39 results about "Whiskers" patented technology

The invention provides a resistance type whisker sensor, an electronic skin and a preparation method thereof, the resistance type whisker sensor comprises a substrate layer, a liquid metal-carbon nanotube sensitive material layer and a packaging layer, the liquid metal-carbon nanotube sensitive material layer is packaged between the substrate layer and the packaging layer, the liquid metal-carbon nano tube sensitive material forms a conductive network, the conductive network is composed of liquid metal particles and carbon nano tubes generated by laser ablation, and the liquid metal particles are connected through the carbon nano tubes. In the nature, many organisms realize high-precision tactile detection by virtue of tentacles, for example, beards of animals such as cats and rats can sense tiny changes of the surrounding environment and recognize the shape, texture and vibration information of objects, and the high-sensitivity tactile sensing capability plays an important role in survival and environmental adaptation of the animals. The invention provides the high-sensitivity electronic whisker, and provides the electronic skin based on the whisker sensor array.

The invention discloses a non-invasive measurement method for a cockscomb and a bearded meat. According to the method, a multi-view imaging system is used for collecting pictures of the cockscomb and the bearded meat, a key point detection model is used on a framework of YOLOv11n-pose, StarNet is adopted as a backbone to reduce the size and the calculation complexity and keep the stability of the model precision, FDPN and novel DASI are introduced into the check, self-adaptive fusion of detailed context information of all scales is achieved, and the method has the advantages of being simple in structure, convenient to operate and high in practicability. And C3k2-Star convolution is introduced in head to improve the parameter utilization rate and feature expression. And finally, dynamically adjusting the gradient by using a Wise-ShapeIoU loss function, and effectively balancing the influence of anchor frames with different masses. The method is superior to other methods from the comprehensive aspects of body size measurement precision, diversity of measurement parameters, efficiency and the like.

The invention discloses a seal beard-imitated flow field measuring device and a seal beard-imitated flow field measuring method, and belongs to the technical field of flow field detection.The seal beard-imitated flow field measuring device comprises a base, a cross beam, a piezoresistive strain gauge, a seal beard imitated part and a guide wing, four beam bodies of the cross beam are respectively provided with the piezoresistive strain gauges, the seal beard bionic part forms a cylinder extending in the axial direction, the section of the seal beard bionic part is oval, the size of the seal beard bionic part changes periodically in the axial direction, the guide wing is installed on the seal beard bionic part, and the seal beard bionic part is connected with the guide wing. The bottom end of the seal beard bionic part is installed at the center position of the cross beam in an axial rotation mode and is perpendicular to the plane where the cross beam is located. Through the innovative design of simulating seal beards, the accuracy, the reliability and the adaptability of flow velocity measurement are remarkably improved, and the flow velocity sensor has the advantages of being outstanding in performance in low-speed water flow and complex water flow environments, small in size, light in weight, easy to integrate and the like.

This utility model relates to the technical field of whisker production equipment, and provides a whisker collection device with purification function, including: a support and casters; a collection component, fixedly installed on the upper end of the support; a collection box, disposed at the bottom of the collection component; a feeding component, fixedly connected to one side of the collection component, and having a guide groove running through it; a dust removal component, fixedly disposed on both sides of the upper end of the collection component; a purification component, fixedly installed on one side of the feeding component; and a drying component, running through the back of the support. First, the device is moved to the unloading area, and all components are started. Whiskers enter the collection box through the hopper, dust is removed by a dust extraction fan, the sieve plate is screened by an anti-blocking mechanism, and the guide plate guides the whiskers to the guide plate before they fall into the material box. Simultaneously, the drying component dries the material, and some whiskers enter the purification chamber for purification. The purification liquid is recycled. This device integrates purification, screening, dust removal, and drying, comprehensively improving the quality of whiskers.

This invention provides a high thermal conductivity composite material, its preparation method, and its application. The high thermal conductivity composite material includes a mesh metal layer and an in-situ grown indium whisker layer on the surface of the mesh metal layer. This invention grows indium whiskers in-situ on the surface of the mesh metal layer. The mesh metal layer has high thermal conductivity, indium has a low melting point and good ductility, and indium whiskers are easier to adhere to heat-generating elements compared to indium grains. The in-situ grown indium whiskers on the surface of the mesh metal layer increases the contact area between the thermally conductive material and the heat-generating element, enabling the heat-generating element to effectively dissipate heat and effectively solving the heat generation problem caused by insufficient heat dissipation efficiency of the heat-generating element.

