67 results about "Thulium oxide" patented technology

The invention relates to a rare earth thulium-doped aluminate fluorescent glass, and the weight proportions of the compositions are as follows: 22% to 28% of Al2O3; 30% to 37% of CaCO3; 36% to 44% of H3BO3; and 0.5% to 1.5% of Tm2O3; the preparation method is as follows: (1) extra pure reagents alumina, calcium carbonate and boric acid are weighed, and the weight percentages are respectively as follows: 22% to 28%; 30% to 37%; 36% to 44%; 0.5% to 1.5%; thulium oxide is weighed so that the ratio between the weight of thulium oxide and the total weight of the three master batches is between 0.5% and 1.5%; fluxing agent accouting for 1% to 2% of the total weight of the four extra pure reagents is weighed, and the compositions are fully mixed; (2) the mixture is loaded in a corundum crucible and is sintered in a high temperature furnace, the atmosphere is air, the sintering temperature is 1100 to 1400 DEG C, and the sintering time is 2 to 5 hours; (3) sinter is processed in an annealing furnace at the temperature of 450 to 550 DEG C, and the processing time is 30 to 60 minutes; (4) the sinter is reduced to room temperature in air, cut into required length, washed by deionized water at the temperature of 70 to 85 DEG C, and dried at the temperature of 120 to 150 DEG C, so that the required product is obtained.

A new ytterbium-phosphate glass and a method for producing the same are disclosed. The glass finds special use in forming laser glass. Previously the level of ytterbium that could be incorporated into a phosphate glass without leading to formation of crystals or devitrification was limited. It has been found that much higher levels of ytterbium can be incorporated if an initial glass melt is formed from phosphate and ytterbium prior to adding the other components. Using the present process ytterbium-phosphate glasses having up to 30 mole percent ytterbium can be created. The new glasses function as well and often better than previous ytterbium containing glasses as laser glasses especially when combined with one or more of the lasing ions erbium oxide, neodymium oxide, holmium oxide or thulium oxide.

The invention discloses an ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal and a preparation method thereof, relating to dodecacalcium heptaluminate polycrystal and a preparation method thereof, and solving the technical problem that the conventional blue material does not contribute to application due to wide blue wavelength distribution. The ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal is prepared from calcium oxide, aluminum oxide, ytterbium oxide and thulium oxide, wherein the molar ratio of the calcium oxide to the aluminum oxide is 12:7; the amount of substance of the ytterbium oxide is 0.042-0.42 percent of that of the calcium oxide; and the amount of substance of the thulium oxide is 0.042-0.21 percent of that of the calcium oxide. The method comprises the following steps of: grinding the calcium oxide, the aluminum oxide, the ytterbium oxide and the thulium oxide powder; sheeting; and sintering under an air atmosphere to obtain the ytterbium and thulium codoped dodecacalcium heptaluminate polycrystal. Single blue light emission with wavelength of 460-490nm is obtained under excitation of light with wavelength of 980nm. The polycrystal can be used in the fields of light storage technology, optoelectronic technology, sensor technology and submarine optical cable communication.

The invention discloses a preparation method of a rare earth modified pressure-sensitive material. The preparation method comprises the following steps: adding one or a combination of lanthanide series rare earth oxides in CaCu3Ti4O12 powder, wherein the total mass of added rare earth oxides is 0.01-9% of the mass of CaCu3Ti4O12 powder, and the lanthanide series rare earth metal oxides comprise lanthanum oxide, cerium oxide, praseodymium oxide, neodymium oxide, promethium oxide, samarium oxide, europium oxide, gadolinium oxide, terbium oxide, antimony oxide, holimium oxide, erbium oxide, thulium oxide, ytterbium oxide and lutetium oxide; and the rare earth modified CaCu3Ti4O12-based ceramic with good pressure-sensitive characteristic can be prepared by the process steps of ball milling, pelleting, forming, dewaxing, and high-temperature sintering. In the preparation method, since rare earth oxides are introduced to a crystal boundary, on one hand, the microscopy topography of the CaCu3Ti4O12-based pressure-sensitive material is regulated, and on the other hand, the electric property of the crystal boundary of the CaCu3Ti4O12-based pressure-sensitive material is changed, thereby reducing the leakage current of the material and improving the pressure-sensitive characteristic of the material so that the pressure-sensitive material reaches commercial requirements.

