39results about How to "Composite structure is stable" patented technology

The invention discloses a Light-Emitting Diode (LED) high heat conduction ceramic bonding copper heat dissipation circuit board characterized in that a copper foil is compounded on both sides of a ceramic chip, a copper-aluminum spinelle eutectic interface is between the copper foil and the ceramic substrate; a circuit formed by two faces of copper foils of the ceramic substrate are interconnected and guided through a sintered via hole. The invention employs the process principle that the low temperature thermal oxidized copper foil and the ceramic can form the eutectic interface. At 1060 DEG C-1080 DEG C, the copper and an oxide film form a trace amount of copper-cuprous oxide eutectic liquid phase. The eutectic liquid phase and aluminum, magnesium, zirconium and oxygen elements in the ceramic form the copper-aluminum spinelle eutectic interface and the copper foil and the ceramic substrate form a firm compound structure. The invention has excellent performance of high heat conduction, strong conduction ability, high adhesive force and low interconnection via hole resistance, and obviously improves the operation life and reliability by applying to the LED chip package.

The invention discloses an air filtration membrane with functions of killing bacteria and removing formaldehyde. The air filtration membrane is of a three-layer nanofiber membrane composite structure, wherein the upper layer is an activated carbon nanofiber membrane, the middle layer is a pure TiO2 nanofiber membrane, and the lower layer is a nano-silver antibacterial fiber membrane; the pure TiO2 nanofiber membrane is prepared from a high polymer material/TiO2 precursor composite nanofiber membrane through heat treatment, and the high polymer material/TiO2 precursor composite nanofiber membrane is prepared with an electrospinning method; the activated carbon nanofiber membrane is an electrospun activated carbon nanoparticle/high polymer material composite nanofiber membrane; the nano-silver antibacterial fiber membrane is an electrospun nano-silver particle/high polymer material composite nanofiber membrane. The air filtration membrane not only can filter solid particulate pollutants very well, but also is good in breathability, and can remove and decompose formaldehyde in air and filter and kill harmful bacteria in air, thereby guaranteeing health of a respiratory system better.

The invention relates to stirring type fruit-flavor goat milk kefir, belonging to the field of milk products. The stirring type fruit-flavor goat milk kefir contains the following main components: raw milk, sugar, fruit juice, polymerized whey protein, pectin and a kefir starter, wherein the fruit juice is prepared from concentrated fruit juice through restoration; and a polymerized whey protein solution is prepared by virtue of a neutral thermal polymerization method. By fermenting twice and adding the concentrated fruit juice, a three-dimensional network structure formed by acid gel can exert the effects of thickening, improving the stability of the fruit juice and covering the goaty flavor of the goat milk, so that the problem that the fermented milk products are deteriorated due to the addition of the fruit juice in the prior art is solved. The kefir starter is a commercial ready-to-use starter consisting of lactococcus lactis, leukonid, Streptococcus thermophilus and Lactobacillus acidophilus. The stirring type fruit-flavor goat milk kefir prepared by virtue of the preparation method has the characteristics of high probiotic content, protein content and viscosity, low dehydration shrinking rate and goaty flavor of the goat milk, special flavor, uniform color, fine texture and the like.

An installation aid (1) is provided for a ventilation nozzle (100) and a ventilation duct of a motor vehicle, which are connected to during the installation, the installation arranged on the ventilation nozzle or the ventilation duct and having a material section (2), which protrudes forward in the installation direction (3) beyond the ventilation nozzle or the ventilation duct when the installation aid is fastened on the ventilation nozzle or the ventilation duct (200) and is at least partially insertable into the ventilation duct or the ventilation nozzle. Before the installation of ventilation nozzle and ventilation duct against one another, with the installation aid fastened on the ventilation nozzle, the material section is fixed in motion with respect to the ventilation nozzle or, if the installation aid is fastened on the ventilation duct, the material section is fixed in motion with respect to the ventilation duct.