A ceramic material, a method of forming a ceramic material, and a ceramic substrate are disclosed, the ceramic material including surface-modified zirconia whiskers dispersed in an alumina matrix wherein the alumina matrix and the surface-modified zirconia whiskers are in a weight ratio of 97: 3 to 80: 20; wherein the surface of the surface-modified zirconium oxide whisker is provided with a strengthening phase microstructure, and the strengthening phase microstructure comprises strontium aluminate in a crystal phase.

The present invention belongs to the technical field of cemented carbide, specifically to a method for preparing a modified cemented carbide with high hardness, strength, and toughness. The method comprises the following steps: S1: raw material preparation; S2: grinding; and S3: sintering. The present invention fully utilizes the characteristics of various raw materials, using WC of various particle sizes and SiC whiskers of various forms for compounding, and through process optimization, significantly improving the hardness, strength, and toughness of the cemented carbide.

The invention discloses a heat-conducting organic silicon pouring sealant and a preparation method thereof, and relates to the technical field of organic silicon pouring sealants. According to the heat conduction type organic silicon pouring sealant and the preparation method thereof, aluminum oxide is subjected to modification treatment, so that the compatibility of aluminum oxide and the organic silicon pouring sealant is enhanced, aluminum oxide can be more uniformly dispersed in the sealant, and the mechanical property of the pouring sealant is effectively improved; after being added into the organic silicon pouring sealant, the organic silicon pouring sealant can further improve the mechanical property of the pouring sealant, so that the pouring sealant can better bear external force and response; the aluminum oxide has certain thermal conductivity, the dispersity of the modified aluminum oxide in the organic silicon pouring sealant is better, a more effective heat conduction path can be formed, the heat conductivity coefficient of the pouring sealant is improved, and the silicon carbide whiskers are added, so that the heat conduction path in the pouring sealant can be increased, and the silicon carbide whiskers can be matched with the modified aluminum oxide to improve the heat conductivity coefficient of the pouring sealant. The overall heat-conducting property of the pouring sealant is further improved.

The invention relates to the technical field of experimental animal culture, and discloses an immunodeficient nude mouse culture method, which comprises a genotype early-stage identification step based on the morphological characteristics of newborn suckling mouse beards, and specifically comprises the following steps: observing the beards in the mandibular and perinasal areas of a suckling mouse within 12 hours after the suckling mouse is born; if the number of the beards is less than 10, the length is less than 0.5 mm, the beards are curled and hair follicles are sparsely distributed, judging that the beards are homozygotes (nu / nu); if the number is larger than 20, the length is larger than or equal to 1.2 mm, and the seeds grow vertically and are arranged tightly, the seeds are judged to be heterozygotes (n < u / + >). According to the culture method of the immunodeficient nude mice, early-stage accurate screening and efficient culture of the homozygous nude mice can be realized through fine identification of beard forms of newborn suckling mice and milk replacement management of heterozygous breeding mice.

The invention provides a preparation method of silicon carbide whiskers. The preparation method comprises the following steps: preparing a carbon-silicon hollow sphere precursor by a spray drying method; sintering in a protective atmosphere, and removing carbon to obtain a silicon carbide whisker cluster body; and dispersing the silicon carbide whisker cluster body to obtain the silicon carbide whisker. The organic carbon layer with the residual carbon rate of 40% or above is used as the outermost layer of the silicon-carbon hollow sphere precursor and can form a continuous and compact carbon coating layer after being heated and decomposed, so that internal SiO and CO are effectively prevented from escaping when the carbon-silicon hollow sphere precursor is heated; besides, the carbonaceous structure in contact with the silicon dioxide layer is used as a carbon source and can react with silicon dioxide, so that the silicon carbide whiskers grow inwards from the outer layer of the hollow sphere, and the structure has a good promotion effect on release of reactive gas into the hollow sphere; and the preparation of the silicon carbide whisker with the specific morphology can be realized only by sintering and carbon removal.

