32 results about "Ytterbium" patented technology

The invention discloses a rare-earth metal arylamine group compound as well as preparation method and application thereof. The invention discloses the rare-earth metal arylamine group compound which is characterized in that a general formula of the rare-earth metal arylamine group compound is (2,6-R12PhNH)5LnLi2(THF)2, wherein Ln is a rear-earth metal selected from one of neodymium, samarium, ytterbium or yttrium; R1 is selected from one of hydrogen, methyl or isopropyl. The rare-earth metal arylamine group compound has the advantages that the rare-earth metal arylamine group compound has a definite structure; raw materials used in the preparation method are simple, easily obtained and cheap; the reaction process is simple and easily operated; the rare-earth metal arylamine group compound product is conveniently purified and the yield of the product is high; the rare-earth metal arylamine group compound has a high activity when acting as a single component catalyst to catalyze a hydrogen phosphine reaction of aldehyde or ketone and phosphite ester; the use amount of the catalyst is less; the yield is high; a substrate has wide universality; a new and simple method is provided for synthesis of a-hydroxyphosphonate.

The application relates to an indium-zinc-gallium-oxygen-based near-infrared long-afterglow nanomaterial, a preparation method and application thereof, wherein the preparation method comprises the following steps: taking indium salt, zinc salt, gallium salt, chromium salt and ytterbium salt according to a stoichiometric ratio, dissolving the salts, adding a precipitant and a surfactant to obtain a precursor mixed solution; performing hydrothermal synthesis on the precursor mixed solution to obtain a precursor powder; and performing calcination on the precursor powder to obtain the near-infrared long-afterglow nanomaterial. The near-infrared long-afterglow nanomaterial is prepared by adopting a hydrothermal method combined with a low-temperature calcination process and by optimizing a doping ion concentration, can emit a near-infrared long-afterglow under the excitation of ultraviolet light 254 nm, has excellent afterglow performance, has a remarkable effect in mouse imaging, and has a wide application prospect in the field of biomedical imaging.

The application provides a method for inhibiting refractive index central depression of an ytterbium-doped quartz optical fiber, and belongs to the technical field of optical fiber preparation, and solves the problem of limitations in inhibiting refractive index central depression of an optical fiber; the method comprises the following steps: preparing an ytterbium-doped optical fiber preform; measuring the refractive index central depression diameter of the optical fiber preform; using a physical drilling method to drill the optical fiber preform to remove the refractive index central depression region corresponding to the refractive index central depression measurement value; obtaining a hollow optical fiber preform after drilling and cleaning; high-temperature collapsing the hollow optical fiber preform to obtain an optical fiber preform after refractive index central depression inhibition treatment; measuring the refractive index central depression diameter of the treated optical fiber preform, and if the requirement is met, the inhibition treatment process is completed; the application creatively inhibits the refractive index central depression of the optical fiber by using a physical drilling method, accurately removes the central depression region, has the advantages of wide applicability and repeatable treatment, and improves the laser performance of the optical fiber preform.

A dielectric material includes a main component, a first subcomponent, a second subcomponent, and a third subcomponent. The main component includes barium titanate. The first subcomponent includes zirconium of 2 mol or more and 10 mol or less with respect to 100 mol of titanium of the dielectric material, so that a molar ratio of barium to a sum of titanium and zirconium in the dielectric material is more than 0.90 and less than 0.98. The second subcomponent includes gadolinium of 0.5 mol or more and 2 mol or less with respect to 100 mol of titanium in the dielectric material. The third subcomponent includes 0.01 mol or more and 2 mol or less of manganese with respect to 100 mol of titanium in the dielectric material. The dielectric material contains neither ytterbium nor ruthenium.

