270results about How to "High degree of crystallinity" patented technology

There is provided a powder of a lithium transition-metal compound for a positive-electrode material in a lithium secondary battery, in which the use of the powder as that of a positive-electrode material in a lithium secondary battery achieves a good balance among improvement in battery performance, cost reduction, resistance to a higher voltage, and a higher level of safety. The powder of the lithium transition-metal compound for a positive-electrode material in a lithium secondary battery is characterized in that in a mercury intrusion curve obtained by mercury intrusion porosimetry, the amount of mercury intruded is in the range of 0.8 cm3 / g to 3 cm3 / g when the pressure is increased from 3.86 kPa to 413 MPa.

The invention relates to a hydrothermal synthesis method for lithium ferromanganese phosphate anode material of a lithium ion battery, belonging to the technical field of lithium ion batteries. The method has the following processing steps of: step 1, preparing LiMnxFe1-xPO4 through a hydrothermal synthesis reaction: mixing an aqueous lithium hydroxide solution, an aqueous ferrous sulfate solution and phosphoric acid under a stirring condition, after sealing, heating to 150 DEG C to 180 DEG C within 0.5 to 2 h, reacting for 0.5-4 h under the pressure of 0.48-1.0 Mpa, cooling to less than 80 DEG C, and filtering; step 2, mixing with organic matters and drying: mixing a wet filter cake with a soluble carbon source organic matter, and carrying out spray drying or expansion drying; and step 3, carrying out carbon-coated processing: roasting LiMnxFe1-xPO4 carbon source compound powder at a temperature between 600 DEG C and 750 DEG C for 4-6 h under an insert gas condition, and cooling to less than 150 DEG C to obtain a carbon-coated lithium ferromanganese phosphate anode material of the lithium ion battery. The hydrothermal synthesis method disclosed by the invention has the advantages of simple and controllable technology, convenience for operation, low cost, high crystallization degree of products, uniform dispersion, high specific capacity, high conservation rate of the cycling capacity, and the like.

The invention relates to a novel and simple low-temperature preparation method of hydroxy-functionalized grapheme, belonging to the field of novel carbon nanomaterials. The preparation method provided by the invention comprises the following steps of: adding graphite powder and potassium hydroxide solid to a ball milling tank, then adding milling balls to the ball milling tank, placing the ball milling tank in a ball mill, continuously ball-milling under air blast and room temperature conditions at a speed of 200-400 r / min for 10-16 hours, transferring the ball-mill product to a sample bottle by deionized water, and then removing unreacted potassium hydroxide by deionized water until the solution was neutral. By using the preparation method provided by the invention, hydroxy-functionalized grapheme can be prepared at room temperature, and the hydroxy-functionalized grapheme has a lamellar structure, contains a large number of hydroxyl groups on the surface, well remained internal structure and a high crystallinity.

The invention relates to a dual-rare-earth-metal organic frame material used in temperature detection and a preparation method of the dual-rare-earth-metal organic frame material. The dual-rare-earth-metal organic frame material has a structure general formula (Tb1-xEux)Ln, wherein L is an organic ligand containing a pyridine carboxylic acid group, x is more than 0 or not more than 0.5, and n is equal to 1-4. The dual-rare-earth-metal organic frame material is prepared through a hydrothermal or solvothermal reaction. The dual-rare-earth-metal organic frame material is simple in preparation process, high in yield and good in stability. The dual-rare-earth-metal organic frame material simultaneously has characteristic light-emitting peaks of rare earths of europium and terbium, is capable of realizing self-calibrating temperature detection because a good linear relation exists between a strength ratio of the two peaks and the temperature, and is high in sensitivity reaching 3.53.K<-1>; the dual-rare-earth-metal organic frame material to be expected as a novel temperature sensing material is practically applied to the field of low-temperature detection because the light-emitting color within a temperature range of 14-300K changes with the change of the temperature.

The invention relates to a magnetic separation type composite adsorbing material which is prepared from nano Fe3O4 and active carbon fiber. The ferriferous oxide nano composition fiber material is synthesized by using conventional organic solvent as the reaction medium under the control of a simple low temperature solvent thermal system. The magnetic separation type composite adsorbing material can be used as a magnetic separation type adsorbing material for adsorbing organic or inorganic pollutants to purify waste water.

