53results about How to "Stable chemical and physical properties" patented technology

The invention discloses a bottle cap assembly separating materials and water. The bottle cap assembly is composed of a bottle cap and an opening, wherein the bottle cap and the opening are matched through meshed threads, and a cutting knife facing towards the bottle cap is arranged in the opening. The bottle cap assembly is characterized in that a material barrel is arranged in the bottle cap, and a gap capable of sufficiently containing the thickness of the opening is reserved between the material barrel and inner side threads of the bottle cap; a sealing film is arranged on the opening of the material barrel; a safety belt is arranged on the opening in the outer edge of the bottle cap, and a blocking edge for limiting the position of the safety belt is arranged on the outer side of the opening. The bottle cap assembly is provided with a beverage containing cavity, and is convenient in brewing operation and simple in structure. In addition, mixing is completed before bottle opening, and sanitation and health are achieved.

The invention relates to core-shell type carbon microspheres and a preparation method and application thereof. The carbon microspheres are prepared by a glucose hydrothermal synthesis method; and the surface of the microspheres is clad with a layer of ethylene glycol terephthalate by taking terephthalic acid and ethylene glycol as raw materials and adopting an in-situ polymerization method to obtain core-shell type microspheres. The core-shell type microspheres provided by the invention are black spherical powder, and the thickness of the cladding layer is 15-30nm; the core-shell type microspheres have stable chemical and physical performance, do not agglomerate easily, and can be used as a flame retardant; and moreover, with good compatibility with a polymer base material, the core-shell type microspheres can effectively improve the flame retardance of the polymer base material.

The invention belongs to the technical field of nanomaterials and particularly relates to a doped carbon dot and graphene compound as well as a preparation method and an application thereof. The preparation method comprises the steps as follows: lipoic acid, ethylenediamine, phytic acid and the like are used as mixed element precursors to be dissolved in deionized water and uniformly mixed, and doped carbon dots are obtained through a hydrothermal reaction in a reaction kettle; the carbon dots are added to a graphene oxide aqueous solution to be subjected to a hydrothermal reaction, then washing and drying are performed, and the doped carbon dot and graphene compound is obtained. The electro-catalysis effect best for oxygen reduction can be obtained by adjusting the type of mixed elements in the carbon dots and the proportion of the carbon dots to graphene. The preparation method is simple and easy to implement and low in cost; the chemical and physical properties of the obtained material are stable, a representative nitrogen and sulfur double-doped carbon dot-graphene composite can realize the four-electron transfer process for oxygen reduction, the reduction overpotential is obviously smaller than that of single-doped samples and other doped samples, and the material can be applied to electro-catalysis of oxygen reduction reactions on cathodes of fuel cells.

The invention relates to a surface modification method of multi-walled carbon nanotubes; terephthalic acid is adopted as a modifying material according to the characteristics of the multi-walled carbon nanotubes and polymeric matrixes, ultrasonic dispersion and ethylene glycol coating can be carried out on the multi-walled carbon nanotube in an ultrasonic dispersion machine, surface modification is carried out under the states of oil bath, heating, stirring, nitrogen protection and water circulation condensation in a four-port flask, and the coated and modified multi-walled carbon nanotube can be prepared after washing, extraction filtration and vacuum drying are carried out, the thickness of a coating layer can reach 5-15nm, the diameter is 40-60nm, and the length is 20mum, chemical physical properties are stable, agglomeration is hard, various chemical substances can be matched, the compatibility is good, the process in the surface modification method is advanced, a used equipment material is less, the process flow is short, and the magnitude is completely accurate, therefore, the method is very ideal.

The invention discloses a method for preparing a nickel-phosphorus-ultrafine diamond (Ni-P-UFD) composite coating by a chemical plating or electroplating process. The method comprises the following steps of: performing a surface activation treatment before plating; selecting a proper chemical plating or electroplating solution formula; adding a special amphoteric surfactant; uniformly dispersing the ultrafine diamond grains (UFD) into the Ni-P chemical plating and electroplating solution by using radio frequency ultrasonic dispersion technology; and continuously introducing argon gas (Ar) into the bottom of a plating solution container during the chemical plating or electroplating process and continuously and mechanically stirring the solution to prepare the Ni-P-UFD composite coating with higher hardness, wear resistance and high-temperature performance than those of the conventional Ni-P coating while ensuring that the plating solution is not decomposed or precipitated and the chemical and physical properties are stable and reliable. The method solves the problem of homodisperse of second-phase grains of the ultrafine diamond in the plating solution and the film layer.

