54 results about "Nano crystallites" patented technology

A single source precursor for depositing ternary I-III-VI₂ chalcopyrite materials useful as semiconductors. The single source precursor has the I-III-VI₂ stoichiometry “built into” a single precursor molecular structure which degrades on heating or pyrolysis to yield the desired I-III-VI₂ ternary chalcopyrite. The single source precursors effectively degrade to yield the ternary chalcopyrite at low temperature, e.g. below 500° C., and are useful to deposit thin film ternary chalcopyrite layers via a spray CVD technique. The ternary single source precursors according to the invention can be used to provide nanocrystallite structures useful as quantum dots. A method of making the ternary single source precursors is also provided.

The invention extends the connotation range required to be protected on the basis of a previously issued patent ZL200710025045.4, i.e., a nanometer microcrystalline composite filter material and a preparation method thereof, belonging to the field of a water disposal technique material. According to weight percentage, the nanometer microcrystalline composite filter material comprises 3-95 percent of attapulgite clay, 5-80 percent of sepiolite clay, 2-25 percent of kaolinite clay, 2-97 percent of tubular halloysite, 5-75 percent of diatomite, 5-75 percent of natural zeolite (clinoptilolite, mordenite and the like), 0-25 percent of pillared montmorillonite, 0-50 percent of expanded vermiculite, 0-5 percent of expanded perlite and 0-50 percent of active carbon or bamboo carbon powders. All raw materials which are powder shapes are mixed according to proportion and stirred to granulate by adding an inorganic adhesive, then sintered and activated at the temperature of 900-500 DEG C (inert gas is required for sintering and activating the filter material added with active carbon). The nanometer microcrystalline composite filter material has smooth shape, rough surface and uniform particle size, with the diameter of 1-10mm, and is used for biological filter tanks and high-class adsorption filter materials in deep purification systems of drinking water and reclaimed water sewage disposal systems.

The invention belongs to the technical field of zeolite materials, in particular to a method for synthesizing ZSM-5 zeolite orderly accumulated by nanometer crystallite. The method comprises the following steps: adding MFI type zeolite seed crystal in a common ZSM-5 zeolite synthesizing solution; and synthesizing the ZSM-5 zeolite with multistage pore canals and controllable granular size by modulating the synthesizing ration, reaction condition or adding additives. In the invention, the ZSM-5 zeolite is an assembly body of a class of single crystals, which is grown by orderly packing seed crystals by ZSM-5 zeolite crystallite, has small granular and a multistage pore canal structure, larger surface area, shorter mass transfer route, good stability, and can be used for reactions for diffusion control or the surface activity site control. The method has short hydro-thermal treatment time, high crystallinity and yield and the like, and is convenient to separate the ZSM-5 zeolite.

The invention provides a cordierite-based nanometer glass-ceramic. The cordierite-based nanometer glass-ceramic comprises a main component, a nucleating agent, an adjustment object and a fluxing agent, wherein the main component comprises SiO2, MgO and Al2O3; the nucleating agent comprises one or a plurality of TiO2, ZrO2 and P2O5, and accounts for 2.0-20wt% of the main component; the adjustment object comprises one or a plurality of CaO, Na2O and K2O, and accounts for 0.1-1wt% of the main component; and the fluxing agent comprises B2O3, and accounts for 1.0-3.0wt% of the main component. The cordierite-based nanometer glass-ceramic provided by the invention has higher mechanical properties.

The subject invention concerns the use of staple length nano polytetrafluoroethylene (PTFE) crystallites obtained by liquid shearing PTFE dispersion particles that are wet by a liquid with a surface tension below 30 dynes/cm this liquid will spread on PTFE resin surfaces and has a contact angle of zero (0) degrees with a PTFE surface. Staple length PTFE resin micro-fibers will form rapidly under high liquid shearing force at 125° C. when diluted 1 part PTFE resin to 20 parts liquid. The subject invention also includes the application of products that are multi-directional planar oriented and isotropic as sheet, membranes and structures useful for high performance filtering, fuel and solar cells and related energy applications. It also concerns products made from formulations as coatings and product for forming, shaping and molding sheet and structures of the subject invention and methods of adhering, bond and laminating components of these structures without adhesives.