The invention discloses a rare earth organic framework material for iron ion fluorescence detection and a preparation method thereof. Methoxyl functional group-containing linear dicarboxylic acid (L-OCH3) is used as an organic raw material, a hydrothermal reaction is performed on the organic raw material and metal rare earth salt, and in the reaction process, an in-situ reaction is performed on methoxyl functional groups of an organic ligand to produce hydroxyl functional groups and the rare earth organic framework material is obtained. After adoption of the hydrothermal preparation method, the method is simple and the yield is high; the prepared rare earth organic framework material can be used as a fluorescent probe and interacts with iron ions, so that fluorescence of the organic ligandis quenched and new fluorescence generating a Ln2 (L-OH) 3-Fe<3+> compound is enhanced, and the intensity ratio between two peaks has a relatively good linear relationship with the concentration of the iron ions; the rare earth organic framework material can be applied to ratio detection of the iron ions.

The invention discloses a polypropylene toughening modifying agent and a polypropylene modified product thereof. The polypropylene toughening modifying agent comprises the following components: 15-50 wt percent of polyethylene, 15-50 wt percent of polypropylene, 20-55 wt percent of ethylene / octene copolymer (POE), 0.1-2.0 wt percent of initiator and 0.05-1.0 wt percent of antioxidant. A polypropylene modified pipe and an injection molding product which are produced by adopting the polypropylene toughening modifying agent are produced by the steps as follows: 2-15 wt percent of the polypropylene toughening modifying agent and 85-98 wt percent of polypropylene resin are physically mixed, a proper amount of coloring agent is added, the polypropylene modified pipe is extruded on a single-screw pipe extruder, and the polypropylene modified product is injected-molded on an injection molding machine. The polypropylene modified product has an impact strength which is increased by 28-34.5 percent, the melting temperature which is raised by 1.5-1.8 DEG C, and the crystallinity which is increased by 26.7-35.2 percent. According to the invention, the slow secondary crystallization of the polypropylene modified product in a post-stage storage process can be effectively reduced, and the residual internal stress of the polypropylene modified product is greatly eliminated.

The invention discloses a bismuth tungstate / carbon nitride composite photo-catalyst and a preparation method and application thereof. The bismuth tungstate / carbon nitride composite photo-catalyst is synthesized through an ultrasonic stirring method by taking C3N4 obtained by co-firing Bi2WO6 synthesized in a microwave hydro-thermal way, melamine and urea as raw materials and taking methanol as a solvent. Bismuth tungstate / carbon nitride composite powder prepared by the method has a high degree of crystallinity, a heterojunction structure is formed among components, a compounding process is carried out at the room temperature, reaction conditions are mild, and the photocatalytic performance of the powder can be remarkably enhanced in comparison to Bi2WO6 powder and C3N4 powder after compounding; the bismuth tungstate / carbon nitride composite photo-catalyst has a wide application prospect on the aspect of photocatalytic degradation of organic pollutants.

The invention relates to a chemical mechanical polishing abrasive particle CeO2 and a method for preparing the same, belonging to the rare earth powder material chemical preparation technical field. The invention is to prepare the CMP abrasive particle by utilization of cerous inorganic salt solution and homogeneous precipitation agent. The method comprises the following steps that: the cerous inorganic salt and the precipitation agent are prepared into solution with certain proportion; the solution is uniformly mixed through ultrasonic vibration; deposits are generated after the solution is heated to a certain temperature; serum is kept stand, aged, filtered and calcined, and then the CeO2 abrasive particle is prepared. The method also accelerates the nucleation rate through addition of surface active agent so as to reduce the reaction temperature, and simultaneously the nodulizing degree of the abrasive particle obtained is also good. The method prepares the CMP abrasive particle, wherein, the CMP abrasive particle belongs to the single-phase cubic crystal system; the space group is O<5>H-FM3M; the dispersibility is good; the grain fineness distribution is uniform; the shape is similar to a sphere; and the specific surface area BET is more than 0 and less than 50m<2> / g.