This invention discloses a method for preparing frequency up conversion material. The method comprises: adding concentrated HNO3 into yttrium oxide, ytterbium oxide and erbium oxide (or thulium oxide), heating to dissolution in a water bath to obtain yttrium nitrate solution, ytterbium nitrate solution and erbium nitrate solution (or thulium nitrate solution), mixing to obtain mixed solution A, adding glycine to obtain mixed solution A1, placing mixed solution A1 in a furnace, cooling to obtain white powder A2, adding NaF and NH4F to obtain mixture A3, placing mixture A3 in a furnace, and performing thermal treatment to obtain the target product. Compared with hydrothermal method, the method in this invention has such advantages as low thermal treatment temperature and short reaction period. The synthesized sample has such advantages as small and uniform sizes, no need for grinding, regular morphology and high luminescent efficiency.

The invention relates to the technical field of cutting tools, in particular to a preparation process of self-lubricating ceramic material cutting tools, which is characterized in that the process steps are: (1) Nano-thulium zirconium ceramic powder prepared by hydrothermal precipitation method, its composition The content and mass percentage are: 7% to 38% of thulium oxide, 62% to 93% of zirconia, (2) after adding TiC composite, ball milling, (3) adding solid lubricant, the radius of the solid lubricant particle ceramic composite material The ratio is 0.225≤r/R≤0.419, (4) mixed after ball milling, (5) vacuum dried, (6) put into graphite mold, (7) prepared by hot pressing sintering process, and the sintering temperature is 1500°C-1700°C , holding time 40 minutes. Compared with the prior art, the present invention has a simple technological process, and the self-lubricating ceramic tool has the functions of anti-friction, anti-wear and lubrication, saves the cooling and lubrication system, reduces equipment investment, avoids environmental pollution caused by cutting fluid, and realizes clean production. reduce manufacturing cost.

The invention discloses near-infrared light emitting lanthanum oxysulfide fluorescent powder and a method for preparing the same. A chemical formula of the near-infrared light emitting lanthanum oxysulfide fluorescent powder is (La<x>Yb<y>Tm<z>)<2>O<2>S. The sum of the x, the y and the z is equal to 1, the x is larger than or equal to 0.7 and is smaller than or equal to 0.98, the y is larger thanor equal to 0.01 and is smaller than or equal to 0.2, and the z is larger than or equal to 0.01 and is smaller than or equal to 0.1. The method includes adding distilled water into lanthanum oxide powder, ytterbium oxide powder and thulium oxide powder; stirring and heating the lanthanum oxide powder, the ytterbium oxide powder and the thulium oxide powder to obtain liquid, and dropwise dropping concentrated nitric acid until the liquid is clear; preparing lanthanum nitrate solution, ytterbium nitrate solution and thulium nitrate solution with corresponding concentration; mixing the lanthanumnitrate solution, the ytterbium nitrate solution and the thulium nitrate solution with one another according to proportions to obtain mixed solution; adding ammonium sulfate particles into the mixed solution and stirring the ammonium sulfate particles and the mixed solution until the mixed solution is clear; adding ammonia water into the mixed solution, regulating the pH (potential of hydrogen), and stirring the mixed solution to obtain uniform suspension; carrying out reaction at the temperatures for the time under the control; separating and drying products and calcining the products in hydrogen to obtain the near-infrared light emitting lanthanum oxysulfide fluorescent powder. The near-infrared light emitting lanthanum oxysulfide fluorescent powder and the method have the advantages that nearly pure near-infrared light (with the lengths of 802nm) can be emitted by the near-infrared light emitting lanthanum oxysulfide fluorescent powder prepared by the aid of the method, stray lightpositioned in visible light regions nearly can be completely quenched, and accordingly the color purity and the mark signal strength can be advantageously improved.

