62 results about "Average diameter" patented technology

The invention provides an L-band wave-absorbing material and a preparation method thereof, the wave-absorbing material comprises a Fe-Si-Al composite material, and the composite material is Fe-Si-Al soft magnetic particles with oxide layers formed on the surfaces; wherein the content of each element in the raw materials of the Fe-Si-Al soft magnetic particles is as follows: 84.5 to 85.5 weight percent of Fe, 9.5 to 10 weight percent of Si and 5 to 5.5 weight percent of Al; the diameter-thickness ratio of the Fe-Si-Al soft magnetic particle raw material is 50-100, and the average diameter of the Fe-Si-Al soft magnetic particle raw material is 20-40 [mu] m; and the thickness of the oxide layer is 5-12 nm. The wave-absorbing material disclosed by the invention has excellent low-frequency wave-absorbing performance and has the characteristics of being thin, light, wide and strong; the impedance matching Z of the wave-absorbing material is larger than or equal to 4, the minimum reflectivity of a product with the thickness being 5 mm is smaller than-10 dB within 1-2 GHz, and the wave-absorbing material can be suitable for being used under multiple wavelengths of the L wave band and meets the use requirement of the wave-absorbing material.

The invention discloses a high-toughness coating and a manufacturing method thereof, and belongs to the field of coatings. The high-toughness coating is a pure Cr layer and comprises a matrix layer and modified areas, the average grain size of the matrix layer ranges from 0.1 micrometer to 0.8 micrometer, the average grain size of the modified areas ranges from 1 micrometer to 2 micrometers, the average diameter of the modified areas ranges from 5 micrometers to 15 micrometers, and the interval between every two adjacent modified areas ranges from 0.5 mm to 1.5 mm. The high-toughness coating has good toughness and oxidation resistance, and can effectively prolong the service life and improve the reliability of the zirconium alloy in a high-temperature and high-pressure corrosion environment.

The application discloses a light diffusion plate foaming light-weight structure and a preparation method thereof. The structure comprises upper surface layer, first foaming layer, second foaming layer and lower surface layer connected in sequence. The thickness of the first foaming layer is less than that of the second foaming layer, and the average cell diameter of the first foaming layer is less than that of the second foaming layer. The application adopts the combination of the first foaming layer with small cell diameter and thin thickness and the second foaming layer with large cell diameter and thick thickness, improves the structure of the foaming light diffusion plate, and makes the density of the foaming light diffusion plate as low as 0.3 g / cm 3 , which is 50% lower than 0.85 g / cm 3 of the prior art, and the cost is significantly reduced, so that the application has obvious advantages in market competition. The average density, light transmittance and haze of the light diffusion plate can be regulated by adjusting the thickness or the average cell diameter of the first foaming layer and the second foaming layer.

The present invention pertains to a composite material comprising (a) at least one type of curable resin and (b) at least one type of aramid single fiber, wherein the average diameter of the aramid single fiber (b) as determined by a centrifugal sedimentation method is less than 2000 nm. According to the present invention, an article having excellent mechanical properties can be produced.

The application discloses a cold-rolled fine-blanking steel and a manufacturing method thereof. By optimizing the chemical composition and microstructure of the cold-rolled fine-blanking steel, the C content is controlled to be 0.30%-0.47%, the strength and hardness after quenching can be ensured, the Mn content is controlled to be 1.0%-1.5%, the hardenability of the steel can be improved, the hot brittleness can be prevented, and the forgeability and plasticity of the steel are improved; meanwhile, the number ratio of the spheroidal carbide is controlled to be greater than or equal to 90%, the average diameter of the spheroidal carbide is adjusted to be 0.5-0.8 mu m, any spheroidal carbide particle A is selected in a 1000 times metallographic graph of a cross section of the steel, another spheroidal carbide particle B exists in a circular area with the particle A as a center and a radius of 2 mu m, a sector with a center angle of 30 degrees and symmetrically distributed along the thickness direction of the steel is taken in the circular area, and the particle B does not fall into the sector, so that the size of the spheroidal carbide is smaller and the distribution of the spheroidal carbide is more uniform, and therefore the semi-punching limit depth can be increased.