The invention discloses a method for preparing SiCf / SiC compound material by combination of a chemical vapor carbon deposition process and a gas phase siliconizing process, comprising the following steps: taking SiC fiber as a raw material, adopting three dimensional weaving technology to prepare SiC fibre-woven pieces; taking trichloromethyl silane as a deposition material and carrying out a primary chemical vapor deposition on the SiC fibre-woven pieces with thickness of deposited SiC coating being 0.1-70 mum; then taking methane or propylene gas as a raw material and carrying out carbon deposition on SiC fibre-woven pieces by a secondary chemical vapor deposition, thus obtaining SiCf / C midbody; finally, taking simple substance silicon as a raw material and carrying out siliconizing on the SiCf / C midbody by the gas phase siliconizing process, thus obtaining the SiCf / SiC compound material. The method of the invention has the advantages of short preparation cycle and low cost, thus being capable of preparing SiCf / SiC composite material featuring high compactness, high mechanical property and thermal conduction.

The invention discloses a preparation method of columnar monocrystal nano-TiO2 array film. In the method, firstly, hydrochloric acid and alcohol substances (methyl alcohol, ethanol, butanol and glycol) are dipped into tetrabutyl titanate under the condition of stirring, and mixture is dripped into deionized water to form even solution; the solution is poured into a hydrothermal reaction kettle; the conductive surface of conductive glass cleaned by deionized water, alcohol and acetone solution faces downwards to lean against the inner wall of the reaction kettle; after the reaction kettle is put in a constant-temperature oven for hydro-thermal treatment for a period, conductive glass after reaction is washed with deionized water and naturally dried to obtain columnar monocrystal nano-TiO2. The invention has the advantages of low cost of raw materials, low experiment temperature, simple technology, convenient operation and the like. The prepared columnar monocrystal nano-TiO2 array film has adjustable density, thickness, orientation and degree of crystallinity and is suitable for industrial production. The invention can be used for solar cell film material and photocatalytic degradation organic matter material.

The invention discloses an anti-impact MPP (molypermalloy powder core) electric protection tube. The anti-impact MPP electric protection tube is prepared from the following raw materials in parts by weight: 90-110 parts of polypropylene, 5-15 parts of ethylene-propylene-diene monomer, 10-25 parts of talcum powder, 3-10 parts of brucite powder, 5-12 parts of modified micro silicon powder, 0.8-2 parts of colouring agent, 5-15 parts of nano mica, 0.5-2 parts of antioxidant, 0.5-2 parts of polytetrafluoroethylene, 10-25 parts of modified shell powder, 5-15 parts of modified hectorite, 5-25 parts of novel organic montmorillonite, 5-18 parts of melamine cyanurate, 10-25 parts of modified crystal whisker, 15-30 parts of long glass fiber, 3-8 parts of expandable graphite and 5-20 parts of intumescent flame retardants. The anti-impact MPP electric protection tube has excellent impact resistance, flame retardance, ageing resistance, cold resistance and heat resistance.

The invention relates to preparation method, product and applications thereof of an acetate deep deiodination adsorbent. The method comprises the following steps of: mixing small-pore, medium-pore and large-pore zeolite molecular sieves with different structures; forming by using an adhesive; generating chemical bonds by hydrothermal strengthening treatment; removing sodium and loading silver by ion exchange to prepare the product. The adsorbent is prepared from the following components in percentage by weight: 10-30% of small-pore zeolite, 20-50% of medium-pore zeolite and 20-70% of large-pore zeolite, and the adhesive accounts for 10-30% of the total weight of the adsorbent. The invention has the advantage that the adsorbent has strong adsorption capability on organic iodide, inorganic iodide and molecular iodine with different sizes in the strong acid medium, the total iodine content in the deep deiodination product is less than 5*10<-9>, and the adsorbent is suitable for being used as raw materials which are used for synthesizing vinyl acetate.