This invention relates to a weather-resistant and anti-aging coating for coastal port cranes and its preparation method, belonging to the field of coating materials technology. The coating comprises component A and component B; component A includes an isocyanate-terminated prepolymer, a tri(dibenzoylmethane) ytterbium(III) complex, a spiropyran derivative, and additives; component B is obtained by dissolving isophorone diamine and 2,2'-diaminodiphenyl disulfide in ethyl acetate solvent, with a solid content of 40-60 wt%, and a molar ratio of isophorone diamine to 2,2'-diaminodiphenyl disulfide of (1-4):1; the molar ratio of isocyanate groups in component A to imino groups in component B is (1-1.05):1. This invention accelerates the exchange of dynamic disulfide bonds by constructing a photothermal conversion system, thereby enhancing the coating's ability to dissipate mechanical stress under ultraviolet light irradiation and simultaneously imparting long-term weather resistance to the coating.

The application discloses a synthetic method of a non-toxic environment-friendly type composite inoculant and application thereof, and belongs to the technical field of casting materials. According to mass parts, components of the inoculant are as follows: silicon (Si): 35-50 parts; calcium (Ca): 2-5 parts; strontium (Sr): 1-3 parts; zirconium (Zr): 0.5-2 parts; scandium (Sc): 0.3-1.2 parts; ytterbium (Yb): 0.2-0.8 parts; aluminum (Al): 0.8-2.5 parts; and iron (Fe): 1-2 parts. In the application, scandium and ytterbium, two heavy rare earth elements, are cooperatively matched, and are combined with silicon, calcium, strontium, zirconium and other elements to form a multi-element composite system.

This invention provides a rapid screening method for medium- and high-entropy rare-earth disilicate materials of ytterbium disilicate. The method includes selecting rare-earth elements that can form a monoclinic β phase after equimolar doping of Yb₂Si₂O₇ materials as dopants, obtaining the average RE-O bond length; classifying dopants according to whether they increase or decrease the average bond length, and sorting them by doping weight; establishing a periodic table of orthogonally increasing doping elements based on the sorting results, where materials in the same period or group have the same increasing doping element relative to materials in the previous period or group; conducting material preparation and thermodynamic property experiments; summarizing the experimental results into the periodic table to form a thermodynamic property periodic table, and selecting the most suitable material or the element to be doped. This method can rapidly screen multi-component doped medium- or high-entropy materials, and based on the thermodynamic property periodic table, it can also determine the magnitude of the performance benefits of various dopants on medium- or high-entropy materials.

This invention discloses a 1030 nm soliton-type pulsed F-P cavity femtosecond fiber oscillator, comprising: a mode-locked oscillator cavity, a pump source, a moving mechanism, and a seed source control module; the mode-locked oscillator cavity includes a chirped fiber Bragg grating, a ytterbium-doped fiber, a wavelength division multiplexing (WDM) synthesizer, a beam splitter, and a semiconductor saturable absorber (SESAM); the pump source is connected to the pump port of the WDM synthesizer, the signal port of the WDM synthesizer is connected to the ytterbium-doped fiber and the first end of the beam splitter respectively, and the ytterbium-doped fiber is connected to the chirped fiber Bragg grating; the second end of the beam splitter is connected to the semiconductor saturable absorber (SESAM); by changing the optical path layout of each device in the oscillator, the pump light coupling direction is reversed to avoid interference of the pump light to the SESAM; the mode-locked feedback signal is analyzed in real time by an FPGA, and the pump current adjustment and SESAM switching action are dynamically coordinated to ensure the power stability of the pump source and the synergistic optimization of the SESAM operating point, so that the seed source is in the optimal mode-locked state during long-term operation.

Arrays of optically trapped neutral atoms are a promising architecture for the realization of quantum computers. In order to run increasingly complex algorithms, it is advantageous to demonstrate high-fidelity and flexible gates between long-lived and highly coherent qubit states. In this work, we demonstrate a universal high-fidelity gate-set with individually controlled and parallel application of single-qubit gates and two-qubit gates operating on the ground-state nuclear spin qubit in arrays of tweezer-trapped Ytterbium-171 atoms. We utilize the long lifetime, flexible control, and high physical fidelity of our system to characterize native gates using single and two-qubit Clifford and symmetric subspace randomized benchmarking circuits with more than 200 CZ gates applied to one or two pairs of atoms. We measure our two-qubit entangling gate fidelity to be 99.72(3)% (99.40(3)%) with (without) post-selection. In addition, we introduce a simple and optimized method for calibration of multi-parameter quantum gates. These results represent important milestones towards executing complex and general quantum computation with neutral atoms.

