46 results about "Ytterbium fluoride" patented technology

The present invention provides a film system structure of ZnS substrate with inverse 0.5-0.8[Mu]m visible light, laser with 1.064[Mu]m and transparent medium wave infrared colour separation with 3.7-4.8[Mu]m. The film system structure comprises a ZnS substrate and a color separation film system, and the color separation film system is made of three film materials; the number of the film layers is 51, wherein the first layer and the 51th layer are oxidation zirconium film layer, the even layers from the second layer to the 50th layer are ytterbium fluoride film layers and the odd layers from the second layer to the 50th layer are zinc sulfide film layers. The transmittance is smaller than 2% with the waveband from 0.5 to 0.8 [Mu]m; the transmittance is smaller than 1% with the laser waveband of 1.064 [Mu]m; and the transmittance is larger than 95% with the medium wave infrared band from 3.7 to 4.8 [Mu]m. The film system structure is small in the number of layers, small in thickness, low in plating difficulty, good in technology repeatability, high in obtained film firmness and good in spectral property, is able to satisfy the use requirement of multi-waveband co-window optoelectronic system and the work requirement in the condition of the inclination with 45 degrees, and stand against the environment tests such as high and low temperature storage, temperature impact and the like, the adhesion test and the moderate friction test.

The invention discloses a radiation refrigeration optical filter which comprises a substrate. A single surface of the substrate is polished, a metal reflecting layer is arranged on a rough surface ofthe substrate, and an intermediate layer and a top layer are sequentially arranged on the polished surface of the substrate; the intermediate layer comprises layers A and layers B which are alternately arranged; the thicknesses of each layer A and each layer B are 50-400 nm; the layers A are made of silicon dioxide or aluminum oxide, and the layers B are made of titanium dioxide or silicon nitrideor silicon carbide; alternatively, the layers A are made of titanium dioxide or aluminum oxide, and the layers B are made of silicon dioxide or silicon nitride or silicon carbide; the top layer is made of ytterbium fluoride or yttrium fluoride or zinc sulfide; multi-resonant absorption enhancers in wavebands of atmospheric transparent windows (with the wavebands of 8-13 micrometers) are jointly formed by the intermediate layer and the top layer. Compared with the traditional optical filters, the radiation refrigeration optical filter has the advantages that the radiation refrigeration opticalfilter can work in intense light for a long time, and radiation refrigeration can be passively implemented by the radiation refrigeration optical filter.

The invention relates to a method for preparing a rare-earth doped potassium yttrium fluoride up-conversion luminescence nano material. The method comprises the following steps: 1) weighing yttrium oxide, sylvite and a fluorine source, adding in an oleic acid/oleylamine-containing solvent system, stirring and mixing, thus obtaining a first uniform solution; 2) weighing ytterbium fluoride and a rare-earth activator, adding in the oleic acid/oleylamine-containing solvent system, stirring and mixing, thus obtaining a second uniform solution; 3) rapidly heating the first uniform solution to a high temperature, and meanwhile rapidly filling the second uniform solution, and sufficiently stirring to react, thus obtaining a third uniform solution; and 4) cooling the obtained solution to room temperature, performing centrifugal separation, washing, and drying, thus obtaining the rare-earth doped potassium yttrium fluoride up-conversion luminescence nano material. The method has the beneficial effects that the preparation period of the material is effectively shortened, new ideas and ways are provided for preparing the up-conversion luminescence nano material, large-scale popularization and application are facilitated, and the purposes of controllable the monodisperse particle size, high quantum yield and the like are solved.