The invention discloses a chemical crosslink polyethylene insulating plastic used for a water tree resistant power cable and application thereof. The insulating plastic comprises the components based on the parts by weight: 100 parts of polyethylene resin, 0.5-4 parts of ethylene-acrylic ester multipolymer, 1.0-3.0 parts of peroxide, 0.02-2 parts of compound antioxidizer, 0.1-0.5 parts of nucleating agent and 0.1-1 part of siloxane. The chemical crosslink polyethylene insulating plastic used for the medium-low pressure water tree resistant power cable has good extrudability and cable forming property, less impurity content, excellent water tree resistant performance, improved internal lubricity and good surface performance; under the same current, the extruded velocity of the cable is high, the processing temperature is reduced, less low molecular gas is generated, the impurities and defects inside the material get less, the degree of crystallinity and the water tree resistant performance are improved, the production energy consumption is reduced, and the production efficiency is improved. Therefore, the invention can be used for an insulating layer or a restrictive coating of medium-low pressure power cable.

The invention relates to a method for preparing titanium dioxide of rutile phase power, which includes the following steps: prepare raw material of titanium tetrachloride to be hydrosol, which is dilute after hydrolyze, heat it to be hydrolyze, generating deposit, filter the deposit which is then washed by water and dried, obtaining the titanium dioxide of rutile phase powder. Its advantages mainly includes: (1) the crystal structure of nanometic power is rutile phase; (2) the titanium dioxide of rutile phase power is average, with good dispersibility and high level of crystallization; (3) only use titanium tetrachloride as crystallization, without any other agent and crystal; (4) it has high productivity, low cost, easy-controllable technical course and is easy to magnify experiment; (5) has fewe requirements for the equipments, suitable for industrialized production.

The invention provides a preparation method of a medical magnesium alloy capable of being evenly degraded. The preparation method comprises the following steps: designing a Mg1-a-bREaZnb alloy according to an atomic ratio; smelting raw materials at 720 DEG C to 750 DEG C to form a smelting liquid, feeding argon to stir and refine for 5 to 10 minutes, then standing at 740 DEG C for 15 to 25 minutes, cooling to 700 DEG C to 710 DEG C and pouring so as to obtain an alloy casting rod; carrying out heat preservation on the alloy casting rod at 500 DEG C to 530 DEG C for 8 to 12 hours, and cooling in an air-cooling manner; carrying out hot extrusion on the alloy casting rod subjected to the heat treatment at 380 DEG C to 430 DEG C under the conditions that the extrusion rate of an extrusion rod is 0.5 to 1mm / s and the extrusion ratio is greater than 20; carrying out aging treatment on the alloy subjected to the hot extrusion at 180 to 220 DEG C for 10 to 100 hours. The prepared magnesium-rare earth alloy which can be degraded and absorbed is excellent in mechanical property, high in corrosion resistance and even in degradation behavior. Thus, the prepared magnesium-rare earth alloy can serve as a degradable human body hard tissue implant material.

The invention discloses a dual-rare earth organic frame material with biotemperature and pH multi-detection property. The composition of the dual-rare earth organic frame material is as follows: EuxTb1-xLn, wherein x is more than or equal to 0.1 and less than or equal to 0.5, n is equal to 1-3, L is an organic ligand which contains both phthalic acid group and dipicolinic acid group. The dual-rare earth organic frame material is synthesized by virtue of a hydrothermal method. The synthetic method has the advantages of simple process, moderation in condition, easily available raw materials and higher productivity. A product has the characteristic luminous peaks of rare earth europium and terbium, the strength ratio IEu / ITb of the characteristic luminous peaks shows good exponential relation with pH, the pH value of a solution can be detected, and the pH range is 3.9-7.5; the temperature change can be responded under a fixed pH environment, the temperature change shows good linear relation with temperature, and the temperature range is 25-50 DEG C. The dual-rare earth organic frame material disclosed by the invention has the advantages of detection capacity of the biotemperature and the pH, high response speed, high sensitivity and high anti-interference capacity and can be used for effectively realizing the self calibration.

The invention pertains to methods of obtaining anisotropic crystalline films and to devices for carrying out the methods. A colloidal system with anisometric particles is applied as a film onto the surface of a substrate while the viscosity of the colloidal system is lowered. The particles of the colloidal system with lowered viscosity are oriented and the original viscosity of the colloidal system is restored. The film is then dried. The drying is carried out under controlled conditions. Zones of the dried film may be progressively heated to improve the film characteristics.

