2867 results about "Rare earth ions" patented technology

A process for dewaxing waxy hydrocarbonaceous materials, such as hydrocarbon fuel and lubricating oil fractions to reduce their cloud and pour points comprises reacting the material with hydrogen in the presence of a dewaxing catalyst comprising at least one metal catalytic component and ferrierite in which at least a portion of its cation exchange positions are occupied by one or more trivalent rare earth metal cations. The rare earth ion exchanged ferrierite catalyst has good selectivity for lubricating oil production, particularly when dewaxing a Fischer-Tropsch wax hydroisomerate. Preferably at least 10% and more preferably at least 15% of the ferreirite cation exchange capacity is occupied by one or more trivalent rare earth metal cations.

This invention discloses a rare earth Y molecular sieve and preparation; wherein, the rare earth content is 12~22 w.t% considering the quantity of rare earth oxide in molecular sieve, all rare earth ion is in molecular sieve small cage; there is no peak at 0ppm in 27Al M AS NMR spectrogram. The step to obtain molecular sieve comprises: exchanging NaY molecular sieve liquid with ammonium salt or not, taking ion exchange with rare earth chloride by weight ratio of NaY dry basis:RECl3=1:0.17~0.35 at temperature 5~100Deg; pH=2.5~7.5, water: NaY=3~50; adjusting pH value to 8~11 with alkaline solution; mixing, filtering, cleaning, drying; baking for more than 0.1h with 0~100% vapor at temperature 200~950Deg; then, dealing with the molecular sieve according to weight ratio molecular sieve dry basis: ammonium salt :water=1:0~1:2~50 at temperature 60~100Deg; finally, cleaning, filtering, drying and obtaining the product.

Structure and method for growing crystalline superlattice rare earth oxides, rare earth nitrides and rare earth phosphides and ternary rare-earth compounds are disclosed. The structure includes a superlattice having a plurality of layers that forming a plurality of repeating units. At least one the layers in the repeating unit is an active layer with at least one species of rare earth ion.

High density oxide films are deposited by a pulsed-DC, biased, reactive sputtering process from a titanium containing target to form high quality titanium containing oxide films. A method of forming a titanium based layer or film according to the present invention includes depositing a layer of titanium containing oxide by pulsed-DC, biased reactive sputtering process on a substrate. In some embodiments, the layer is TiO2. In some embodiments, the layer is a sub-oxide of Titanium. In some embodiments, the layer is TixOy wherein x is between about 1 and about 4 and y is between about 1 and about 7. In some embodiments, the layer can be doped with one or more rare-earth ions. Such layers are useful in energy and charge storage, and energy conversion technologies.

The present invention discloses a process for making rare earth (RE) doped optical fibre by using RE oxide coated silica nanoparticles as the precursor materia, more particularly the method of the present invention involves preparation of stable dispersions (sol) of RE oxide coated silica nanoparticles at ambient temperature and applying a thin coating on the inner surface of silica glass tube following dip coating technique or any other conventional methods, of the said silica sol containing suitable dopants selected from Ge, Al, P, etc., the coated tubes were further processed into optical preforms by following MCVD technique and fiberised in desired configuration, the novelty lies in eliminating the step of the formation of porous soot layer at high temperature by CVD process inside a fused silica glass tube for formation of the core and also in the elemination of the incorporation of the rare earth ions into the porous soot layer following the solution doping technique or other conventional methods, the direct addition of RE oxides in the sol eliminates the formation of microcrystalites and clusters of rare earth ions and prevents change in composition including variation of RE concentration in the core which results in increase in the reproducibility and reliability of the process to a great extent, further the addition of Ge(OET)4 at ambient temperature in the silica sol reduces the quantity of GeCl4 which is required at high temperature to achieve the desired Numerical Aperture.

