33 results about "Europium(III) oxide" patented technology

The invention provides a titanium dioxide (TiO2) photocatalysis composite film and a preparation method thereof. The titanium dioxide (TiO2) photocatalysis composite film is generated in situ on a titanium alloy (Ti-6Al-4V) substrate by adopting a micro-arc oxidation (MAO) method, the film contains grains of rare earth oxides of europiumsesquioxide (Eu2O3) in a one-dimensional structure, and the film has the crystalling phase of anatase. Eu2O3 grains have the effect of catalysts or catalyst accelerators in the TiO2 photocatalysis composite films, and the compounding time of TiO2 photo-induced electrons and hole pairs can be prolonged in the photocatalysis process, so the optical photon yield can be improved. The invention is applied to the photocatalysis purification field. Compared with uncompounded TiO2 films, the TiO2 photocatalysis composite film of the invention has the advantages that the absorption efficiency on ultraviolet light and visible light is obviously improved, the degradation efficiency of the organic pollution can be improved by about one time.

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 preparation method of a germanate glass luminescent film. The method comprises the following steps: selecting zinc oxide, lead oxide, germanium oxide and silicon dioxide as glass substrate and selecting manganese oxide and europium sesquioxide as luminescent agents; dissolving tetraethoxysilane in absolute ethyl alcohol and dissolving other oxides in a nitric acid solution to prepare a 0.5-1.5mol/L nitrate solution; mixing the solution, stirring and adding a certain amount of citric acid as a chelating agent; regulating pH to 0.5-1 to prepare sol; atomizing the prepared sol at a nozzle of a spray gun by high pressure gas to allow deposition on a high-temperature quartz glass substrate to form uniform film; keeping the formed film at constant temperature of 500 DEC C for 2-5h; meanwhile, charging a gas mixture of nitrogen and hydrogen into a heating furnace as reducing atmosphere to finally obtain colorless transparent glass film which can emit bright red fluorescence in the presence of 254nm ultraviolet irradiation.

The invention discloses a preparation method of titanium dioxide europium-doped nano-film sol. In the method, metatitanic acid (H2TiO3) is washed by distilled water repeatedly, and put into an oven to be baked for 12 hours at 60 DEG C; europium sesquioxide (Eu2O3) is dissolved in nitric acid to obtain europium ion; H2Ti3 and K2CO3 are evenly mixed according to mol ratio of 5.2:1, europium ion is added into the mixture according to 0.2-3% of mass fraction of titanium, and little absolute ethyl alcohol is added into the mixture simultaneously, the mixture being fully ground is put in a muffle to be calcined for 6-15 hours at 600-1000 DEG C, the material being calcined is taken out and added into hydrochloric acid of 1mol/L according to the proportion of 4g/L to be stirred, filtration washing is carried out for 24-72 hours, the filter cake is added into 4-n-butyl ammonium hydroxide or ethylene dimine according to the proportion of 0.4g/L to be stirred for 24-72 hours, is then centrifugated at the high speed centrifugation of 10000r/min to obtain titanium dioxide europium-doped nano-film sol. The invention is convenient in operation, low in cost and suitable for industrialized prosuction.

The invention discloses a preparation method of Eu2O3-Dy2O3-codoped zinc-silicon-system microcrystalline glass. According to the preparation method, zinc oxide, boric acid, silicon dioxide, aluminum trioxide, sodium carbonate, titanium oxide, dysprosium trioxide, and europium trioxide are adopted as raw materials; the raw materials are grinded and mixed; the mixture is fused under a temperature of 1400-1500 DEG C, and glass is molded and prepared; the molded glass is annealed for 2-3h under a temperature of 500-600 DEG C, such that internal stress is eliminated, and the glass is cooled to room temperature; the annealed glass is subjected to a crystallization treatment, wherein the glass is nucleated for 2-5h under a temperature of 550-650 DEG C and crystallized for 6-12h under a temperature of 750-800 DEG C, such that the zinc-silicon-system luminescent microcrystalline glass is obtained. The method provided by the invention has the advantages of short production period and low cost. The prepared luminescent microcrystalline glass has the advantages of high luminous efficiency, high uniformity, long service life, energy saving, and environment-friendliness. When the glass is used in LED lamps, cost is reduced, and luminescent performance is improved.

