43results about How to "Uniform and fine structure" patented technology

The invention discloses a production process of large isotropic and isostatic high purity graphite with fine particles, which comprises the following steps: processing prefabricated powder; processing prefabricated tablets; pressing prefabricated green bodies; processing prefabricated roasting scraps; processing prefabricated smashed coke powder; processing tablets; pressing green bodies; roasting and soaking; and graphitizing and finishing. A graphite product produced by the production process provided by the invention has a large size and has the diameter being more than phi 900; the strength, the density and the elasticity of the product are improved, and the mechanical behavior physical and chemical indicators of a final product is improved; and simultaneously, the produced graphite product has the characteristics of favorable isotropic performance, uniform and delicate structure, high volume density and the like.

Provided is a tantalum sputtering target containing 1 mass ppm or more and 100 mass ppm or less of molybdenum as an essential component, and having a purity of 99.998% or more excluding molybdenum and gas components. Additionally provided is a tantalum sputtering target according to the above further containing 0 to 100 mass ppm of niobium, excluding 0 mass ppm thereof, and having a purity of 99.998% or more excluding molybdenum, niobium and gas components. Thereby obtained is a high purity tantalum sputtering target that has a uniform and fine structure and which yields stable plasma and superior film evenness, in other words, uniformity.

Provided is a tantalum sputtering target, in which 1 mass ppm or more and 50 mass ppm or less of boron is contained as an essential component, and of which the purity excluding boron and gas components is 99.998% or higher. Thereby obtained is a high-purity tantalum sputtering target having a uniform and fine structure and enabling plasma stabilization and achievement of superior film evenness (uniformity).

The invention discloses a preparation method of a moisture absorbent with high water absorbility. The method comprises the steps that firstly, starch grafted sodium polyacrylate and sodium alkyl diphenyl ether disulfonate are added into propylene glycol and stirred for a period of time, calcium chloride and magnesium sulfate are added, and a microwave reaction is performed; then, reduced pressure distillation is performed to remove propylene glycol, solids are dried, and the moisture absorbent is obtained. The novel moisture absorbent is prepared in the mode of mixing water absorbent resin and an inorganic water absorbent, and the using effect is greatly improved compared with that of independent use of the water absorbent resin or the inorganic water absorbent; the sodium alkyl diphenyl ether disulfonate surface active agent is added, the components are mixed under the microwave condition, the uniform and close structure can be formed, and the fine crushing effect of the water absorbent is improved; compared with the prior art, the moisture absorbent has the high absorbility, is simple in technology and long in service life and generates no environmental pollution.

The invention discloses a processing method of special flour for fried bread stick, which is characterized by: (1) selection and purchase of the raw material (wheat): selecting 3-4 kinds of wheat for mixing and processing, with the hardness rate being 60-70 percent, the content of wet gluten being more than or equal to 30 percent, the water absorption rate being higher than or equal to 60 percent, the stabilizing period being more than or equal to 6 minutes, the ductility being more than or equal to 150mm, the tensile resistance being 400-500BU and other indicators in line with the second-grade requirements in the national standard; (2) cleaning process: removing various impurities, and ensuring that the impurity content in the wheat to be milled satisfies the national standard; and (3) milling process: completely milling and screening to reduce the floating impurities and the ash content in the flour; adopting the milling process of removing husks five times, removing cores eight times, removing slag twice and removing residues twice, purifying 5-6 times, using the coproduction technology so that the extraction proportion of the special flour for the fried bread stick reaches 12-15 percent, and extracting during the preceding husk milling, residue milling and rescreening. The fried food produced with the special flour for the fried bread stick of the invention can reduce the oil absorption rate of the product, and has an enlarged size, a fine and uniform structure, a crispy taste and a golden color.

The invention discloses a nano ferrite material, and a preparation method thereof. The preparation method comprises following steps: 1) Fe(NO3)3, Zn(NO3)2, Ni(NO3)2, and Cu(NO3)2 are taken as initial raw materials, the weight of the materials is calculated based on a molecular formula Ni(1-a-b)ZnaCubFecO4, and a mixed metallic nitrate solution is prepared, wherein 0.4<=a<=0.45, 0.15<=b<=0.2, and 1.9<=c<=1.96; 2), a NaOH solution with a molar concentration ranging from 1 to 10mol / L is added into the mixed metallic nitrate solution so as to obtain a precipitate; 3), hydro-thermal synthesis is carried out; 4), the precipitate is washed and dried; 5) Bi2O3 with a weight ratio ranging from 0.05 to 0.5wt% and MoO3 with a weight ratio ranging from 0.05 to 0.2wt% are added, an obtained mixture is subjected to ball milling and drying, and a binder is added for pelleting; and 6) compacting and sintering are carried out. The nano ferrite material is high in magnetic conductivity and saturation magnetic induction intensity; and a crystal grain structure is uniform and fine.

The invention discloses a preparation method of a high-silicon aluminum alloy electronic packaging material. The preparation method is characterized by comprising the steps: firstly, obtaining a high-silicon aluminum alloy plate with required silicon content through a traditional casting method; then refining the high-silicon aluminum alloy plate by a rapid solidification method to obtain thin strip-shaped high-silicon aluminum alloy; finally, superposing a plurality of pieces of thin strip-shaped high-silicon aluminum alloy according to the required thickness, and performing hot-press formingto obtain the high-silicon aluminum alloy electronic packaging material with the required silicon content. According to the preparation method, a plurality of advanced preparation processes such as arapid solidification method and a hot pressing method are comprehensively adopted, on the premise of keeping relatively high silicon content, and the high-silicon aluminum alloy electronic packagingmaterial which is nearly completely densified and has two uniformly distributed phases of aluminum matrix and fine silicon is obtained, and has the advantages of simple operation, simple equipment, low porosity, excellent performance, environmental friendliness, mature technology and the like.