The invention provides an XPE environment-friendly foam material for an anti-static / flame-retardant vehicle and a preparation method of the XPE environment-friendly foam material. The XPE environment-friendly foam material is mainly prepared from, by weight, 60-80 parts of PE resin, 4-8 parts of anti-static agent, 20-30 parts of self-made composite flame retardant, 5-20 parts of foaming agent, 2-5 parts of cross-linking agent and 3-5 parts of blowing promoter. The material is prepared through extrusion of an XPE master slice in a single-screw extruder, calendaring, continuous normal-pressure foaming in a foaming furnace, cooling and shaping, and trimming and coiling. Anti-static and flame-retardant performance is integrated in the XPE foam material, the formulation is simple and scientific, the material has the anti-static performance and the flame-retardant performance, chemical and physical performance is stable, electrostatic induction and inflammability are completely eliminated, and the foam material is safe, free of toxins and smells and environmentally friendly, and saves energy.

The invention relates to a rapid and simple preparation method of nano-zinc oxide, which takes zinc chloride and sodium hydroxide as raw materials, takes the sodium hydroxide as a strong alkaline regulator, takes oleic acid as a precipitant, takes anhydrous ethanol as a solvent and a centrifugal separating agent, takes deionized water as the solvent and a cleaning agent and takes argon as protective gas. The rapid and simple preparation method comprises the steps of firstly preparing zinc chloride and sodium hydroxide water solution, then mixing with the oleic acid and the anhydrous ethanol for forming solution, carrying out chemical reaction and grain growth under the state of 20 DEG C, carrying out high-speed centrifugal separation, washing and vacuum drying, and finally preparing the white, granular, petal-shaped and single crystal nano-zinc oxide. The preparation method is rapid and simple and can be completed within 4-5 hours without the need of heating, the product has regular and clear appearance, the diameter of single crystal is 2-4mu m, the thickness of single flake is 4-5nm, the chemical and physical performances are stable, the prepration cost is low, the yield can be as high as 92.5%, the product has high purity which can achieve 99.7%, so that the preparation method is the ideal rapid and simple preparation method of the nano-zinc oxide.

The present invention is liquid benzene medium arc discharge process of preparing onion-shaped fullerene. Through arc discharge with liquid benzene as material and discharge medium, ferrocene as catalyst, deionized water as coolant, air as isolator and graphite rod as electrodes, inside arc discharge trough, and at DC voltage of 22V-25 V, current of 50 A and power of 800-1200 W, suspension solution is prepared; and through further filtering in a filtering machine, purification in a tubular high temperature furnace, grinding, sieving and vacuum drying, nanometer level onion-shaped fullerene is obtained at yield of 70 %. The nanometer level onion-shaped fullerene has regular layered molecule arrangement, powder size of 10-30 nm, stable chemical and physical properties and high graphitization degree, and may be used in many industrial fields.

The invention relates to a method for preparing weather-resisting steel ingots, aiming at special technique requirements of weather-resisting steel ingots. The method comprises the following steps: heating to smelt an iron-carbon alloy inside a vacuum sensing smelting furnace under the protection of argon, subsequently adding a weather-resisting reinforcing and toughening substance to smelt, casting into ingots, heating and forging the ingots, and annealing at middle temperature so as to prepare the pole-shaped weather-resisting steel ingots. The method is advanced in process and detailed and precise in data, the chemical and physical properties and mechanical properties of the weather-resisting steel are stable, the grain size is 12.3mu m, the extension strength is as high as 836MPa, the yield strength is as high as 721MPa, the impact toughness is as high as 354J, the corrosion rate in a 3.5% NaCl solution can be reduced by 73%, and the method is an ideal method for weather-resisting steel ingots.