The invention relates to a low-refractive-index infrared optical coating material and a preparing method thereof, and belongs to the technical field of optical coating materials. According to the weight proportions of ytterbium fluoride and calcium fluoride, the ytterbium fluoride ranges from 85%-99.5%, the calcium fluoride ranges from 0.5%-15%, a ytterbium fluoride and calcium fluoride mixture obtained after proportioning is sintered, the sintering temperature is 700 DEG C-1250 DEG C, and the fusion step is executed; and the sintered sintering mixture is subject to vacuum fusion for 3 h to 6h at above 1260 DEG C, and a ytterbium fluoride and calcium fluoride fusion mixture is obtained. The low-refractive-index infrared optical coating material has the beneficial effects that in the ytterbium fluoride material, a certain amount of calcium fluoride is guided in, the ytterbium fluoride and the calcium fluoride evaporate at the same time and are deposited on the optical surface, due to the difference of crystalline forms of the calcium fluoride and the ytterbium fluoride, the directional growth condition in the original single ytterbium fluoride deposition process is prevented, and an even optical film layer with the small internal stress is formed; and as the internal stress is reduced, when a multi-layer film is plated, stability of the multi-layer film is guaranteed, and the problem of film cracking of the multi-layer film is solved.

The invention provides a film system structure of an ultra-wide-angle laser and long-wave infrared dual-band high-strength antireflection film. The film system structure is composed of a zinc sulfidesubstrate and an antireflection film system. The antireflection film system is formed by superposing film layers prepared from four thin film materials, wherein the total number of the film layers is19, and, from the zinc sulfide substrate, the first layer is hafnium oxide, odd layers from the second layer to the eighteenth layer are ytterbium fluoride film layers, even layers are zinc sulfide film layers, and the nineteenth layer is a silicon nitride film layer. According to the invention, high transmission of 1.064 [mu]m laser and 7.5-10.0 [mu]m long-wave infrared rays in an ultra-wide angle range of 0-76 degrees can be realized; the film layers are firm and high strength is achieved; the structure can pass severe environment tests such as wind tunnels, sand dust, raining, salt mist, damp heat, temperature impact and the like in national military standard GJB 150-2009; the structure can meet the application requirements of multi-spectral zinc sulfide optical windows of radar stealthhigh-speed weapon platforms and can be applied to stealth optical windows of multi-band common-optical-path optical systems of stealth airborne and stealth ship-based high-speed weapon platforms.

The invention discloses Ge-As-Se infrared glass with an anti-reflection film and a preparation method thereof. The Ge-As-Se infrared glass with the anti-reflection film comprises a Ge-As-Se infrared glass base layer, the Ge-As-Se infrared glass base layer is composed of 12% of Ge, 28% of As and 60% of Se by weight, and a first ytterbium fluoride layer, a first zinc sulfide layer, a second ytterbium fluoride layer and a second zinc sulfide layer are deposited on the Ge-As-Se infrared glass base layer successively. The Ge-As-Se infrared glass of the invention can effectively prevent the anti-reflection film from falloff, and the reflectivity of the infrared glass is reduced.

The invention discloses a barium fluoride up-conversion transparent ceramic and a preparation method thereof, and belongs to the technical field of optically functional materials. The existing alumina up-conversion transparent ceramic has low up-conversion luminous efficiency and is prepared difficultly. The barium fluoride up-conversion transparent ceramic utilizes barium fluoride transparent ceramic as a matrix and comprises: by mole, 60 to 89% of barium fluoride, 10 to 25% of ytterbium fluoride, and 1 to 15% of one or more of fluorides of erbium, holmium, neodymium, thulium and promethium. The preparation method comprises the following steps of blending raw material nanometer powder according to the mole percentage, wherein barium fluoride powder has particle sizes of 20 to 80nm and rare earth fluoride powder has particle sizes of 10 to 90nm, pressing the blended raw material nanometer powder into a biscuit, pre-sintering the biscuit at a temperature of 500 to 800 DEG C for 0.5 to 5 hours, carrying out vacuum sintering of the pre-sintered biscuit under the conditions of pressure of 50 to 500MPa, a vacuum degree of 10<-2> to 10<-3>Pa, a heating rate of 1 to 20 DEG C/min, a sintering temperature of 600 to 1200 DEG C and sintering time of 0.5 to 5 hours, and cooling to a room temperature at a rate of 1 to 20 DEG C/min to obtain the barium fluoride up-conversion transparent ceramic.