A method is provided for fabricating composite nonlinear optical (NLO) organic films that are suited for use in NLO device applications. The highly NLO properties of these films arise from the vector alignment of "guest' NLO molecules in a self-ordered nano-structured liquid crystal "host' film. Field-poling is used to remove the centro-symmetry. The "guest' concentration is increased by film processing to incorporate oriented nonlinear nano-crystallites to increase nonlinearity. NLO devices based on such films are of low cost and permit fast switching in a compact device format.

The invention provides a method for preparing calcium aluminosilicate nanometer microcrystal glass by utilizing natrium silica calcium glass waste slag. The method comprises the following steps: 1) classifying, grinding and screening natrium silica calcium glass waste slag to prepare glass powder; 2) adding silicon dioxide, calcium oxide, aluminum oxide, boron oxide, TiO2/P2O5 composite nucleating agent and rare-earth oxide to ensure that component requirement of the calcium aluminosilicate (CAS) microcrystal glass can be fulfilled; 3) filling the uniformly mixed glass materials into a high-alumina crucible, and pouring into a die to press and mold; and 4) putting the pressed glass plate in a muffle furnace for heat treatment, cooling to room temperature with the furnace after heat treatment to obtain the CAS nanometer microcrystal glass. The method has the advantages that: (1) the mechanical performance of the microcrystal glass is greatly improved; and (2) the additive dosage is adjusted according to the component composition of the glass residues to ensure that the glass achieves the regulated formula proportion. The method is suitable for the conventional various civil natrium silica calcium glass waste slag.

The invention relates to a nonvolatile charge capture type storage device, a preparation method thereof and application. The preparation method is characterized by simple operation and easy control. The nanometer microcrystalline as a storage medium has a uniform distribution in the storage device obtained. The preparation method of the nonvolatile charge capture type storage device comprises thefollowing steps: a) forming a tunneling layer on the substrate surface; 2) forming a uniform (ZrO2) x (M) 1- x film as an accumulation layer on the tunneling layer, wherein x is larger than 0.5 and less than 1 and the M is SiO2 or Al2O3; c) forming a barrier layer on the accumulation layer; d) annealing the sample prepared and precipitating the ZrO2 nanometer microcrystalline from the accumulation layer to be the storage medium. According to the invention, a means of high temperature annealing processing is used to precipitate the ZrO2 nanometer microcrystalline from the accumulation layer parent phase, thereby realizing an effect of nanometer microcrystalline storage. According to the method, the nanometer microcrystalline obtained as the storage medium has a uniform distribution in the amorphous parent phase.

The subject of the present invention is a method of producing, properties and applications of crystalline metallic nano-particles (nano-crystallites) and colloids thereof manufactured using an electrical, non-explosive method of degrading metals and their alloys as well as the crystalline metallic nano-particles (nano-crystallites) themselves, and in particular their shape, composition, structure and characteristic properties

The invention relates to a preparation technique for thermal spraying nano-microcrystalline enamel. The process comprises the steps that 1, an enamel glaze block is prepared, specifically, a raw material prepared according to a formula and mixed uniformly is fed into a high-temperature furnace to be melted sufficiently at the temperature of 1300-1500 DEG C and is subjected to water quenching to obtain the homogeneous enamel melted glaze block; 2, thermal spraying powder is prepared, specifically, the melted glaze block is smashed and ground, enamel pre-grinding powder is obtained, 5-30% of nano-silica is added into the pre-grinding powder, mixing granulation is carried out, and the nano-microcrystalline enamel powder for thermal spraying is obtained; and 3, thermal spraying and overall crystallization are conducted, specifically, the enamel powder is uniformly sprayed on the surface of a workpiece through a thermal spraying gun, and the powder is melted and liquefied in the process of being spayed out from the spraying gun and is cooled and solidified after being sprayed on the surface of the workpiece; the obtained enamel layer is a multiphase composite material with nanocrystallines, microlite and glass being interwoven together. The enamel layer has the characteristics of being good in corrosion resistance, high in density, good in toughness, high in impact resistance, capable of being formed at a time and low in manufacturing cost.

