62results about How to "Ablation resistant" patented technology

The invention provides a ceramic matrix composite material and a preparation method thereof, wherein a carbon fiber preform is used as a skeleton, and is immersed in a hafnium-tantalum-silicon ternarycomposite phose ceramic precursor solution, and curing and cracking are performed to prepare the composite material. According to the preparation method, a pyrolytic carbon interface layer is prepared on a carbon fiber preform by using a chemical vapor infiltration method, matrix densification treatment is performed by using a hafnium-tantalum-silicon ternary composite phose ceramic precursor impregnation cracking method, and finally pore sealing treatment is performed by using a chemical vapor infiltration method. According to the present invention, the method has characteristics of simple process and short development period; and the prepared ultra-high temperature ceramic matrix composite material has the uniform distribution of various components of the matrix, has characteristics ofultra-high-temperature resistance, oxidation resistance and ablation resistance, can be used as the high temperature thermal structure material for hypersonic vehicles and rocket propulsion systems, and has broad application prospects.

The invention discloses a rapid preparation method of an Al2O3-SiO2 based composite material. The method comprises the following steps: a) weighing silica sol and an alumina micro powder according toa certain ratio, adding the alumina micro powder into the silica sol, performing magnetic stirring for more than two hours, and forming a turbid liquid of a silica sol doped alumina micro powder; b) clamping high-temperature resistant inorganic fiber cloth or a thin-layered fabric by a high-temperature resistant mold, vacuumizing in a vacuum container, and sucking the turbid liquid of a silica soldoped alumina micro powder for performing mass-impregnation; rapidly transferring the high-temperature resistant inorganic fiber cloth or thin-layered fabric impregnated with turbid liquid into a drying oven to perform heat treatment, and enabling the inorganic fiber cloth or thin-layered fabric to gel; naturally cooling to a room temperature so as to perform cross-linked curing, and repeatedly performing mass-impregnation-gelling-natural cooling for 5-10 times; c) performing high-temperature heat treatment on obtained hard solids in a muffle furnace, and finally cooling to the room temperature, so as to obtain the Al2O3-SiO2 based composite material.

The invention discloses a silicone rubber heat-insulating material for integral solid rocket ramjets and a preparation method thereof. The silicone rubber heat-insulating material comprises the following components in parts by weight: 20-80 parts of methylvinyl silicone rubber, 20-80 parts of methylvinylphenyl silicone rubber, 1-3 parts of accelerator, 15-40 parts of silica white, 5-15 parts of chopped carbon fiber, 3-10 parts of graphene, 3-10 parts of hafnium oxide and 0.5-2 parts of vulcanizing agent. The silicone rubber heat-insulating material for integral solid rocket ramjets can form a high-melting-point ceramic-like layer in the ablation process, has the advantages of high temperature resistance, ablation resistance, favorable elasticity, high micromolecule migration resistance and the like, and can satisfy the operating environments of oxygen enrichment, high-temperature high-speed gas flow and particle erosion.

The invention discloses an industrial and mineral JP cabinet intelligent constant temperature system including a JP cabinet body, a refrigeration and heating device, an internal heat exchanger, an external heat exchanger, a first driving oil pump, a second driving oil pump, and a plurality of temperature sensors, the refrigeration and heating device, the internal heat exchanger, the first driving oil pump, the second driving oil pump, and the plurality of temperature sensors are arranged in the JP cabinet body, an external heat exchanger is arranged at the outer side of the JP cabinet body, and the refrigeration and heating device includes a heating device, a refrigerator, a controller, a plurality of groups of semiconductor refrigeration sheets, and a casing. The industrial and mineral JP cabinet intelligent constant temperature system acquires the temperature signal in the JP cabinet through the temperature sensors, the controller controls the on and off of the first driving oil pump and the second driving oil pump based on the temperature signal, and moreover, the controller controls the flow direction of the oil medium in the interface pipe and the switching of the semiconductor refrigeration sheets according to the temperature signal and reliably ensures the constant temperature in the JP cabinet.