The invention discloses a preparation method of carbon-10 heavy aromatics low-naphthalene high-boiling-point aromatics solvents. The preparation method includes the steps: (1) separating carbon-10 heavy aromatics by the aid of multistage distillation devices and distillation methods, and collecting products with a distillation range of 260-290 DEG C; (2) treating the products acquired in the step(1) by the aid of a crystallization device and a liquid solid separation device to obtain the carbon-10 heavy aromatics low-naphthalene high-boiling-point aromatics solvents. Crystallization temperature ranges from -5 DEG C to -26 DEG C. The content of naphthalene in the aromatics solvents prepared by the method is lower than enterprise standards, the aromatics solvents are free from environmentalpollution, good in environmental-friendly performance and excellent in performance, high-dissolving ability can be played in the later evaporation phase, so that a coating is good in flatness and luster and free from orange peel, use safety of the aromatics solvents is improved, and the aromatics solvents can be used as advanced varnish baking solvents, pesticide emulsifiable concentrate solvents, polyurethane waterproof grouting material solvents, plasticizers and the like.

The invention discloses a method for electrolessly gilding surface of glass selectively. The method comprises the following steps of: firstly, engraving to form a groove by using femtosecond laser; secondly, coating a silver nitrate solution in the formed groove; thirdly, irradiating the groove by using the femtosecond laser to decompose silver nitrate and deposit a silver atom in the groove; and finally, placing glass with the groove in which the silver atom is deposited into a prepared gold plating solution, gilding the glass at constant temperature for 0.5 to 1h, taking the gilded glass out, and washing and annealing the gilded glass. By the method, nanoscale gold lines which have high selectivity, adhesivity and conductivity and are embedded into the surface of the glass can be prepared.

The invention relates to a preparation method of nano titanic acid tablets. In the preparation method, sodium hydroxide and potassium hydride are used as alkali melting agents, titanium dioxide is used as a titanic acid raw material, de-ionized water is used as a cleaning agent, a washing agent and an extracting agent, and absolute ethyl alcohol is used as a washing agent and a dry support to synthesize nano titanic acid tablet monocrystal under atmospheric pressure of 0.1MPa at low temperature of 200 DEG C. A dispersing agent is not used in synthesis, the used raw materials are fewer, the process flow is short and the product is in a monocrystal structure. The titanic acid tablets are 2-4nm thick and 120-150nm long and have stable chemical and physical properties, and the purity is as high as 99.5%. The preparation method has the characteristics of low synthesis temperature, accurate combination, low cost and the like, is simple to operate and is an ideal method for quickly preparing the nano titanic acid tablets.

The invention belongs to the field of polyurethane foam sealants and in particular relates to a colored polyurethane foam sealant as well as a preparation method and application thereof. The colored polyurethane foam sealant is prepared from the following components in parts by mass: 30 percent to 40 percent of paraffin wax, 10 percent to 30 percent of polyether polyol, 20 percent to 40 percent of polymethylene polyphenyl isocyanate (MDI), 2 percent to 5 percent of a stabilizer, 2 percent to 5 percent of a catalyst, 2 percent to 5 percent of a solvent and 5 percent to 10 percent of pigment. The preparation method of the colored polyurethane foam sealant comprises the following steps: mixing the components in an environment of 20 DEG C to 50 DEG C and stirring until all the components are completely dissolved; adding a mixture and the solvent into a pressure-resisting container at a certain ratio under the condition that dimethyl ether gas is fed, and sufficiently shaking to obtain a finished product. The colored polyurethane foam sealant has the beneficial effects that the colored polyurethane foam sealant is used for rockworks, artificial stones and artificial driftwoods in the field of manufacturing and decoration and the field of aquascapes; the pigment is blended so that the color is very consistent to a real landscape and the landscape is vivid; the colored polyurethane foam sealant is safe and reliable and has strong plasticity, so that the aquascape cost is reduced.