The invention relates to a preparation method of an indium antimonide nanocrystal, belonging to the technical field of a composite nanocrystal material. The product of the preparation method is the indium antimonide nanocrystal. The preparation method of the indium antimonide nanocrystal comprises steps of: mixing Sb2O3, In(NO3)3.9/2H2O, PEG200 (polyethylene glycol) with ethanediol in a 250ml three-necked flask, wherein the mixture is taken as growth solution; dissolving NaBH4 into ethidene diamine to be taken as storage solution; performing the oil bath on the growth solution until the temperature of the solution is 140 DEG C under the protective atmosphere of the nitrogen, and keeping the magnetic stirring for 30 minutes; adjusting the oil bath temperature at reaction temperature (120 DEG C-180 DEG C); fast injecting the storage solution into the growth solution (-2S) by a needle cylinder, and keeping the oil bath temperature and the magnetic stirring; sampling reaction solution within the reaction time from 5 minutes to 5 hours; and adding the alcohol with proper amount into the sampled reaction solution, and centrifuging for 20 minutes at the rotation speed of 15000rpm to separate the product (InSb). The preparation method is a liquid phase preparation method for preparing the InSb nanocrystal at a lower temperature (120-180 DEG C), wherein the method is high-efficiency, low-priced, free of catalytic agent and relatively safe; the prepared product is stable in property, and even in particle; and the preparation method can be used for providing the indium antimonide nanocrystal which is suitable for a high-speed electronic component, a magnetic component, and a far infrared-waveband photoelectric component.

The invention discloses a nanometer microcrystal mixed optical structure back projection high-definition image film. The nanometer microcrystal mixed optical structure back projection high-definitionimage film comprises a substrate layer, a nanometer microcrystal and nanometer micro ball mixed imaging coating layer and a back adhesive layer; the nanometer microcrystal and nanometer micro ball mixed imaging coating layer is formed by uniformly coating one surface of the substrate layer with nanometer microcrystal, nanometer micro balls and an adhesive based on a proportion; and the back adhesive layer is arranged on the other surface of the substrate layer for pasting external supports. The nanometer microcrystal and the nanometer micro balls are mixed and coated on the substrate layer, sothat compared with an image film with separated inorganic silicon particle coating layer and glass micro ball coating layer, the image film disclosed in the invention can eliminate projector light source light spots in a more all-around manner, the image angle of visibility can be enlarged to 178 degrees, and brightness, color saturation degree and light resistance and eye protection performanceof the projection image are improved, so that the image film is applicable to all projectors of different lenses on the market.

A photocatalyst powder is provided. The photocatalyst powder includes a plurality of nano crystallite aggregates formed by a plurality of nano crystallites. Each of the nano crystallites exhibits a single crystal structure. The nano crystallites have different compositions, different crystal phases, and different lattice constants from each other. An example of the nano crystallites is represented as the formula of ZnO_1-xS_x with different x values in each of the nano crystallites. In addition, a hydrogen producing system is also provided.