The invention provides a low-temperature rapid preparation method of a ZrO2-SiO2-based composite material. The method comprises the following steps: (a) weighing silicon oxide sol and ZrO2 micropowderaccording to a certain ratio, adding the ZrO2 micropowder into the silicon oxide sol and magnetically stirring for six or more hours to form suspension liquid of the silicon oxide sol doped with theZrO2 micropowder; (b) clamping a high-temperature-resistant inorganic fiber cloth or a thin-layer fabric by using a graphite die, putting the high-temperature-resistant inorganic fiber cloth or the thin-layer fabric in a vacuum container and vacuumizing, then sucking the suspension liquid obtained in the step (a) and completely dipping the high-temperature-resistant inorganic fiber cloth or the thin-layer fabric; then rapidly transferring the dipped high-temperature-resistant inorganic fiber cloth or thin-layer fabric into a drying oven for carrying out heat treatment for gelatinizing, naturally cooling to room temperature and solidifying, repeatedly carrying out overall dipping, gelatinizing and naturally cooling for 5-8 times; and (c) putting the obtained hard solid in a muffle furnace for carrying out high-temperature heat treatment under the treatment temperature being lower than 800 DEG C, finally cooling to the room temperature to obtain the ZrO2-SiO2-based composite material.

The invention discloses a flame-retardant and high-temperature-resistant computer cable. The cable comprises core wires, first wrapping layers, a second wrapping layer, a shielding layer, an armor layer and a sheath layer. Each core wire comprises tinned copper core conductors and insulating layers; the outer side of each tinned copper core conductor is wrapped with the corresponding insulating layer; every two core wires are twisted to form a pair wire set; and the outer side of each pair wire set is wrapped with the corresponding first wrapping layer. According to the invention, the quartz fiber maintenance sleeve layer on the outer side of the cable has the advantages of flame retardance, high-temperature resistance, insulationresistance, ablation resistance, corrosion resistance, heatinsulation ability, wave transmission ability, excellent dielectric property and the like; the cable can be protected from combustion in case of a fire; compared with polyethylene insulation, the performance of the the cross-linked polyethylene insulation is greatly improved after cross-linking modification; the comprehensive performance such as the mechanical performance, the environmental stresscracking resistance, the chemical corrosion resistance, the creep resistance and the electrical performance is remarkably improved; and the temperature resistance level is remarkably improved.

The invention provides a remote-transmission ventilated temperature sensor. A shell has a mounting part and a probe part. A thermosensitive element and an insulating element are arranged at the inner side of the probe part; the space around the thermosensitive element is filled with thermal conductive silicone; and probes are pressed on thermosensitive element electrodes by springs. An infrared absorbing film covers the outer side of the lower end of the probe part and is arranged at the periphery of the thermosensitive element. Besides, the mounting part is provided with a main controller, a wireless communication module and a power supply; and ventilation holes are formed in the side wall of the mounting part. The remote-transmission ventilated temperature sensor provided by the invention has advantages of light weight, excellent corrosion-resistant, high-temperature-resistant, and low-temperature-embrittlement-resistant performances, and high rigidity and the like. The thermosensitive element is fixed by the thermal conductive silicone and heat conduction is realized by the thermal conductive silicone, so that sensitivity and anti-vibration performances are improved. The positive probe and the negative probe are pressed on the positive electrode and the negative electrode of the thermosensitive element under pressing by the springs; when thermal expansion and cold contraction phenomena occur at the probes, the pressures between the probes and the electrodes can be adjusted at any time by the springs, thereby realizing reliable electrical connection. A temperature value can be transmitted to a remote central control terminal wirelessly; remote monitoring can be realized; and tedious wiring is avoided.

The invention provides a protective layer for batteries, a preparation method of the protective layer and an application of the protective layer in a battery pack. The protective layer for the batteries includes a fireproof cloth and a functional layer arranged on the fireproof cloth, and the functional layer is a thermosetting resin layer formed by performing curing on an epoxy resin substrate, an epoxy resin curing agent, a reinforcing filler, a flame retardant and a silane coupling agent. The protective layer for the batteries provided by the invention has the characteristics of high strength, ablation resistance, thermal shock resistance and flame retardancy, and can withstand explosive impact, block sparks and inhibit combustion diffusion, effectively avoid battery fire or explosion,and improve safety during use of the batteries.