This invention discloses a method for raising rare earth content in super-stable Y-type zeolite. The method comprises: mixing super-stable Y-type zeolite and 0.01-2 N acid solution at a liquid / solid ratio of 4-20 at 20-100 deg.C, treating for 10-300 min, washing, filtering, adding rare earth salt solution for rare earth ion exchange, washing, filtering, and drying to obtain rare earth reinforced super-stable Y-type zeolite. The obtained rare earth reinforced super-stable Y-type zeolite has through pores without any blockage, and has obviously raised rare earth content. Cracking catalyst containing the rare earth reinforced super-stable Y-type zeolite as the active component has high heavy oil conversion ability.

The invention is a catalytic cracking catalyst to reduce sulfur content of gasoline and its preparing method, synthesis gama-type molecular sieve by kaoline in-situ crystallization and making exchange sodium reduction or / and rare-earth ion exchange processing to prepare it, and its characteristic: the weight percent of sodium oxide contained in it is less than 0.75%, the ratio of zeolite to silica-alumina is above 4.5, and it adds one or several of the sourish metal elements: Cu, Zn, Fe, Al, Ni, Zr, Sn, Ga, Ti and V in weight percent of 0.1-10%. It has good zeolite dispersivity and excellent hydrothermal stability, good catalytic cracking property, and excellent function of reducing sulfur content of gasoline. It can be used by mixing with routine FCC catalyst and also be singly applied in the catalytic cracking process course.

High density oxide films are deposited by a pulsed-DC, biased, reactive sputtering process from a titanium containing target to form high quality titanium containing oxide films. A method of forming a titanium based layer or film according to the present invention includes depositing a layer of titanium containing oxide by pulsed-DC, biased reactive sputtering process on a substrate. In some embodiments, the layer is TiO2. In some embodiments, the layer is a sub-oxide of Titanium. In some embodiments, the layer is TixOy wherein x is between about 1 and about 4 and y is between about 1 and about 7. In some embodiments, the layer can be doped with one or more rare-earth ions. Such layers are useful in energy and charge storage, and energy conversion technologies.

The invention discloses rare earth doped luminescent glass for a white light LED and a preparation method thereof. The rare-earth ions of Tb3+, Eu3+ and Ce3+ are used as main compositions; the rare-earth ions are added into a (borate) silicate glass substrate by double-doping or codoping and matched with an ultraviolet LED chip to emit white light. The preparation method comprises three steps of: (a) the selection of raw materials, (b) the mixing of glass batch; and (c) the melting of glass. The kind of glass can effectively be excitated by ultraviolet light and generates emission in a blue light (B) zone, a green light (G) zone and a red light (R) zone, thereby compounding into white light.

The invention relates to a method for preparing fluorescent nano material converted on NaYF4, comprising the steps: yttrium nitrate, ytterbium nitrate and erbium nitrate or yttrium chloride, ytterbium chloride, erbium chloride and thulium chloride are dissolved in de-ionized water according to the mixture radio that the mol ratio of rare earth ions which are yttrium ion, ytterbium ion and erbium ion is equal to (70-95): (1-25): (0.5-10), so that the mixed solution is prepared; water soluble polymer having the ligand radical with the rare earth ions is added into the mixed solution for stirring reaction to form complex compound; the pH value of the mixed solution is adjusted to be 2-6; sodium fluoride, ammonium fluoride or hydrofluoric acid can be added into the mixed solution and stirred until colloid solution that is approximately transparent is obtained; then, the colloid solution is put into a high pressure closed reactor and heated at the temperature of 140-200 DEG C; after that the obtained product is cooled to be the room temperature, centrifugated, separated, washed and dried, finally, the fluorescent nano material converted on NaYF4 is obtained. The method can be used for preparing the converted material at lower temperature, the particle size and the appearance can be controlled, and the water-solubility is good.

The invention provides a catalytic cracking catalyst, comprising 10-50wt% of REY-typed molecular sieve, 10-40wt% of inorganic oxide adhesive and 10-70wt% of clay; wherein, the REY molecular sieve is prepared by the method as follows: NaY molecular sieve is contacted with water solution of rare earth ion or water solution of rare earth ion and solution of Al iron or colloid, and then contacted with additional precipitator so as to lead part rare earth to be deposited on the molecular sieve; subsequently, water heating disposal is carried out, finally, the deposition is contacted with ammonium solution; wherein, the precipitator is alkaline aqueous solution. The catalyst is used for hydrocarbon oil cracking, has strong heavy oil cracking capability, high gasoline yield and better Vr pollution resistance capability.

