13results about How to "Good structural consistency" patented technology

The invention belongs to the technical field of ceramic heat accumulators, and relates to an RT0 combined honeycomb ceramic heat accumulator and a production process thereof. Comprising the following steps: mixing aluminum oxide powder, diatomite, expanded perlite, rare earth oxide, carbon nanofibers, kaolin, quartz sand, titanium dioxide, boron nitride powder, silicon carbide powder, zirconium oxide powder, aluminum oxide fibers, glass powder, yttrium-stabilized zirconium oxide, aluminum oxide hollow spheres and aluminum borate whiskers; drying the mixed material, finely grinding the dried material by using a ball mill, and screening by using a screen; the sieved mixture is put into mixing equipment, 2% of plasticizer and 1% of preservative are added for mixing, and mixed pug is obtained; and standing the mixed pug to obtain a blank. The service life of the heat accumulator is prolonged, and the heat exchange efficiency of the heat accumulator is improved.

The invention discloses a partition-optimized 0.1-0.4mm ultra-thin VC and a preparation method thereof, comprising an upper cover plate and a lower cover plate, wherein the upper cover plate is welded to the lower cover plate; the upper cover plate and the lower cover plate both comprise an evaporation section, an insulation section and a condensation section; the surface of the evaporation section of the upper cover plate is set as a super-hydrophilic cavity-shaped micro-nano structure, the surface of the insulation section is set as a super-hydrophilic equal-width groove micro-nano structure, and the surface of the condensation section is set as a super-hydrophobic conical micro-nano structure; the surface of the evaporation section region of the lower cover plate is set as a super-hydrophilic conical micro-nano structure, the surface of the insulation section region is set as a super-hydrophilic cactus-like wedge-shaped groove micro-nano structure, and the surface of the condensation section region is set as a super-hydrophilic conical micro-nano structure; the application also discloses a preparation method of the ultra-thin VC. The invention can not only optimize the vapor cavity structure and liquid cavity structure and volume distribution inside the heat pipe, but also ensure its good capillary water absorption performance and low water resistance and thermal resistance.

The CSHS reaction device comprises a liquid phase conveying system, a reaction system, a temperature control system and a sample collection system, the liquid phase conveying system consists of three same high-pressure conveying pumps for liquid chromatography, corresponding liquid phase pipelines and adapters; the reaction system consists of two sets of electric heating devices, corresponding liquid phase pipelines and adapters; the temperature control system controls the two sets of electric heating devices to enable the electric heating devices to be subjected to programmed temperature rise and stabilize the temperature to be 400 DEG C or above; and the sample collection system consists of a water cooling device, a filter and a back pressure valve. The CSHS reaction device is applied to preparation of a semiconductor H2S sensing material, is good in structural consistency and excellent in sensing performance, and can meet application requirements.

The present application relates to the technical field of mine sensor, in particular to a mine wind speed and non-contact sensing bionic flexible sensor and a preparation method thereof, which mainly solves the technical problems of existing wind speed measuring sensor, such as serious mechanical wear, high starting wind speed, limited measuring accuracy, and low integration degree of independent layout and integration with proximity detection sensor. The sensor comprises an upper electrode layer, a dielectric layer and a lower electrode layer fixedly connected in sequence from top to bottom. The upper electrode layer comprises a first substrate and flexible cilia arranged on the top surface of the first substrate. The top surface of the first substrate and the flexible cilia are collectively covered with a first conductive film. The upper electrode layer serves as a resistance test layer to measure wind speed and as a voltage test layer to realize non-contact proximity detection. The lower electrode layer comprises a second substrate and a second conductive film, which serves as an excitation electrode layer to generate an excitation electric field. The present application also provides a preparation method of the sensor. The present application integrates dual functions in a single sensor, has high integration degree, no mechanical wear and low starting wind speed.

This invention discloses a method for manufacturing a trench gate semiconductor power device, comprising: forming a first hard mask layer on a first epitaxial layer; patterning and etching the first hard mask layer to open the formation region of the gate trench; etching the first epitaxial layer to form the gate trench; removing the first hard mask layer and then performing a first thermal oxidation process to form a first field oxide layer on the inner surface and outer surface of the gate trench; performing a first CVD growth process to form a second field oxide layer, and stacking the first and second field oxide layers to form a third field oxide layer; performing a first CMP process to remove the third field oxide layer outside the gate trench; forming a first polysilicon layer to completely fill the gate trench and extend it outside the gate trench; and performing a second CMP process to planarize the first polysilicon layer. This invention can simultaneously improve the structural consistency of the gate trench region and the plateau region, and can comprehensively improve the device performance and yield.