The invention provides a spaceflight ablation heat-proof chopped fiber / phenolic aldehyde high-density premix, a manual premixing preparation method and a composite material thereof The spaceflight ablation heat-proof chopped fiber / phenolic aldehyde high-density premix is prepared from high-temperature-resistant chopped fibers and high-residual-carbon phenolic aldehyde under the action of an auxiliary agent by adopting a manual premixing process, and is prepared by the steps of cutting yarns, drying the yarns, preparing glue, manually premixing, tearing, laying, airing, drying, testing, packaging, storing, starting and the like to prepare an intermediate material which has a certain pre-curing degree, is in a scattered state and has no certain direction of fibers. Then the spaceflight ablation heat-proof composite material is prepared from the chopped fiber / phenolic aldehyde high-density premix in a closed mold at a certain temperature and pressure through the mold pressing process. The resin content of the premix is (33-55)%, and the density of the composite material formed by the premix through the mold pressing process is (1.45-1.85) g / cm < 3 >. The premix prepared by the manual premixing method has the manufacturability advantages of being good in mold pressing fluidity, suitable for manufacturing composite material products with complex structures, high in resin content precision, capable of forming composite materials in net size and the like; and the composite material formed by the premix through a mold pressing process has excellent characteristics of ablation resistance, high temperature resistance, heat insulation, flame retardance and the like, has certain mechanical strength, and can be applied to the fields of aerospace ablation heat protection, civil use and the like.

The invention relates to ceramic glass with lanthanum disilicate as a principal crystalline phase, a preparation method and application. The ceramic glass is obtained by carrying out nucleation and crystallization treatment on base glass. The base glass consists of the following oxides in mole percent: 22-26% of La2O3, 3-5% of MgO, 11-13% of Al2O3 and 58-62% of SiO2. The preparation method comprises the following steps: melting the various raw materials at the temperature of 1,520-1,530 DEG C; pouring melted liquid in a mold and annealing at the temperature of 650-680 DEG C to obtain the base glass; heating the base glass until the temperature of the base glass is higher than glass conversion temperature which is 40-60 DEG C, carrying out nucleation, and continuing heating to the temperature which is equal to devitrification temperature + / - 10 DEG C to obtain a ceramic glass material. The preparation method is simple, energy consumption is low, the ceramic glass is environmentally friendly, the production cost is low, and the obtained material can be used as a thermal barrier coating material, a high-temperature-structure material, an anti-friction and anti-abrasion material and the like.

The invention discloses a modified epoxide resin adhesive with high strength and a preparing method thereof. The modified epoxide resin adhesive is prepared from, by weight, 80-100 parts of epoxide resin, 3-21 parts of carboxylic acrylonitrile butadiene rubber latex, 1.1-7.7 parts of polyacrylate latex, 5-10 parts of quartz powder, 1.1-1.5 parts of aluminium silicate, 2-3 parts of anti-settling agent, 1-3 parts of aminopropyltriethoxysilan; the ratio of carboxylic acrylonitrile butadiene rubber latex to polyacrylate latex is 2.7:1; the modified epoxide resin adhesive with high strength has good properties of ablation resistance, acid and alkali resistance, moisture absorption and thermal stability, aging resistance, anti-shearing force, high insulation and high sealing, and in terms of electrical insulation property, due to quartz powder added in the formula, and the product after solidification has stronger insulation property and ablation resistance property.

The invention overcomes the defects of the prior art and provides a battery graphite anode material prepared by using nano graphite carbon powder and a method of preparing the same. Obtained is the graphite anode material featuring high quality, high reliability, high energy density, long life, high cathode utilization, high initial discharge efficiency and the like; to solve the above technical problem, a following technical scheme is used: a battery graphite anode material prepared by using nano graphite carbon powder and a method of preparing the same, wherein the graphite anode material is 30-70 nm in particle size D, > / =2.33 g / cm<2> in true density, < / =0.01% in ash content, > / =1.13 g / cm<2> in tap density, < / =1.7 g / cm<2> in specific surface area, 325-355 mAh / g in initial discharge capacity and > / =90% in initial discharge efficiency, and the desired battery graphite anode material is obtained through calcining and graphitizing; the invention is widely applicable to the field of battery graphite anode materials.

The invention relates to a preparation method of aromatic thermosetting resin containing polycarboxyl metal phthalocyanine. The method includes: employing a phthalic anhydride method to prepare polycarboxyl metal phthalocyanine, adding the metal phthalocyanine into an aromatic thermosetting resin prepolymer monomer and mixing them uniformly, leaving the mixture to undergo a high temperature reaction so as to obtain two prepolymers, i.e. Cx-MPc-COOH and Ax-MPc-COOH, mixing the two prepolymers uniformly, performing high temperature curing, thus obtaining an aromatic thermosetting resin composite material containing polycarboxyl metal phthalocyanine. The various monomers for synthesizing the aromatic thermosetting resin are terminated by carboxyl and ester groups, the polycarboxyl metal phthalocyanine can undergo chain transfer reaction with the monomers so as to be introduced into a molecular network structure of aromatic thermosetting resin. The method makes use of the excellent electron donating ability of metal phthalocyanine to perform coupling with the conjugated structure of aromatic thermosetting resin, thus reaching the purpose of improving dielectric properties of aromatic thermosetting resin. With the properties of high temperature resistance, ablation resistance, easy adhesion and the like, the aromatic thermosetting resin prepared by the invention has important applications in micro-electronics, semiconductors, electromagnetic materials, electrical smart materials and other fields.