The invention belongs to the technical field of nanometer biological materials, and particularly relates to rare earth-doped upconversion nanometer crystal-based fluorescent coding microspheres and a preparation method thereof. According to the principle that an upconversion material doped by different rare earth ions emits fluorescent light with different wavelengths under the excitation of an infrared light source, in the rare earth-doped upconversion nanometer crystal-based fluorescent coding microspheres, a strength ratio of the emitted fluorescent light with different wavelengths is usedas fluorescent codes, namely the number of the fluorescent codes is changed by changing the doping varieties and doping content of the rare earth ions in the process of synthesizing nanometer crystals or the fluorescent codes are regulated by controlling ratios of upconversion nanometer crystals of different varieties in a microsphere carrier material. By the fluorescent coding microspheres, the sensitivity and number of detection can be improved further, and a plurality of fluorescent report molecules with different colors can be used simultaneously. The coding microspheres has the wide application prospects in aspects of gene expression, mutual effect among proteins, the high-flux screening of biological samples, the detection of multichannel biological science, disease diagnosis, combined chemistry and the like.

The RE-containing high-silicon Y-type zeolite has Si / Al ratio of 5-30, initial unit cell constant of 2.430-2.460 nm, RE content of 10-20 wt%, ratio between the balanced unit cell constant and initial unit cell constant not smaller than 0.985, and diffraction peak strength ratio I1 / I2 separately at (12.43+ / -0.06) deg and (11.87+ / -0.06) deg obtained through X ray diffraction analysis greater than 1. The zeolite is prepared through the first high stability gaseous process and the subsequent RE ion exchange process. It has optimized structure, high heat stability, high water stability, high cracking activity and good olefin reducing performance.

The invention provides a method of improving luminous efficiency of a rare earth-doped up-conversion luminescence nanometer material through changing the usage of a ligand. According to the method, the synthesis adopts a hydrothermal-solvothermal method, an organic ligand is an organic compound such as monocarboxylic acid, dicarboxylic acid or polycarboxylic acid, and amine, the molar ratio of rare earth ions to the ligand is 2:1-1:100, the molar ratio of NaOH to the ligand is 0:1-1:1, water / alcohol, water / n-propanol alcohol, water / isopropyl alcohol, water / n-butyl alcohol, water / acetone or water / ethylene glycol is used as a solvent, the temperature ranges from 180-240 DEG C, the reaction time is 2-24h, and the F<-> / Re value ranges from 4-12. With the method, the problems of selecting various ligands for synthesizing the up-conversion luminescence nanometer material, improving the luminous efficiency of the rare earth-doped up-conversion luminescence nanometer material, synthesizing the water-soluble up-conversion luminescence nanometer material, and the like can be mainly solved.

The invention discloses Li3YCl6 glass ceramics doped with rare earth ions. The Li3YCl6 glass ceramics is prepared from 87.8-94 mol% of SiO2, 5.5-10 mol% of Li3YCl6 and 0.5-3 mol% of LnCl3, wherein LnCl3 is at least one of YbCl3, ErCl3, TmCl3 and HoCl3. The Li3YCl6 glass ceramics has the advantages of being transparent, resistant to air slake, good in mechanical performance, high in blue and purple light transmittance, low in phonon energy, high in up-conversion efficiency, capable of greatly improving efficiency of an up-conversion laser device, simple in preparation method and low in production cost.

The production of light of various wavelengths using IR phosphor down conversion techniques using existing LED emissions to pump sensitizer-rare earth ions that emit at other wavelengths. A sensitizer absorbs an LED chip pump emission and then transfers that energy with high quantum efficiency to dopant ions that then emits at their characteristic wavelength.

