weight of the carrier, of colloidally dispersed nanoparticles having a mean particle size in the range 0.25 to 100 nm; 92 to 0% by weight of a mineral powder having a mean particle size greater than 0.1 micron, and 0.01 to 10% by weight of at least one surfactant, freezing point depressant and/or rheology modifier; c) cooling the liquid formulation on the substrate so as to at least partially freeze the carrier on the cooled substrate; d) increasing the spacing between the one or more dispensing outlets and substrate to a further predetermined spacing; e) writing a further predetermined amount of the liquid formulation from at least one of the outlets either on to the substrate or on to deposit formed in steps b) and c) f) cooling the liquid formulation so as to at least partially freeze the liquid carrier on the substrate and/or on the deposit; and g) optionally repeating steps (d), (e) and (f) one or more times.
摘要:
Laminates are prepared from resin-impregnated flexible graphite sheets. Impregnated sheets are calendered and layers of the calendered sheets, which may also be coated with a resin adhesive, are stacked into structures which optionally contains layers of metals or plastics. After curing at elevated temperature and pressure, 2500 psi and 150°C, the laminates form dense machinable structures suitable for uses such as electronic thermal management (ETM) devices.
摘要:
The invention relates to the use of homopolymers or copolymers of (meth)acrylic acid or copolymers of C3-C40 monoolefins with ethylenically unsaturated C4-C6 dicarboxylic acid anhydrides as additives in ceramic materials, especially in clay, in order to produce ceramic construction materials, such as bricks and roofing tiles as well as ceramic materials containing said additives.
摘要:
Provided is a process for producing a multilayered ceramic substrate, with which a ceramic substrate having a step portion of a desired shape can be efficiently produced without requiring complicated producing process steps and equipments, as well as a multilayered ceramic substrate having high form precision produced by the process. An auxiliary-layer-lined unfired ceramic body 11, which is provided in a principal surface thereof with a step portion 15, has an unfired ceramic body 10 and an auxiliary layer 20 which is adhered to one principal surface of the unfired ceramic body 10 and which is made of a material substantially unsinterable at a temperature at which the unfired ceramic body 10 is fired. The auxiliary-layer-lined unfired ceramic body is fired at a temperature at which the unfired ceramic body is sinterable but the auxiliary layer is substantially unsinterable, while the auxiliary layer remains adhered to the unfired ceramic body. Pressing operation is performed by using a die 30 having a projection 22 placed on the side of the auxiliary-layer-lined unfired ceramic body retaining the auxiliary layer, so that the step portion (recess) 15(15a), having a shape corresponding to the outer shape of the die projection 22, is formed in the side of the auxiliary-layer-lined unfired ceramic body retaining the auxiliary layer.
摘要:
Process for the inclusion of heat liable pigments in an inert matrix comprising the steps of heterocoagulation and drying. The pigments obtained by this method and their use as colorants for ceramic materials area also claimed.
摘要:
Methods for producing substantially round, spherical and sintered particles from a slurry of a calcined, uncalcined or partially calcined raw material having an alumina content of more than 55% by weight, and a mullite growth promoter in an amount of from about 2 to about 10% dry weight of the total solids in the slurry. Methods for using such substantially round, spherical and sintered particles in hydraulic fracturing operations.
摘要:
This invention provides an electrolyte sheet for solid oxide fuel cells, characterized in : being formed by a doctor blade method or an extrusion molding method; being a scandia partially stabilized zirconia sheet, wherein 4 mol % to 6 mol % scandia is doped in a solid zirconia; a crystal structure thereof has a polycrystalline structure having a main body of tetragonal and including monoclinic phase, wherein a ratio of monoclinic phase (M), calculated by below described formula (1) from a diffraction peak intensity using X-ray diffraction, is 1 % to 80 %; and a Weibull modulus (m) thereof is not less than 10: a ratio of monoclinic phase (M: %) = [{monoclinic (1, 1, 1) + monoclinic (-1, 1, 1)}/{tetragonal and cubic (1, 1, 1) + monoclinic (1, 1, 1) + monoclinic (-1, 1, 1)}] x 100 ····· (1).
摘要:
There is provided a production process of a sheet-like dense cordierite sintered body which hardly generates cracks when dried and sintered, and has excellent formability. A production process of a sheet-like dense cordierite sintered body which has a step of forming a raw material containing cordierite powders having an average particle size of greater than 2 µm but not greater than 4 µm into a cordierite green sheet; and sintering the cordierite green sheet at from 1350 to 1450°C.