The present application belongs to the technical field of hot stamping part preparation, and particularly relates to a tailor-welded part, a manufacturing method thereof and a welding wire applied to the tailor-welded part. The tailor-welded part comprises a welded joint, and a weld seam of the welded joint comprises acicular ferrite and martensite. The average length of the acicular ferrite is not greater than 80 microns, the average diameter is not greater than 15 microns, and the volume percentage of ferrite in the weld seam is 0.1-10%. The tailor-welded part is a part after hot stamping treatment. The joint elongation of the tailor-welded part is greater than 4%, the weld seam structure is martensite and ferrite, the fracture position is located in the base material during the quasi-static tensile test, and the weld seam has good strength and ductility.

To provide a coated cutting tool capable of extending a tool life by having excellent wear resistance, chipping resistance and fracture resistance.SOLUTION: The coating layer includes a lower layer, an intermediate layer, and an upper layer in this order from the substrate side toward the coating layer surface side, the lower layer includes a specific Ti compound layer, and the intermediate layer includes an α - Al2O3 layer, wherein the upper layer includes a TiCN layer, an average thickness of the entire coating layer is 8.5 μm or more and 30.0 μm or less, an average thickness of the upper layer is 1.0 μm or more and 6.0 μm or less, and in the TiCN layer of the upper layer, an average diameter of a region in which an orientation difference B between a normal line of a cross section in a direction parallel to a surface of the base material and a (220) plane normal line is 0° or more and less than 15° is less than 5.0 μm, and in the TiCN layer of the upper layer, 20≤RSA≤70 and 20≤RSB≤60 are satisfied.SELECTED DRAWING: Figure 1

An object is to provide a polarizing element capable of reducing insertion loss and increasing extinction ratio by adjusting the particle diameter of metal microparticles.The polarizing element (1) of the present disclosure comprises a glass substrate (2), a plurality of cavities (3) formed inside the glass substrate extending in one direction, and metal microparticles (4) arranged within each cavity having a volume smaller than the cavities, and is wherein: an average diameter of the metal microparticles, along a transversal direction orthogonal to a longitudinal direction of the cavities, is 20 nm or less, and a particle diameter of the metal microparticles, at a cumulative frequency of 90%, is 30 nm or less.

The invention belongs to the field of abrasive grinding tools, and particularly relates to a wafer thinning grinding wheel and a preparation method thereof.The wafer thinning grinding wheel comprises a base plate 1, an abrasive coating 11 is fixed to the end face of the base plate 1, abrasive particles are arranged in the abrasive coating 11, and the abrasive particles comprise first abrasive particles 12 located at the bottom of the abrasive coating 11 and close to the end face of the base plate 1; the abrasive material further comprises second abrasive particles 13 arranged in a layer above the first abrasive particles 12, the average diameter of the first abrasive particles 12 is 110%-140% of the diameter of the second abrasive particles 13, and the minimum diameter of the first abrasive particles 12 is not lower than 70% of the maximum diameter.

The present invention provides a new pervaporation membrane suitable for separating a volatile organic compound from an aqueous solution containing the organic compound. A pervaporation membrane of the present invention includes: a separation functional layer; and a porous support supporting the separation functional layer. The porous support has a surface facing the separation functional layer, the surface including a plurality of opening portions. An average diameter of the opening portions is 0.5 μm or more. For the pervaporation membrane, a peeling strength measured by a test below is 0.15 N / 20 mm or more. Test: The pervaporation membrane is cut to 20 mm in width and 150 mm in length to give a test piece. The separation functional layer of the test piece is peeled off the porous support of the test piece at a peel angle of 180° and a tensile speed of 300 mm / min.

The application discloses a preparation process of an organic composite material with super-high salt resistance. The process comprises the following steps: obtaining the convex point shape and the convex point interval h in the micro-morphology of the film through calculation simulation; calculating the average diameter D of the convex point particles; performing heat curing treatment and de-agglomeration treatment on the dispersed polytetrafluoroethylene particles to obtain treated particles a; according to the h between the convex points, the configuration ratio of the treated particles a and the dispersed PTFE particles is obtained, the particles are mixed and stirred according to the ratio, and then fiberization treatment is performed to obtain treated particles b; the two kinds of particles are placed in layers, and an asymmetric film is formed through a stretching process; a fluorine monomer, an electrostatic conductive material and an alcohol solvent are mixed to obtain a prepared solution; the prepared solution is sprayed on the surface of a base material to obtain a treated base material; and the asymmetric film is hot-pressed and laminated on the base material to form the organic composite material. The film material is suitable for a flue gas filtration system in different industries, and is especially suitable for the purification of a medium-low temperature flue gas system with high salting-out degree.

