69 results about "Particle radius" patented technology

Conductive particles each includes a polymer base particle and a conductive layer coating the polymer base particle. Let the compressive elastic deformation characteristic K_X of one conductive particle when the displacement of particle diameter of the conductive particles is X % be defined by the following formula: K_X=(3/√2)·(S_X^−3/2)·(R^−1/2)·F_X. F_X is the load (N) necessary for X % displacement of the conductive particles. S_X is the compressive deformation amount (mm) upon X % displacement of the conductive particles. R is the particle radius (mm) of the conductive particles. The compressive elastic deformation characteristic K₅₀ when the displacement of particle diameter of the conductive particles is 50% is 100 to 50000 N/mm² at 20° C., and the recovery factor of particle diameter of the conductive particles when the displacement of particle diameter of the conductive particles is 50% is not less than 30% at 20° C.

The invention discloses a cathode material LiMn1-xFexPO4 for a lithium ion cell and a preparation method of the cathode material LiMn1-xFexPO4. The preparation method comprises the following steps: manganese source compounds and iron source compounds are adopted as the raw materials to prepare manganese-rich solution and a manganese-poor solution respectively, a FeMnPO4 precursor with a gradient structure is synthesized through a coprecipitation method by controlling the sample adding speed, and then lithium doping and high-temperature calcination are performed to prepare the LiMn1-xFexPO4 with a gradient structure, that is the manganese content of the LiMn1-xFexPO4 is gradually reduced while the iron content of the LiMn1-xFexPO4 is gradually increased from inside to outside along the particle radius of the LiMn1-xFexPO4. The anode material LiMn1-xFexPO4 with the gradient structure has the characteristics of high energy density, good cycle performance and excellent rate capability and is applied to the field of application of power lithium-ion batteries.

[Object] Provided is a means capable of suppressing a decrease in capacity and improving output characteristics of a non-aqueous electrolyte secondary battery when the battery is used for a long period of time.

[Solving Means] Disclosed is a positive electrode active substance for a non-aqueous electrolyte secondary battery, in which the true density/tap density of secondary particles of a lithium composite oxide containing nickel as the main component is within the range of 1.6 to 2.3, and in the secondary particles, the average porosity on the center side of the half (R/2 [μm]) of the particle radius (R) of D50 of the secondary particles is larger than the average porosity on the surface side.

The invention consists of two parts: the transmitting end and the receiving end. The transmitting end is composed of the beam limiting unit, the spatial filter, the transmission-reflector and semiconductor laser arranged in sequence encapsulated in the column shape barrel. The reference light receiver is fixed on the side wall of the column shaped barrel. The receiving end is composed of the convex lens, the metal frame, the diaphragm, the two-dimension adjusting unit, the photoelectric receiver and the packaging body. The preliminary signal multiplication circuit is encapsulated inside the packaging body. The invention can measure multiple parameters of the granules with less limitation for the object to be measured and little disturbing to the flow field.

The invention provides a particle diameter detection method based on optical trapping. The method comprises the following steps of analyzing the power spectrum of displacement of particles trapped by an optical trap, wherein a signal comprises Lorentz distribution corresponding to limited Brownian movement and peak of forced movement; according to the area of the peak relative to the Lorentz distribution and the height of the peak, inverting the voltage proportion coefficient of a micro particle in the optical trap when the micro particle is detected by a detector, and according to the micro particle diameter with the standard size, measuring the ratio of coefficient of viscosity to temperature; acquiring the temperature in the optical trap according to the relationship between the coefficient of viscosity and the temperature; collecting a forced movement signal of a to-be-detected micro particle in the optical trap, and then calibrating the voltage proportion coefficient of the detector to the micro particle by utilizing the power spectrum; and acquiring the diffusion coefficient by the power spectrum of thermal noise, and determining the particle radius according to the temperature, the coefficient of viscosity as well as Stokes-Einstein relation of standard micro particle measurement. The method can be used for detecting the particle diameter of each particle in an experiment environment, that is, the method can be used for detecting the particle diameter with high precision in situ.