A memory cell and method for controlling the resistance properties in a memory material are provided. The method comprises: forming manganite; annealing the manganite in an oxygen atmosphere; controlling the oxygen content in the manganite in response to the annealing; and, controlling resistance through the manganite in response to the oxygen content. The manganite is perovskite-type manganese oxides with the general formula RE1-xAExMnOy, where RE is a rare earth ion and AE is an alkaline-earth ion, with x in the range between 0.1 and 0.5. Controlling the oxygen content in the manganite includes forming an oxygen-rich RE1-xAExMnOy region where y is greater than 3. A low resistance results in the oxygen-rich manganite region. When y is less than 3, a high resistance is formed. More specifically, the process forms a low resistance oxygen-rich manganite region adjacent an oxygen-deficient high resistance manganite region.

The invention relates to a method for separating rare earth ions by extraction of a liquid-liquid-liquid three-phase system, and belongs to the technical field of rare earth extraction and separation. The method comprises the following steps of: adding a chemical complexing agent into an aqueous solution containing the rare earth ions, regulating the acidity of the solution, adding a water-soluble high polymer and an inorganic electrolyte salt, oscillating and mixing at room temperature, and obtaining a liquid phase system of upper and lower layers; adding a hydrophobic ionic liquid, fully mixing the solution at room temperature, and obtaining an insoluble three-liquid phase coexistence system of upper, middle and lower layers; and respectively taking the upper, middle and lower phases ofthe three-liquid phase system, and reclaiming the rare earth ions by using an electro-deposition method. According to the method, a volatile organic solvent is not used, so that the phase forming behavior and the phase separation process of the three-phase system are easily artificially controlled; and light, medium and heavy rare earth ions are selectively enriched or grouped and separated in three different liquid phases respectively. Compared with conventional oil-water two-phase separation, the method has the advantages that: the process flow is greatly simplified, the method is quick in phase separation and avoids emulsifying, and the hydrophilic and hydrophobic properties of the ionic liquid three-phase system are easily controlled.

The utility model discloses an inorganic composite antimicrobial with zinc - rare earth and a preparation method and applications thereof. The antimicrobial uses natural or chemosynthetic ion exchange material as the carrier, and loads the double active centre of the zinc ions and the rare earth ions by an ion exchange method, wherein, the content of the zinc ions is 6.0 to 8.0wt%, the content of the rare earth ions is 2.0 to 4.0wt%. The antimicrobial exchanges the zinc ions and the rare earth ions into the carrier by means of a liquidoid or a solidoid ion exchange, and then the inorganic composite antimicrobial is prepared after a post treatment. Because having a double antimicrobial active centre of the zinc ions and the rare earth ions which can generate a synergistic effect, the antimicrobial has the advantages of broad antimicrobial spectrum, higher antimicrobial efficiency, good thermal stability and photostability, steady color and low cost; the antimicrobial is an ideal substitute for the silver-loaded inorganic antimicrobial, and can be added in plastic, rubber, fiber, paints, adhesive, paper or ceramic and other material for preparing antimicrobial functional material and products.

The invention discloses a preparation and using method of multiple active porous mineral doped nano-TiO2 composite catalytic anti-bacterial materials, and the preparation and using method belongs to the technical field of new material. The main technical key point of the invention is to combine the anti-bacterial mechanism of the ion modified porous minerals and the photo-catalytic anti-bacterial mechanism of the element doped nano-TiO2 to realize the synergistic anti-bacterial role, the modification of the porous minerals by the metal anti-bacterial ion (one of Ag<+>, Cu<2+>, Zn<2+> and Fe<3+>) and the rare earth ion and the nano-TiO2 doped synchronous composite process technology by the metal anti-bacterial ion and the rare earth ion are realized during the preparation process, thereby obtaining the composite catalytic anti-bacterial composite materials which are characterized by broad-spectrum, long-acting effect and safety, etc. The composite catalytic anti-bacterial products prepared by adopting the method and the technical process have low cost, anti-bacterial and long-acting effects, broad-spectrum and good synergistic anti-bacterial effect, the preparation process of the materials has the advantages of simpleness and strong operationality, and the like, so the preparation and using method can be widely applied in anti-bacterial coating, putty, fabric and other industries.