The invention discloses a nano titanium nitride-based composite photocatalytic material as well as a preparation method and application thereof, belonging to the technical fields of inorganic non-metallic nano material preparation, environmental protection technologies and solar energy utilization. According to the nano titanium nitride-based composite photocatalytic material, controllable surface oxidation is carried out on nanoscale titanium nitride particles, so that a composite photocatalytic material which takes nano titanium nitride as a core and titanium dioxide as a shell is formed. The nano titanium nitride-based composite photocatalytic material has adjustable optical adsorption property, thus being directly used for solving the problems of decomposition of organic matters under visible light, inactivation of microbial pathogens and efficient utilization of solar energy, and especially solving the problem of low photocatalytic efficiency of single-component photocatalytic materials.

The invention discloses a preparation method of a surface composite coating for a bottom plate of a reduction furnace. The preparation method of the surface composite coating for the bottom plate of the reduction furnace comprises the following steps of preparing a bonding layer: adopting hot spraying for preparing a layer of bonding layer on the inner surface of a stainless steel bell jar, wherein the bonding layer is prepared from one of raw materials: Ni, Ti, Cu, Fe, Zn, C-Co, WC-10Co4Cr, MCrAIY, a high-entropy alloy, NiTi, NiCr and stainless steel; and preparing an antifouling coating: utilizing gas power spraying for preparing the antifouling coating with high compactness, high bonding strength and high heat stability on the surface of the bonding layer, wherein the antifouling coating is prepared from a raw material which is silver powder. According to the preparation method, on one hand, the process step can be simplified, and the production cost is reduced; and on the other hand, the structure stability of the coating can be improved, and the service life of the coating is prolonged.

The invention discloses anti-impact composite kerb and a preparation method thereof. The kerb comprises a decorative surface layer and a base layer, wherein the decorative surface layer is prepared from the following raw materials in parts by weight: 80-100 parts of waste plastics, 20-30 parts of pulverized fuel ash, 10-20 parts of silicon dioxide, 5-15 parts of SBS modified asphalt, 3-8 parts of stabilizer, 1-5 parts of a coupling agent and 1-3 parts of antioxidant; and the base layer is prepared from the following raw materials in parts by weight: 50-60 parts of silicate cement, 20-30 parts of quartz sands and 6-12 parts of construction glue powder. The preparation method of kerb comprises the steps of preparing the decorative surface layer, preparing materials of the base layer and combining the decorative surface layer with the base layer. According to the composite kerb and the preparation method, the composite kerb has good corrosion resistance, good temperature resistance, strong tensile strength, strong impact resistance and simple preparation process, and can be easily molded.

The invention provides a manufacturing method for color kerbstones. The method includes the steps that firstly, a layer of color concrete is laid on a bottom layer of a die 1 to form a color surface layer 2; secondly, a rectangular steel wire mesh 5 is placed on the color surface layer 2 and vertical to the bottom layer of the die 1, an interval is reserved between the steel wire mesh 5 and one side of the die 1, a rectangular steel wire mesh 6 is horizontally placed on the color surface layer 2, one side of the steel wire mesh 6 is aligned to the lower edge of the steel wire mesh 5 to form a right angle, and the other sides of the steel wire mesh 6 are aligned to side walls of the die; thirdly, the color concrete is injected into the interval between the steel wire mesh 5 and the die to form a color surface layer 3, common concrete is injected to the other side of the steel wire mesh 5, and a basic body 4 is formed; fourthly, the die is covered with a cover plate, and the color concrete and common concrete in the die are flattened and compacted. The color kerbstones are firm in composite structure, and color surface layers do not easily fall out.

The invention discloses a lithium-rich manganese-based ternary composite precursor, a positive electrode material and a preparation method of the positive electrode material, and the positive electrode material is spherical or sphere-like particles, is formed by compounding three layers of materials, and comprises an inner core, a transition layer and a shell. The preparation method of the positive electrode material comprises the following steps: mixing a first nickel salt, a first cobalt salt, a first manganese salt, a first aluminum salt and an M2 salt to obtain a first metal liquid; second nickel salt, second cobalt salt, second manganese salt, second aluminum salt and M3 salt are mixed to obtain second molten metal; the first molten metal and the second molten metal are mixed to form third molten metal; carrying out a first mixing reaction to obtain a manganese-rich hydroxide core; forming a transition layer outside the inner core through a second mixing reaction; forming a ternary hydroxide shell outside the transition layer through a third mixing reaction to obtain a precursor; and mixing the precursor with a lithium source, and sintering to obtain the positive electrode material. The lithium ion diffusivity of the whole material can be remarkably improved, and the thermal stability, the first efficiency, the cycle performance and the rate capability of the material are remarkably improved.