This invention belongs to the field of laser glass fiber technology, and discloses a rare-earth ion spatially partitioned doped silicate glass fiber, its preparation method, and its application. The glass fiber includes a cladding and a core. The core is divided into two symmetrical semi-cylindrical regions along its diameter plane, designated as a first half-core and a second half-core. Both the first and second half-cores are made of rare-earth ion-doped silicate glass, and at least one of the rare-earth ions used in each is different. The silicate glass of this invention exhibits good mechanical properties, strong thermal stability, and good resistance to crystallization. (Yb doping...) 3+ and doped Nd 3+ The silicate laser glass fiber can achieve independent and efficient ion emission by using a single pump to excite or simultaneously excite the corresponding ions. Based on this fiber, an all-fiber optical path was designed and constructed, which can realize the independent and controllable output of two laser beams, 1034 nm (ytterbium ion generation) and 1064 nm (neodymium ion generation).

This invention provides a 980nm fiber laser based on co-pumping by an oscillator and an amplifier, comprising a pump source, an oscillator, a filter element, and a second ytterbium-doped double-clad fiber. The oscillator includes a high-reflectivity fiber grating, a first ytterbium-doped double-clad fiber, and a low-reflectivity fiber grating. The high-reflectivity fiber grating and the low-reflectivity fiber grating together form a resonant cavity. The first ytterbium-doped double-clad fiber, located within the resonant cavity, receives the pump light and generates 980nm signal light through stimulated emission. By designing an optical path structure for co-pumping by the oscillator and amplifier, and utilizing the filter element to filter out 1030nm light while allowing residual pump light to enter the subsequent amplification stage, the unabsorbed residual pump energy in the oscillator is reused. This significantly simplifies the system size and reduces costs while solving the core problems of severe pump energy waste and low optical-to-optical conversion efficiency in existing technologies.

This invention relates to the field of laser technology and discloses a method for generating high-power yellow-green laser. The method involves generating pump light from a first seed source and signal light from a second seed source. The pump light and signal light are mixed by a first wavelength division multiplexer, then combined with the light from the first pump source in a beam combiner. The combined beam is then amplified by a first ytterbium-doped fiber to obtain high-power laser light. After collimation by a collimator and dichroism by a first dichroic mirror, the laser light is frequency-doubled by a frequency-doubling crystal and finally dichroically separated by a second dichroic mirror to output high-power yellow-green laser light. This invention discloses a fiber laser for generating high-power yellow-green laser light, which reduces the number of core components in the optical path structure, simplifies the optical path structure and control logic, and reduces the hardware cost and assembly / debugging cost of the equipment. It effectively improves the stimulated Brillouin threshold of the laser and suppresses broadening during spectral amplification, while maintaining stable and good temporal characteristics.

The application discloses a single-seed-source-based all-fiber flat ultraviolet-mid-infrared supercontinuum laser, which comprises a seed laser, two-stage ytterbium-erbium-doped fiber amplifiers, a high-nonlinear fiber NL-1550, a large-mode-field ytterbium-erbium-doped fiber amplifier, a large-mode-field ytterbium-doped fiber amplifier, a photonic crystal fiber and a passive fluorine-doped fiber which are connected in sequence; wherein the seed laser outputs seed pulse laser of 1.55 mu m, and finally outputs supercontinuum laser with a spectral range of 370-4500 nm, covering ultraviolet-mid-infrared bands. The application adopts an all-fiber structure, has high stability and portability, reduces the loss in the process of light transmission and the system complexity, realizes double-wavelength pumping through a seed source, and realizes super-flat spectral output covering ultraviolet to mid-infrared through a multi-stage amplification structure and a multi-stage nonlinear medium structure.