The invention discloses a magnetic force rheological polishing solution containing graphene coated CIP composite particles and a preparation method of the polishing solution. The polishing solution comprises the following components in percentage by mass: 8-20% of rod-like mesoporous silica, 10-20% of graphene coated CIP composite particles and the balance of deionized water. 3%-10% of graphene coated CIP composite particles; 3%-10% of abrasive particles; 1%-3% of an additive; 65%-85% of polyethylene glycol; the average diameter of the rod-like mesoporous silica is 50nm-200nm, and the length-diameter ratio of the rod-like mesoporous silica is (3: 1)-(10: 1); the graphene-coated CIP composite particle is of a composite structure in which a reduced graphene oxide shell wraps a carbonyl iron powder CIP core; the average particle size of the graphene-coated CIP composite particles is 3-5 [mu] m, and the shell thickness of the reduced graphene oxide is 10-50 nm. The polishing solution can realize continuous and stable high-viscosity thickening performance, inhibits aggregation of magnetic particles, and has good oxidation resistance and suspension stability.

A lightweight aggregate according to an embodiment of the present disclosure is a granular body in which elevations with a mean diameter of less than 3.0 mm are distributed on its surface and the arithmetic mean roughness Ra of the surface without the elevations is in the range of 10 µm to 100 µm and its density is in the range of 0.9 g / cm3 to 1.3 g / cm3.

The invention discloses a closed-cell foam material for backpack equipment, the closed-cell foam material is composed of matrix resin and an elastomer component, the matrix resin is an ethylene-vinyl acetate copolymer in which the content of a vinyl acetate structural unit is 5%-15%; the closed-cell foaming material has the overall density of 0.05-0.08 g / cm < 3 >, and the average diameter of internal cells is not larger than 200 microns; the closed cell foam material exhibits a compression set rate of less than 5%. According to the closed-cell foaming material for the backpack equipment provided by the invention, light weight, high resilience and deformation resistance are realized through collaborative design of materials and a process.

To provide an Al bonding wire satisfying excellent temperature cycle reliability and a favorable 1st bondability. The Al bonding wire contains 3.0% by mass or more and 10.0% by mass or less of Si, and an average diameter of a Si phase in a cross section (L cross-section) in a center axis direction including a wire center axis of the Al alloy bonding wire is equal to or larger than 0.8 μm and equal to or smaller than 5.5 μm.

The application relates to a 6xxx series aluminum alloy plate strip with high bending performance, characterized by the following component mass percentage of the aluminum alloy plate strip: Si 0.5-1.3%, Mg 0.6-1.2%, Cu 0.5-1.1%, Mn 0.1-0.6%, Cr 0.1-0.3%, Fe<=0.50%, Ti 0.03-0.50%, and the balance being Al; the average grain size of the aluminum alloy plate strip in three directions is <=30 mu m, the average diameter of the second phase is <=3 mu m, the yield strength after baking is >=290 MPa, and the bending angle after baking is >=80 DEG. The application details the original grain size of the ingot, finally refines the grain size of the finished product, reasonably designs the quenching process, avoids the second phase precipitation, effectively controls the grain size of the 6xxx aluminum alloy and the precipitation of the second phase, greatly improves the bending performance of the plate strip, meanwhile, guarantees that the plate shape after quenching is not deteriorated, and makes the plate strip have the feasibility of industrial mass production.

The present invention relates to sports balls. A sports ball comprises a surface layer comprising a plurality of panels. The sports ball further comprises a lattice structure extending below the surface layer, wherein the lattice structure comprises a plurality of lattice cells comprising radially extending elements. The lattice cells which are adjacent to the surface layer have at least one dimension which is smaller than an average diameter of the panels.

One plastic intermediate film (100) comprising: a sound-insulating layer (200), wherein the sound-insulating layer (200) comprises a polyvinyl acetal resin, a plasticizer and a refractive index regulator (250), wherein the refractive index regulator (250) consists of particles with an average diameter (D 50 ) of 100 nm or less and has an absolute refractive index of 2.0 or more, wherein the refractive index regulator (250) is contained in an amount of more than 0 wt.% and 1 wt.% or less, based on the total sound-insulating layer and the plasticizer is contained in an amount of 33 to 41 wt.%, based on the total sound-insulating layer, the plastic intermediate film (100) further comprising a first layer (300, 320, 820) arranged on a surface of the sound-insulating layer (200), wherein the plastic intermediate film (100) has an Rsc value of 0 to 1 according to equation 1 below: Rsc = 1 − ( Refractive index of the first layer − Refractive index of the sound-insulating layer ) * 100.