The invention relates to the technical field of inorganic reinforced materials, and discloses a calcium fluoride whisker recovery method which comprises the following steps: S1, mixing pretreated calcium fluoride whiskers with a compound functional treatment liquid for reaction to obtain slurry; the composite functional treating fluid comprises the following raw material components: 5%-12% of a stripping agent, 0.5%-2.5% of a structure protecting agent, 0.1%-0.8% of a surfactant, 1%-3% of an oxidizing agent and the balance of water, s2, carrying out solid-liquid separation on the slurry to obtain a solid product; and S3, the solid product is washed, floated and dried, and the recycled calcium fluoride whiskers are obtained. According to the recycling method, the original structure of the calcium fluoride whiskers can be protected to the maximum extent while the high-purity calcium fluoride whiskers are recycled, the average length-diameter ratio of the recycled calcium fluoride whiskers is larger than or equal to 76, compared with the length-diameter ratio of original whiskers in raw materials, the retention rate exceeds 89%, and the purity and performance are remarkably improved.

1. The name of the designed product: gift box (dragon whiskers). 2. The use of the designed product: a packaging gift box for rush. 3. The design points of the designed product: the combination of shape, pattern and color. 4. The picture or photo that best shows the design points: perspective view. 5. The design includes color.

To provide a base material film for dicing which can reduce cutting chips and whiskers generated by cutting, and has film forming property when the film is obtained and can suppress blocking of films.SOLUTION: A base material film for dicing has an ionomer resin and a layer (A) including high density polyethylene on a surface layer or a rear layer, and has tensile elastic modulus of 100 MPa or more and 500 MPa or less, tensile breaking strength of 10 MPa or more and 30 MPa or less, and tensile breaking elongation of 200% or more and 600% or less.

The utility model provides a whisker animal bionic lamp. The whisker animal bionic lamp comprises a shell assembly and a plurality of bent whiskers detachably connected with the shell assembly. A driving device for driving the whiskers to rotate is arranged in the shell; a control device is arranged in the shell and comprises a PCB (Printed Circuit Board), and a light source is also arranged in the shell; the driving device comprises a driving motor, and a driving gear is arranged on a transmission shaft of the driving motor; a driven gear set is rotatably arranged on the shell, the driving gear is meshed with the driven gear set, and the driving motor drives each whisker to rotate independently through the driven gear set. According to the scheme, the driving device is arranged in the shell to drive the whiskers to rotate, the visual effect is good, a complex transmission structure is not needed, and the structure of a product is greatly simplified; all the control assemblies and the driving assemblies are arranged in the shell, so that the product structure is compact; meanwhile, the induction module is arranged, induction control can be achieved, control is convenient, and user experience is improved.

The invention discloses a calcium-based powder material for a polypropylene film and a preparation method of the calcium-based powder material, and belongs to the technical field of powder. According to the calcium-based powder material for the polypropylene film, alkynyl-containing POSS and azidation modified calcium carbonate whiskers are subjected to a click chemistry reaction to form a triazole ring, a three-dimensional network structure is constructed on the surfaces of the calcium carbonate whiskers, and interface transfer is inhibited; meanwhile, graded filling is formed by the POSS and the micron scale of the calcium carbonate whiskers, and meanwhile the rigidity and heat resistance of PP are improved; a triazole ring formed by click chemistry enables stress to be efficiently transmitted to the whisker and POSS network from a PP matrix; the nano dispersion of POSS fills the gaps among the whiskers, and reduces stress concentration. Meanwhile, triazole ring groups formed by azido and alkynyl are self-crosslinked under a high-temperature condition to form an olefin network or are subjected to cyclotrimerization to form an aromatic ring which has the characteristic of high-temperature char formation, a compact nano-structure protective layer is formed on the surface of the polypropylene material, and the polypropylene material has a good mass transfer and heat insulation barrier and good flame retardant property.

1. Name of the designed product: glasses (bow small cat whiskers). 2. Use of the designed product: glasses for wearing. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: perspective view.

The invention discloses a porous composite skeleton for collecting underwater bubbles and a preparation method, and belongs to the technical field of new materials, the super-hydrophobic composite skeleton is characterized in that mullite whiskers growing in situ form a skeleton support, and thermocuring silicone oil forms a muscle-like functional phase for capturing underwater bubbles; the composite skeleton shows excellent chemical, thermal and mechanical stability, and still keeps super-hydrophobic performance after being ground into powder; the hybrid skeleton realizes omnibearing underwater bubble trapping, in addition, the aperture of the hybrid skeleton is about 500nm and is more than 100 times smaller than the aperture reported in the past, and the operation depth is enlarged from several centimeters to about 60 meters.