This invention relates to a low infrared emissivity gadolinium ytterbium phosphate thermal protective coating material and its ceramic powder preparation method. The general chemical formula of gadolinium ytterbium phosphate is Gd. 1‑x Yb x PO4. Rare earth oxide powder was heat-treated; diluted nitric acid was prepared by mixing concentrated nitric acid with deionized water; the pretreated rare earth oxide powder was weighed and added to the diluted nitric acid, then heated and stirred to dissolve; phosphate was weighed and dissolved in deionized water to obtain a phosphorus-containing solution; the rare earth nitrate solution and phosphorus solution were uniformly mixed, and ammonia was used as a precipitant. Under mechanical stirring, the mixed solution was added dropwise to the ammonia solution at a uniform rate, and a white precipitate was formed during the reaction; the dried precursor powder was placed in a crucible and calcined to obtain crystallized Gd. 1‑x Yb x PO4 powder is then ground and sieved to obtain a powder that can be directly used as a raw material for preparing thermal protective coatings. The ceramic material of this invention has an infrared emissivity of 0.18~0.37 in the 0.5~4.5 μm band at 1100 ℃, exhibiting outstanding high-temperature infrared radiation suppression capability, thus meeting the application requirements for low infrared emissivity at higher operating temperatures.

A display device includes: a substrate; a first electrode on the substrate; an emissive layer on the first electrode; an electron transport layer on the emissive layer; an electron injection layer on the electron transport layer; and a second electrode on the electron injection layer and containing silver (Ag), wherein the electron transport layer includes: a first electron transport layer; and a second electron transport layer on a surface of the first electron transport layer, wherein a surface of the second electron transport layer contacts the electron injection layer, and a refractive index of the second electron transport layer is greater than a refractive index of the first electron transport layer, and wherein the second electrode includes: a first sub-electrode containing silver (Ag); and a second sub-electrode located on the first sub-electrode and containing ytterbium (Yb) and / or magnesium (Mg).

The application discloses a high-activity VOCs waste gas treatment composite catalyst and a preparation method thereof, and belongs to the field of environmental protection catalysis technology. The high-activity VOCs waste gas treatment composite catalyst is composed of the following components in percentage by weight: a manganese / cerium / bismuth / lanthanum quaternary composite metal oxide 3-22%, a modified attapulgite-stellerite composite carrier 70-92%, a tungsten-ytterbium composite additive 2-7% and a high-temperature-resistant binder 0.8-2.5%. In the manganese / cerium / bismuth / lanthanum quaternary composite metal oxide, the molar ratio of manganese, cerium, bismuth and lanthanum is 1:(0.6-1.0):(0.3-0.6):(0.2-0.4). The application adopts the manganese / cerium / bismuth / lanthanum quaternary composite metal oxide as a core active component, and the quaternary components form a strong synergistic effect: the manganese oxide provides core oxidation active sites, realizes deep oxidation of VOCs; the cerium oxide constructs an efficient oxygen storage and release system, improves the oxygen vacancy content and the oxidation and reduction performance; the bismuth oxide precisely regulates the catalyst surface acid sites, promotes the C-Cl bond breaking and dechlorination process of chlorine-containing VOCs, and inhibits the generation of polychlorinated by-products.

This invention discloses a divalent rare earth-graphyne composite material, its preparation method, and its application in thermocatalytic ammonia production, belonging to the field of catalyst materials technology. The divalent rare earth-graphyne composite material comprises rare earth ions, iodide ions, and graphyne material. The rare earth ions are selected from at least one divalent ion of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium. The rare earth ions and iodide ions exist on the surface of the graphyne material in the form of nanoparticles. This divalent rare earth-graphyne composite material achieves thermocatalytic ammonia production under mild conditions through the interaction of rare earth nanoparticles and oxygen-containing functional groups on the graphyne surface, and is expected to become a new generation of high-performance thermocatalytic ammonia production catalyst.

The present invention relates to a method for producing a luminescent inorganic material based on an oxyfluoride matrix doped with multiple combinations of rare-earth ions (ytterbium (Yb), erbium (Er), thulium (Tm), europium (Eu) and neodymium (Nd)), and which contains micro- and nanostructured phases obtained using a thermal treatment. Advantageously, the material obtained using the method of the present invention generates a luminescence pattern with simultaneous emission in the near infrared spectrum and in the visible spectrum under 980 nm infrared excitation, which enables the material to be used in anti-counterfeiting security devices, such as security inks for printing textiles, paper money or printed circuits, among others.