The invention relates to a method for preparing V2O5-adding NiCuZn ferrites, which is characterized in that a ferrite precursor is synthesized in a four-mouth flask under the conditions of water bath, electric heating, stirring, water-cycling condensation and argon protection by using nickel sulfate hydrate, copper sulfate hydrate, zinc sulfate hydrate and ferrous sulphate hydrate as raw materials, using ammonium oxalate as precipitating agent, using polyvinyl alcohol as dispersant, using ethanol as detergent, using vanadium oxide as sintering agent and using argon as protective gas. The particular steps are as follows: preparing blended solution firstly; filtering, washing and drying so as to obtain precursor powder; calcining the precursor powder at a temperature of 800 DEG C; then adding vanadium oxide as sintering agent and deionized water into the precursor powder; carrying out ball-milling on the obtained mixture; pressing the mixture subjected to ball-milling into circular cake-shaped products; finally, carrying out low-temperature sintering on the circular cake-shaped products at a temperature of 870 DEG C so as to obtain the final product. The preparation method is advanced, and grains are uniform and stable in chemical and physical properties, therefore, the preparation method is an ideal method for preparing the NiCuZn ferrites.

The invention discloses a poultry feed additive and a preparation method and application thereof, and aims to provide the poultry feed additive used for detoxicating mycotoxin and preventing and controlling fungal infection, and the preparation method and application thereof. The feed additive comprises the following components in percentage by weight: 1 to 4 percent of clotrimazole or 1 to 3 percent of nystatin, 5 to 20 percent of malto-oligosaccharides, 5 to 12 percent of glucurolactone, 10 to 20 percent of glucomannan polymer, 20 to 40 percent of sepiolite, 0.2 to 1 percent of vitamin C and the balance of conventional feed additive auxiliary material. Different adsorbents are mixed in a proper ratio so as to contribute to improving detoxication effect. Various active components are reasonably compatible, so the feed additive has synergism, and has the effects in various aspects such as treating the fungal infection, avoiding mould damaging livestock organisms, detoxicating organisms and adsorbing the mycotoxin, and has quick response, good treatment effect and safe use when used for detoxicating the mycotoxin and preventing and controlling the fungal infection.

The invention relates to a heat-insulating chemical filament. The heat-insulating chemical filament comprises, by weight, 17-22 parts of natural ceiba fibers, 5-8 parts of electric mountain flour, 6-10 parts of rutile powder, 2-4 parts of vinylphosphonic acid, 12-18 parts of silks, 10-15 parts of nano silicon oxide, 12-15 parts of polyimide powder, 13-20 parts of wool, 9-14 parts of zinc oxide and 14-19 parts of polylactic acid fibers. The obtained heat-insulating chemical filament has the advantages that the chemical filament produced according to the special raw material formula has circular cross section and stable chemical and physical performance, the heat insulation temperature is larger than or equal to 250 DEG C, the water solution temperature is 80-90 DEG C, the breaking strength is larger than or equal to 3.5cN / dtex, and the monofilament fineness is 2-10dtex; the manufacture process is simple and beneficial to large-scale popularization and application.

The invention provides an XPE environment-friendly foam material for an anti-static / flame-retardant vehicle and a preparation method of the XPE environment-friendly foam material. The XPE environment-friendly foam material is mainly prepared from, by weight, 60-80 parts of PE resin, 4-8 parts of anti-static agent, 20-30 parts of self-made composite flame retardant, 5-20 parts of foaming agent, 2-5 parts of cross-linking agent and 3-5 parts of blowing promoter. The material is prepared through extrusion of an XPE master slice in a single-screw extruder, calendaring, continuous normal-pressure foaming in a foaming furnace, cooling and shaping, and trimming and coiling. Anti-static and flame-retardant performance is integrated in the XPE foam material, the formulation is simple and scientific, the material has the anti-static performance and the flame-retardant performance, chemical and physical performance is stable, electrostatic induction and inflammability are completely eliminated, and the foam material is safe, free of toxins and smells and environmentally friendly, and saves energy.

