209 results about "Average diameter" patented technology

A method to achieve a yield ratio of 0.60 or more in a component from non-heat-treated steel having bainitic microstructure. The component includes a predetermined chemical composition, in mass %, in amounts such that a value of F1 obtained by Formula (1) is 0.65% or more, with the balance as Fe and inevitable impurity. Bainitic microstructure area fraction is 85% or more and Retained austenite area fraction is 5% or less. Crystal grains of the bainitic microstructure have an average diameter of 10 μm or more and 25 μm or less, an average aspect ratio of 0.5 or more, and an average ratio of crystal grain boundary length to crystal grain circumference of 60 or less.F⁢1=C+Si / 24+Mn / 6+Ni / 40+Cr / 5+Mo / 4+V / 14(1)

The invention relates to the technical field of batteries, in particular to a diaphragm and a battery comprising the diaphragm. The diaphragm comprises a base material and a ceramic layer located on the surface of one side or two sides of the base material, the ceramic layer comprises inorganic particles and a first polymer, the ceramic layer is of a porous structure, the porous structure comprises holes with the diameter larger than or equal to 0.5 micrometer, and the diameter of each hole is larger than or equal to 0.5 micrometer within the range of 100 micrometers * 100 micrometers randomly selected on the surface of the ceramic layer. The number of pores having a diameter > = 0.5 [mu] m is from 10 to 800 and the number of the first polymer is from 10 to 500; the diaphragm meets the following relational expression: 1 < D1 / D2 < 20, D1 is the average diameter of pores with the diameter greater than or equal to 0.5 [mu] m in the ceramic layer, and the unit is [mu] m; d2 is the average particle size of the inorganic particles, and the unit is [mu] m. Comprising the diaphragm disclosed by the invention can have relatively high long cycle performance and fast charge performance under the condition of not influencing self-discharge and safety performance.

The invention provides a method for improving the anti-cracking performance of a special recombined material for independent liquid cargo tanks of LNG, LPG and LEG ships. The method comprises the steps that wood is rotationally cut into single plates with the thickness being 1.8-3.0 mm; the veneer is subjected to heat-moisture treatment, first drying, gum dipping and second drying; the second drying means that the moisture content of the impregnated veneer reaches 5-8%; after reinforcing materials are dispersed on the upper surfaces of the impregnated veneers, assembling, hot pressing and balancing are conducted; the reinforcing material is located between the adjacent impregnated veneers, and the reinforcing material comprises a fiber material with the average diameter of 5-8 microns and / or nano particles with the average particle size of 10-50 nm. By means of the method, the cracking rate of the interior or the glue layer of the special recombined material veneer can be effectively reduced.

The invention relates to a hollow silicon dioxide microsphere and a preparation method and application thereof, the hollow silicon dioxide microsphere has a dielectric constant less than or equal to 2.5, a dielectric loss tangent angle less than or equal to 0.001, a purity greater than 95%, a sphericity rate greater than or equal to 99%, a wall thickness greater than 0 and less than or equal to 0.42 [mu] m, and an average diameter of 0.1 [mu] m-5 [mu] m, and the hollow rate, the wall thickness and the average particle size satisfy a relational expression, eta is the hollow rate, t is the wall thickness, and R is 1 / 2 of the average particle size. The hollow silicon dioxide microspheres provided by the invention are high in spherical rate, firm in wall thickness, uniform in particle size distribution, high in purity, relatively excellent in dielectric property and extremely low in content of metal impurities, and can meet the application requirements of high-speed and high-frequency substrates, in addition, the preparation method provided by the invention is few in adopted raw materials, simple in preparation process, low in cost and high in efficiency.

The invention provides a fiber-reinforced silicon dioxide aerogel composite material, which is characterized in that a fiber felt formed by two kinds of glass fibers is used as a reinforcing material, one kind is hollow short fibers with the average diameter of 5.0-25 microns and the length of 0.5-2.0 mm, the other kind is superfine fibers with the average diameter of 0.6-5.0 microns and the length of 0.5-3.0 mm, and the difference between the average diameters of the two kinds of fibers is at least 3 microns. The fiber reinforced composite material provided by the invention has very strong mechanical properties and very low heat conductivity coefficient, and can exert excellent thermal insulation efficiency as a building thermal insulation material.