The invention discloses a dye / rare earth organic framework composite material for physiological temperature detection. The composite material has a general structural formula as follows: LnLDye, wherein Ln is a rare earth element-europium or terbium; L is quaterphenyl-3,5,3',5'-tetracarboxylic acid, 4,4-([1,1'-biphenyl]-4,4'-biradical)bis(pyridine-2,6-dicarboxylic acid), 4-(3'',5''-dicarboxylic acid)-([1,1':4',1''-terphenyl]-4-yl)pyridine-2,6-dicarboxylic acid, 2',3''-dimethyl-[1,1':4,1':4',1''-quaterphenyl]-3,3'',5,5''-tetracarboxylic acid or 2'-methyl-[1,1':4,1':4',1''-quaterphenyl]-3,3'',5,5''-tetracarboxylic acid; Dye is an organic dye-perylene, pyrene, rhodamine B or coumarin. The composite material is prepared by adopting a solvothermal reaction method and is simple in process, high in yield and good in stability; in addition, the composite material has characteristic luminescence peaks of rare earth ions and dye molecules at the same time, the strength ratio of the two peaks and the temperature form a relatively good linear relation at 20-80 DEG C, self-calibration temperature detection can be realized, and relatively high sensitivity is achieved.

The invention discloses a surface-carbon-modified cathode material of a lithium ion battery and a method for preparing the surface-carbon-modified cathode material. The method comprises the following steps of: firstly, preparing a cathode material lithium manganese nickelate (LiMn0.5Ni1.5O4) of the lithium ion battery; secondly, uniformly stirring the prepared LiMn0.5Ni1.5O4 and an organic solution at a temperature of 80 to 100 DEG C, and performing chemical reaction for 15 to 60 minutes to obtain the cathode material of the lithium ion battery, wherein the surface of the cathode material is coated with high molecules; thirdly, filtering, washing and drying; and finally, carbonizing the cathode material in an inert atmosphere to obtain the surface-carbon-modified cathode material of the lithium ion battery. Compared with a surface-carbon-unmodified cathode material of the lithium ion battery, the surface-carbon-modified cathode material of the lithium ion battery has high rate performance.

The invention relates to a method for preparing a microcrystalline glass by utilizing steel slag. The method comprises the following steps of: firstly, carrying out drying and ball milling on the steel slag and removing iron contained in the steel slag to prepare powder of 100 meshes; then mixing the steel slag powder, quartz sand, sodium nitrate, barium nitrate, zinc oxide and cerium dioxide into a compound material; placing the mixture obtained from the former step into a crucible, and smelting at 1250-1380 DEG C to form a transparent steel slag glass; and finally, crystallizing the transparent steel slag glass to form the steel slag microcrystalline glass containing calcium akermanite as a main crystal phase. The method disclosed by the invention utilizes the blast furnace steel slag as a main raw material and achieves the utilization amount of the steel slag at 96%; and the microcrystalline glass prepared according to the method has the advantages of high structural strength, low water absorption, high crystalline degree and various color. The preparation process disclosed by the invention is simple in operation process and low in cost, can effectively reduce the production cost of the microcrystalline glass, protects the environment and changes the wastes into valuables, is suitable for industrialized large-scale production and has obvious economic benefit and environmental benefit.

The invention discloses a carbon-coated CoAl-LDH@NF composite electrode material and a preparation method thereof. The preparation method disclosed by the invention comprises the steps of firstly utilizing cobalt nitrate and aluminum nitrate as a cobalt source and an aluminum source and foamed nickel as a substrate and obtaining Co-Al LDH@NF after one-step hydrothermal; then utilizing glucose or cane sugar as a carbon source to coat the Co-Al LDH@NF and performing hydrothermal treatment to obtain Co-Al LDH@NF@C. According to the preparation method disclosed by the invention, a substep hydrothermal-drying method is utilized, a preparation technology and required equipment are simple, raw materials are rich in source, reaction temperature is lower, high-temperature carbonization is avoided, and large-scale production is easy to achieve. The Co-Al LDH@NF@C composition material obtained through the method disclosed by the invention has good thermal stability, high crystallization degree and large specific surface area, further has strong morphology controllability and is one of ideal energy materials.