The invention relates to the technical field of film material preparation, in particular to an antistatic agent, an antistatic release film and a preparation method of the antistatic release film. Theantistatic release film comprises a base film layer and a functional layer, wherein the functional layer is prepared from the antistatic agent. The antistatic agent comprises the following componentsin parts by weight: 0.05-0.5 parts of a conductive monomer, 20-40 parts of light-cured organic siloxane resin, 60-80 parts of a light-cured organic silicon release agent and 0.05-0.5 parts of a photoinitiator. The antistatic release film disclosed by the invention is stable in characteristics, adopts a photocuring mode, is thorough in curing, forms a polymer film, and is stable in chemical and physical properties, stable in stripping force and antistatic capacity, good in adhesive force and less in silicon transfer. The process is simple and is completed at one time, the production efficiencyis high, the cost is low, and few waste materials are generated in production.

The invention relates to a stripping treatment method for a cotton-polyester blended fabric and aims to solve the problem in stripping treatment of the cotton-polyester blended fabric. The method comprises the following steps: swelling, dissolving, reducing and stripping the fabric at a high temperature in a dyeing tester, washing and drying, so that the color of the cotton-polyester blended fabric is removed, and the cotton-polyester blended fabric restores to the state before dyeing. The stripping method is advanced in process, detailed and accurate in data, environment-friendly and good in stripping effect, the stripping rate is 94.97 percent, the physical and chemical properties and mechanical property of the stripped cotton-polyester blended fabric are stable, and the method is an ideal stripping treatment method for the cotton-polyester blended fabric.

The invention relates to a method for preparing white needle-shaped six-edge mono-crystalline nano-zinc oxide. Zinc chloride and sodium hydroxide are taken as taw materials; sodium hydroxide is used as an alkaline regulator of the pH value and deionized water as solvent, cleaning agent, washing agent and vacuum drying support. The method comprises the following steps: firstly, preparing the water solutions of zinc chloride and sodium hydroxide; mixing the water solutions; carrying out a chemical reaction in the mixed solution under the conditions of water-bath heating, stirring and water-circulation condensation; finally preparing the powdery product, that is, the white needle-shaped six-edge mono-crystalline nano-zinc oxide, through centrifugal separation, washing and vacuum drying after the grain growth and separation in the reaction. The method has the advantages of short preparation period, low heating temperature and low material consumption; and the product has the advantages that the morphology and the color are pure, the product is in a regular shape with the diameter being 80 to 100nm and the maximum length being 2,500nm; the preparation cost is low; the yield is as high as 65%; and the purity of the product (zinc oxide) is 99.5%.

The invention belongs to the technical field of release films, and provides an ultralight release force free radical photocuring release film which comprises the following components in parts by weight: 40-140 parts of polysiloxane, 0.8-1.5 parts of a leveling agent, 0-5 parts of an adhesion additive, 1-5 parts of an antistatic agent, 1-2 parts of fumed silica powder and 3-4 parts of a photoinitiator. The invention also provides a preparation method of the ultralight release force free radical photocuring release film. The release film disclosed by the invention is stable in chemical and physical properties, stable in release force and anti-static capability, good in adhesive force and less in silicon transfer; 20-minute release force and aging release force of the release film can be stably and accurately controlled to be 1-2.5 cN / 2.5 cm, and 24-hour residual adhesive force is larger than 85%. The process is simple, one-time operation is completed, the production efficiency is high, the cost is low, and few waste materials are generated in production.

The invention relates to antibacterial health-care fiber yarn which is prepared from the following components in parts by weight: 8-14 parts of natural plant extract, 23-36 parts of silk, 12-17 partsof bamboo charcoal fiber, 5-9 parts of pomegranate peel, 6-11 parts of chitin, 9-14 parts of acetic acid, 0.9-1.8 parts of ferroferric oxide and 1-3 parts of aluminum chloride, wherein the natural plant extract includes aloe, rhizoma coptidis, gromwell roots and Indian mockstrawberry herb. The invention also relates to a preparation method of the antibacterial health-care fiber yarn. The fiber yarn produced according to the formula and the method has stable chemical and physical properties; by adding the natural plant extract, the fiber yarn has inhibitory effects on staphylococcus aureus, candida albicans, escherichia coli and the like; the fiber yarn also has the health-care effects of promoting blood circulation, calming mind and the like; and the fiber yarn is lasting in effect, is less affected by the washing frequency and is suitable for production of textiles such as underwear, bedding, home decoration and the like.