The invention discloses a partially zwitterionic polyion liquid material, a humidity sensor with a full humidity sensing characteristic and a preparation method of the humidity sensor, and belongs to the technical field of humidity sensors. A polyion liquid material is prepared by adopting an alkene-sulfydryl click chemical reaction under ultraviolet light excitation, and a zwitterionic polymer chain is formed by grafting a sulfonic acid group on a branched chain of the polyion liquid. The humidity sensor is composed of a ceramic substrate and a sensitive layer, wherein the surface of the ceramic substrate is provided with 2-5 pairs of graphite carbon interdigital electrodes, and the sensitive layer is dispensed on the ceramic substrate and the graphite carbon interdigital electrodes. The sensor has excellent humidity sensitive characteristics in a relative humidity range of 11-95%, including high sensitivity, high stability, small humidity hysteresis and rapid response recovery characteristics, and solves the contradiction between optimization of recovery characteristics and sensitivity of most polyion liquid-based humidity sensors. The sensitivity of the polyion liquid-based humidity sensor is improved, the response recovery time of the polyion liquid-based humidity sensor can be shortened, and the humidity hysteresis of the polyion liquid-based humidity sensor can be reduced.

The invention discloses a special-shaped slice grain pressing mold and a forming method, and aims at solving the technical problem that a special-shaped slice grain is difficult to form from the technical problems existing in the forming process of the special-shaped grain. And the mould pressing process is changed into secondary pressing from primary forming. Powder is firstly pressed for the first time until the upper end face of a punch is flush with the upper end face of a die cylinder; and then, the cushion block and the gasket are pulled out, pressurization is conducted again till the set pressure is reached, and pressure maintaining and demolding are conducted. The special-shaped slice grain pressed by the special-shaped slice grain pressing mold is complete in structure, free of cracks and even ring falling, good in physical size consistency, qualified in appearance and free of defects, the process problem of compression molding of the special-shaped slice grain can be solved, the process is safe and reliable, and the product quality is qualified.

The invention discloses a low-humidity sensor with a polyion liquid film based on a discontinuous conductive polymer template as a sensitive layer and a preparation method thereof, and belongs to the technical field of humidity sensors. The surface of the ceramic substrate is provided with a graphite carbon interdigital electrode, and the temperature sensitive layer is dispensed on the ceramic substrate and the graphite carbon interdigital electrode; wherein the temperature sensitive layer is a polyion liquid film based on a discontinuous conductive polymer template. The preparation method comprises the following steps: firstly, preparing a pre-agglomerated methanol dispersed conductive polymer material by adopting an oxidative polymerization method and a solvent exchange method, and preparing a discontinuous conductive polymer template on the surface of a substrate after drying and annealing; the polyion liquid film is prepared on a discontinuous conductive polymer template in situ through an alkene-mercapto click chemical reaction under ultraviolet excitation, and the sensor has the characteristics of high sensitivity, small wet hysteresis, high stability, low impedance value and low detection limit, and is simple in manufacturing process, small in size and suitable for industrial batch production.

The invention discloses a flexible pressure sensor of a rigidity gradient micro-cone array and a manufacturing method thereof, and belongs to the technical field of flexible sensor structure design and manufacturing. The sensor comprises an upper packaging layer, an upper electrode layer, a sensitive layer, a lower electrode layer and a lower packaging layer which are sequentially stacked from top to bottom, the upper end of the sensitive layer is electrically connected with the upper electrode layer, and the lower end of the sensitive layer is electrically connected with the lower electrode layer; the sensitive layer is of an elastomer micro-cone array structure, and at least two layers of elastomer laminated layers with different elastic moduli are constructed on a single micro-cone in the height direction, so that the micro-cone forms an axial rigidity gradient from the top to the bottom; the surface of the sensitive layer is coated with a conductive layer; the conductive layer is used for generating electrical parameter change along with the change of the contact state of the micro cone and the upper electrode layer under the action of pressure so as to realize pressure detection; the sensor can realize high-response and wide-range collaborative improvement, and is suitable for wearable, man-machine interaction, soft robot touch and other scenes.

