摘要:
Nanostructured non-stoichiometric materials are disclosed. Novel catalysts and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel catalysts for petrochemical, polymers, plastics, specialty chemicals, environmental and pharmaceutical applications.
摘要:
An activated substrate surface suitable for electronics and microsystems preparation is prepare by contacting the surface with a surface activation compound, e.g. organometallic based on palladium, platinum, rhodium or iridium. The photo labile ligand has an optical absorption band which overlaps with the wavelength of the UV. A UV lamp is used, in combination with a mask, to selectively irradiate the contacted surface. Irradiation of the surface with light of a suitable wavelength decomposes the organometallic compound to the activating metal. The surface is then ready for electroless plating with the desired conducting material. The mask is patterned to delineate areas where surface activation is not to occur. The organometallic compound absorbs ultraviolet radiation in the wavelength range 210-260 nm, or in the wavelength range 290-330 nm, in the solid state if the compound exists as a solid at 25° C. or in the liquid state if the compound exists as a liquid at 25° C.
摘要:
Nanostructured non-stoichiometric materials are disclosed. Novel biomedical materials and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for developing novel biomedical products.
摘要:
A method for preparing thin films of noble metals upon porous substrate surfaces including utilizing plasma polymerization wherein the noble metals are derived from a monomer or comonomer precursor of the noble metal and with the precursor being disposed within a plasma glow zone to convert the precursor to its dissociated form, thereby allowing the substrate to receive a deposit of a substantially continuous noble metal film thereon. A wide variety of noble metals and their alloys may be treated in this fashion, including such noble metals as platinum, ruthenium, gold and certain alloys thereof.
摘要:
Nanostructured non-stoichiometric materials and methods of reducing manufacturing and raw material costs through the use of nanostructured materials are provided. Specifically, use of non-stoichiometric materials of oxide, nitride, carbide, chalcogenides, borides, alloys and other compositions are taught.
摘要:
A composite emitter (100) for a thermophotovoltaic cell and other applications, and a method of forming the composite emitter. The composite emitter includes a substrate (102) and a selective emitter layer (104) composed of at least one substantially pure ceramic oxide selective emitter material applied to the substrate using a thermal spraying method. The substrate is preferably made of a durable material such as a silicon-based material or a refractory metal oxide. In one embodiment, the selective emitter layer may be composed of two or more selective emitter materials. In another embodiment, the composite emitter may further include a reflective metal layer (106). The method includes providing a substrate and plasma spraying one or more selective emitter materials onto the substrate to a thickness of between about 10 microns and about 400 microns to form the selective emitter layer. Preferably, the selective emitter layer has an in situ density of between 80% and 95% of the bulk density of the selective emitter material used.
摘要:
The process for making the high temperature-resistant ceramic material from the MgO—Al2O3 system includes burning a mixture containing a predetermined amount of magnesium oxide (MgO) of a predetermined grain size distribution in an amount range of from 30 to 99 parts by weight and a predetermined amount of magnesium aluminate (MgAl2O4) of another different predetermined grain size distribution in a range of from 1 to 70 parts by weight to obtain a ceramic product having a thermal expansion coefficient and selecting the amounts of magnesium oxide and magnesium aluminate as well as the predetermined grain size distributions so that the thermal expansion coefficient of the ceramic product is substantially equal to that of platinum and platinum alloys and in a range of from 9×10−6 K−1 to 15×10−6 K−1.
摘要翻译:从MgO-Al 2 O 3体系制造耐高温陶瓷材料的方法包括:将含有预定量的氧化镁(MgO)的混合物燃烧,其含量范围为30〜99重量份, 预定量的另外不同的预定晶粒尺寸分布的铝酸镁(MgAl 2 O 4)在1至70重量份的范围内,以获得具有热膨胀系数并选择氧化镁和铝酸镁的量的陶瓷产品以及 预定的晶粒尺寸分布使得陶瓷产品的热膨胀系数基本上等于铂和铂合金的热膨胀系数,并且在9×10 -6 K -1至15×10 -6 K -1的范围内。
摘要:
An after-treating apparatus of exhaust gas and a catalyst device installed therein is disclosed. The after-treating apparatus of exhaust gas primarily removes the exhaust gas in a first filtering device and a second filtering device, and secondarily purifies within the catalyst device. The first filtering device and the second filtering device are controlled by opening and closing a valve through a time control part. That is, when particulate of the exhaust gas is collected in the first filtering device, the second filtering device burns the collected particulate by means of an electric heater. Also, the catalyst device is prepared by wash-coating an active substrate on a honeycomb, the active substrate being produced by supporting platinum, nickel, and promoter on a supporter of alumina and chromic oxide.
摘要:
0564344368A metal-oxide layer exhibiting a photocatalytic activity function is formed on the surface of an inorganic architectural material, such as external wall material, roofing material, internal wall material, flooring material, and ceiling material, including glass, tile, concrete, stone, metal, and the like, so as to provide the property of deodorizing a space coming in contact with the architectural material, and antimold, antisoiling properties, and ultraviolet-ray absorbency of the surface of the architectural material, as well as the long-term maintenance of these properties. Preferably, the metal-oxide layer is formed by fixing a metal-oxide thin film on the surface of the architectural material. Alternatively, the metal-oxide layer is formed as an architectural material in which the surface thereof and its vicinity are mainly formed of a metal mixture including a metal oxide, such as titanium oxide, and palladium for improving photocatalytic activity, or a metal mixture including a metal constituting the metal oxide, such as titanium, and a composite of a second metal, while its inner portion is substantially formed of a metal mixture including titanium or a composite of titanium and palladium, the surface and its vicinity as well as the inner portion being formed continuously.
摘要:
Photochemical and electroless metallization techniques have been combined to create high resolution circuits with line widths and spaces of about one mil on alumina substrates. In this process, small amounts of a xylene-soluble platinum metallo-organic compound are first applied to the surface of the alumina substrate. A mask is then used to selectively expose the platinum metallo-organic compound to ultraviolet light in the areas that are to be metallized, so as to transform the platinum metallo-organic compound into a xylene-insoluble form. After a xylene rinse removes the original soluble platinum compound from the unexposed areas, the substrate is fired in air at about 450.degree. C. for about five minutes, so as to pyrolize the insoluble, irradiated platinum metallo-organic compound into catalytically active platinum. This is followed by electroless deposition of copper onto the ultraviolet-treated regions where the catalytically active platinum resides.