摘要:
A composition for producing a layer or a coating, especially a mold release layer, includes aluminum titanate and/or silicon nitride, an oxidic inorganic component and a binder comprising nanoscale particles.
摘要:
The invention relates to a method for producing ceramic hollow fibers from nanoscale particles and to hollow fibers produced in such a manner. The inventive method is characterized in that the ceramic material has a solids content of >25% by volume, preferably >30% by volume and is processed by means of extrusion and spinning. The hollow fiber is sintered according to conventional sintering methods. A hollow fiber produced in this manner is used for metal, polymer and ceramic matrix reinforcements, for artificial organs, for microsystems technology components, for fiber optical waveguides, for ceramic membranes, for solid electrolyte in fuel cells (SOFC), for tissue engineering and for producing extremely light ceramic parts, such as heat shields or brake systems, that are subjected to temperature stresses. The inventive ceramic batch can also be processed by means of silk screening whereby resulting in the production of filigree structures over the ceramic silk screening.
摘要:
A filtration appliance for wastewater purification, preferably for a sewage treatment plant, in particular for a small sewage treatment plant, including at least one ceramic-based membrane for separating off microorganisms, to a sewage treatment plant having such a filtration appliance, a method of purifying wastewater, in particular in a sewage treatment plant, wherein microorganisms present in the wastewater are separated off by means of at least one ceramic-based membrane, and also to the use of a ceramic-based membrane as filter for separating off microorganisms and, if appropriate, fine solids, from wastewaters.
摘要:
The invention relates to nanoscale rutile or oxide powder that is obtained by producing amorphous TiO2 by mixing an alcoholic solution with a titanium alcoholate and with an aluminum alcohalate and adding water and acid. The amorphous, aluminum-containing TiO2 is isolated by removing the solvent, and is redispersed in water in the presence of a tin salt. Thermal or hydrothermal post-processing yields rutile or oxide that can be redispersed to primary particle size. The n-rutile or the obtained oxide having a primary particle size ranging between 5 and 20 nm can be incorporated into all organic matrices so that they remain transparent. Photocatalytic activity is suppressed by lattice doping with trivalent ions. If the amorphous precursor is redispersed in alcohol, or not isolated, but immediately crystallized, an anatase is obtained that can be redispersed to primary particle size. A variation of the alcoholates allows production of the following components: ZrO2, ZnO, SnO2, ATO, In2O3, ITO, Y2O3, BaO, CaO, MgO, CeO2, and BaTiO.
摘要翻译:本发明涉及纳米级金红石或氧化物粉末,该纳米级金红石或氧化物粉末是通过将醇溶液与醇钛酸盐和铝铝酸盐混合并加入水和酸而制备无定形TiO 2获得的。 通过除去溶剂来分离无定形的含铝TiO 2,并在锡盐存在下再分散在水中。 热处理或水热后处理产生金红石或氧化物,可以再分散成初级粒度。 一次粒径为5〜20nm的正金红石或所得到的氧化物可以并入所有的有机基质中,使得它们保持透明。 通过三价离子的晶格掺杂抑制了光催化活性。 如果无定形前体再分散在醇中,或者不分离,但是立即结晶,则获得可以再分散成一次粒径的锐钛矿。 醇化物的变化可以生产下列成分:ZrO 2,ZnO,SnO 2,ATO,In 2 O 3,ITO,Y 2 O 3,BaO,CaO,MgO,CeO 2和BaTiO。
摘要:
A layer or coating which counteracts crystalline deposits on a substrate includes a matrix composed of a binder system and ceramic particles, and also boron nitride in particle form, wherein the boron nitride particles are incorporated into the matrix and are distributed essentially homogeneously therein.
摘要:
Nano-sized delivery systems consisting of an inorganic nano particle moiety covalently bonded to at least one organic pro-perfume or pro-drug moiety are disclosed. The systems of the invention are able to deliver perfuming or pharmaceutical active ingredients. Other aspects of the present invention include the use of such systems in perfumery as well as the perfuming compositions or perfumed articles that incorporate these delivery systems.
摘要:
The invention relates to a process for producing a composite material which has properties permitting it to be used as what is known as a “photonic crystal”. The process is a template-based process. Moreover, the invention relates to the composite materials produced by the process and to the use of these materials.
摘要:
The invention relates to nanoscale rutile or oxide powder that is obtained by producing amorphous TiO2 by mixing an alcoholic solution with a titanium alcoholate and with an aluminium alcohalate and adding water and acid. The amorphous, aluminum-containing TiO2 is isolated by removing the solvent, and is redispersed in water in the presence of a tin salt. Thermal or hydrothermal post-processing yields rutile or oxide that can be redispersed to primary particle size. The n-rutile or the obtained oxide having a primary particle size ranging between 5 and 20 nm can be incorporated into all organic matrices so that they remain transparent. Photocatalytic activity is suppressed by lattice doping with trivalent ions. If the amorphous precursor is redispersed in alcohol, or not isolated, but immediately crystallized, an anatase is obtained that can be redispersed to primary particle size. A variation of the alcoholates allows production of the following components: ZrO2, ZnO, SnO2, ATO, In2O3, ITO, Y2O3, BaO, CaO, MgO, CeO2, and BaTiO.
摘要翻译:本发明涉及纳米级金红石或氧化物粉末,该纳米级金红石或氧化物粉末是通过将醇溶液与醇钛酸盐和铝铝酸盐混合并加入水和酸而制备无定形TiO 2而获得的。 通过除去溶剂来分离无定形的含铝TiO 2,并在锡盐存在下再分散在水中。 热处理或水热后处理产生金红石或氧化物,可以再分散成初级粒度。 一次粒径为5〜20nm的正金红石或所得到的氧化物可以并入所有的有机基质中,使得它们保持透明。 通过三价离子的晶格掺杂抑制了光催化活性。 如果无定形前体再分散在醇中,或者不分离,但是立即结晶,则获得可以再分散成一次粒径的锐钛矿。 醇化物的变体允许产生以下组分:ZrO 2,ZnO,SnO 2,ATO,In 2 O 3 ITO,Y 2 O 3,BaO,CaO,MgO,CeO 2和BaTiO。
摘要:
The invention concerns a method for producing porous ceramic layers on metallic, ceramic, enameled or glass substrates using crystalline nanoparticles of particle sizes of between 3 nm and 100 nm via a wet-chemical process and functionalising of this porous ceramic layer through introducing a second component into the pores of the porous ceramic layer which serves as carrier layer.The porous ceramic layers can be filled with hydrophobizing, hydrophilizing, dirt-repellent and corrosion-inhibiting substances which remain in the substrate or are supplied later on demand, or with bactericidal substances, aromatics, perfumes or inhalation substances which are delivered to the room air in precise doses.
摘要:
This specification describes the use of a composition comprising a nanoscale powder, a porous ceramic powder and a solvent for protecting a metallic surface against chemical attacks at high temperatures, in particular in a reducing and/or carburizing atmosphere, and also a corresponding process. Furthermore, this specification describes a plant part having a metallic surface which, in the operating state, is exposed to a reducing and/or carburizing atmosphere, wherein the surface is coated with a porous protective coating having a specific surface area of at least 20 m2/g.