294results about How to "Evenly distributed ingredients" patented technology

The present invention discloses one kind of hot sprayed WC / Co powder and its coating and their preparation. The hot sprayed WC / Co powder consists of Co 5-25 wt%, C 5-6 wt%, and W for the rest, and is in spherical granular structure of size below 150 micron. The powder is prepared through the following steps: 1. sieving, washing and stoving W powder; 2. spheroidizing W powder; 3. carbonizing spheroidized W powder; and 4. coating with Co to form the WC / Co powder. The hot sprayed WC / Co coating is prepared through spraying the WC / Co powder with ultrasonic flame. The WC / Co powder is compact, high in flowability and homogeneous in components; and the hot sprayed WC / Co coating is compact and homogeneous, and has close combination with the base, micro hardness up to 894HV0.2 and wide application.

The invention relates to a preparation method of micro / nano-high-purity tungsten powder. Tungstate is dissolved in deionized water, excessive dilute nitric acid or hydrochloric acid is added to allow the mixture to fully generate yellow precipitation, dilute ammonia water is added to fully convert the yellow precipitation to transparent colloid under the stirring condition, a surfactant is added and is evenly dissolved by strong stirring; the hydrothermal reaction is carried out, a product after the hydrothermal reaction uses the deionized water or ethanol for cleaning and filtering, precursor powder is obtained by drying; and the precursor powder is carried out the reduction to obtain the high-purity micro / nano-tungsten powder. The micro / nano-tungsten powder which is prepared by using the invention is characterized by fine particle size, even distribution of the components and high purity, the specific surface particle size and the powder morphology analyzing particle size after the diffusion are less than 80nm, the tungsten particle size of the powder is 20 to 30nm, the powder is spherical or nearly spherical, the oxygen content is lower than 0.18 percent, the tungsten content is more than 99.5 percent, and the powder has good formability and sintering activity.

The invention relates to a method for preparing an absorbing layer of a thin film solar cell, belonging to the technical fields of photoelectric functional material and new energy. The method is characterized in that a Cu-In-Se absorbing layer, a Cu-In-Ga-Se absorbing layer or a Cu-In-Al-Se absorbing layer is prepared by a vacuum magnetron sputtering method; a Cu-In-Se alloy target, a Cu-In-Ga-Se alloy target or a Cu-In-Al-Se alloy target is directly used, and the components of the absorbing layer are controlled by the components of the target; and the film formation quality is controlled by the sputtering technology. The absorbing layer prepared by the magnetron sputtering method can be subsequently treated by annealing in the protection atmosphere, so that the crystallization quality is further improved. The absorbing layer prepared by the method is formed by uniform Cu-In-Se phase, Cu-In-Ga-Se phase or Cu-In-Al-Se phase, so that the component distribution is even, and the components of the absorbing layer are consistent with the components of the target. The method is simple and convenient in technique, easy to control and lower in matrix temperature when in deposition, can select multiple substrates, and ids suitable for industrialized production.

The invention discloses a high-conductivity (63 percent IACS) hard aluminum wire and a preparing technology thereof. The preparing technology of the high-conductivity hard aluminum wire comprises the following steps that firstly, a high-conductivity aluminum rod is prepared in a continuous casting and rolling mode; secondly, the high-conductivity aluminum rod is drawn into high-conductivity aluminum wires which are drawn through various dies, wherein the coefficient of elongation of the last die is controlled within 1.35-1.50, and the coefficients of elongation of the other dies are controlled within 1.30-1.40; thirdly, a plurality of high-conductivity aluminum wires are twisted, the pay-off tension is controlled in the twisting process, the control air pressure is smaller than or equal to 3 kilograms, the tensile strength of the manufactured single hard aluminum wire is larger than or equal to 160 MPa, and the conductor resistance is smaller than or equal to 0.027366 Omega*mm<2> / m when the temperature is 20 DEG C. The tensile strength of the manufactured single hard aluminum wire in an overhead conductor is larger than or equal to 160 MPa, the conductor resistance is smaller than or equal to 0.027366 Omega*mm<2> / m when the temperature is 20 DEG C, the tensile strength of the hard aluminum wire is kept, the conductivity of the hard aluminum wire is increased to 63 percent IACS, and the conductivity is increased by 3.28 percent compared with the stipulated conductivity of a hard aluminum wire in common GB / T17937-2009. The high-conductivity hard aluminum wire is used in the overhead conductor, the loss of the circuit electric energy can be greatly reduced, the circuit operation cost is reduced, and the carrying capacity of the wire can be obviously improved.

