Abstract:
Das Verfahren zur Herstellung eines Filterelements enthält die folgenden Schritte: Sl) Aufbringen einer Membranschicht (1) auf ein Trägersubstrat (2), S2) Ätzen einer Membrankammer (3) auf der der Membranschicht (1) gegenüberliegenden Seite des Trägersubstrats (2) , so dass noch eine Restschicht (5) des Trägersubstrats (2) verbleibt, S3) Erzeugen von Poren (6) in der Membranschicht (1) zur Schaffung einer perforierten Membran, S4) Entfernen der Restschicht (5) durch Ätzen zum Freilegen der Membranschicht (1), S5) wobei die Membranschicht (1) während Schritt S1 oder in einem späteren Schritt einer zusätzlichen Behandlung zur Erhöhung der mechanischen Festigkeit ausgesetzt wird, um ihr eine Kristallstruktur mit einer gegenüber dem Grundmaterial der Membranschicht (1) erhöhten mechanischen Festigkeit und/oder eine verdichtete Struktur zu geben und vorzugsweise eine innere mechanische Vorspannung in ihr zu erzeugen.
Abstract:
A method for making foam structures suitable for use as mechanical energy absorbers, structural members, filters, catalyst carriers or the like. A composite rod (114) comprising an outer shell and an inner core is formed of respective mixtures of powders. The mixture for the outer shell comprises a sinterable powdered structural material (101) such as ceramics, metals, intermetallics, and a powdered binder (102) such as paraffin, wax or polymer. The inner core comprises a powdered channel-forming filler material (108) such as melamine or polymers, or soluble inorganic compounds or a metal that can differentially be removed from the structural material of the shell. The composite rod (114) may be formed by extrusion. The composite rod (114) is sectioned into a plurality of composite rod segments of predetermined length and a plurality of these segments is assembled in randomly oriented relationship to one another. The assemblage of rod segments is then consolidated, and the binder and filler are then removed, as by heating. The remaining structure of the outer shells, comprised of ceramic or metal, as the case may be, is then sintered to produce the foam structure. In certain embodiments, the material of the inner core may be removed by heating it in the course of heating the structure to perform the sintering step. In other embodiments, the binder and/or filler material may be removed by means of a suitable solvent.
Abstract:
A method of surely manufacturing a porous sound absorbing material having low weight and excellent heat resistance enough to be used for the exhaust nozzle of a jet engine, high sound absorbing effect on the noise in wide band from the jet engine, and stable performance without a variation in porosity, comprising the step of forming a frame of the aggregate (5) having pores (6).
Abstract:
A method of making carbon foam is described which involves pyrolizing a mixture containing at least one pyrolizable substance and at least one unpyrolizable material and then removing the unpyrolizable material to obtain the carbon foam. Carbon foam made by this process is also described. Incorporating the carbon foam in a variety of end use applications including electrodes, thermal insulation material, polymers, and the like is also described.
Abstract:
A method for preparing transparent mesostructured inorganic/block-copolymer composites or inorganic porous solids containing optically responsive species with selective optical, optoelectronic, and sensing properties resulting therefrom. Mesoscopically organized inorganic/block copolymer composites doped with dyes or complexes are prepared for use as optical hosts, chemical/physical/biological sensors, photochromic materials, optical waveguides, tunable solid-state lasers, or optoelectronic devices. The materials can be processed into a variety of different shapes, such as films, fibers, monoliths, for novel optical and sensing applications.
Abstract:
A method for degreasing a formed product from a powder, characterized in that it comprises immersing a formed product from a ceramic powder or a metal powder containing a binder comprising two or more components in an extracting liquid comprising an aqueous solution of a surfactant, thereby extracting selectively at least one component from the formed product to remove it, and then removing the residual components of the binder from the formed product. The method allows a speedy degreasing treatment in a short time with the suppression of occurrence of defects such as cracks, and can be practiced with high safety to a human body and the environment and further using inexpensive facilities.
Abstract:
A material is composed of a three-dimensional skeleton made of mutually linked bearing beamlet-like structures that enclose predeterminably dimensioned cavities. The material is produced by forming the skeleton around moulded bodies that occupy the space where the cavities will be located, then by removing the moulded bodies. This material can be used for example as an implant or as a filter.
Abstract:
A presente invenção trata-se de um processo de obtenção de pastilhas formadas por nanopartículas de biomateriais cerâmicos, com controle de volume e tamanho dos poros interconectados. As pastilhas apresentam porosidade adequada para a adesão e para o espalhamento celular, facilitando a neoformação óssea, com aplicação direcionada para o preenchimento de defeitos ósseos causados por doenças ou acidentes.