The invention relates to the technical field of ceramic material preparation, provides high-thermal-conductivity silicon nitride ceramic and a preparation method thereof, and solves the problem of lowthermal conductivity of silicon nitride ceramic in the prior art. The silicon nitride ceramic comprises the following components in parts by weight: 60-90 parts of silicon nitride, 8-12 parts of silicon carbide, 3-5 parts of rare earth chloride, 0.2-1 part of ytterbium fluoride, 0.5-2 parts of zirconium nitride and 5-10 parts of dispersing agent. According to the preparation method, the rare earth chloride is added, so that the sintering activity of the silicon nitride powder is improved under the condition of not additionally introducing oxygen, and densification of the silicon nitride ceramic is realized; the ytterbium fluoride can promote diffusion of Si and N and react with oxygen impurities in silicon nitride crystal lattices, so that the content of dissolved oxygen in the silicon nitride crystal lattices is effectively reduced, and the heat conductivity of silicon nitride is improved; zirconium ions in the zirconium nitride have strong affinity to oxygen and can absorb part of oxygen impurities in crystal lattices. Rare earth chloride, ytterbium fluoride and zirconium nitride are matched with one another, the size of silicon nitride grains can be increased, and oxygen impurities can be discharged.

The invention provides an ytterbium doped calcium fluoride microcrystal and fluorophosphate glass composite and a preparation method thereof. The composite is formed through uniformly dispersing ytterbium doped calcium fluoride microcrystals into the fluorophosphate glass body, wherein the ytterbium doped calcium fluoride microcrystals accounts for 10%-50% in weight ratio, and the particle size of the microcrystals is 10-20 micrometers. According to the invention, the powder mixture of fluorophosphate glass, calcium fluoride and ytterbium fluoride is subjected to high temperature thermal treatment and then low temperature quenching, the preparation flow is simple, convenient and safe, the crystalline phase is high in content, and expensive equipment is not needed.

The invention relates to an ultrathin film material for electronic product and a preparation method thereof. The method is as below: first reacting diisoprene diepoxide with 3-tridecylfluorooctyl propylene in the presence of diisopropyl peroxydicarbonate to obtain an epoxy substance containing fluorine; then mixing N-methylphenethylamine ytterbium fluoride, and zirconia, then adding a tetrahydroquinoline compound and graphite; finally adding the fluorine-containing epoxy substance and trimethylsilyl chloride to obtain a film material precursor; f dissolving the film material precursor in a composite solvent to prepare a mixed solution with solid content of 75%; then spraying the mixed solution on a substrate, drying at 93 DEG C, curing at 180 DEG C to obtain the ultrathin film material for electronic products. The disclosed preparation method has wide source of raw materials, and simple and controllable manufacturing process only requiring routine operation, and is easy for industrialization.

The invention discloses a heat-conducting electronic alloy material. The heat-conducting electronic alloy material comprises the following components of, in parts by weight, 20-30 parts of copper, 10-15 parts of iron, 3-10 parts of silicon, 1-6 parts of nickel, 0.1-1 part of zinc, 0.5-1 parts of phosphorus, 3-10 parts of graphite powder, 0.5-1 parts of ytterbium fluoride, 0.5-1 parts of titanium dioxide, 8-10 parts of epoxy resin and 4-6 parts of alicyclic epoxy resin. The heat-conducting electronic alloy material has good heat-conducting property and mechanical property, and the development and application of the heat-conducting electronic material composition can be met. The electronic material is reasonable in formula design and simple in manufacturing method, the mechanical strength and the anti-corrosion effect of the material are improved while the conductive performance of the material is ensured, and meanwhile, the production cost is reduced, the anti-fatigue performance of theelectronic material is improved, so that the electronic alloy material with excellent bending processability is obtained; the electronic alloy material has the advantages of being high in stability,good in corrosion resistance and good in heat conductivity.

The invention relates to a method for quickly preparing ultraviolet phosphors. The method comprises the following steps of: adopting aluminum fluoride, ytterbium fluoride and thulium fluoride as raw materials, mixing, calcining, grinding, sieving and detecting so as to finally prepare an ultraviolet phosphors product, which can emit ultraviolet. The preparation method has short process flow, use equipment is less, the environment can not be polluted, the product has high purity reaching to 96.7 percent, a particle diameter of powder is small and is less than or equal to 38 mum, the luminescence property is good, the ultraviolet phosphors can light on a blue light, a green light and a red light in a conversion manner, and the method is a very ideal method for quickly preparing ultraviolet phosphors excited by infrared light.