The invention provides a thermal mold casting method. The thermal mold casting method is characterized by comprising the following steps of: heating a casting mold by a heater, or heating the casting mold by utilizing heat conducted by a metal melt before entering the casting mold so as to maintain the temperature of the casting mold to be in the range lower than the temperature of a solid phase line of metal and higher than the cooling temperature of the casting mold; carrying out forced cooling on the metal by a cooler arranged near an outlet of the casting mold; and drawing a metal casting blank by using a traction mechanism. The thermal mold casting method provided by the invention has the advantages that the application range is wide, the promotion value is very large, high-quality metal casting blanks with excellent performance, good surface smoothness, high size accuracy, high compactness, more uniform components, columnar crystal parallel or approximately parallel to the jiggering direction in the metal and isometric crystal concurrent microstructures on the surface layer of the metal can be produced with low energy consumption and high efficiency, and the subsequent plastic processing with a large screw-down rate can be carried out according to the need.

The invention discloses an Nb-Si intermetallic compound bar. The Nb-Si intermetallic compound bar is prepared from, by atomic percentage, 35%-45% of silicon, and the balance niobium and inevitable impurities. The invention further discloses a preparation method of the Nb-Si intermetallic compound bar. The preparation method includes the steps that 1, silicon powder and niobium powder are ball-milled and dried to obtain mixed powder; 2, a blank is formed after compression molding, the blank is sintered, and then an Nb-Si intermetallic compound sintered body is obtained; 3, an Nb-Si intermetallic compound cast ingot is obtained after electric arc melting, and a semi-finished bar is obtained after cutting; and 4, the Nb-Si intermetallic compound bar is obtained after electron beam zone melting. The Nb-Si intermetallic compound bar has the beneficial effects of being high in quality and purity, low in oxygen mass content and uniform in component distribution, the bar is further crushed into powder to serve as a raw material for preparing a high-temperature oxidation-resistant coating and also serve as a strengthening phase of a super-high-temperature oxidation-resistant material, and broad application prospects are achieved in the aerospace field.

The invention discloses a flat plate solar energy heat absorption coating. A light absorption agent, a film forming agent, a solvent and an addition agent are evenly scattered in a ball milling mode, then a film forming addition agent is added into the mixture to be mixed to be uniform, and therefore the flat plate solar energy heat absorption coating is obtained. The flat plate solar energy heat absorption coating is prepared from, by weight, 50-100 parts of the film forming agent, 10-30 parts of the film forming addition agent, 35-55 parts of the light absorption agent, 20-50 parts of the solvent and 10-30 part of the addition agent. The film forming addition agent is ethylene glycol monobutyl ether, triethylene glycol monomethyl and the like. A preparation method of the film forming agent comprises the steps that casein and gelatin are mixed according to the weight ratio of 5-10:2-3, water is added into the mixture, the mixture is soaked at the temperature of 15-22 DEG C and then transferred to a plate under the normal temperature, a mixture solution with methyl methacrylate and polysiloxane quaternary ammonium sodium with the ratio of parts by weight of 1-2:1-3, the mixture is stirred and then irradiated by ultraviolet light for 10-15 min, and then modified casein-gelatin is obtained. The film forming agent is modified and then used as the important raw material of the coating, so that the prepared coating has the good weather resistance and water resistance under the outdoor conditions, the preparation technology is simple and easy to understand, and the heat absorption efficiency of the heat absorption coating is ensured.