157 results about "Silicon" patented technology

The invention provides a method for preparing chabazite and a chabazite film in the absence of a template agent. Pure chabazite is formed through induction of out-of-phase crystal nucleus T-shaped zeolite under the condition of not adding an organic template agent. The chabazite molecular sieve film is formed through induction by loading formed chabazite on the outer surface of a porous support as a crystal seed. The method is characterized in that: silicon powder and sodium metaaluminate are used as a silicon source and an aluminum source; based on the molar ratio of oxides, the ratios of components which are prepared into sol are that: the molar ratio of SiO2 to Al2O3 is equal to 15-30, the molar ratio of OH<-> to SiO2 is equal to 0.9-1.5, the molar ratio of Na<+> to K<+> is equal to 0.1-1, and the molar ratio of H2O to SiO2 is equal to 18-40; the sol for coating the crystal seed is subjected to hydrothermal synthesis at the temperature of 100-160 DEG C for 16-72 hours; and a compact chabazite film is synthesized on a porous carrier. Through the method for preparing the chabazite and the chabazite film, the expensive organic template agent is prevented from being added, the synthesis process is simple, and the repeatability is high. The synthesized film shows better stability in an inspection acid medium and can be widely applied to a pervaporation separation process and a pervaporation film reactor of an acidic system.

The invention discloses a silver nano lattice surface enhanced raman active substrate and a preparation method thereof. According to the substrate, silicon single crystal is used as an underlay; a silver nanoparticle array structure is deposited on the silicon surface; the particle size of the silver nanoparticles is 30-90 nm; and the center distance of the particles is 99-111 nm. The silver nano lattice surface enhanced raman active substrate provided by the invention has a uniform shape and a controllable structure, and has an obvious surface raman enhancement effect on analytes of different concentrations, and an enhancement signal is uniform and stable. According to the method, the structural parameters and the shape of a silver nano lattice can be adjusted according to structural parameters of an ultra-thin aluminum oxide template, so that different influences of different metal nano lattice substrates on a raman surface enhancement effect are realized. The substrate and the method have the advantages of easiness for operation, low cost and easiness for industrial production.

The invention relates to a multistage porous ZSM-5 molecular sieve. The molecular sieve comprises the following raw materials: a silicon source, an aluminum source, a template agent, water, an alkalisource, polyether polyol, a seed crystal, a cosolvent and a mineralizer. The invention provides a preparation method of the multistage porous ZSM-5 molecular sieve with a high silicon-aluminum ratio.The synthesis process is simple, and cheap template agent and porous agent are adopted, so that the economic cost of the molecular sieve is reduced. The ZSM-5 molecular sieve obtained by the method has a multistage pore channel structure, the relative crystallinity is higher than 90%, and the specific surface area is greater than 420m<2> / g.

The invention discloses small pore diameter silicone rubber sponge and a preparation method thereof and relates to the field of processing of high polymer materials. The small pore diameter silicone rubber sponge comprises the following components in parts by weight: a component A: 100 parts of liquid organic silicone rubber; a component B: 3-8 parts of hydrogen-containing silicone oil; a component C: 0.5-10 parts of an emulsifier; a component D: 2-4 parts of a catalyst; a component E: 1-2 parts of an inhibitor; and a component F: 0-35 parts of a silicon resin. An emulsion dispersion mode is adopted, the dispersion phase size is small, and the silicone rubber sponge prepared by the method has the characteristics of bubble dispersion uniformity, small pore diameter and controllable density; and moreover, water serves as a foaming agent, and the sponge has the advantage of environment friendliness. The silicone rubber sponge material prepared by the method can serve as shock absorption, insulating, sound insulation and heat insulation materials.

