摘要:
A membrane microstructure device (10) is disclosed. The membrane microstructure device (10) includes a first glass, ceramic or glass-ceramic plate (12) defining a first recess (16), a second glass, ceramic or glass-ceramic plate (20) defining a second recess (24), and a non-metallic porous membrane (30) sandwiched between the first and second plates (12,20). The first plate (12), second plate (20) and porous membrane (30) are joined together and the porous membrane (30) is arranged to cover the first and second recesses (16,24) to define a first microchannel between the first plate and the porous membrane and a second microchannel in fluid communication with the first microchannel between the second plate and the porous membrane. A method of manufacturing a membrane microstructure device is also disclosed.
摘要:
An article with a body having spaced channels created at a surface of the body and extending into the body, wherein the channels are located at controlled spaced locations. The channeled or microchanneled articles may be in the form of channeled or microchanneled membranes or otherwise. Methods of manufacturing channeled articles and uses of the channeled articles are described.
摘要:
The invention concerns a separation element comprising a rigid porous single-piece support member (2) having, at its periphery, a continuous perimeter wall (2i) between, on one side of the porous support member, an inlet (4) for the fluid medium to be treated and, on another side of the porous support member, an outlet (5) for the retentate, and, internally, at least one surface covered by at least one separator layer (6) and defining an open structure formed by empty spaces (3) for circulating the fluid medium to be treated. According to the invention, the empty spaces (3) for the passage of the fluid medium to be treated, which are delimited by the surface of the support member covered with the separator layer (6), are arranged in the porous support member such that they provide, within said member, at least a first circulation matrix for the fluid medium to be treated (RI), comprising at least two interconnected circuits (Rli, Rl2) for the circulation of the fluid medium between the inlet (4) and the outlet (5) the porous support member.
摘要:
The invention relates to a catalytic activation layer for use in oxygen-permeable membranes, which can comprise at least one porous structure formed by interconnected ceramic oxide particles that conduct oxygen ions and electronic carriers, where the surface of said particles that is exposed to the pores is covered with nanoparticles made from a catalyst, the composition of which corresponds to the following formula: A 1-x-y B x C y O R where: A can be selected from Ti, Zr, Hf, lanthanide metals and combinations thereof; B and C are metals selected from Al, Ga, Y, Se, B, Nb, Ta, V, Mo, W, Re, Mn, Sn, Pr, Sm, Tb, Yb, Lu and combinations of same; and A must always be different from B. 0.01
摘要:
The present invention provides a method for producing a ceramic device in a low p O 2 atmosphere, comprising the steps of: - providing a composition comprising a base material and a transition metal; wherein the base material for the first layer is selected from the group consisting of zirconate, cerate, titanate, lanthanate, aluminate, doped zirconia and/or doped ceria, wherein the dopants are selected from the group of Ca, Ga, Sc, Y, and lanthanide elements; - forming a first layer of said composition, wherein said first layer is an electrolyte layer; - forming at least one electrode layer or electrode precursor layer on one side or both sides of said first layer; and - sintering the multilayer structure in a low p 0 2 atmosphere; characterized in that: the amount of the transition metal is from 0.01 to 4 mol%, based on the composition of the first layer; the oxygen partial pressure p02 is 10"14 Pa or less; and the sintering temperature is in the range of from 700 to 1600°C.
摘要:
A porous silicon nitride article (5) which is prepared by nitriding a formed article containing metallic silicon (3) as a primary component, characterized in that the silicon nitride article has a porous structure having an average pore diameter of 3 µm or more, has a total content of silicon and nitrogen of 95 % or more and has a degree of nitrization of silicon of 90 % or more. The porous silicon nitride article has a porous structure having a large average pore diameter and a specimen from the article exhibits a high thermal conductivity and a low thermal expansion coefficient, and thus the article can be suitably used for parts of a gas and/or solution clarification device such as a ceramic filter.
摘要:
Filter or filter-element designated for Modified Electro-Dialysis (MED) purposes characterized in that the filter or filter-element comprises a porous, ceramic, mainly uniform material with functional, preferably ion selective groups grafted onto the inner, porous surface of the ceramic body. The outer surface of the filter or filter-element may be completely or partly covered by layers of porous, ceramic membranes with a pore size of less than 1 νm and thickness less than 1 mm, and/or anion, cation or bipolar groups or membranes. The thickness of the filter-element is larger than 1 mm and has pores of size larger than 1 νm. The invention also relates to a method for the manufactureof such a filter either continuously by tape-casting, extruding, rolling or calendering or single-bodied by casting, pressing or forging, of a paste containing a non-conductive, ceramic material. The body is then sintered and finally grafted with functional, preferably ion selective groups for one or more specific ions or groups of ions, onto the inner, porous surface of the ceramic body. Use of the filter or filter-element for filtering ions or complexes of heavy or precious metals from water is also claimed.
摘要:
A porous silicon nitride article which is prepared by nitriding a formed article containing metallic silicon as a primary component and subjecting the nitrided article to a heating treatment at a temperature higher than that for the above nitriding reaction, characterized in that the silicon nitride article has a porous structure having an average pore diameter of 3 m or more and comprises at least one element selected from the group consisting of the Group 2A, the Group 3A, the Group 3B including lanthanoids and the Group 4B. The porous silicon nitride article has a porous structure having a large average pore diameter and a specimen from the article exhibits a high thermal conductivity and a low thermal expansion coefficient, and thus the article can be suitably used for parts of a gas and/or solution clarification device such as a ceramic filter.