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an organic layer disposed between the first electrode and the second electrode and includes an emission layer; and a fused cyclic compound represented by Formula 1 defined herein, wherein at least one of the first electrode and the second electrode, independently from one another, includes an indium tin oxide, an indium zinc oxide, a tin oxide, a zinc oxide, magnesium, silver, aluminum, lithium, aluminum-lithium, calcium, magnesium-indium, magnesium-silver, ytterbium, silver-ytterbium, or any combination thereof.

A method for purifying lutetium includes providing a solid composition comprising ytterbium and lutetium and subliming or distilling ytterbium from the solid composition at a temperature of about 1196° C. to about 3000° C. to leave a lutetium composition comprising a higher weight percentage of lutetium than was present in the solid composition.

The invention relates to a composite material having an elemental composition consisting of 30 to 70 wt% of nickel; 5 to 20 wt% of molybdenum; 2 to 10 wt% of chromium; 2 to 10 wt% of X, wherein X is one or more elements selected from the group consisting of cerium, cobalt, copper, gadolinium, lanthanum, lithium, magnesium, niobium, praseodymium, samarium, scandium, strontium, tantalum, titanium, tungsten, ytterbium, yttrium and mixtures thereof; and optionally up to 30 wt% of oxygen, wherein the balance of the composite metal and metal oxide material consists of aluminum or zinc or mixtures thereof and unavoidable impurities. The invention also relates to the use of the composite material of the invention in the production of electrochemical catalyst systems, electrodes for energy storage or energy conversion applications. Finally, the invention relates to an electrode comprising a substrate coated with the composite material according to the invention.

The present invention relates to a lightweight high-power pump source, comprising a housing and N pump light chips installed in partitions in the housing, wherein N is an integer greater than or equal to 1, each pump light chip comprises a respective corresponding coupling lens group, and each pump light chip is used for emitting pump laser light with different wavelengths, performing beam shaping by means of the respective corresponding coupling lens group, and then coupling the pump laser light to an output optical fiber by means of an output lens group; and the housing is made of a graphene-reinforced aluminum matrix composite material. In the present invention, a lightweight material is used to manufacture a package housing, and therefore excellent mechanical properties and stability are maintained. Since the density of the lightweight material is much lower than that of oxygen-free copper, the weight of the pump source per unit power is effectively reduced, thereby making the entire optical-fiber laser system more lightweight, and thus facilitating installation and maintenance. Moreover, the present invention introduces multi-wavelength pump light chips to optimize the wavelength distribution of pump light, thereby making the pump light better match the absorption characteristics of ytterbium-doped optical fibers, and thus effectively redistributing the thermal load of the ytterbium-doped optical fibers and significantly increasing the threshold value of a mode instability effect, thus improving the power output capability and long-term operation stability of the optical-fiber laser system.

The invention relates to a composite material having an elemental composition consisting of 30 to 70 wt% of nickel; 5 to 20 wt% of iron; 2 to 10 wt% of chromium; 2 to 10 wt% of X, wherein X is one or more elements selected from the group consisting of cerium, cobalt, copper, gadolinium, lanthanum, lithium, magnesium, niobium, praseodymium, samarium, scandium, strontium, tantalum, titanium, tungsten, ytterbium, yttrium and mixtures thereof; and optionally up to 30 wt% of oxygen, wherein the balance of the composite metal and metal oxide material consists of aluminum or zinc or mixtures thereof and unavoidable impurities. The invention also relates to the use of the composite material of the invention in the production of electrochemical catalyst systems, electrodes for energy storage or energy conversion applications. Finally, the invention relates to an electrode comprising a substrate coated with the composite material according to the invention.