Provided is a method of fabricating, with satisfactory adhesion, a thin film of a metal or a metallic-compound, such as a metal oxide or nitride, on a substrate made of a high-melting-point material such as silicon or ceramics by using a metal or metallic-compound target as the primary raw material so as to eliminate the necessity of using harmful gases such as organometallic gas, and by using an atmospheric-pressure plasma generated under atmospheric pressure as a reaction field and also as a heat source. Additionally provided is an apparatus for fabricating the thin film. The thin-film fabrication method by microplasma processing includes the steps of disposing a raw material for thin-film fabrication in one or more tubes (A) having a uniform inner diameter throughout, introducing an inert gas and applying a high-frequency voltage to the narrow tubes (A) to generate high-frequency plasma in the narrow tubes (A), heating / evaporating the raw material while maintaining the flow rate of the plasma gas in the narrow tubes (A) and maintaining the plasma gas temperature high, ejecting the evaporated material from the narrow tubes (A) to spray it onto the substrate, heating the substrate with the plasma, and depositing the sprayed material on the substrate under atmospheric pressure.

The invention discloses a synthetic method for a phosphorus-containing ZSM-5 molecular sieve. The method comprises the following steps: mixing a first organic template with an aluminum source, wherein in the obtained mixture, a mol ratio of the first organic template to Al2O3 in the aluminum source is 0.2-40: 1; treating the mixture in an enclosed reaction vessel at a temperature of 50 to 190 DEG C for 0.1 to 5 h and then carrying out cooling so as to obtain an intermediate product; and uniformly mixing the intermediate product with a second organic template, a silicon source and water and carrying out hydrothermal crystallization so as to obtain the phosphorus-containing ZSM-5 molecular sieve; wherein the aluminum source is an aluminum phosphate molecular sieve and / or silicon-phosphorus-aluminum molecular sieve. The method adopts a synthetic process route different from that in the prior art, abandons usage of high-cost silica-alumina gel as the silicon source and the aluminum source and can directly prepare the phosphorus-containing ZSM-5 molecular sieve, so synthesis cost is reduced.

The invention provides a ferrierite molecular sieve, a preparation method thereof and an application. The preparation method includes the steps: mixing silicon sources, alkalinity conditioning agents, aluminum sources, template agents and water to form uniform sol; controlling the molar ratio of SiO2, Al2O3, R, Na2O to H2O to be 1.0:(0.005-0.10):(0.05-1.2):(0.03-0.50):(5.0-100.0), and enabling a pH (potential of hydrogen) value to be lower than 12.8; performing pre-crystallization, crystallization, drying and calcination to obtain molecular sieve raw powder; performing acid treatment on the obtained molecular sieve raw powder; mixing the molecular sieve raw powder, the template agents and the water or further mixing the molecular sieve raw powder, the template agents, the water and the silicon sources to form water solution; performing water-heat treatment, drying and calcination to obtain the ferrierite molecular sieve. R is the template agents. The prepared ferrierite molecular sieve is high in relative crystallinity and silica alumina ratio, large in specific surface area and crystal particle and adjustable in acidity and has excellent selectivity and stability when being applied to linear-chain olefin skeletal isomerization reaction.

The invention discloses ferroferric oxide magnetic nanometer particles decorated with tetraazacalix [2] arene [2] triazine. A preparation method of the ferroferric oxide magnetic nanometer particles comprises the following steps of: firstly, covering a silicon shell by using the ferroferric oxide magnetic nanometer particles; decorating with amino to obtain amino-modified ferroferric oxide magnetic nanometer particles; and reacting the ferroferric oxide magnetic nanometer particles with the tetraazacalix [2] arene [2] triazine at 110 DEG C under a nitrogen condition to prepare the ferroferric oxide magnetic nanometer particles decorated with tetraazacalix [2] arene [2] triazine. The ferroferric oxide magnetic nanometer particles integrate the advantages of large superficial area of the original and easiness of separation of the original ferroferric oxide magnetic nanometer particles, and also have a new function characteristic, so that the extraction selectivity of a characteristic target is enhanced; and the ferroferric oxide magnetic nanometer particles are used for extracting and separating, and have the advantages of easiness and convenience in operation, and capability of extracting, enriching and separating organic matters and inorganic cations. And moreover, the ferroferric oxide magnetic nanometer particles can be totally separated from a base solution under an external magnetic field function, so that the ferroferric oxide magnetic nanometer particles are economic, environment-friendly and high in recovery rate and have a good popularization and application prospect.