The present invention discloses a porous composite skeleton for collecting underwater bubbles and a preparation method, belonging to the field of new material technology. The super-hydrophobic composite skeleton is composed of in-situ grown mullite whiskers forming a skeleton support and heat-cured silicone oil forming a muscle-like functional phase, and is used for underwater bubble capture. The composite skeleton exhibits excellent chemical, thermal and mechanical stability, and when ground into powder, it still maintains super-hydrophobic properties. The hybrid skeleton realizes all-round underwater bubble capture. In addition, the pore size of the hybrid skeleton is about 500nm, which is more than 100 times smaller than the pore size previously reported, expanding the operating depth from a few centimeters to about 60 meters.

The application discloses a method for preparing Si3N4 whiskers with high length-diameter ratio and high dispersity by adopting MgSiN2 sintering additives in combination with a foaming method, and adopts MgSiN2 and Si3N4 powder as main raw materials, adds a gelling agent and a foaming agent into mixed slurry to make the same into a porous foam shape, and the mixed raw materials are distributed on the foam wall, which can provide more sufficient space for the growth of the whiskers, and further improve the length-diameter ratio and dispersity of the Si3N4 whiskers.

The invention discloses a single-component inorganic cold-coating high-temperature-resistant self-cleaning coating containing nanowhiskers as well as a preparation method and application of the single-component inorganic cold-coating high-temperature-resistant self-cleaning coating. The single-component inorganic cold-coating high-temperature-resistant self-cleaning coating is prepared from the following raw materials in percentage by weight: 18 to 22 percent of SiC / Al2O3 composite whisker, 8 to 12 percent of nano TiO2, 35 to 38 percent of silica sol, 12 to 15 percent of nano ZrO2, 5 to 8 percent of apatite antibacterial agent, 2 to 3 percent of lithium-based bentonite, 1.5 to 2 percent of silane coupling agent and the balance of water. The coating disclosed by the invention solves the problems of no high temperature resistance, VOC (Volatile Organic Compounds) pollution and poor weather resistance; the limitation of high-temperature curing is broken through, and 0 DEG C cold coating is realized; meanwhile, the coating disclosed by the invention integrates 1500 DEG C high temperature resistance and cold coating characteristics, and a single-component system is more convenient for construction.

The invention relates to a method for efficiently preparing SiC whiskers at low temperature, and belongs to the technical field of material preparation. According to the method, polycrystalline silicon waste is selected as a silicon source, organic acid coating activation treatment is carried out, a renewable biomass material with a wide source is selected as a carbon source, trace nitrate is combined for catalysis assistance and reaction atmosphere regulation and control, and synthesis of the SiC crystal whiskers with controllable size, high crystallinity and uniform distribution is realized at a relatively low temperature of 1100-1300 DEG C. According to the method, the polycrystalline silicon waste is used for preparing the SiC crystal whiskers for the first time, the advantage of high reaction activity of the biomass charcoal is fully played, the gas-solid interface reaction process is enhanced, the generation and growth temperature of the SiC crystal whiskers is effectively reduced, and the reaction efficiency is improved. The whole process provided by the invention is green and environment-friendly, is simple and convenient to operate, has the characteristics of energy conservation, emission reduction and high-value utilization of solid wastes, has good industrial application potential, and is particularly suitable for the fields of green preparation of high-performance ceramic reinforced phases, functional composite materials and the like.

The invention relates to a carbon-silicon hollow sphere precursor and a preparation method and application thereof, and the preparation method comprises the following steps: growing an organic carbon layer on the outer surface of a hollow silicon dioxide sphere to obtain the carbon-silicon hollow sphere precursor. The obtained carbon-silicon hollow sphere precursor is a hollow sphere with a two-layer core-shell structure, the innermost layer is a silicon dioxide layer, and the outermost layer is an organic carbon layer with the residual carbon rate of 40% or above. The carbon-silicon hollow sphere precursor obtained by the preparation method disclosed by the invention can form a continuous and compact carbon coating layer after being heated and decomposed, so that internal SiO and CO are effectively prevented from escaping when the carbon-silicon hollow sphere precursor is heated; besides, the carbonaceous structure in contact with the silicon dioxide layer is used as a carbon source and can react with silicon dioxide, so that the silicon carbide whiskers grow inwards from the outer layer of the hollow sphere, and the structure has a good promotion effect on release of reactive gas into the hollow sphere; and the preparation of the silicon carbide whisker with the specific morphology can be realized only by sintering and carbon removal.