The invention discloses a high-temperature-resisting CO2 laser antireflection film and a preparing method thereof. The high-temperature-resisting CO2 laser antireflection film comprises a base layer,a first yttrium fluoride layer, a ytterbium fluoride calcium layer, a zinc selenide layer and a second yttrium fluoride layer are sequentially deposited on the base layer, and the coverage area of each of the first yttrium fluoride layer, the ytterbium fluoride calcium layer, the zinc selenide layer and the second yttrium fluoride layer accounts for 95% or above of the surface area of the base layer. The high-temperature-resisting CO2 laser antireflection film is simple in structure and exquisite in design, through combination of the four layers including the first yttrium fluoride layer, theytterbium fluoride calcium layer, the zinc selenide layer and the second yttrium fluoride layer, the characteristics that high temperature resistance is achieved, the transmittance rate is high, filmlayers are firm, stress between the film layers is complementary, and the film layers are not prone to fracture are achieved, and the situation of continuous work of elements under the high-temperature condition can be achieved; and materials used in various layers are free of radioactivity, and harm cannot be caused to operators or the environment.

The invention relates to a preparation method of a composite hard sheet for tropical bubble cap package. The preparation method comprises the specific steps that a mixture of titanium dioxide, ytterbium fluoride and zirconia is calcined after being ball-milled to obtain a filler; dihexylamine and the filler are mixed, and then N-formyl morpholine, diethyl phosphonate and benzimidazole are mixed; diisoprene bicyclo oxide, polyamide and ethoxylated trimethylolpropane triacrylate are sequentially added into the mixture, and stirring is performed at the temperature of 170 DEG C for 5 minutes to obtain a compound; the compound is added to an extruder; then, a polyester film with the surface subjected to corona treatment is prepared into a composite polyester film through the extruder; the composite polyester film and an aluminum foil are subjected to hot-pressing compounding to obtain an aluminum plastic material; then the aluminum plastic material is prepared into the composite hard sheet for tropical bubble cap package through the extruder. The raw materials adopted in the preparation method are wide in source, the preparation process is simple and controllable, only conventional operation is needed, and industrialization is easy.

The invention discloses a self-moisture-absorption cold-forming polyvinyl chloride composite material for packaging drugs, and a preparation method of the self-moisture-absorption cold-forming polyvinyl chloride composite material. The preparation method comprises the following steps: successively adding an acylate-phosphate compound, an acrylate active monomer and N-hydroxymethyl acrylamide into a container, and reacting for 2 hours at 90 DEG C; adding benzimidazole and polyamide wax, and reacting for one hour at 120 DEG C; adding nano titanium dioxide and sodium alginate, and reacting for 0.5 hour at 140 DEG C; naturally cooling to obtain a modifier; mixing the modifier, polyvinyl chloride resin, polyetherimide resin and ytterbium fluoride in a screw extruder, and extruding to obtain polyvinyl chloride composite particles; and performing calendaring molding on the polyvinyl chloride composite particles to obtain the self-moisture-absorption cold-forming polyvinyl chloride composite material for packaging the drugs. The self-moisture-absorption cold-forming polyvinyl chloride composite material solves the problems that the existing polyvinyl chloride transparent membrane is poor in adhesion and low in moisture absorption rate, can meet the requirement of the drug packaging industry and facilitates the prolonging of the drug quality guarantee period.

