28 results about "Whiskers" patented technology

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 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.

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 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 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 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.

This application relates to the field of colorants, and in particular to a high thermal conductivity organosilicon colorant and its preparation method. In this application, titanium dioxide is attached to the surface of long thermally conductive particles such as whiskers using a titanium source to form a titanium dioxide-long thermally conductive particle composite system, which is then dispersed in a polymer carrier. The attached titanium dioxide enhances the coloring performance of the long thermally conductive particles. Compared with directly mixing titanium dioxide and whiskers, this method provides better coloring and thermal conductivity at the same mass.

The invention discloses a corundum brick with high corrosion resistance and a preparation method thereof, and belongs to the technical field of refractory materials, hollow nanosphere composite silicon nitride whiskers are added in the preparation process, hollow aminated phenolic resin nanospheres in the hollow nanosphere composite silicon nitride whiskers are provided with hollow pore channels, and in the high-temperature sintering process of the corundum brick, the hollow pore channels in the hollow nanosphere composite silicon nitride whiskers are uniformly distributed, so that the corrosion resistance of the corundum brick is improved. The resin is carbonized and decomposed to further generate uniform micropores / mesopores, so that a graded pore structure of primary pores and derived pores is formed, and the corundum brick has stable and uniform porous property, can block permeation of an erosion medium, and prolongs the service life of the corundum brick; the silicon nitride whiskers have extremely high chemical stability, the tolerance to metal slag, molten glass and acid and alkali erosion media is far higher than that of a corundum matrix, and a composite framework of the silicon nitride whiskers forms a continuous corrosion-resistant network in the corundum brick to directly block a permeation path of the erosion media.

The invention relates to the field of colorants, in particular to a high-thermal-conductivity organic silicon colorant and a preparation method thereof.According to the high-thermal-conductivity organic silicon colorant, titanium dioxide attachment is achieved on the surfaces of long heat-conducting particles such as whiskers through a titanium source, a titanium dioxide-long heat-conducting particle composite system is formed, and then the titanium dioxide-long heat-conducting particle composite system is dispersed in a polymer carrier; the coloring performance of the long heat-conducting particles is improved through the attached titanium dioxide, and compared with direct mixing of titanium dioxide and whiskers, better coloring performance and heat-conducting performance are provided under the same quality.

The invention discloses a Si3N4 / MXene / MWCNT electromagnetic wave absorbing material and a preparation method thereof.The wave absorbing material takes Si3N4 whiskers as a matrix, MXene nanosheets are introduced through charge regulation and control between interfaces, so that a conductive network is constructed, and MWCNT is loaded for microstructure regulation and control; the preparation method comprises the following steps: modifying the surface of a Si3N4 matrix by adopting a KH-550 silane coupling agent, preparing a Si3N4 / MXene composite material through electrostatic self-assembly, finally preparing a carboxylated MWCNT aqueous dispersion, and loading the carboxylated MWCNT aqueous dispersion to the surface of the Si3N4 / MXene through hydrogen-bond interaction to obtain the Si3N4 / MXene / MWCNT composite material. The material provided by the invention introduces interface polarization loss and dipole polarization loss while improving conductivity loss, realizes integration and collaboration of multiple loss mechanisms, optimizes impedance matching, and improves electromagnetic wave absorption capability and wider absorption bandwidth.

The invention belongs to the technical field of biology, and particularly relates to an efficient prawn DNA mixed pool construction method and breeding application. The method specifically comprises the following steps: taking prawn tails of prawns as tissues of equivalent mixed single individuals, taking one prawn tails of each to-be-treated individual, merging and mixing the taken prawn tails, cutting the same length to realize uniform mixing of the equivalent tissues of the individuals, and then extracting DNA of the mixed tissues, namely constructing a DNA mixed pool. The technical scheme provided by the invention effectively solves the problems of difficulty in accurate quantification, complex operation and high cost in construction of a large number of DNA mixed pool tissues in traditional BSA analysis, simplifies the identification process of the character-related markers, is suitable for genetic analysis of large-scale prawn samples and identification of the character-related markers, and has a wide application prospect in the field of prawn breeding.

The invention discloses a lightning-proof composite conductive adhesive film and a preparation method thereof in the technical field of aviation composite materials, and the lightning-proof composite conductive adhesive film comprises a layered body which comprises a conductive and heat-conducting layer, a low-density heat-conducting layer, a heat-insulating layer and a reinforcing layer; the number of the reinforcing layers is three, and the three reinforcing layers are distributed in an interlayer mode. And the layered body is formed by stacking and compounding layers. A three-dimensional protection system is formed by constructing a functional gradient and multi-level synergistic composite structure, when lightning stroke occurs, the adhesive film can dredge lightning stroke current along a preset path by using a low-density heat conduction network formed by graphene and silicon carbide whiskers in the adhesive film, and excessive concentration of energy at local points is avoided; meanwhile, the internal hollow phenolic aldehyde microsphere heat insulation layer effectively prevents high temperature generated by current from being conducted and diffused to the interior of the composite material matrix and peripheral sensitive parts, and the problems of heat damage and electric breakdown caused by lightning stroke are fundamentally solved.

This invention discloses a method for preparing needle-like aragonite whiskers using natural dolomite as raw material, belonging to the field of inorganic non-metallic material preparation technology. The method for preparing needle-like aragonite whiskers using natural dolomite as raw material includes the following preparation steps: S1. Pre-treating natural dolomite ore to obtain natural dolomite ore powder; S2. Preparing the natural dolomite ore powder into a suspension; S3. Mixing the suspension with magnesium chloride hexahydrate to adjust the system; then adding a composite alkali activator and mixing again to obtain a mixture; S4. Performing a constant-temperature stirring reaction on the mixture to obtain a reactant; sequentially subjecting the reactant to solid-liquid separation, washing, drying, and depolymerization to obtain a product rich in needle-like aragonite whiskers. This invention features a simple process flow, eliminates the need for complex ion separation steps, has low energy consumption, conforms to the concepts of green manufacturing and sustainable development, and produces aragonite whiskers with high purity, regular morphology, and good dispersibility.