The invention belongs to the field of inorganic materials. The invention provides a rapid preparation method and a preparation device of SiC whiskers, and the preparation method comprises the following steps: placing a silicon-containing material and a carbon-containing material in the device, then enabling the device to be in a closed state, vacuumizing the device, then filling inert gas for pressurizing, preheating the raw materials through a Joule heating system, heating to 300-500 DEG C, stopping heating, and cooling to room temperature to obtain the SiC whiskers. A self-propagating ignition system is used for ignition, the reaction temperature is controlled to range from 1500 DEG C to 1750 DEG C, the reaction pressure is controlled to range from 0.5 MPa to 5 MPa, materials are cooled after the reaction is finished, the materials are taken out after the temperature of the device is cooled to 400 DEG C or below, the SiC whiskers are obtained, the device comprises a kettle body, a Joule heating system is arranged in the kettle body, and the device is further provided with the self-propagating ignition system. According to the preparation method and device disclosed by the invention, the reaction activity of the material is increased by utilizing a Joule heat auxiliary heating mode, the smooth proceeding of the self-propagating reaction is promoted, the reaction energy consumption is obviously reduced, the reaction time is shortened, no catalyst is used, and the rapid and large-scale preparation of the high-purity SiC whisker is realized.

The invention provides a high-temperature-resistant epoxy resin composite material as well as a preparation method and application thereof, and belongs to the technical field of composite materials. Flaky hexagonal boron nitride, boron nitride whiskers and silane coupling agent modified montmorillonite are adopted as filler, the flaky hexagonal boron nitride is of a two-dimensional flaky structure, a physical isolation layer can be formed after the flaky hexagonal boron nitride is dispersed into an epoxy resin matrix, the diffusion path of small-molecule decomposition products, oxygen and heat at high temperature is prolonged, and the thermal conductivity of the epoxy resin is improved; the boron nitride crystal whiskers have one-dimensional crystal whisker structures and can be inserted between the flaky hexagonal boron nitride lamellas and the epoxy resin matrix to play a pinning role, the lamellar structures and the matrix are firmly connected together, the lamellar structures are prevented from slipping under thermal stress, and the thermal oxidation degradation process of the epoxy resin is delayed; flaky montmorillonite in silane coupling agent modified montmorillonite has an excellent isolation effect and can fill lamellar gaps, and the three components have a synergistic effect, so that the high temperature resistance of the composite material is further improved.

The utility model relates to an efficient beard guide mesh enclosure, and relates to the technical field of electric shaver accessories, the efficient beard guide mesh enclosure comprises an inner ring and an outer ring, the inner ring is provided with a plurality of inner shaving grooves, the outer ring is provided with a plurality of outer shaving grooves, contact teeth are formed between the adjacent outer shaving grooves, and the ends, away from the inner ring, of the contact teeth extend to the outer side of the outer ring. The ends, deviating from the inner ring, of the contact teeth extend to the outer side of the outer ring, the beard inlet amount is increased to the maximum extent, the ends of the contact teeth can enter the space between lying or curled beards and the skin, then the beards are lifted up and guided into the outer shaving groove to complete shaving, and therefore the shaving efficiency is effectively improved.

The invention discloses a hafnate-based neutron absorbing material with high thermal conductivity and a preparation method and application thereof, the neutron absorbing material has a compact microscopic complex phase structure, and comprises a hafnate matrix phase, a modified whisker reinforced phase and a thermal conductive network; the hafnate matrix phase is used as a neutron absorption main body and is composed of a compound with a chemical formula of A2Hf2O7; wherein A is a rare earth element; the hafnate matrix phase has a defective fluorite structure or a pyrochlore structure; the modified whisker reinforced phase is dispersed in the hafnate matrix phase and is composed of composite whiskers with core-shell structures; the composite whisker takes a silicon carbide whisker as a core and a compact hafnium silicate layer as a shell, the modified whisker reinforced phase is dispersed at the grain boundary of the hafnate matrix phase, and at least part of the modified whiskers are in mutual contact or lap joint to form a continuous network structure; the performance of the material is remarkably improved by constructing a continuous heat conduction network, optimizing thermal expansion matching performance and blocking high-temperature interface reaction.