The invention discloses a preparation method of a resistance switch adopting TiO2 / SnO2 composite nano-rods. The preparation method comprises the following steps: 1), directly growing TiO2 / SnO2 composite nano-rod arrays on a conductive substrate according to a hydrothermal method; 2) annealing the conductive substrate, which is obtained in step 1) and provided with the TiO2 / SnO2 composite nano-rod arrays grown thereon under 200 to 800 DEG C for 1 to 5 hours, so as to obtain the resistance switch adopting the TiO2 / SnO2 composite nano-rods. The preparation method has the advantages that the indoor temperature resistance switch characteristic of the resistance switch adopting the TiO2 / SnO2 composite nano-rod array structure can be better; the resistance switch effect under a low temperature can be higher; the circulating stability is favorable; the master mould of a resistance switch-type non-volatile memorizer can be prepared.

The invention discloses a method for preparing glass ceramic by sintering bulk of solid waste coal gangue and rice husk ash serving as main raw materials. The glass ceramic provided by the invention is prepared from the following raw materials in parts by weight: 28.1 to 32.5 parts of coal gangue, 4.0 to 6.5 parts of rice husk ash, 3.5 to 5.0 parts of sodium carbonate, 7.0 to 8.5 parts of calciumcarbonate, 2 to 3 parts of magnesium oxide and 2 to 3 parts of titanium dioxide. The method comprises the following steps: mixing the ingredients evenly, and heating to a melting temperature of 1,400to 1,450 DEG C; performing quenching, ball milling and tableting on the obtained glass melt, preserving heat at 740 to 790 DEG C and 820 to 870 DEG C for 1 to 1.5 hours, and performing heat treatmentto obtain glass ceramic which takes calciclase as a principal crystalline phase and takes diopside as a secondary crystalline phase. A large amount of SiO2 in the rice husk ash serving as a raw material reduces the high aluminum characteristic of the coal gangue, adjusts the ratio of Si to Al in the formula, and improves the utilization ratio of the solid waste coal gangue and rice husk; moreover,the method has the advantages of simple formula composition, low melting temperature and relatively low heat treatment temperature; the prepared glass ceramic has high compactness, corrosion resistance and wear resistance, and the added value of two solid wastes of coal gangue and rice husk is greatly increased.

The invention relates to hierarchical titanium dioxide microspheres based on surface oriented growth nano-rods and a preparation method thereof. The hierarchical titanium dioxide microspheres are three-dimensional microspheres formed by a cluster of one-dimensional nano-rods which own a common core and grow uniformly and outwards in a radiation manner along the core. The preparation method comprises the following main steps of: adding a titanium precursor in a polycondensation reaction process of resorcinol-formaldehyde, then preparing organic gel in a sol-gel process, and finally carrying out high-temperature carbonization to obtain the titanium dioxide nano-rod microspheres with hierarchical structures. The hierarchical titanium dioxide microspheres based on the surface oriented growth nano-rods, prepared by the method, have a good adsorption performance and a good pollutant photocatalytic degradation performance; and after being used, the hierarchical titanium dioxide microspheres based on the surface oriented growth nano-rods are separated from water simply and conveniently, thus easily realizing the recycling and reusing of photocatalytic materials. In addition, the preparation method is simple in technology, the mass production is easily realized by adopting the preparation method, the appearance and size of the products are controllable, and the products are high in crystalline of degree and conform to practical production application requirements.