The invention provides a SiOx@C-CNT-G composite negative electrode material, which is provided with a plurality of secondary particles, the secondary particles comprise SiOx@C particles, carbon nanotubes and graphene sheets, the SiOx@C particles are SiOx particles coated with a nano carbon layer, and the carbon nanotubes grow in situ on the nano carbon layer of the SiOx@C particles; the graphene sheets are in bridge connection with the SiO@C particles through the carbon nanotubes; wherein the mass fraction of SiOx in the SiOx@C-CNT-G composite material is 60-90%. The graphene composite three-dimensional structure can provide space for volume expansion of SiOx particles, meanwhile, in-situ growth of CNT improves the conductivity and structural stability of the composite material, volume expansion of the material in the charging and discharging process is reduced, the contact surface of SiOx and an electrolyte is reduced through coating of graphene, and the stability of an SEI film of the composite material is improved.

The invention discloses flexible flame-retardant aerogel as well as a preparation method and application thereof, and belongs to the technical field of aerogel. The flexible flame-retardant aerogel is prepared from the following raw materials: nanocellulose, sodium alginate, organosilane, boric acid, sodium tetraborate decahydrate, calcium carbonate and D-(+)-gluconic acid delta-lactone, and the nanocellulose comprises cellulose nanowires and cellulose nanofibers with carboxyl-rich surfaces. According to the invention, the degree of association between single nanocellulose is improved by utilizing the morphological structure characteristic of high length-diameter ratio of the cellulose nanowires so as to improve the flexibility of the aerogel, and the intrinsic flame retardant property of sodium alginate and the synergistic flame retardance of the boron-based flame retardant are utilized, so that the aerogel has wide application prospects in the fields of aerospace, buildings, special-shaped part flame retardance, heat insulation and the like.

The invention provides a monovalent selective cation exchange membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: defoaming a membrane casting solution of a blended polymer material, and scraping to obtain a membrane to obtain a negatively charged base membrane; the blended polymer material comprises a functionalized polymer material and a corresponding non-functionalized polymer material; sequentially contacting the surface of the negatively charged base membrane with a water phase solution and an oil phase solution for primary interfacial polymerization, and then contacting with the water phase solution for secondary interfacial polymerization to obtain the monovalent selective cation exchange membrane. The simple and mild preparation method is adopted, through two interfacial polymerization reactions, a compact anti-charge skin layer is constructed on the surface of the negative charge base membrane, and efficient separation of monovalent and multivalent cations by the monovalent selective cation exchange membrane is achieved.

The invention relates to the technical field of composite kraft paper, in particular to five-in-one composite kraft paper. The composite kraft paper comprises a composite kraft paper body, and the composite kraft paper body comprises a kraft paper layer, a first PE film layer, a PE woven fabric layer, a second PE film layer and an EPE layer; the end surface of the kraft paper layer and the first PE film layer is fixedly provided with kraft paper convex portions, positions, located on the end surface of the kraft paper layer, of two adjacent kraft paper convex portions are fixedly provided withkraft paper concave portions, the kraft paper convex portions and the kraft paper concave portions are provided with a first adhesive layer, and the first PE film layer is adhered to the first adhesive layer; and one end surface, far away from the first adhesive layer, of the first PE film layer is adhered to a second adhesive layer, the second adhesive layer is arranged on upper PE woven fabricconvex portions and upper PE woven fabric concave portions, and the upper PE woven fabric convex portions and the upper PE woven fabric concave portions are fixedly arranged on the end surface of thePE woven fabric layer. According to the composite kraft paper provided by the invention, through the above arrangement, the properties of the composite kraft paper, such as tensile strength, punctureresistance, waterproofing and shock absorption can be greatly improved.