The invention discloses a combined continuous rolling and continuous drawing machine with three sets of double-roller rolling machine and seven die drawing machines. According to the invention, a rod charging device is provided with a copper rod inlet and a copper rod outlet; the copper rod outlet corresponds to the first rolling channel inlet of the three sets of double-roller rolling machine; the rolling channel outlet of a previous set of the three sets of double-roller rolling machine corresponds to the rolling channel inlet of a next set of the three sets of double-roller rolling machine; the rolling channel outlet of the last set of the three sets of double-roller rolling machine corresponds to the first drawing channel inlet of the seven die drawing machines; the drawing channel outlet of a previous die of the seven die drawing machines corresponds to the drawing channel inlet of a next die of the seven die drawing machines; the last drawing channel outlet of the seven die drawing machines corresponds to the inlet of a constant-speed wheel; the outlet of the constant-speed wheel corresponds to the inlet of an annealing device; the outlet of the annealing device corresponds to the inlet of a wire-storing wheel set; and the outlet of the wire-storing wheel set corresponds to the inlet of a wire take-up device. With the combined continuous rolling and continuous drawing machine provided by the invention, an 8-mm oxygen-free copper rod can be drawn into a copper wire with a desired specification after rolling by the three sets of rolling machine, so a copper wire with a diameter of 0.10 mm or below can be produced through processing; the processed copper wire has a uniform and fine lattice structure, which is beneficial for reduction in defects and continuation of advanced processing; and energy consumption in production of copper wires with unit weight is substantially decreased.

The invention discloses a corn starch-based foaming material and a preparation method thereof. The preparation method includes the steps: (1) uniformly stirring and mixing starch, hydrogen peroxide, ferrous sulfate, water and citric acid, heating mixture to perform oxidation reaction, and cooling and discharging the mixture to obtain a component A for standby application; (2) uniformly stirring and mixing polyvinyl alcohol (PVA), plasticizers and sodium hydrogen carbonate to obtain a component B for standby application; (3) uniformly stirring and mixing the component A, the component B, amideadditives, ethylene-acrylic acid (EAA) copolymers and talcum powder, extruding mixture by a single screw extruder with high compression ratio to obtain the starch-based foaming material. The starch-based foaming material has high resilience ratio and foaming ratio, the compression resilience ratio is higher than or equal to 95% when relative humidity is lower than or equal to 50%, the compressionresilience ratio is higher than or equal to 80% when relative humidity is higher than or equal to 90%, and the overall foaming ratio is higher than or equal to 25 times.

The invention relates to the technical field of quick-frozen food and specifically relates to a low-sugar yacon sweet dumpling. Yacon is taken as a main raw material of the sweet dumpling; the yacon is effectively prevented from browning and the flavor of yacon is kept in the manner of wrapping the yacon with starch paste; low-calorie sweet raw materials, including inulin, trehalose and xylitol, are also added, so that the low-sugar yacon sweet dumpling with nice taste can be acquired.

The invention discloses a copper-based pantograph carbon contact strip made from a graphene copper-based nano selenium niobium composite material. The graphene copper-based nano selenium niobium composite material is prepared from, by weight, 70-75% of a mixture and 25-30% of an adhesive by mixing, pressing, calcining and copper impregnating. By adoption of a preparation method of the copper-basedpantograph carbon contact strip, the copper-based pantograph carbon contact strip is high in abrasion resistance, low in friction coefficient, high in conductivity and great in cost performance and impact resistance, problems in use of existing pantograph carbon contact strips are effectively solved, and high practicality is realized.

Provided is a sputtering target and / or a coil disposed at the periphery of a plasma-generating region for confining plasma. The target and / or the coil has a surface to be eroded having a hydrogen content of 500 μL / cm2 or less. In dealing with reduction in the hydrogen content of the surface of the target and / or the coil, the process of producing the target and / or the coil, in particular, the conditions for heating the surface of the target and / or the coil, which is thought to be cause of hydrogen occlusion, are appropriately regulated. As a result, hydrogen occlusion at the surface of the target can be reduced, and the degree of vacuum during sputtering can be improved. Thus, the present invention provides a target and / or a coil that has a uniform and fine structure, makes plasma stable, and allows a film to be formed with excellent uniformity and provides a method of producing the target and / or the coil.

The invention discloses large-specification fine-grain isotropic isostatic-pressing high-purity graphite mainly composed of components of, by weight: 52-65 parts of material powder, and 35-48 parts of modified pitch. The material powder is composed of components of, by weight: 75-94 parts of prefabricated crushed coke powder, 2-18 parts of graphite powder, and 2-8 parts of an additive. The prefabricated crushed coke powder is composed of components of, by weight: 52-65 parts of prefabricated material powder, and 35-48 parts of modified pitch. The prefabricated material powder is composed of components of, by weight: 52-85 parts of petroleum coke, 2-20 parts of graphite powder, 6-45 parts of a carburant, and 3-12 parts of fine powder. The production specification of the graphite is large. According to the invention, production of graphite with a large-specification of phi900 can be realized. The graphite is advantaged in high strength, high density, good elasticity, excellent mechanical properties, and excellent physical chemical index. The graphite material is advantaged in low porosity, good quality, uniform and delicate structure, and relatively high volume density.