The invention discloses a tungsten carbide reinforced carbon matrix composite material and a preparation method. Mesocarbon microbeads are adopted as the matrix, and tungsten carbide ceramic is adopted as the reinforcement phase and is evenly distributed among the carbon microbeads so as to form a three-dimensional network tungsten carbide skeleton reinforced isotropic structure. The preparation method includes: firstly taking tungsten oxide particles and mesocarbon microbeads as the raw materials to prepare uniform and thickness controllable tungsten carbide coating coated mesocarbon microbead powder by molten salt process, then performing pre-press molding, and conducting discharge plasma sintering at 1500-1900DEG C to form a uniform three-dimensional network tungsten carbide ceramic skeleton, which can significantly improve the strength, ablation resistance and oxidation resistance of the carbon matrix, thus forming the isotropic carbon matrix composite material characterized by lowcost, low density and excellent mechanical properties, sintering performance and ablation resistance. Because of the excellent comprehensive performance, the tungsten carbide reinforced carbon matrixcomposite material can be widely applied to aerospace, national defense and other fields, and has broad application prospects.

The invention relates to a low-temperature ceramic flame-retardant functional masterbatch, which comprises the following components by mass: 10-25 parts of silicone rubber, 5-15 parts of silicone resin, 2-6 parts of aluminum hypophosphite, and 2-10 parts of glass microspheres 2-8 parts of montmorillonite, 10-25 parts of natural bone powder, 25-50 parts of synthetic ceramic bone powder, 1-2 parts of coupling agent, 1-3 parts of lubricant and 1-3 parts of dispersing agent. The invention also relates to a method for preparing low-temperature ceramicized flame retardant functional masterbatch, which improves the dispersibility and increases the carbon formation rate, so that the carbon layer with a multi-dimensional stable structure has a high precipitation rate and integrity rate. The flame retardant masterbatch prepared by the invention can be ceramicized at low temperature when the material encounters flame attack, and can form a continuous and dense ceramic oxygen barrier layer, which has the characteristics of high efficiency and environmental protection.

The invention provides a low-temperature rapid preparation method of a ZrO2-SiO2-based composite material. The method comprises the following steps: (a) weighing silicon oxide sol and ZrO2 micropowderaccording to a certain ratio, adding the ZrO2 micropowder into the silicon oxide sol and magnetically stirring for six or more hours to form suspension liquid of the silicon oxide sol doped with theZrO2 micropowder; (b) clamping a high-temperature-resistant inorganic fiber cloth or a thin-layer fabric by using a graphite die, putting the high-temperature-resistant inorganic fiber cloth or the thin-layer fabric in a vacuum container and vacuumizing, then sucking the suspension liquid obtained in the step (a) and completely dipping the high-temperature-resistant inorganic fiber cloth or the thin-layer fabric; then rapidly transferring the dipped high-temperature-resistant inorganic fiber cloth or thin-layer fabric into a drying oven for carrying out heat treatment for gelatinizing, naturally cooling to room temperature and solidifying, repeatedly carrying out overall dipping, gelatinizing and naturally cooling for 5-8 times; and (c) putting the obtained hard solid in a muffle furnace for carrying out high-temperature heat treatment under the treatment temperature being lower than 800 DEG C, finally cooling to the room temperature to obtain the ZrO2-SiO2-based composite material.

The invention provides a battery protective layer, a preparation method and its application in battery components. The battery protective layer includes a fireproof cloth and a functional layer arranged on the fireproof cloth, and the functional layer is mainly composed of epoxy A thermosetting resin layer formed by curing the resin matrix, epoxy resin curing agent, reinforcing filler, flame retardant and silane coupling agent. The battery protection layer of the invention has high strength, ablation resistance, heat shock resistance and flame retardancy, can withstand explosion impact, block sparks and inhibit combustion diffusion, effectively avoid battery fire or explosion, and improve battery safety during use.