The invention relates to a performance controllable silicon nitride ceramic implant and a preparation method of the implant. The implant comprises silicon nitride and additives, wherein the additivescomprise a first additive, a second additive and a third additive; the first additive is one or a mixture of more than one of magnesium oxide, aluminum oxide, yttrium oxide, strontium oxide, cerium oxide, chromic oxide, titanium carbide, titanium nitride and boron nitride; the second additive is one or a mixture of more than one of erbium oxide, thulium oxide, ytterbium oxide and lutetium oxide; and the third additive is one or a mixture of more than one of praseodymium oxide, samarium oxide, cerium dioxide, neodymium sesquioxide and calcium titanate. An outer layer of the implant mainly comprises alpha phase silicon nitride; the interior of the implant mainly comprises beta phase silicon nitride, so that the implant achieves an effect of the hard surface and the tenacious interior; the hardness and wear resistance as well as fracture toughness and strength of the implant can be improved; cracks are resisted; and corresponding damage risks are reduced.

The invention discloses rare-earth ion doped mayenite polycrystalline powder with up-conversion photochromic adjustability. The rare-earth ion doped mayenite polycrystalline powder is prepared by grinding calcium carbonate, aluminum oxide, ytterbium oxide, thulium oxide and erbium oxide, calcining at 1320-1420 DEG C, cooling and then grinding. The molar ratio of aluminum oxide to calcium carbonate is 7:12; the doping molar concentration of tterbium oxide is 0.5-1.5%; the doping molar concentration of thulium oxide is 0.25-0.5%; and the doping molar concentration of erbium oxide is 0.25-1.5%. The doped mayenite polycrystalline powder is good in dispersity and has the photochromic adjustability, and adjustment of green light-yellow light-red light can be achieved through adjusting the doping concentration and the proportional relationship of aluminum oxide, the ytterbium oxide and the thulium oxide under the excitation of 980nm infrared light.

The invention relates to a color matching composition, a zirconia ceramic raw material composition, a zirconia ceramic and a preparation method of the zirconia ceramic. The color matching compositionis used for adjusting the color of the zirconia ceramic and is characterized by comprising a first component, a second component and a third component; the first component is copper oxide, the secondcomponent is chosen from at least one of aluminum oxide, thulium oxide and neodymium oxide; the third component is chosen from at least one of cerium oxide, zinc oxide, calcium oxide, cobaltous oxide,magnesium oxide, strontium oxide, titanium oxide and praseodymium oxide, wherein the mass ratio of the first component to the second component to the third component is (0.001-5):(0.001-20):(0.001-20). The color matching composition can be applied to the sapphirine zirconia ceramic obtained in the zirconia ceramic.

The invention discloses a preparation method of rare earth modified high-intensity non-woven fabrics. The preparation method comprises the following operating steps of (1) adding lutecium chloride andthulium chloride to water, then continuing adding sodium napthionate to the water, performing uniform mixing and stirring so as to obtain a mixture, raising the temperature of the mixture, and performing heat preservation so as to obtain rare earth naphthenates; (2) uniformly mixing the rare earth naphthenates with nanometer lutecium oxide, nanometer thulium oxide, sodium methallyl sulfonate andethylenediamine base propanesulfonate so as to obtain resin modifying agents; and (3) uniformly mixing polybutylene terephthalate slices with the resin modifying agents and a flow modifier to obtain anew mixture, adding the new mixture to a slice pelleting machine, performing co-mixing and granulation to obtain PBT master batches, adding the PBT master batches and the polybutylene terephthalate slices to dissolving and spraying equipment in the mass ratio of the PBT master batches to the polybutylene terephthalate slices being 1 to (15-20), and performing melt spinning and knitting so as to obtain the rare earth modified high-intensity non-woven fabrics. The non-woven fabrics prepared by the preparation method disclosed by the invention have good mechanical properties, and can be used under various high-intensity conditions.

The invention relates to a preparation method of a rhododendron culture medium. The preparation method comprises the steps of mixing 20-25 parts by weight of vermiculite, 30-35 parts by weight of pearl sand, 10-15 parts by weight of river sand and 10-12 parts by weight of coal slag, adding 0.1 part by weight of thulium oxide and 1 part by weight of carbendazim, uniformly mixing, covering the mixture for 1-2 days by virtue of a plastic film, flushing the mixture for 3-5 times by virtue of clean water, uniformly mixing the aired mixture by virtue of 0.4% compound fertilizer liquid, and covering the mixture for 30-45 days by virtue of the plastic film, so as to obtain the rhododendron culture medium. The preparation method has the advantages of available raw materials, low cost, environmental friendless, convenient use and good effect.