Provided is a resin composition which, as a film, has a good elastic modulus while maintaining transparency (in particular, the average elastic modulus in the MD direction and the TD direction is 6.0 GPa or more). The resin composition is characterized by containing a resin component and a fibrous alumina filler, the resin component containing a resin having at least an amide structure, and the fibrous alumina filler containing a fibrous alumina filler dispersed in the resin composition in a state in which the average diameter is 4 nm to 30 nm and the average fiber length is 200 nm to 4,000 nm.

The present invention relates to a low viscosity CM-MFC comprising a degree of substitution of 0.2 to 0.29, preferably, at 1% w / w, using an R4 rotor, at 100 rpm, a viscosity of 6700 to 9900 cP, and at 0.8% w / w, using an R4 rotor, at 10 rpm, a viscosity of 65 to 85 cP; the present invention relates to a low viscosity CM-MFC and to a method for producing a low viscosity CM-MFC, the method comprising: defibrating the resulting CMC with a rotating disk and a stationary rotor using 4%-10% w / w aqueous dispersion to obtain a CM-MFC, the defibrating degree being such that the CM-MFC fiber average diameter is between 0.8 [mu] m and 8 [mu] m.

To provide a filter material and filter element with a long lifespan, which allows for a large amount of mist, dust, and other unwanted materials to be collected before a predetermined pressure loss occurs, because the pressure loss does not rise rapidly. [Solution] The filter material of the present invention consists of linear bodies with an average diameter of 100 μm or more, and comprises a three-dimensional mesh structure having raised portions where the linear bodies are mountain-shaped and recessed portions where the linear bodies are valley-shaped, and has a bulk density of 25 kg / m³ 3 A filter material having the following or a nonwoven fabric with a thickness of 8 mm or more, wherein the height of the raised portion is 6 mm or more.

The invention relates to a metal powder intended for use in an additive manufacturing method, the powder consisting of steel particles, wherein the average diameter of the steel particles is from 5 pm to 150 pm and the steel particles consist of, in mass percentages: C: 0.15% to 1.0%, N: 0.15% to 1.0%, Si: 0.1% to 2.0%, Mn: 10% to 25%, Cr: 5% to 21%, Mo: 0.1% to 3.0%, Ni: < 5%, the balance being iron and unavoidable impurities, the flowability of the metal powder determined according to ISO 4490 being less than 30 sec / 50 g. Reliable high-load components can be manufactured using the metal powder according to the invention by additive manufacturing. The metal powder according to the invention is therefore particularly suitable for manufacturing mechanical parts that are subjected to high loads and medical components for use in or on the human or animal body. The invention also provides a method that reliably enables the metal powder according to the invention to manufacture components with optimized mechanical properties on the basis of an additive manufacturing method.

Steel part having a chemical composition comprising, by weight %, 0.18≤C≤0.27, 0.18≤Si≤0.30, 1.0≤Mn≤1.5, 0.14≤Cr≤0.25, 0.02≤Al≤0.06, 0.02≤Ti≤0.06, 0.0020≤B≤0.0040, 0≤S≤0.008, 0≤N≤0.020, the remainder of the composition being iron and unavoidable impurities resulting from the elaboration process, having a microstructure including, in surface fraction, 95% or more of martensite and a prior austenite grain skin refinement ratio equal to or above 1.2, the ratio being defined as PAGS_B / PAGS_S, wherein PAGS_B is the average prior austenite grain diameter in the bulk (3) expressed in μm and PAGS_S is the average prior austenite grain diameter in the skin (2), also expressed in μm.

A method for formation of hardfacings on an article comprises producing, by powder metallurgy or additive manufacturing, an article having a discontinuous surface. The article is exposed to impact items and to tungsten carbide particles, provided as tungsten carbide particles comprised in the impact items and / or tungsten particles provided directly in a process fluid as a dispersion. At least 80% of the tungsten carbide particles have particle sizes within the range of 0.1-5 μm. The impact items are bodies with an average diameter within the range of 0.1 to 10 mm. A velocity difference is created between the surfaces and the impact items, causing impacts between the impact items and the surfaces, giving polishing, induction of compressive stress, and / or densification of the surface. Tungsten carbide particles are embedded, hammering the tungsten carbide particles into the article by use of the energy of the impacts.

