37 results about "Strontium fluoride" patented technology

The invention discloses an aramid fiber-ultrahigh molecular weight polyethylene composite sheet material processing method. The method comprises fiber impregnation, single fiber layer hot pressing and multiple composite layer hot pressing. First glue comprises a styrene-vinyl acetate copolymer, epoxy resin, terpene resin, polyethylene glycol, p-nitrotoluene and strontium fluoride. Second glue comprises a propylene-vinyl acetate copolymer, polystyrene, terpene resin, polyethylene glycol, 2,4-dimethylphenol and potassium metasilicate. Through improvement of the glue and use of a multi-ingredient composite formula, bonding strength and density of the glue to aramid fibers and polyethylene fibers are effectively improved, and composite sheet material toughness and shock resistance are improved. Through freezing and unfreezing of the fibers subjected to impregnation, glue inner stress and surface tension are effectively reduced. Through UV treatment on the fibers subjected to impregnation, glue and fiber bonding strength is improved and a composite sheet material service life is prolonged.

The invention discloses an infrared colorful false proof material and making method, which comprises the following steps: selecting certain proportional alumina, lead fluoride, beryllium fluoride, calcium fluoride, strontium fluoride, lanthanum fluoride, europium trioxide, samarium trioxide, thulium trioxide and gadolinium trioxide as raw materal; blending these raw materials; grinding; heating; insulating; heating again; quenching; cooling; grinding; packing. The spectral scale is broad to form 3-6 different colorful fluorescences stimulated by laser at 960nm, which is fit for falseproof marking material.

The invention discloses a method for preparing a strontium fluoride or rare-earth doped strontium fluoride film by adopting electrolytic deposition. The method comprises the following steps of: 1) cleaning an ITO conductive glass twice or thrice by using acetone, then cleaning the ITO conductive glass in an ultrasonic cleaner for 10 to 30 minutes by using deionized water, activating the ITO conductive glass for 10 to 30 seconds in 10 percent nitric acid solution, and cleaning the ITO conductive glass by using the deionized water for later use; 2) adding sodium ascorbate and ammonium fluoride solution into compound solution of 0.01 to 0.5mol/L ethylene diamine tetraacetic acid and strontium ions, and adjusting the pH value to be between 6 and 9 to obtain electrolyte for later use; and 3) placing the ITO conductive glass serving as a working electrode, a platinum electrode serving as a counter electrode and a calomel electrode serving as a reference electrode into the electrolyte to perform electrolytic deposition so as to obtain the strontium fluoride film at an anode deposition potential of 0.8V to 1.4V relative to the calomel electrode. The method has the advantages of simple equipment, low cost and normal-pressure low temperature, is suitable for scientific research, and is expected to realize large-scale industrialized production.

The invention discloses a rare earth doping fluozirconate luminescent material and a preparing method thereof.The chemical composition of the material is Sr(1-x)ZrF6: xRE3+, wherein RE can be Eu, Tb, Ce or Dy, and x is larger than or equal to 0.5% but smaller than or equal to 7.0%.The preparing method comprises the steps that solid strontium fluoride and rare earth oxide are accurately weighed according to a stoichiometric ratio and put into a reaction kettle liner, hexafluorozirconic acid and deionized water are added, stirring is conducted, the mixture is added into a reaction kettle, reaction is conducted at the temperature from 120 DEG C to 220 DEG C, and the micro-rodlike luminescent material crystallized in good condition is obtained.The material is low in phonon energy, the luminescent center is free of radiation and low in relaxation rate, and the luminescent efficiency is high.The material particles are disperse, do not unite and are beneficial to coated pipe application.The material is high in degree of crystallinity, the matrix is stable, and hydrolysis does not occur when the material is applied to a humid environment.The material can be applied to energy-saving lamps and high-pressure mercury lamps, the preparation technology is simple, and the requirement for equipment is low.

The invention discloses a coating for a tungsten-copper alloy material. The coating comprises a transition layer and an anti-oxidation layer formed on the surface of the alloy material in sequence, wherein the transition layer comprises the following raw materials in parts by weight: 15-20 parts of nano tin oxide, 10-15 parts of strontium fluoride, 0.1-0.5 part of tetrabutyl titanate and 1-5 parts of polyvinyl alcohol, and the anti-oxidation layer comprises the following raw materials in parts by weight: 10-20 parts of nano cerium oxide and 30-50 parts of silicon-barium-iron alloy powder. Two components of nano tin oxide and strontium fluoride are added into the transition layer so that the bonding strength of the transition layer is improved, and the porosity is reduced. The silicon-barium-iron alloy powder in the anti-oxidation layer reacts with oxygen in a high-temperature environment so that the alloy material is prevented from being oxidized at a high temperature, and the compactness of the anti-oxidation layer is improved through the nano cerium oxide. The invention further provides a preparation method of the coating for the tungsten-copper alloy material, the transition layer is prepared in a sintering mode, the anti-oxidation layer is sprayed to the surface of the transition layer through hypersonic flame, and it is guaranteed that the coating is uniformly distributed on the surface of the alloy material and does not easily crack or fall off.