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.

A titanium material according to one aspect of the present invention contains 0.100-0.300% by mass of C, and contains compound particles containing titanium and carbon and having an average diameter of 400 nm or less. In a titanium material according to one aspect of the present invention, it is preferable that an A value, which is an index value for the ratio of TiC to Ti2C in compound particles containing titanium and carbon, is 0.10 or more. The titanium material according to one aspect of the present invention preferably contains Ti3C2. Another aspect of the present invention relates to a chemical device component comprising the titanium material according to the present embodiment. Another aspect of the present invention relates to a chemical device comprising the chemical device component of the present embodiment.

A three-dimensional product formed by additive manufacturing, the three-dimensional product includes a plurality of continuous filaments arranged in a geometric pattern, where the plurality of continuous filaments includes a radiation-cured component and a nonradiation-cured component. A concentration of the nonradiation-cured component is in a range of greater than 5 wt % to less than 95 wt % of total weight of the three-dimensional product. The three-dimensional product includes a plurality of non-random pores located between adjacent printed continuous filaments, where an average diameter of the non-random pores is in a range of greater than 0 microns to less than 50 microns.

The invention discloses a hollow silicon dioxide particle. The ratio of the hollow area of the hollow silicon dioxide particle to the total area of the particle in a transmission electron microscope photo is 10-96%; the average maximum diameter of the hollow silica particles is 100 nm to 10 [mu] m; a shell layer of the hollow silicon dioxide particle is formed by stacking nano particles, the average diameter of nano convex particles in the shell layer is 4-100 nm, and the ratio of the average diameter of the nano convex particles to the average maximum diameter of the hollow silicon dioxide particle is 1 / 2500-1 / 5. The ratio of the average diameter of the nanometer protruding particles on the surfaces of the hollow silicon dioxide particles to the average maximum diameter of the hollow silicon dioxide particles ranges from 1 / 2500 to 1 / 5, so that the bonding force between the hollow silicon dioxide particles serving as filler and resin is high, the fluidity is good when the hollow silicon dioxide particles are added into the resin, and the hollow silicon dioxide particles are suitable for serving as packaging filler of semiconductor devices.

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.

A fixing member includes a slide layer having a cylindrical shape and a thickness of 8 micrometers (μm) or more and 20 μm or less, a base layer formed on an outer side of the slide layer, and a surface layer formed on an outer side of the base layer. The slide layer has Benard convection cell structure having an average diameter of 50 μm or more and 200 μm or less on a surface that is not in contact with the base layer, and the slide layer includes an additive having a median particle diameter D50 of 4.5 μm or less and an aspect ratio of 30 or more and less than 50.

The present invention addresses the problem of providing a resin-attached fiber base material which suppresses falling of a fiber fragment (a part of synthetic fiber) from a fiber base material and is excellent in texture, and to provide a falling-off suppression method.　A resin-attached fiber base material according to the present invention comprises: a fiber base material having a spun yarn formed including synthetic fibers; and a dot-like resin part provided on at least one surface of the fiber base material. The average twist number T of the spun yarn is in the range of 0.10-3.00 turns / mm, the average diameter D of the resin part is in the range of 0.05-5.00 mm, the average number P per inch of the resin part is in the range of 5.0-50.0 pieces / 25.4 mm, and the average diameter D and the average number P of the resin part are provided on the fiber base material so as to satisfy formula (1) below. Formula (1): 8.6 ≤ [D / 25.4 / (P-1) } ] × P / T ≤ 61.2

The invention discloses a method for detecting the conveying condition of a silicon steel inhibitor in a pipeline, and the method comprises the steps: obtaining the fluid density, fluid viscosity and fluid transverse average flow velocity of the inhibitor in a target pipeline, and measuring the speed of particles in the fluid and the average diameter of the measured particles; wherein the particle velocity comprises a particle transverse velocity and a particle longitudinal velocity; calculating a blockage index based on a blockage index calculation formula; meanwhile, the precipitation degree of the inhibitor in the target pipeline is obtained, and trend comparison is conducted on the precipitation degree and the blockage index; if the trends are inconsistent, adjusting a correction coefficient in a blockage index calculation formula until the trends are consistent, and forming a corresponding table of the blockage index, the precipitation degree and the transverse average flow velocity of the fluid; determining an actual blockage index based on the corresponding table and the actual fluid transverse average flow velocity; and performing early warning on the precipitation condition of the inhibitor in the target pipeline by using the actual blockage index. According to the method, the precipitation degree of the inhibitor in the pipeline is represented through the blockage index, and early warning is performed.