The method discloses a method for predicting the start-up pressure gradient of Robertson-Steve fluid in a porous medium. The method comprises the following steps: a, providing a sample of the porous medium, and measuring the porosity (phi) and the particle radius (R) of the porous medium; b, calculating structure parameters of the porous medium in a fractal model according to the porosity (phi) and the particle radius (R) of the porous medium; c, measuring characteristic parameters of the Robertson-Steve fluid, wherein the characteristic parameters include a dynamic viscosity coefficient (mu), an initial shear rate (C), a rheological index (n), surface tension (T) and a solid-liquid contact angle (theta); and d, according to the structure parameters of the porous medium and the characteristic parameters of the Robertson-Steve fluid, calculating the start-up pressure gradient (Lambda) of the Robertson-Steve fluid. The method for predicting the start-up pressure gradient of the Robertson-Steve fluid in the porous medium can reflect the specific rule of the start-up pressure gradient of the Robertson-Steve fluid in the porous medium.

The invention relates to an emulsion polymer comprising at least one (meth)acrylate segment that comprises between 1 and 30 % by weight of units derived from (meth)acrylates with at least one double bond and between 8 and 40 carbon atoms in the alkyl group, between 1 and 10 % by weight of units derived from monomers containing acid groups and between 50 and 98.9 % by weight of units derived from (meth)acrylates with between 1 and 6 carbon atoms in the alkyl group, each weight percentage relating to the weight of the (meth)acrylate segment. According to the invention, the emulsion polymer has a particle radius of at least 50 nm.

The invention discloses a constructing method for a kind of water-tight channel seam: the invention preforms a seam with width of 3.0cm-8.0cm when lays concrete preformed block or pouring concrete in field, the depth of the sea is not less than 5.0cm, the invention lays a layer of sands (particle radius 0.1-1.0 cm) on the bottom of the seam, then the concrete sand pulp is poured into the seam and flat with the concrete block with pulp pouring machine or manually, sprays M1500 water repellent compound on the surface of seam and in range of 3.0-5.0 at two sides of the seam.

The invention is nickel oxide nano electrochromism film and the manufacturing method, the method uses liquid-gelatum method to produce nickel colloidal sols, them the ITO glass piece is immersed into the liquid, and uses the film device to pull into film, the film can be get through drying, baking, quenching and cooling. The manufacturing method of colloidal sols uses inorganic nickel salt to dissolve in the compound organic solvent which uses waterless alcohol mainly, and they are back flowed every 78-82deg.C, then, adds in water and the organic acid to get the nickel colloidal sols. The invention is simple, the film is even, thick, the even particle radius is between 30-50mm, the light throughput varies in 7.9%-85%. The property of the product is stable.

The invention relates to the battery manganese water processing technology, with dark brown appearance, BET specific surface area being 315. 543 m2/g, particle radius 20-40 , by screening active alumina granules with particle radius being 20-40 , cleaning with ion removal water for two to three times, and drying it for further usage, getting the above processed alumina granules for 6-10g, adding them to 50ml ion removal water for twisting, adding 0. 015-0. 020mol (CH3COO)2Mn.4H2O, twisting for 20min, then adding KMnO4 solution 100-250mL with density of 0. 045-0. 085mol/L, seeing the solution turned into dark brown and generated into MnO2, abandoning the suspended solution, leaving the particle compound absorbent ion till the pure solution coming ut, drying it to get the absorbent.