The invention discloses a method for improving the lifting effect of a buried hill deep well. The method comprises the steps that the predicted yield of a current oil well is obtained; selecting a target centrifugal pump of which the theoretical displacement is matched with the predicted output from a pre-generated centrifugal pump model table according to the output range of the predicted output; determining the target lift of the target centrifugal pump according to the frequency of the target centrifugal pump and the predicted output so as to select a pump impeller matched with the target lift; a target submersible motor is screened out; calculating the average diameter of the unit and the length of the whole unit; the full-angle change rate of the current oil well is determined according to the unit average diameter, the whole unit length, the sleeve inner diameter of the current oil well and the unit deformation rate; and under the condition that the full-angle change rate is larger than the angles of all the position points in the well deviation data obtained through pre-measurement, it is determined that a unit scheme for exploitation of the current oil well is confirmed, and the unit scheme comprises a target centrifugal pump, a target submersible motor, a separator, a protector and a protection tool.

This invention provides a fluoropolymer-based resin composition and its applications, more specifically relating to a fluoropolymer-based resin composition, a resin film, a metal-coated foil, and a printed circuit board. The fluoropolymer-based resin composition comprises the following components in parts by weight: 30-60 parts of fluoropolymer, 31-67 parts of chemically produced spherical silica with an average particle size ≥4 μm, and 3-9 parts of quartz short fibers with an average diameter ≥4 μm; the chemically produced spherical silica is obtained by organosilicon hydrolysis followed by calcination at a temperature above 800°C; the quartz short fibers have an aspect ratio ≥5:1 and a length ≤100 μm. This invention, through the design of the specific composition of the fluoropolymer-based resin composition, has prepared a high-performance fluoropolymer-based resin composition, ultimately resulting in a PTFE metal-coated foil with a dielectric loss of less than 0.05% and a controllable dimensional expansion / contraction value within 1000 ppm, without supporting material.

The application discloses a high-strength high-conductivity heat-resistant high-elongation low-cost aluminum-rare earth alloy conductor material with a core-shell structure and a preparation method thereof, and belongs to the technical field of non-ferrous metal material processing, and aims to solve the technical problems that the strength, conductivity and elongation of the existing aluminum-rare earth alloy conductor are difficult to be considered simultaneously, and the large amount of heavy rare earth leads to high cost. The material is composed of Ce 0.15-0.20%, Er 0.08-0.12%, Yb 0.05-0.08%, Zr 0.15-0.18%, Fe 0.10-0.13% and the balance of Al, and the microstructure contains a core-shell nano precipitated phase (the core RE is greater than or equal to 90%, and the shell Zr is greater than or equal to 85%) with a rich rare earth core and a rich zirconium shell and an Al 13 Fe4 dispersed phase with an equivalent spherical average diameter of less than or equal to 50 nm. The application controls the core-shell structure through a compound process of differential two-stage homogenization, solid solution aging and annealing, the material has a tensile strength greater than or equal to 182 MPa, a conductivity greater than or equal to 61.5% IACS, an elongation greater than or equal to 22%, a 300 DEG C strength residual rate greater than or equal to 92%, the cost is reduced by 25-30% compared with similar products, and the material is suitable for the fields of power transmission and electrical equipment.

A 3D printing support material is provided. The 3D printing support material includes gel particles and a gel particle stabilizer. The gel particles have a number-average diameter D50 that is 1 μm to 500 μm and a ratio (D90 / D10) of D90 with respect to D10 is 7 or lower in the particle size distribution. The number-average diameter D50, D90 and D10 are particle sizes corresponding to a cumulative number of 50%, 90% and 10%, respectively, in a number-based particle size distribution.

The present invention addresses the problem of providing a metal material capable of forming a conductive bonding material having high bonding strength, a composition, a conductive bonding material, a device, and a method for producing a conductive bonding material. This metal material has a core material and protrusions present on at least a portion of the surface of the core material, and is characterized in that the metal material includes a metal wire portion having a minimum added average diameter of 300 nm to 650 [mu] m in the sphere, and in that the protrusions are metal wire portions having an added average diameter of 10 to 200 nm and an added average length of 0.3 to 300 [mu] m. The metal material has five or more metal wire parts on each core material.

A thermoplastic resin composition for an electromagnetic wave absorber includes a thermoplastic resin (A), a carbon nanotube (B) with an average diameter of 1 to 15 nm, and a carbon black (C) with an average primary particle size of 20 to 50 nm, and satisfies any of (i) to (iv). ΔRL expressed by Equation (1) is 3 dB or less, and ΔTL expressed by Equation (2) is 5 dB or less.