The invention provides a method for preparing a strontium fluoride crystal. Strontium chloride is used as a strontium source reactant, ammonium fluoride or sodium fluoride is used as a fluorine source reactant, glycine is used as a biological regulating agent, and the strontium fluoride crystal is prepared. Strontium chloride, ammonium fluoride or sodium fluoride and a glycine solution are sequentially added into a communicated reaction container provided with a left ear groove, a right ear groove, a left barrier plate, a middle barrier plate and a right barrier plate, and after the reaction is finished, the product is filtered, washed and dried to obtain the strontium fluoride crystal. The purity of the prepared strontium fluoride crystal reaches 99.0%-99.9%, the yield reaches 99.0%-99.9%, and the purity and crystallinity are high. The method has the characteristics of simple process, mild reaction conditions, low energy consumption, low cost and the like.

The high-strength anti-cracking metal powder core type flux-cored wire for the engineering machinery comprises a steel belt and powder filled in the steel belt, and the powder comprises the following components in percentage by mass: 1.5-2.0% of silicon carbide, 10-14% of ferromanganese, 0.4-0.8% of silicon-barium alloy, 8-14% of nickel powder, 0-3% of ferrochromium, 1-4% of molybdenum powder, 0.3-0.4% of niobium-zirconium alloy, 0.2-0.5% of strontium fluoride, 0.2-0.5% of arc stabilizer and the balance of iron powder. And the balance of iron powder. The metal powder core type flux-cored wire has the excellent comprehensive mechanical properties of high strength, high toughness and the like, the tensile strength of the metal powder core type flux-cored wire is larger than or equal to 780 MPa, the yield strength of the metal powder core type flux-cored wire is larger than or equal to 670 MPa, and the impact energy at-50 DEG C is larger than or equal

The invention relates to orange-red rear-earth phosphors and a preparation method thereof. The orange-red rear-earth phosphors are prepared from strontium carbonate, calcium chloride, strontium chloride hexahydrate, strontium fluoride, strontium bromide, aluminum hydroxide, boric acid and europium oxide serving as raw materials by adopting a high-temperature solid state method. The preparation method comprises the following steps of: uniformly mixing the raw materials according to proportions, pre-sintering for 3-6 hours at 400-500 DEG C, cooling to a room temperature, taking out the raw materials and uniformly grinding again, reducing and sintering at a CO atmosphere for 4-10 hours at 1000-1200 DEG C, and grinding fine obtained sinters to obtain final products. The orange-red rear-earth phosphors have high luminous efficiency, good stability and very high quenching temperature and are suitable for InGaN chips giving out ultraviolet lights with about 400nm wavelength.

The invention relates to a high-temperature anti-sticking coating capable of catalytically decomposing dioxins. The high-temperature anti-sticking coating is prepared from the following components in percentage by weight: 35 to 70 percent of a ceramic filler, 15 to 55 percent of a binder and 0.5 to 5 percent of Yb/Tm co-doped fluoride nanocrystal. In the Yb/Tm co-doped fluoride nanocrystal, in terms of 100 mol% of fluoride, the doping amount of Tm is 0.1 to 2 mol%, and the doping amount of Yb is 0.5 to 5 mol%; the average particle size of the nanocrystal is 20-100 nm, and the nanocrystal can absorb visible light or infrared light and convert the visible light or infrared light into ultraviolet light. The characteristic that Yb/Tm co-doped fluoride nanocrystals absorb visible light/infrared light to generate up-conversion luminescence is utilized, purple light emission is achieved, then the photolysis reaction of dioxins is caused, and visible light and infrared light radiation generated by incineration of the incinerator is also recycled to a certain extent. Fluoride is selected from calcium fluoride, barium fluoride and strontium fluoride, is not only a good luminescent material matrix, but also a good lubricating material, and has a remarkable effect on the anti-bonding performance of the coating.

The invention discloses a preparation method for a strontium fluoride optical material with a composite structure. The preparation method comprises the following specific steps: 1) synthesizing pure strontium fluoride (SrF2) powder by adopting a chemical precipitation method, and mixing the SrF2 powder with rare earth fluoride ReF3 powder; 2) carrying out primary molding on obtained mixed powder,and carrying out isostatic cool pressing treatment so as to obtain a green body with a composite structure; 3) putting the green body into a mold, and putting the mold into a vacuum furnace for pressurization sintering; and 4) after sintering is finished, taking a sample out of the vacuum furnace, and carrying out polishing treatment so as to obtain the strontium fluoride optical material with thecomposite structure. Compared with a conventional single-structure strontium fluoride optical material in which components including strontium fluoride crystals and ceramics are uniformly distributed, the strontium fluoride optical material with the composite structure provided by the invention has the following advantages: through the design of the composite structure, the thermal conductivity of the optical material can be improved; generated heat can be conducted out of the body more quickly in laser application; the thermal effect of the optical material is relieved; and the strontium fluoride optical material is more competitive in application in the fields of high-power laser technology and the like.