The invention belongs to the technical field of preparation of inorganic non-metallic materials, and particularly relates to a preparation method of high-purity opaque quartz glass. The method comprises the following steps: by taking high-purity silica sol with impurity content of less than 1ppm as a raw material, compounding silica sol with various particle sizes in proportion, concentrating under reduced pressure until the content of silicon dioxide is 40-60%, adding an acrylamide gel enhancing system into the compounded sol, controlling the temperature to gelatinize the compounded sol, and preserving heat to improve the gel strength; and drying the wet gel at a low temperature of 60-80 DEG C and a relative humidity of 80-95% until the moisture content is less than 5%, then carrying out normal pressure dehydration, organic matter removal and presintering treatment on the dried gel blank, placing the presintered blank in a graphite container, and melting and preserving heat at 1400-1650 DEG C under the protection of nitrogen for 2-8 hours to obtain the non-quartz glass. And the pore size and density can be controlled by regulating and controlling the melting temperature and the heat preservation time. The total impurity content of the quartz glass prepared by the method is less than 5ppm, the structure is uniform, the density can be adjusted in a range of 1.8-2.1 g / cm < 3 >, and the quartz glass has good shading and heat-insulating properties.

The invention belongs to the technical field of new nano materials, and particularly relates to a preparation method of asymmetric polymer monomolecular layer single-hole hollow nano-particles, a product and application of the asymmetric polymer monomolecular layer single-hole hollow nano-particles. The preparation method comprises the following steps: preparing hydrophilic core / hydrophobic shell nanoparticles, soaking the hydrophilic core / hydrophobic shell nanoparticles in a selected solvent for swelling and blasting, and dispersing asymmetric single-hole nanoparticles obtained by swelling and blasting in water for standing, thereby obtaining the asymmetric polymer monomolecular layer single-hole hollow nanoparticles. According to the preparation method, the asymmetric polymer monomolecular layer single-hole hollow nano-particles with controllable opening size, uniform particle size and high yield can be prepared, so that the technical blank of the asymmetric polymer monomolecular layer single-hole hollow nano-particles in the aspect of controllable preparation is successfully filled, and the preparation process is simple, easy to regulate and control and suitable for industrial production. And the prepared product is good in structure consistency and wide in adjustable range of the size of a single hole.

This invention discloses a differential centrifugation method for separating α-Al₂O₃ nanoparticles based on morphological response differences, comprising the following steps: S1: Dispersing α-Al₂O₃ nanoparticles at a concentration of 0.55 wt% in anhydrous ethanol, and continuously dispersing the particles using an ultrasonic device; S2: Centrifuging the resulting suspension at 10,000–15,000 rpm, discarding the lower precipitate, and retaining the supernatant; S3: Dispersing the supernatant again using ultrasonication under the same conditions as in step S1; S4: Centrifuging the dispersed system at 4,000–7,000 rpm at a medium speed, and collecting the lower precipitate; S5: Repeating the combined process of steps S2–S4 2–3 times, merging all precipitates obtained in the medium-speed centrifugation stage, and obtaining the target α-Al₂O₃ nanoparticles after drying. The particles obtained by this method exhibit higher polishing rates, lower surface roughness, and lower defect density in CMP, which improves density and grain uniformity in ceramic sintering. At the same time, the method has a clear process, adjustable parameters, and strong equipment versatility, and has significant potential for industrial scale-up and engineering applications.

The invention relates to the technical field of high-nickel precursor materials, in particular to a high-nickel precursor material for a lithium ion battery and a preparation method of the high-nickel precursor material. The method comprises the following steps: (1) preparing a mixed salt solution from soluble nickel salt and soluble cobalt salt; (2) under a protective atmosphere, introducing the mixed salt solution, a doping additive, a precipitator and a complexing agent into a reaction kettle, carrying out constant-temperature co-precipitation, stopping introducing the mixed salt solution and the doping additive after a preset particle size is reached, introducing a coating additive, and carrying out a reaction to form a coating layer, so as to obtain qualified slurry; and the spherical high-nickel precursor material which can bear high pressure and is not easy to collapse and crack is obtained after post-treatment. Primary particles of the precursor can be refined through the tungsten doping agent, a looser and porous precursor can be formed by combining the tungsten doping agent with the double complexing agent, and meanwhile the precursor has better pressure resistance and cracking resistance under the combined action of the aluminum coating layer and the loose and porous interior.