The invention discloses a titanium dioxide nanorod-nanocrystalline-nanoflower material and a preparation method thereof. The structure of the material is as follows: the titanium dioxide nanorod is positioned at the bottom, the titanium dioxide nanocrystalline is positioned in the middle layer, and the titanium dioxide nanoflower is positioned on the top. The preparation process comprises the steps that titanium dioxide P25 powder and ethyecellulose are respectively prepared into ethanol solution, terpilenol and n-butyl alcohol are added to the ethanol solution, the ethyl alcohol is evaporated through water bath reaction, and titanium dioxide slurry is obtained after grinding; the titanium dioxide slurry is printed on conductive glass through the screen printing technique, and is dried under natural condition; deionized water, concentrated hydrochloric acid and butyl titanate are added to a reactor, and the conductive glass is obliquely put into reaction solution to be subjected to reaction, and the material is obtained. The titanium dioxide nanorod-nanocrystalline-nanoflower material and the preparation method thereof have the advantages that the material and the preparation method are simple and feasible, the energy consumption is low, the preparation cycle is short, the industrial batch production is easy, and the prepared material is beneficial to improving the efficiency of a dye-sensitized solar cell.

The invention relates to a method for surface modification of ZnSe:Ag quantum dots, and belongs to the technical field of composite nano microcrystalline materials. A preparation method comprises the steps: based on the preapred ZnSe:Ag quantum dots, thiourea and ZnTe are adopted for modifying the surface of the quantum dots. The modification process is carried out in a water phase, and the reaction temperature is 100 DEG C. Thiourea is used for direct surface modification to form ZnSe:Ag/ZnS quantum dots; ZnTe modification adopts a prepared Te source, that is to say, sodium borohydride (NaBH4) and a Te powder are utilized to undergo a reaction to prepare sodium hydrogen telluride (NaHTe), then NaHTe is injected into the prepared ZnSe:Ag quantum dots, and a reaction of the two components is carried out to generate a ZnSe:Ag/ZnTe quantum dot solution. The obtained product is uniform in dispersion, good in stability, and little in aggregation, and can be applied to the fields of biological fluorescent labeling, drug separation and some optoelectronic devices.

The invention discloses a preparation method of a strontium titanate nano material with an adjustable morphology. The method comprises the following steps: uniformly mixing a strontium nitrate solution, a sodium hydroxide solution, a butyl alcohol solution of n-butyl titanate and a butyl alcohol solution of oleic acid, and carrying out a hydrothermal reaction at 100-200 DEG C for 6-24 hours to obtain the strontium titanate nano material. Through the influence of micelles formed by self-assembly of oleic acid molecules on the dynamic behavior of directional adsorption of SrTiO3 nano micro-crystals, the morphology is finally regulated and controlled, and the prepared SrTiO3 nano material is good in dispersity, high in photocatalytic efficiency and beneficial to later application of photocatalytic devices.

The invention discloses a nano microcrystalline cubic nitrification boron nitride abrasive cloth and a method for making the same. The method comprises: metal layers are distributed at intervals and coated on both sides of a substrate correspondingly, and the nano microcrystalline cubic boron nitride is embedded in the metal layers. Because the upper side and the lower side of the substrate are coated, metal base layers are formed at intervals on the substrate, and the nano microcrystalline cubic boron nitride is embedded in the metal layers simultaneously, the firmness strength of the nano microcrystalline cubic boron nitride powder embedded in the metal layers is higher. The formed nano microcrystalline cubic nitrification boron nitride abrasive cloth has the advantages of abrasion resistance, long service life, wide processing range and high polishing and grinding precision. The coated metal base layers are arranged at intervals on the nano microcrystalline cubic nitrification boron nitride abrasive cloth to make the abrasive cloth have certain flexibility, so the abrasive cloth can be used for precisely polishing and grinding products with multi-curve surfaces and complicated shapes.