The invention relates to a heat-resistant electronic membrane and a preparation method thereof. The preparation method includes the steps that a mixture of silicon dioxide, ytterbium fluoride, magnesium oxide, calcium carbonate, zirconia and zirconia is subjected to ball milling and calcination, and filler is obtained; amine compound and the filler are mixed for one hour, then N-formyl morpholine, a nitrogen compound and sodium iodide are added and mixed for two hours, and a mixture is obtained; bi-isoprene bicyclo oxide and 2,6-bi-(4-aminophenoxy) cyanobenzene are sequentially added to the mixture and stirred for 5 minutes t the temperature of 170 DEG C, and a compound is obtained; the compound is added to an extruder; then, a polyimide film with the surface subjected to corona treatment passes through the extruder at the speed of 1 m/min, the compound is applied to the polyimide film obtained after treatment through an extrusion die head, and the composite polyimide film is obtained; the heat-resistant electronic membrane is obtained after the composite polyimide film is subjected to forming treatment. The preparation method is wide in raw material source, simple and controllable in preparation process, only conventional operation is needed, and industrialization is facilitated.

The invention relates to a wear-resistant composite material. According to the invention, ytterbium fluoride, thioacetamide and trimethylsilyloxy silicate are well mixed, such that a mixture is obtained; 1,3,5-triglycidyl-S-triazine trione and inorganic fiber are added into the mixture, and the mixture is stirred for 4h; an isocyanate curing agent is added, and the mixture is stirred for 2h under a temperature of 60 DEG C; a heat-resistant resin prepolymer and a high-viscosity resin prepolymer are added into the mixture, and the mixture is stirred for 6h under a temperature of 120 DEG C, such that a mold pressing composition is obtained; the mold pressing composition is placed into a mold, and is subjected to a mold pressing process with conditions of 150 DEG C/2h + 180 DEG C/1h, such that the wear-resistant composite material is obtained. With the preparation method provided by the invention, the sources of raw materials are wide; the preparation process is simple and controllable; and only conventional operations are required. Therefore, the method is easy to industrialize.

The invention discloses a visible infrared window antireflection film based on magnetron sputtering and a preparation method, and belongs to the technical field of optical films. A magnetron sputtering coating method is mainly used, a conventional situation that efficient antireflection films are made of ytterbium fluoride, zinc sulfide and other soft film materials with low hardness is abandoned, but yttrium oxide, titanium oxide, aluminum oxide and other hard oxide protective films are used, and the visible, low-light and infrared common-window high-strength antireflection film capable of being used for a zinc sulfide base is formed through design optimization. The reflectivity of the film system can be 5% within the wave band range of 0.4-0.75um and 1.57 um, the transmittance of the film system can be larger than 92% within the wave band range of 7.4-10.7um, the surface quality and the firmness of a film layer are good, and the film system can resist friction tests specified in GJB2485-95 and test requirements of temperature, damp heat, salt mist and the like specified in GJB150A-2009.

The present invention discloses a visible-infrared anti-counterfeiting coating and a preparation method and application thereof, the visible-infrared anti-counterfeiting coating comprises the following raw materials in parts by weight: 0.1-3% of a visible-infrared anti-counterfeiting composition, 1-3% of an anti-settling agent and 94-98.9% of ink or polyurethane paint or acrylate paint; and the visible-infrared anti-counterfeiting composition comprises sodium fluoride, fluoride yttrium and fluoride ytterbium. A visible-infrared anti-counterfeiting button prepared from the visible-infrared anti-counterfeiting coating may produce obvious bright spots visible to the naked eyes under infrared light irradiation, and has good anti-counterfeiting effect.

The invention discloses a visible infrared anti-counterfeiting mark, which comprises a base material, the base material is coated with a visible infrared anti-counterfeiting coating, and the raw material composition of the visible infrared anti-counterfeiting coating is as follows in weight percent: visible infrared anti-counterfeiting composition 0.1 -3%, anti-settling agent 0.3-1%, ink or polyurethane coating or acrylate coating 96-99.6%; the visible infrared anti-counterfeiting composition is composed of sodium fluoride, yttrium fluoride and ytterbium fluoride. The present invention adopts a specific visible infrared anti-counterfeiting coating, and the prepared buttons will produce obvious bright spots visible to the naked eye under the irradiation of infrared light with a specific wavelength of 980nm, and the bright spots can be recognized in fluorescent lamps and outdoors where light is not very strong , no need to be identified in a dark environment, and has a good anti-counterfeiting effect.