The invention discloses a bottle cap assembly separating materials and water. The bottle cap assembly is composed of a bottle cap and an opening, wherein the bottle cap and the opening are matched through meshed threads, and a cutting knife facing towards the bottle cap is arranged in the opening. The bottle cap assembly is characterized in that a material barrel is arranged in the bottle cap, and a gap capable of sufficiently containing the thickness of the opening is reserved between the material barrel and inner side threads of the bottle cap; a sealing film is arranged on the opening of the material barrel; a safety belt is arranged on the opening in the outer edge of the bottle cap, and a blocking edge for limiting the position of the safety belt is arranged on the outer side of the opening. The bottle cap assembly is provided with a beverage containing cavity, and is convenient in brewing operation and simple in structure. In addition, mixing is completed before bottle opening, and sanitation and health are achieved.

A disclosed oil-resistant plastic product is characterized by comprising the following raw materials in parts by weight: 40-80 parts of polyvinyl chloride, 30-50 parts of nitrile-butadiene rubber, 42-62 parts of dibutyl phthalate, 0.6-1.0 part of a vulcanizing agent, 0.12-0.20 part of a promoter DM, 1.8-2.2 parts of a sulfuration activator, 0.2-0.6 part of a softening agent, 0.4-0.6 part of an anti-aging agent, 0.8-1.2 parts of an anti-oxidant, 1.0-1.4 parts of barium stearate, 1.6-2.0 parts of lead stearate, 22-42 parts of half-reinforced carbon black and 3-5 parts of coumarone resin. Compared with the prior art, the advantages comprise that (1) the produced plastic product is low in price and simple in production technology; and (2) the produced product still has stable chemical and physical performances under the condition of long-term immersing in oil stain, and the surface of the plastic is not dissolved by oil stain.

The invention belongs to the field of titanium oxide preparation, and specifically relates to a method of taking wastes as a carbon source to prepare a carbon doped titanium oxide visible light catalyst. Sodium hydroxide and potassium hydroxide are mixed and taken as a melted solvent; agricultural and forestry wastes (fern leaves) and titanium dioxide are taken as the raw materials; a hydrochloricacid solution with a pH value of 1 is taken as an extracting agent; deionized water is taken as a washing agent and a detergent; anhydrous ethanol is taken as a detergent and a dry carrier; under a normal pressure, at a low temperature of 180 DEG C, a carbon precursor-titanate composite material is synthesized, and the composite material is burned at a temperature of 450 DEG C to obtain the carbon doped titanium oxide catalyst with a porous structure. The product purity is high, the chemical and physical properties are stable; the carbon surface contains hydrophilic functional groups, thus the carbon doped titanium oxide catalyst has good water dispersibility, moreover, the light responding range is enlarged to the visible light waveband of sunlight, and the catalyst has visible light catalytic activity.

The invention discloses a radioactive waste solidification base material and a preparation method of solidified glass. The invention is characterized in that: the radioactive waste solidification basematerial is natural magmatic rock, which mainly comprises the following components by weight percentage: 45%-65% of SiO2, 9%-18% of Al2O3, 4%-12% of CaO, 3%-10% of MgO, 6%-16% of Fe2O3+FeO, 2%-9% ofNa2O+K2O, 1%-5% of TiO2, and the balance 1%-5%. The preparation method includes: adding simulated radioactive waste into natural magmatic rock, performing powder milling, conducting melting at 1400-1500DEG C for 3-4.5h, and carrying out molding, annealing and cooling, thus obtaining solidified glass. The radioactive waste solidified glass prepared from the radioactive waste solidification base material provided by the invention has good chemical stability and thermal stability, obvious solidification effect and low weight loss rate of simulated radioactive waste elements.