The invention discloses a method for synthesizing a rare earth Tm-doped CdTe:Tm quantum dot by a hydrothermal method. The preparation method comprises the following operation steps: injecting a previously prepared NaHTe solution in a previously prepared mixed solution of cadmium salt, thulium oxide and a water-soluble N-acetyl-L-cysteine modifier under nitrogen protection to obtain a rare earth Tm-mixed CdTe precursor solution, then putting the precursor solution in a hydrothermal reaction kettle for reaction to prepare the rare earth Tm-doped CdTe:Tm quantum dot with adjustable fluorescence emission wavelength and high fluorescence quantum yield. The hydrothermal method has the advantages of low cost, simplicity and convenience in operation, environmental protection and the like. The obtained rare earth Tm-doped CdTe:Tm quantum dot has the advantages of excellent fluorescence performance, great biologic compatibility and low toxicity and can be widely used in the fields of biochemical analysis and biomedicine as a novel fluorescent nanometer probe.

The invention relates to a solvothermal synthesis method of Lu2O3 nanorod luminescent powder and relates to the rare earth nanometer material preparation and the microstructural regulation and control thereof. The method comprises the following steps: adopting commercial rare earth oxides (lutecium oxide, europium oxide, neodymium oxide, praseodymium oxide and thulium oxide) as raw materials, separately dissolving the raw materials in concentrated nitric acid, diluting, preparing Lu(NO3)3 solution doped with a defined concentration of RE(NO3)3 (RE is one of Eu, Tb, Nd, Pr and Tm) solution, then dropping ammonia water to react and generate precipitate, mixing the precipitate and solvents with different components and properties, placing the mixtures in a sealed reaction tank to perform solvothermal reaction at 100-300 DEG C and synthesize lutetium-based precursor products with different features; and further calcining precursor power at 400-1000 DEG C for 1-3 hours to prepare the Lu2O3 nanorod luminescent powder. The method of the invention has simple and practical process, the feature of the product can be conveniently controlled by adjusting the type of solvent during the solvothermal process, and Lu2O3 nanorod powder can be obtained.

The invention discloses an extraction and purification method for a thulium oxide. The method comprises the steps of preparation of liquid to be purified, intermediate agent preparation, separation column preparation, elution column transformation, adsorption operation, elution ion exchange operation, collection of liquid according to the volume for sampling analysis, concentrated sedimentation, mixing and collection, waste liquid processing and the like. The existing roughly-processed collected low-purity thulium oxide is purified again, and the purity of the thulium oxide reaches 99.995%-99.99999%.

The invention relates to the cell field, which is a Ni-MH high-temperature cell with ultra high capacity. The invention provides a Ni-MH high-temperature cell with ultra high capacity worked under high power and high capacity condition. The technical solution adopted in the invention is: a Ni-MH high-temperature cell with ultra high capacity which comprises anode based on Ni(OH)2, a septum and alkalescency electrolyte, an additive added into the anode for preventing oxygen separating out and bearing high temperature in anode material. The additive is a mixture of calcium oxide, thulium oxide and titanium oxide. The invention is characterized in excellent performance of high temperature electrification and high power.

The invention discloses a method for preparing rare earth ion Tm<3+> and ZnO nanocrystalline codoping alumina silicate glass. The method comprises the following steps: firstly mixing silicon oxide, aluminum oxide, potassium carbonate, zinc oxide and thulium oxide, heating and melting the mixture, and pouring the molten mixture on a copper plate or a graphite plate to cool to room temperature, thereby obtaining quenched glass, wherein the mole rate of the silicon oxide to the aluminum oxide to the potassium carbonate to the zinc oxide to the thulium oxide is 44:11:10:35:(0.005-0.05); keeping the temperature of the quenched glass, thereby obtaining annealed glass; and performing a heat treatment on the annealed glass, thereby obtaining the rare earth ion Tm<3+> and ZnO nanocrystalline codoping alumina silicate glass. The method for preparing the rare earth ion Tm<3+> and ZnO nanocrystalline codoping alumina silicate glass, provided by the invention, has the advantages of simple and convenient process and low cost, and the prepared products can achieve common emission of white lights.