A mode-locked fiber laser comprising a multicomponent glass fiber doped with a trivalent rare-earth ion of thulium and / or holmium and including a fiber-optic based passive saturable absorber that contains an adhesive material mixed with a saturable absorbing components and is disposed along the length of an optical fiber such as to assure that a mode propagating within the fiber spatially overlaps with the volume occupied by the saturable absorbing components.

The invention discloses a preparation method of a rare-earth-containing Y molecular sieve. The method comprises the following steps: by using an NaY molecular sieve as a raw material, carrying out ammonium exchange treatment, carrying out steam treatment, treating the Y molecular sieve subjected to steam treatment with a mixed solution containing H<+>, NH4<+>, RE<3+> and organic solvent, and drying to obtain the finished product. The invention uses the rare earth ion exchange method to prepare the REY, and the organic reagent is added into the ion exchange liquid, thereby maintaining the advantages of simple operation and uniform rare earth distribution in zeolite in the ion exchange method, enhancing the rare earth ion exchange capacity and improving the vanadium resistance of rare earth; and meanwhile, the catalyst has high activity and high activity stability. The rare-earth-containing Y molecular sieve prepared by the method disclosed by the invention can be used as an acidic component in the catalyst in the process of converting heavy fraction oil into light oil, and is especially applicable to a catalyst in a hydrocracking and catalytic cracking process.

An optical fiber amplifier utilizing a phosphate glass optical fiber highly doped with rare-earth ions such as erbium to exhibit high gain per unit length, enabling the use of short fiber strands to achieve the needed gain in practical fiber optical communication networks. The high-gain phosphate optical glass fiber amplifiers are integrated onto substrates to form an integrated optics amplifier module. An optical pump such as a semiconductor laser of suitable wavelength is used to promote gain inversion of erbium ions and ultimately provide power amplification of a given input signal. Gain inversion is enhanced in the erbium doped phosphate glass fiber by co-doping with ytterbium. A phosphate fiber amplifier or an integrated optics amplifier module utilizing this power amplification can be combined with other components such as splitters, combiners, modulators, or arrayed waveguide gratings to form lossless or amplified components that do not suffer from insertion loss when added to an optical network. The fiber amplifier can be a single fiber or an array of fibers. Further, the phosphate glass fibers can be designed with a temperature coefficient of refractive index close to zero enabling proper mode performance as ambient temperatures or induced heating changes the temperature of the phosphate glass fiber. Large core 50-100 .mu.m fibers can be used for fiber amplifiers. The phosphate glass composition includes erbium concentrations of at least 1.5 weight percentage, preferably further including ytterbium at 1.5 weight percentage, or greater.

The invention relates to optical fiber and a manufacture method thereof, in particular to large-mode active optical fiber and a manufacture method thereof. The large-mode active optical fiber is formed by drawing a fiber core and a quartz glass inner cladding, a quartz glass outer cladding and a coating which are sequentially coated on the outer surface of the fiber core, wherein the fiber core is formed by depositing, melting and collapsing silicon tetrachloride doped with rare-earth ions in a quartz glass tube; the refractive index of the fiber core is a gradually changed refractive index, and a fiber core refractive index section parameter alpha is not smaller than 1 and not larger than 3; and the appearance of the quartz glass inner cladding is in a regular gengon shape. The large-mode active optical fiber has the advantages of large mode and similar single-mode output, improves the capacity of bearing laser power and the energy storage density of the active optical fiber, improves the light beam quality of output laser, solves the problem of hollow ring of the output laser, greatly improves the reliability of high-power optical fiber laser devices and the utilization rate of raw materials and reduces the manufacture cost.

The invention relates to cracking catalyst, containing rare earth ultrastable Y-type zeolite and stroma, wherein the stroma contains alumina with additive; the alumina with additive contains the following composition in percentage by weight: 60 to 99.5 percent of alumina and 0.5 to 40 percent of additive; the additive is selected from one or a plurality of compounds containing alkaline earth, lanthanide metal, silicon, gallium, boron or phosphorus elements; the rare earth ultrastable Y-type zeolite is obtained through a method comprising the following steps that: ultrastable Y-type zeolite and an acid solution with the equivalent concentration between 0.01 and 2 N are mixed with the liquid / solid weight ratio of 4 to 20 in the temperature range between 20 and 100 DEG C, stirred for 10 to 300 minutes, washed and filtered; rare earth salt solution is added in to exchange rare earth ions; the solution is washed and filtered after exchange. The catalyst is strong in heavy oil cracking capability, high in light oil yield and low in coke yield.