The invention relates to the technical field of batteries, in particular to a battery. The battery comprises a positive plate, a negative plate, electrolyte and a diaphragm located between the positive plate and the negative plate, the diaphragm comprises a base material and a ceramic layer located on the surface of one side or two sides of the base material, the ceramic layer comprises inorganic particles, the ceramic layer is of a porous structure, the porous structure comprises holes with the diameter larger than or equal to 0.5 micrometer, and the coverage rate of the holes with the diameter larger than or equal to 0.5 micrometer in the surface of the ceramic layer is 10%-50%; the negative plate comprises a negative current collector and a negative active material layer coated on the surface of one side or two sides of the negative current collector, the negative active material layer comprises a negative active material, the negative active material comprises a silicon material, and the average particle size D1 of the silicon material is 1-10 [mu] m; the battery satisfies the following relational expression: 0.5 < = D1 / D2 < = 5, and D2 is the average diameter of holes of the ceramic layer, the diameter of which is greater than or equal to 0.5 [mu] m, and the unit is [mu] m. The battery disclosed by the invention has the advantages of low expansion rate, high rate capability and good quick charge cycle performance.

A polyethylene diaphragm and a preparation method thereof belong to the technical field of diaphragms. A test sample with the size of 1m * 1m is taken from the middle position along the transverse direction of the polyethylene diaphragm; respectively testing a group of first SEM pictures with magnification times of 1 thousand times and a group of second SEM pictures with magnification times of 5 thousand times at four corner positions of the test sample by using a scanning electron microscope, counting the number of crude fibers with the diameter not less than 500nm in the fibers extending along the longitudinal direction in the first SEM pictures, and counting the average diameter of the fibers extending along the longitudinal direction in the second SEM pictures. In the four first SEM pictures, the number of crude fibers in at least three first SEM pictures is not less than 15. The average diameter is not less than 200nm. The polyethylene diaphragm is provided with the coarse fibers which are proper in number and diameter and extend in the longitudinal direction, so that the polyethylene diaphragm has certain friction performance in the transverse direction, and the polyethylene diaphragm is not prone to slipping, dislocation and wrinkling in the transverse direction during rolling.

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.

Disclosed in the present invention is an ultrahigh-strength cold-rolled steel strip having a tensile strength of 1450 MPa or above, comprising Fe and inevitable impurity elements, and further comprising the following chemical elements in percentage by mass: 0.19-0.245% of C, 0.03-0.45% of Si, 0.8-1.2% of Mn, 0.001-0.004% of B, 0.05-0.15% of Cu, 0.05-0.15% of Zr, 0.005-0.05% of Ti, and 0.01-0.08% of Al. The microstructure of said ultrahigh-strength cold-rolled steel strip comprises a matrix and carbide particles uniformly dispersed in the matrix, wherein the matrix has tempered martensite the volume fraction of which is 95% or above, and the average diameter of the carbide particles does not exceed 0.5 microns. In addition, further disclosed in the present invention is a manufacturing method for said ultrahigh-strength cold-rolled steel strip, comprising the following steps of: (1) smelting and casting, (2) hot rolling, (3) cold rolling after acid pickling, (4) continuous annealing, (5) tempering, and (6) leveling.

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.

Composite material comprising a fluoropolymer matrix and a filler formed of nanoparticles of a ceramic of the BZT-αBXT type wherein X is selected from Ca, Sn e Mn and α is a molar fraction selected in the range between 0.10-0.90 doped with at least one doping element selected from the group consisting of Nb, La, Mn, Nd and W, provided that when X is Mn, the doping element is not Mn, wherein said nanoparticles have an average diameter comprised between 100 and 200 nm and wherein the filler is present in an amount comprised between 10 and 25% by weight on the total weight of the composite. The composite material is used to form a thin film usable as a piezoelectric material in electronic components, for example acoustic sensors such as microphones, and energy harvesting transducers.