The invention discloses an agricultural daylight greenhouse orange light conversion membrane. A monobasic complex crystal is prepared from a nitric acid solution and europium oxide, industrial ethanol is added into the monobasic complex crystal so that an europium monobasic complex is obtained, phenanthroline is added into the europium monobasic complex so that an europium dibasic complex is obtained, the europium dibasic complex slurry is put into a vacuum suction filter and then is subjected to pumping filtration so that europium complex powder is obtained, the europium complex powder, a plastic fluorescent dye and linear low density high pressure polythene are subjected to wet processing, the product is subjected to water grinding, phase inversion, water washing and drying to form color master batches, and the color master batches are added into a middle layer of a polythene or polyolefin film according to a ratio of 2.5% so that a light conversion greenhouse film is produced. The agricultural daylight greenhouse orange light conversion membrane realizes light wave transition and promotes plant growth.

The invention provides a solid thermoluminescence dosimeter, relating to the following chemical formula: Sr2P2O7:xEu<2+>, yPr<3+>. The raw materials strontium hydrogen phosphate, ammonium dihydrogen phosphate, europium oxide and praseodymium oxide are weighed according to dosage ratio, grinded, mixed uniformed and filled in a roasting vessel; the roasting vessel is then placed in a high-temperature furnace under the sintering atmosphere of CO gas, H2 gas or the mixed gas of N2 and H2 and sintered at the temperature of 900-1400 DEG C for 3-6 hours, thus obtaining target material. After being radiated by Gama-ray, the thermoluminescence curve is single peak with the peak temperature of 439.5K; the thermoluminescence sensitivity is 4.6 times of dosimeter (LiF:Mg, Cu, P) which is widely used at present and has the highest sensitivity; furthermore, the solid thermoluminescence dosimeter material has good linearity at the dosage response of the thermoluminescence at 100-1000mGy and is a good thermoluminescence dosimeter material.

A preparation method of a solar cell down-conversion material YVO4:Eu3<+> nanopowder comprises the following steps: weighing yttria (Y2O3) and europium(III) oxide (Eu2O3) according to a molar ratio of 1:1, mixing, adding the obtained mixture to nitric acid, and dissolving Y2O3 and Eu2O3 to obtain a clarified solution containing yttrium ions and europium ions; adding ammonium metavanadate (NH4VO3) to the clarified solution according to a molar ratio of ammonium metavanadate to the above metal ions of 1:1; adding a citric acid solution with the concentration of 1.4-1.6mol/L to make a molar ratio of citric acid to the metal ions reach 2:1; taking a quantitative amount of ammonia water, and slowly adding the quantitative amount of ammonia water to the above obtained citric acid-containing solution; adding a certain amount of a dispersing agent, and aging for a period of time to obtain a sol; and heating the sol to obtain xerogel, and grinding the xerogel to obtain the YVO4:Eu3<+> nanopowder.

The invention discloses a formula for producing a low-cost ultrahigh-speed heat-conducting LED die-cast aluminum radiator. The low-cost ultrahigh-speed heat-conducting LED die-cast aluminum radiator comprises, by weight, 1%-10% of tin, 1%-10% of magnesium, 1%-10% of zinc, 0.5%-3% of nano-europium oxide, 0.5%-3% of nano-terbium oxide, 0.1%-1% of raney nickel catalysts and the balance aluminum. Compared with an existing cast-aluminum radiator which is high in price and contains precious metal or alloy materials on the market, the LED die-cast aluminum radiator produced through the formula has the same or higher heat conduction coefficient and is lower in cost; the LED die-cast aluminum radiator has extremely high market advantages and market competitiveness under the combined action of the two advantages.

A color-changing coating for copper comprises the components in parts by mass as follows: 100 parts of potassium iodide, 15-30 parts of nitric acid, 15-20 parts of cupper nitrate, 15-25 parts of strontium nitrate, 25-45 parts of aluminum nitrate, 10-25 parts of mercury nitrate, 10-20 parts of silver nitrate, 5-10 parts of europium oxide, 10-20 parts of dysprosium oxide, 10-15 parts of ammonium carbonate, 5-10 parts of ammonium bicarbonate, 15-25 parts of sulfur dioxide and 10-20 parts of water. The color-changing coating turns red from orange at the temperature of 35 DEG C, turns orange yellow from red at the temperature of 40 DEG C, turns orange red from orange yellow at the temperature of 45 DEG C and turns brown from orange red at the temperature of 50 DEG C.