The invention discloses a method for directly preparing uniform alpha-type Fe2O3 nanoparticles / multilayer graphene composite material by using iron powder. Comprises the following steps: DMF and deionized water with volume ratio of 8: 2 are mixed as mixed solvent; Expanded graphite was added and treated with ultrasonic wave for 3 hours to obtain multilayer graphene mixed solution. Fe powder, dilute nitric acid and anhydrous sodium acetate are added into that mix solution; The solution is stirred in a water bath at 70-90 DEG C for 4-10 hours, cooled and centrifugally cleaned to collect black products; 3 time of centrifugal cleaning of that reactant with alcohol and water respectively, and drying in an oven at 60 DEG C for 12 hour to obtain the dried alpha-type Fe2O3 nanoparticle / multilayergraphene composite material of the invention. The invention has the advantages of simple process, wide material source, low cost, nano-sized alpha-type Fe2O3 particles, uniform particles and good dispersibility.

The invention relates to aluminum silicate fiber reinforced oxide ceramic containing an interface phase. The aluminum silicate fiber reinforced oxide ceramic adopts one or a mixture of more of mullite, aluminum silicate and aluminum oxide as a ceramic substrate and adopts aluminum silicate fiber as a reinforcing phase, and a sacrifice carbon interface phase is formed between the substrate and the reinforced phase. The preparation method of the aluminum silicate fiber reinforced oxide ceramic comprises the following steps: preparing a three-dimensional aluminum silicate fiber fabric, and preparing a pyrolytic carbon coating on the surface of the fiber fabric by utilizing a chemical vapor phase deposition process; taking oxide sol as a precursor, vacuum impregnating the fiber fabric, carrying out the gelatization, then carrying out the high-temperature ceramization, and completing the primary compacting process; repeating compacting for at least 10 times; finally carrying out oxidative cracking on carbon interface phase coating, forming a gap between the aluminum silicate fiber and the substrate, and preparing the product. The product is excellent in mechanical property both at the room temperature and high temperature and has the advantages of short preparation period, low cost, wide applicability and the like.

The invention discloses a micro-nano reinforcing steel bar anti-rusting agent for an autoclaved aerated concrete slab. The micro-nano reinforcing steel bar anti-rusting agent is prepared from the following raw materials in percentage by mass: 15-25% of organosilicone modified crylic acid emulsion, 15-20% of silicon sol emulsion, 8-12% of lime, 8-12% of silicon ash, 8-12% of cement, 8-12% of light calcium carbonate, 3-8% of a coalescing agent, 0.2-3% of a tackifier, 0.1-0.7% of a defoaming agent, 0.1-0.5% of a dispersing agent and the balance of water. The micro-nano reinforcing steel bar anti-rusting agent is relatively easy to stir uniformly, so that the dip-coating quality stability can be ensured, the bonding force of a reinforcing steel bar can be greatly increased, the anti-rusting property of the reinforcing steel bar is further improved, tests show that various indexes are all superior to those required in GB 15762-2008 and JC / T 855-1999, and meanwhile the micro-nano reinforcing steel bar anti-rusting agent has the advantages of stable quality, environment-friendliness and the like. The invention further discloses a preparation method of the micro-nano reinforcing steel bar anti-rusting agent.

The invention relates to a method for preparing a hexagonal boron nitride interface coating, which comprises the following steps of: preparing a fiber preform or a high-purity graphite substrate, performing chemical vapor deposition on a boron elementary substance, and nitriding the boron elementary substance. The method is high in designability and repeatability and simple in process. The prepared boron nitride interface coating has a graphite-like layer structure, high crystallinity and low oxygen content, is compact and uniform, can meet the requirement of a ceramic-based composite material anti-oxidation interface coating, and also can be popularized to a substrate or a surface coating material.

The invention discloses a graphene-oxide-modified polypropylene composite material which is prepared from graphene-oxide-modified polypropylene, ethylene propylene diene monomer rubber, a butadiene-acrylonitrile copolymer, a silane coupling agent, zinc borate, magnesium hydroxide, pentaerythritol, epoxy soybean oil, tritolyl phosphate, pentaerythritol stearate, yttrium oxide, nano mica powder, talcum powder, silicon micropowder, 1,3,2,4-di(3,4-dimethylbenzylidene)sorbitol, an ethylene-octylene copolymer and 2-hydroxy-4-n-octyloxy diphenyl ketone. The graphene-oxide-modified polypropylene composite material has the advantages of high strength, excellent heat resistance, excellent flame retardancy and favorable heat stability.