The present application relates to the technical field of energy storage material preparation, and particularly relates to a phonon bridging type step heat storage material, a preparation method and application, and provides a phonon bridging type step heat storage material, which comprises, from an outer layer to an inner layer, a phonon bridging network, a high-temperature layer, a medium-temperature layer and a low-temperature layer; the high-temperature layer, the medium-temperature layer and the low-temperature layer are all prepared from phase change materials, and the melting points of the phase change materials are arranged in a stepwise descending manner from the high-temperature layer to the low-temperature layer; the phonon bridging network comprises a biomimetic mineralized skeleton and a network structure of pore connection formed by boron nitride nanosheet-coated silicon carbide whiskers grown in the pores inside the biomimetic mineralized skeleton. The above-mentioned phonon bridging network serves as an outer layer low-scattering heat channel in combination with the construction of a multi-stage heat storage barrier, and solves the problems of low heat energy storage and release efficiency and poor temperature range adaptability in the prior art.

The invention relates to a preparation method of silicon carbide whiskers, which comprises the following steps: growing an organic carbon layer on the outer surface of a hollow silicon dioxide sphere to obtain a carbon-silicon hollow sphere precursor; sintering in a protective atmosphere, and removing carbon to obtain a silicon carbide cluster body; and dispersing the silicon carbide cluster body to obtain the silicon carbide whisker. The organic carbon layer is used as the outermost layer of the silicon-carbon hollow sphere precursor and can form a carbon coating layer after being heated and decomposed, so that internal SiO and CO are effectively prevented from escaping when the carbon-silicon hollow sphere precursor is heated; besides, a carbonaceous structure in contact with the silicon dioxide layer is used as a carbon source and can react with silicon dioxide, so that the silicon carbide whiskers grow inwards from the outer layer of the carbon-silicon hollow sphere precursor, and the structure has a good promotion effect on release of reactive gas into the carbon-silicon hollow sphere precursor; and the preparation of the silicon carbide whisker with the specific morphology can be realized only by sintering and carbon removal.

The application provides a positive electrode active material precursor and a preparation method and application thereof. The precursor has a chemical composition of Li a Co b Mn c (OH)2, wherein 0.1<=a<=0.5, 0<=b<=0.5, and 0.5<=c<=0.9; the positive electrode active material precursor comprises secondary particles formed by aggregation of a plurality of whiskers, the whiskers comprise a plurality of first whiskers, and the first whiskers have an aspect ratio of 1.3-4.5; wherein the first whiskers comprise crosslinked whiskers, and the crosslinked whiskers are connected with at least 5 first whiskers. The precursor provided by the application is helpful to obtain a high-manganese positive electrode active material with a stable structure, thereby improving the cycle performance of a battery.

The invention relates to a carbon-silicon hollow sphere precursor as well as a preparation method and application thereof. The carbon-silicon hollow sphere precursor is a hollow sphere with at least two layers of shell structures, the innermost layer of the at least two layers of shell structures is a silicon dioxide layer; the outermost layer of the at least two-layer shell structure is an organic carbon layer, and the residual carbon rate of the organic carbon layer is more than 40%. The organic carbon layer with the residual carbon rate of 40% or above is used as the outermost layer of the silicon-carbon hollow sphere precursor and can form a continuous and compact carbon coating layer after being heated and decomposed, so that internal SiO and CO are effectively prevented from escaping when the carbon-silicon hollow sphere precursor is heated; besides, the carbonaceous structure in contact with the silicon dioxide layer is used as a carbon source and can react with silicon dioxide, so that the silicon carbide whiskers grow inwards from the outer layer of the hollow sphere, and the structure has a good promotion effect on release of reactive gas into the hollow sphere; and the preparation of the silicon carbide whisker with the specific morphology can be realized only by sintering and carbon removal.