The invention relates to the technical field of fluorescent powder preparation and relates to a fluorescent powder capable of exciting white light emission and suitable for ultraviolet LED and a preparation method thereof. The method comprises the following steps: S1) respectively weighting sodium carbonate, barium carbonate, ammonium dihydrogen phosphate or diammonium hydrogen phosphate, europiumoxide and manganese carbonate at mole ratio of 0.5:(0.995-x):1:0.0025:x, milling and uniformly mixing, thereby acquiring a mixture; S2) putting the mixture into a high temperature furnace under a reducing atmosphere, standing by and reacting, thereby acquiring an initial product of fluorescent powder; S3) cooling the initial product of fluorescent powder and then milling, thereby acquiring an endproduct of fluorescent powder with a chemical formula of NaBa1-x-yPO4:Eu2+y-Mn2+x and used for coating an ultraviolet LED chip. The fluorescent powder prepared according to the invention is a singlesubstrate white light fluorescent powder, so that the re-absorption problem of multi-powder combining schemes can be avoided. Phosphate is served as the substrate of the fluorescent powder, so that the heat stability is high, the defect of color drifting phenomenon during use process caused by different heat stabilities of different powders can be further avoided, and the purposes of enhancing thestability of fluorescent powder and increasing the luminous efficiency can be achieved.

The invention discloses radiating type lighting LED lamp glass which is prepared from the following raw materials in parts by weight: 10 to 30 parts of silicon dioxide, 25 to 45 parts of europium oxide, 10 to 30 parts of potassium carbonate, 15 to 35 parts of lauric acid, 10 to 40 parts of glass powder, 5 to 25 parts of glass fiber, 2 to 10 parts of binder, 5 to 15 parts of photo-diffusion powder, 3 to 13 parts of antifog additive and 4 to 16 parts of heat conduction powder. The radiating type lighting LED lamp glass has the advantages of convenient processing technology and long service life.

The invention discloses non-stoichiometric oxynitride nano powder and a preparation method thereof. The preparation method comprises the following steps: firstly, dissolving europium oxide powder, tantalum pentoxide powder and urea in absolute ethyl alcohol, carrying out ball milling to obtain mixed slurry, drying the mixed slurry to obtain mixed precursor powder, calcining the mixed precursor powder in a protective atmosphere to obtain EuTa(O, N)3 oxynitride nano powder, and carrying out ammonification annealing treatment on the EuTa(O, N)3 oxynitride nano powder in an ammonia atmosphere to obtain the oxynitride nano powder EuTaOaNb with the non-stoichiometric ratio, wherein a is more than or equal to 1.5 and less than or equal to 2.5, b is more than or equal to 0.5 and less than or equal to 1.5, and a:bis not equal to 2:1. According to the invention, the method has the advantages of low cost, simple process, high product purity and the like, and the prepared product is good in dielectric property and magnetism.

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 discloses a ceramic for heat-resistant we-resistant nozzles. The ceramic is prepared from the following raw materials in parts by weight: 3-5 parts of europium oxide, 2-3 parts of dysprosium oxide, 4-7 parts of kyanite, 1-1.5 part of cadmium carbonate, 1-2 parts of sodium peroxide, 20-25 parts of quartzite, 22-27 parts of albite, 10-14 parts of nano titanium boride, 5-8 parts of nano tungsten carbide, 1-2 parts of sodium hydroxide, appropriate amount of deionized water, 3-4 parts of ethyl orthosilicate, appropriate amount of ethyl alcohol and 4-6 parts of an assistant. By adding europium oxide, dysprosium oxide, nano titanium boride and nano tungsten carbide, the hardness, the wear resistance and the heat resistance are improved, and the service lives of the nozzles produced by the ceramic is 2-3 times longer than the aluminum alloy nozzles; and by using the assistant, the surface smoothness, the wear resistance and the heat resistance of the ceramic can be improved.

The non-radioactive environment protecting energy storage luminous ceramic glaze material is prepared with strontium carbonate, Al2O3, boric acid, Eu2O3, Dy2O3, borax, quartz, niter, limestone, talcum and sodium fluorosilicate, and through mixing and other steps. It has the advantages of no radioactivity and long luminous time.