The invention relates to the technical field of cutting tools, in particular to a preparation process of self-lubricating ceramic material cutting tools, which is characterized in that the process steps are: (1) Nano-thulium zirconium ceramic powder prepared by hydrothermal precipitation method, its composition The content and mass percentage are: 7% to 38% of thulium oxide, 62% to 93% of zirconia, (2) after adding TiC composite, ball milling, (3) adding solid lubricant, the radius of the solid lubricant particle ceramic composite material The ratio is 0.225≤r/R≤0.419, (4) mixed after ball milling, (5) vacuum dried, (6) put into graphite mold, (7) prepared by hot pressing sintering process, and the sintering temperature is 1500°C-1700°C , holding time 40 minutes. Compared with the prior art, the present invention has a simple technological process, and the self-lubricating ceramic tool has the functions of anti-friction, anti-wear and lubrication, saves the cooling and lubrication system, reduces equipment investment, avoids environmental pollution caused by cutting fluid, and realizes clean production. reduce manufacturing cost.

The invention relates to a method for machining a double-metal band saw blade. The method includes the steps that a high-speed steel particle is preset on each weld face arc of a band saw blade body, and the relation between the weld face arc radius R1 and the high-speed steel particle radius R2 is that R2<=R1<=R2+0.5. According to the method for machining the double-metal band saw blade, waste of high-speed steel material in the saw tooth forming process of traditional double metal is avoided, arc lines are adopted for weld faces in use, the length of weld seams is larger than that of a traditional double metal saw blade, and the weld face arcs and the high-speed steel particles are arranged in space positions, so that the saw blade body can generate a base support effect, saw tooth cutting force is transmitted to the saw blade body more easily, and the saw blade bears larger cutting force. The diameter of the weld face arcs is larger than that of the high-speed particles, and when compressive deformation is generated, the bonding of the weld faces is more reliable.

The invention discloses a novel rolling type sand sieving machine. The novel rolling type sand sieving machine comprises a rolling type sand sieving machine body, an external rolling sand filtering net and a coarse material outlet, wherein a fixing table is arranged on the rolling type sand sieving machine body; the external rolling sand filtering net is rotatably arranged between two support frames; a gear ring is arranged on the exterior of one end of the external rolling sand filtering net in a sleeving manner; the bottom of the gear ring is in transmission connection with a driving motor fixedly connected to the fixing table through a small gear; and the other end of the external rolling sand filtering net is located on the fixing table and is provided with the coarse material outlet convenient for discharging. The external rolling sand filtering net is arranged on the sand sieving machine; an internal rolling sand filtering net is rotatably arranged inside the external rolling sand filtering net in a sleeving manner and can be rotated by loosening a spiral fastening clamp; the radius of produced sand can be adjusted through the mutual rotation between the internal rolling sandfiltering net and the external rolling sand filtering net; and due to the structure, the novel rolling type sand sieving machine can achieve the purpose of sieving sand with different particle radiuses , and is simple in structure and has strong practicability.

The invention discloses a method for constructing a variable-porosity porous medium. The method comprises the following steps: randomly distributing a plurality of spherical particles in an area; determining the target porosity of the porous medium target model, determining the increase length of the particle radius each time, keeping the coordinates of the sphere center of the particles fixed, keeping all the particles in the calendar area, and on the basis of the original particle radius, increasing the radius of each particle by the same length until the target porosity is reached, and outputting the porous medium target model. The method also includes sorting the plurality of target porosities from high to low, and constructing a next target model on the basis of the previous target model. The construction process of the method is controllable, the channel characteristics of the porous media with different porosities are associated, the construction process can be closer to the actual situation through specific parameter reflection, and the research on the porous media problem is facilitated.

The invention discloses a quick calculation method of ground surface solar radiation flux and solves the problem of low ground surface solar radiation flux calculation efficiency. The quick calculation method includes following steps: utilizing an atmospheric radiation transmission model to simulate ground surface solar radiation flux corresponding to satellite data under different numerical values, and building a ground surface solar radiation flux database to acquire a ground surface solar radiation flux lookup table; downloading the satellite data which include solar zenith angle, cloud optical thickness, cloud effective particle radius, aerosol optical thickness, aerosol type and gray value; acquiring the ground surface solar radiation flux according to the lookup table. By the quick calculation method, a lot of repeated and redundant calculation work is avoided, and calculation efficiency and calculation accuracy are improved greatly.