The invention provides a preparation method and application of a nano microcrystalline cellulose/dopamine composite film, and relates to the field of semipermeable film materials, and the method comprises the following steps: preparing prefabricated cellulose; preparing nano microcrystalline cellulose;mixing the nano microcrystalline cellulose, dopamine, K-carrageenan and N-methyl morpholine oxide, heating to 110-120 DEG C, stirring for 30 to 40min, dissolving and clearing, adding a trihydroxymethylaminomethane buffer solution to adjust the pH value to 8-9, standing for 20 to 25h, decompressing and defoamingtoobtain a film solution, casting the filmsolution onto a polytetrafluoroethylene glass plate, putting the mixture into a drying oven to be subjected to vacuum drying for 10 to 15h at 30 to 50 DEG C, immersing the polytetrafluoroethylene glass plate into deionized water, scraping afilm off by a scraper, and drying to obtainthe nano microcrystalline cellulose/dopamine composite film.The nano microcrystalline cellulose/dopamine composite film has the advantages of good ion removal rate (up to 99% or above), extremely high water flux, extremely high application prospect in sewagetreatment and sea water desalination, and good mechanical property and swelling property.

The invention provides a nanocrystalline plate, which comprises a foam nanocrystalline glass layer, a colored nanocrystalline glass layer and a TiO2-SiO2 antibacterial coating from bottom to top, wherein the colored nanocrystalline glass layer is formed by melting upper-layer colored nanocrystalline blocks and lower-layer colored nanocrystalline powder and has texture within the layer. A preparation method for the nanocrystalline plate comprises the following steps: a. grinding broken nanocrystalline plates into powder; b. mixing nanocrystalline glass powder, a foaming agent and a foam stabilizer to prepare a foam glass ceramic mixture; c. successively putting the foam glass ceramic mixture, the colored nanocrystalline powder and the colored nanocrystalline blocks into a refractory mold; d, carrying out firing, melting and foaming; and e, successively carrying out coating with TiO2-SiO2 gel and calcining. The nanocrystalline plate of the invention has good heat-insulating property, small specific gravity, high mechanical strength, beautiful appearance and good anti-bacterial effect; the water resistance of the nanocrystalline plate is improved by 50 to 60% compared with ordinary microcrystalline plates; and the nanocrystalline plate can be widely applied to interior decoration.

The invention relates to a bionic enamel zirconia ceramic material block, a dental prosthesis and a preparation method. The bionic enamel zirconia ceramic material block comprises a functional wearing layer; the functional wearing layer comprises zirconia and a stabilizer used for stabilizing the zirconia; the zirconia is formed by zirconia nano crystallites; intragranular defects are formed in the nano crystallites; the outer surface of the functional wearing layer is used for forming an occlusal surface; and the functional wearing layer is used for simulating the straight enamel rod layer of natural tooth enamel. According to the technical scheme disclosed by the invention, the situation that the dental prosthesis excessively abrades jaw teeth can be relieved; the obtained zirconia ceramic material block has the advantages of high strength, low hardness and low elastic modulus; the probability of breaking of the bionic enamel zirconia ceramic material block and the dental prosthesis is reduced; the service lives of the tooth prosthesis and the jaw teeth are prolonged; in addition, the appearance of the bionic enamel zirconia ceramic material block and the appearance of the dental prosthesis are very similar to the appearance of natural teeth; and the bionic enamel zirconia ceramic material block and the dental prosthesis have excellent light transmission, transparency and polishing degree.

The invention relates to a high-performance variable-valence metal ion oxide-containing microcrystalline glass electrode material and a preparation method and application thereof, and belongs to the field of energy storage and material preparation. The preparation method of the microcrystalline glass electrode material comprises the following steps: performing high-temperature heat treatment on oxide glass containing variable valence metal ions in an air or reducing atmosphere within a range higher than a crystallization initial temperature for 0.5-24 hours to prepare the high-performance nano microcrystalline glass electrode material containing variable valence metal ions. According to the invention, the content of low-valence metal ions in the glass is improved, so that the conductivity of an electrode is improved, the precipitation of crystals is promoted, and the energy storage site is improved; and the reversible capacity and the cycling stability of the glass electrode material containing variable valence metal ions are greatly improved. In addition, the preparation method is simple in production process and free of environmental pollution, and has an excellent development prospect.