The present invention discloses a rare earth orthosilicate crystal doped with trivalent ytterbium ions, its preparation method and application, belonging to the technical field of crystal preparation. The molecular formula of the rare earth orthosilicate crystal doped with trivalent ytterbium ions is (Yb x Sc y Y 1‑x‑y )2SiO5, where: the value ranges of x and y are respectively: 0 < x ≤ 0.1, 0 < y ≤ 0.5. This crystal is obtained by doping a small amount of Yb and Sc into a yttrium silicate crystal and adopting the crystal growth process of the pulling method. Among them, Y 3+ has two different symmetry lattice sites. When Yb 3+ substitutes for Y 3+ , it exhibits strong crystal field coupling, thereby broadening the gain spectrum. When Sc 3+ ions are introduced, due to the random occupancy of Sc 3+ and Y 3+ ions in the lattice, the crystal structure becomes more disordered. This disorder further enhances the inhomogeneous broadening of the Yb 3+ spectrum, making it have a very wide emission spectrum and absorption spectrum near 1 μm. Therefore, it is very suitable for realizing the output of continuous wave and femtosecond pulsed lasers by semiconductor laser pumping and achieving applications.

This invention provides a lead-free radiation shielding board, its preparation method, and installation structure. The lead-free radiation shielding board includes a radiation shielding center board, which comprises: inorganic components and a polymer adhesive; the inorganic components include elemental metals and / or compounds of metals; the metals include any one or a combination of at least two of samarium, cerium, lanthanum, tungsten, gadolinium, ytterbium, yttrium, antimony, or bismuth; or, the metals include a combination of at least two of samarium, cerium, lanthanum, tungsten, gadolinium, ytterbium, yttrium, antimony, bismuth, barium, or tin. This invention can replace traditional barium sulfate boards, achieving weight and thinning effects, and is lead-free, non-toxic, simple to construct, short in cycle, and low in construction cost.

This invention belongs to the technical field of magnesium-ion battery anode materials, and relates to an alloy-type magnesium-ion battery anode material, its preparation method, and a magnesium-ion battery. The anode material is a magnesium alloy; based on the total weight of the magnesium alloy, the content of rare earth metal elements is 0.1-3 wt%, preferably 0.5-2 wt%, with the balance being magnesium; wherein the rare earth metal elements are lanthanide elements, preferably at least one selected from lanthanum, praseodymium, samarium, holmium, dysprosium, erbium, and ytterbium. Compared to pure magnesium anodes, the alloy material obtained by this method has a longer cycle life and lower overpotential, while also possessing advantages such as environmental friendliness, low cost, and simple processing, showing promising application prospects.

This invention discloses a carbon / carbon composite material based on ytterbium silicide and organoceramic modification, and its preparation method, relating to the field of ceramic-modified composite materials technology. The method includes the following steps: ytterbium powder and nano-silica are mixed uniformly and sintered under an inert atmosphere and pressure conditions. After sintering, the mixture is cooled to room temperature and ball-milled to obtain ytterbium silicide powder. An organoceramic precursor and ytterbium silicide powder are dissolved or dispersed in a solvent to obtain an impregnation solution. The carbon / carbon composite matrix is ​​immersed in the impregnation solution and vacuum impregnated several times to obtain a sintering precursor. The sintering precursor is heated to 1500-1800℃ and sintered under an inert atmosphere and pressure conditions. After sintering, the mixture is cooled to room temperature. The impregnation and sintering steps are repeated 1-2 times to obtain the final product. The composite material of this invention exhibits better temperature resistance.

This application relates to the field of laser technology, specifically a laser comprising: a pump source, a half-wave plate assembly, a wavelength division multiplexer, a polarization-maintaining ytterbium-doped fiber, a first collimator, a first reflector, a second reflector, a first polarization beam splitter, a second polarization beam splitter, a first chirped fiber grating, and a narrow-linewidth fiber grating. The half-wave plate assembly is used to change the polarization direction of the laser, and the first and second reflectors are used to reflect P-polarized or S-polarized light to the half-wave plate assembly. The technical solution provided by this application enables the laser to output both femtosecond and picosecond lasers, reducing operating costs. Furthermore, the optical path design of this application is simple and highly compatible; by adjusting the half-wave plate assembly, the laser can switch between outputting different laser types. The femtosecond and picosecond laser outputs are stable, ensuring stable laser beam operation and improving the laser's performance.