The invention discloses efficient anti-static liquid and a preparation method thereof. The efficient anti-static liquid is prepared from the following raw materials by weight percent: 10-21% of electric conducting liquid, 4-10% of nano electric conducting particles, 65-80% of a solvent, 3-10% of a hyperdispersant, and 0.5-2% of an adhesion additive. The efficient anti-static liquid is rational inmatching, better in electric conducting effect through adding the electric conducting liquid, and capable of remarkably improving electrical conductivity through adding a little of nano electric conducting particles, and lower in cost compared with a current anti-static product, and good in effect; capable of effectively dispersing the nano electric conducting particles and the electric conductingliquid through the hyperdispersant, enabling a system to be uniformly distributed, and enabling electric conducting values of the prepared products to be consistent; and capable of improving adhesionthrough the adhesion additive, combining with other products more firmly, effectively preventing anti-static liquid layer falling and wrinkling phenomena, good in adhesive force, excellent in anti-aging property, long in service life, and good in comprehensive performance.

The invention discloses low-cost phosphate fluorescent powder for a white-light LED (light-emitting diode) and a preparation method of the low-cost phosphate fluorescent powder. The general chemical formula of the fluorescent powder is Ca19-xZn2(PO4)14-y (SiO4)y:xDy3+, wherein x is more than or equal to 0.0095 and less than or equal to 0.95, and y is more than or equal to 0 and less than or equal to 0.4. The Ca19Zn2(PO4)14 is adopted as a matrix, so that good stability is achieved. Through charge compensation that PO4<3-> is replaced by SiO4<4->, the luminous intensity of the fluorescent powder is greatly improved, blue light (484nm) and yellow light (575nm) are emitted, and the fluorescent powder can be matched with a near ultraviolet light chip to be applied to a white light LED. In the invention, the fluorescent powder is prepared by adopting a sol combustion method, so that the process of repeated calcination in a high-temperature solid-phase method is avoided, a drying process in a sol-gel method is also avoided, and the preparation period is shortened. The fluorescent powder has the advantages of simple synthesis process, low synthesis temperature, short synthesis period, uniform size distribution of the fluorescent powder, good luminescence property and the like.

The invention provides a calibration device for a road section flaw detection and structural layer thickness ground penetrating radar. The device is technically characterized in that a bracket is horizontally placed on the ground through ground legs; a bottom pad is placed on the ground at the middle of the bracket; a metal plate is horizontally placed on the bottom pad; a thickness sample is horizontally placed on the metal plate in an overlapped manner, and a height adjusting knob and a height adjusting frame are fixed on a cross beam of the bracket; an antenna suspension beam is fixed on alower cross beam of the height adjusting frame, and the ground penetrating radar antenna is fixed on the antenna suspension beam, wherein the height is adjusted according to different sizes of the ground penetrating radar antenna and the thickness sample group. The device has the advantages that the device is simple in structure, stable in chemical and physical properties, good in uniformity, stable in dielectric constant, convenient to store and not prone to deformation of the thickness sample set, and can cover all thicknesses required by ground penetrating radar calibration. The height adjusting function meets the calibration requirements of different types of ground penetrating radars, the operation is simple and convenient, and a reliable basis is provided for data evaluation of the ground penetrating radars.

The invention discloses a dispersion-filled composite functional metal thermal-insulation layer, comprising a thermal insulation outer box, and gamma shielding layers, a boron carbide powder and a metal reflective foil which are packed inside the thermal insulation outer box, wherein the gamma shielding layers are prepared from an inorganic shielding material with metal characteristics; the orderof filling in the thickness section of the thermal insulation layer is: an inner shell plate of the thermal insulation outer box, an inner-side gamma shielding layer, multiple layers of metal reflective foil, an outer-side gamma shielding layer and an outer shell plate of the thermal insulation outer box, the boron carbide powder is uniformly dispersed in the cavity between adjacent two layers ofmetal reflective foil; and the metal reflective foils are arranged in a positive and negative double-ball-socket corrugated shape arranged at intervals in a vertical and horizontal regular way or a positive and negative triangular corrugated shape or chocolate corrugated shape with periodic variation, and adjacent two layers of metal reflective foil are alternately stacked in a way of the top point of a positive ball socket facing the top point of a negative ball socket. The invention provides the composite metal thermal insulation layer with thermal insulation function and radiation shieldingfunction, and can be used in a high-temperature radiation environment for a long time without replacement.