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 um and equal to or smaller than 5.5 µm.

DEVICE FOR CLOSING A CONVEYOR BELT, CONVEYOR BELT AND METHOD FOR CLOSING A CONVEYOR BELT A device for closing a conveyor belt (1) comprises first and second ends (1a, 1b) defining first and second series of holes (5a, 5b). The first and second series of holes (5a, 5b) of the two ends (1a, 1b) respectively come into line with each other to close the conveyor belt (1). A first rod (6) passes through the holes of the first series of holes (5a). A second rod (7) passes through the holes of the second series of holes (5b). A separation distance between a central axis of the first rod (6) and a central axis of the second rod (7) is less than four times the average diameter of the first rod (6) and the second rod (7).

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.

Provided is a resin composition which can maintain transparency as a film while exhibiting a good elastic modulus (specifically an average elastic modulus in the machine direction and transverse direction of 6.0 GPa or more). The resin composition contains a resin component and a fibrous alumina filler, and is characterized in that the resin component contains at least a resin having an amide structure, and the fibrous alumina filler includes a fibrous alumina filler which is dispersed in the resin composition at an average diameter of 4 nm to 30 nm and an average fiber length of 200 nm to 4000 nm.

The invention discloses a mold repair method for preparing a plastic product with a circular axis feature. The method takes the center of the circular axis actually measured as the coordinate origin, takes the coordinate origin as the center, and takes the average diameter of a reference circle marked in a product drawing as the diameter to obtain a corrected cylindrical surface, and obtains a corrected deviation value of each actual measured point relative to the corrected cylindrical surface. Finally, according to the corrected deviation value, the part corresponding to the actual measured point on the mold after the trial mold is corrected. The requirement can be met through one mold repair, which not only solves the mold repair problem that has troubled technical personnel in this field for many years, but also greatly improves the efficiency of mold repair and reduces the cost of mold repair.

An inductor includes a body containing soft magnetic powder and resin, a coil embedded in the body, outer electrodes on the body, and a protective film on the surface of the body. The protective film has a thickness of 10 μm or more and contains silica particles and resin. In the protective film, the silica particles have an average diameter of 15 nm to 75 nm, and the percentage by weight of the silica particles to the resin is between 150% and 250%.

The embodiment of the invention relates to a composite material, a production process and an electronic component comprising the composite material. The composite material comprises a fluoropolymer matrix and a filler formed from nanoparticles of a ceramic of the BZT-[alpha] BXT type, where X is selected from Ca, Sn and Mn, and [alpha] is a molar fraction in the range of between 0.10 and 0.90, the nanoparticles being doped with at least one doping element selected from the group consisting of Nb, La, Mn, Nd and W, where when X is Mn, the doping element is not Mn, and when X is Y, the doping element is not Nd. Wherein the nanoparticles have an average diameter comprised between 10% and 25% by weight of the total weight of the composite. The composite material is used to form a film that can be used as a piezoelectric material with inductive properties in electronic components such as acoustic sensors such as microphones, and energy harvesting transducers.

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

To provide a technology capable of enhancing heat conductivity of the whole adhesive member while maintaining flexibility, in the adhesive member.SOLUTION: A holding member comprises a first member, a second member, and an adhesive member for bonding the first and second members together. The adhesive member contains a filler. The filler contains a spherical filler and an amorphous filler. An average diameter of the spherical filler is smaller than a maximum value of a minor axis of the amorphous filler.SELECTED DRAWING: Figure 1

A nonwoven abrasive article comprises a lofty open nonwoven fiber web comprising entangled fibers. The fibers have an average diameter, and the fiber web has first and second opposed major surfaces and a porous interior therebetween. An abrasive material is predominantly disposed within the porous interior. The abrasive material comprises abrasive particles at least partially retained in a binder. The abrasive material comprises elongated blobs. Each elongated blob is respectively bonded to at least one of the fibers. The elongated blobs have a minimum width of at least two times the average diameter of the fibers, wherein a majority of the elongated blobs are longitudinally aligned within 40 degrees. The abrasive particles are magnetizable, the elongated blobs further comprise magnetizable particles different from the abrasive particles, or both. Methods of making the nonwoven abrasive article are also disclosed.

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.