The invention relates to a fluorescigenic pavement reflecting adhesive tape and a manufacturing method thereof. The fluorescigenic pavement reflecting adhesive tape is manufactured by adding a reflecting coating or adding various flourescent materials (such as rare earth ion-activated zinc sulfide fluorescence powder) in an amount which is 0.1 to 5 weight percent based on the total amount of the reflecting coating and a substrate into the reflecting coating or the reflecting coating and substrate of any of various conventional pavement reflecting adhesive tapes. The pavement reflecting adhesive tap is comprised of the fluorescigenic reflecting coating, the substrate and a pressure sensitive adhesive, wherein the fluorescigenic reflecting coating is coated on the front side (upper side) ofthe substrate; and the pressure sensitive adhesive is applied on the back side (down side) of the substrate. The novel pavement reflecting adhesive tape retains the various kinds of performance of the conventional pavement reflecting adhesive tapes, particularly retroreflection (namely reflection) performance. The novel pavement reflecting adhesive tape can also emit fluorescence of certain intensity. When used as pavement traffic marking lines or other marks, the novel pavement reflecting adhesive tape is more striking and can be clearly seen easily by drivers, so that the drivers can drive more safely at night.

The invention provides a large-mode-area active optical fiber, which comprises a fiber core, a first cladding, a second cladding and a third cladding, wherein the first cladding, the second cladding and the third cladding sequentially encircle the periphery of the fiber core; the effective refractive index of the second cladding is lower than the effective refractive indexes of the first claddingand the fiber core; a pump core area encircles the outer side of the third cladding; an external cladding encircles the outer side of the pump core area and comprises a layer of air vent holes or capillary bars doped with quartz glass; and the effective refractive index of the external cladding is lower than that of the pump core area. On the premise of ensuring a large mode area of the active optical fiber, the optical fiber suppresses amplified spontaneous radiation, improves the stability of the optical fiber, and ensures the quality of light beam. The invention also provides a preparationmethod of the active optical fiber. By adopting a liquid phase multi-point doping mode of gas-phase aluminum doping and rare-earth ions, continuous doping for many times can be flexibly controlled and realized, the size of a rare-earth doped core bar is greatly increased, and uniform doping of the rare-earth ions and aluminum is simultaneously realized.

This invention discloses crack catalyst to decrease olefin content in catalytic cracking gasoline, which is characterized in that there is 10~50 w.t% CDY molecular sieve in the catalyst that is prepared by exchanging method of solid-liquid combination; the rare earth content is 12~22 w.t% considering the quantity of rare earth oxide; all rare earth ion is in molecular sieve small cage; there is no peak at 0ppm in 27Al M AS NMR spectrogram. The catalyst can decrease olefin content in catalytic cracking gasoline greatly with well heavy oil conversion ability.

The invention discloses rare-earth doped oxyfluoride tellurate scintillation glass and a preparation method thereof. Raw materials TeO2, PbF2, BaF2 and Gd2O3 of the scintillation glass are high-density compounds, so the obtained oxyfluoride tellurate glass has high density, and the density can reach over 6g / cm<3>. Compared with the traditional scintillation glass containing the raw materials PbO, Bi2O3 and the like according to the raw material formula, the scintillation glass of the invention has high short wavelength blue-violet light transmittance and avoids self absorption of the glass; wide wave band also can transmit visible light; the Gd2O3 raw material contained in the scintillation glass can sensitize the luminescence of rare-earth ions such as Tb3+, Ce3+ and the like and greatly improves the output of scintillation light; therefore, the scintillation glass has the advantages of high density, strong scintillation light emission and output, wide wave band and good short wavelength transmission performance. The preparation method for the scintillation glass is simple and has low production cost.