239 results about "Strontium" patented technology

The method comprises the following steps: weighing an oxide precursor of metal indium, an oxide precursor of metal M, an ammonium salt and a lithium salt according to a chemical formula of indium-based halide, fully mixing, and calcining in an inert atmosphere to obtain the indium-based halide solid electrolyte. Forming an indium-based halide solid electrolyte through a solid-phase reaction; wherein M is selected from at least one of magnesium, calcium, strontium, barium, aluminum, gallium, indium, bismuth, scandium, yttrium, zinc, germanium, tin, lanthanum, cerium, samarium, gadolinium, holmium, erbium and ytterbium. The method can greatly simplify the synthesis process, reduce the raw material cost and realize industrial batch preparation.

The invention belongs to the technical field of geological sample analysis and detection, and particularly discloses a method for measuring the amount of each element of lithium ore in a closed acid-soluble system, and the method comprises the following steps: pretreating the lithium ore; the pretreated lithium ore is weighed and put into a closed sample dissolving device, hydrofluoric acid and purified nitric acid are sequentially added, and the closed sample dissolving device is closed; carrying out heat preservation on the closed sample dissolving device twice to obtain a test solution; and measuring the test solution by using an inductively coupled plasma mass spectrometer to obtain a working curve, and calculating the content of the analysis element in the sample solution by using the working curve. The method for determining the amount of each element in the lithium ore by adopting the closed acid-soluble system has the characteristics of simplicity in operation, high efficiency and good stability, realizes simultaneous determination of the amount of lithium, rubidium, cesium, beryllium, strontium, niobium, tantalum, zirconium, hafnium and rare earth elements in the large-batch lithium ore, and further provides a reference for determination of main trace elements in the lithium ore.

The invention relates to a method for producing mayenite, comprising the following sequential steps: a) preparing a feed suitable for obtaining, at the end of step c), a product comprising more than 90% mayenite in percentage by weight based on the weight of the crystalline phase, said mayenite comprising calcium and / or strontium, aluminum and oxygen; b) melting the feedstock until a molten material is obtained; c) cooling the molten material in order to solidify the molten material and obtain a polycrystalline fused product; the melting is carried out using an electric arc furnace and in a reducing medium.

The invention relates to the technical field of isotopes, in particular to a method and system for separating yttrium [90Y] in mother liquor containing strontium [90Sr]. The invention provides a method for separating yttrium [90Y] in mother liquor containing strontium [90Sr], which comprises the following steps: S1, adding the mother liquor containing strontium [90Sr] into a resin separation column, leaching with leacheate, collecting the leacheate containing strontium [90Sr], and emptying the liquid in the resin separation column with air; s2, eluting by using an eluent, and collecting the eluent containing yttrium [90Y]; wherein the total volume of the used leacheate is at least 11 times of the volume of the resin separation column. By means of the separation method, separation and recovery of yttrium [90Y] in the strontium [90Sr] mother liquor can be achieved, the recovery rate of strontium [90Sr] can be increased, the recovery rate of strontium [90Sr] can reach 98% or above, and the content of other metal impurities after recovery can be reduced.

The invention relates to a high-temperature, high-infrared-emissivity and low-thermal-conductivity coating and a preparation method and application thereof. The preparation method comprises the following steps: cleaning a substrate and carrying out sand blasting treatment; spraying alloy powder to form a bonding layer; and spraying an atomized solution containing a water-soluble strontium source, a water-soluble X source and a water-soluble zirconium source by utilizing a solution plasma spraying process, thereby obtaining the strontium-zirconium-zirconium-strontium-strontium-zirconium composite material. The Sr (Zr < 1-y > X < y >) Oz coating prepared by the preparation method disclosed by the invention has relatively high infrared radiation performance, and the infrared emissivity of the coating at 600 DEG C can reach 0.986; the coating prepared by the preparation method disclosed by the invention has low thermal conductivity, and the thermal conductivity of the coating can be as low as 1.63 W.m <-1 >. K <-1 > at 1000 DEG C. The obtained coating is suitable for various base materials and complex surface structures, and can form a uniform and continuous coating in different application scenes such as aircraft skins, electronic device shells and sintering furnace inner chambers, so that the comprehensive performance of the coating is ensured.

The invention provides a method for purifying strontium-90, which belongs to the technical field of separation and purification, and comprises the following steps: evaporating a strontium-90 aqueous solution extracted from high-level liquid waste, and adjusting the acid with fuming nitric acid to obtain a seasoning liquid; stirring the seasoning liquid, standing, filtering, washing the obtained precipitate, and dissolving to obtain a dissolved solution; loading the dissolving solution onto a pre-balanced strontium resin column, then sequentially eluting the strontium resin column by using a first eluting agent, a second eluting agent and a third eluting agent, and then eluting strontium-90 on the strontium resin column by using an eluent to obtain an eluent; loading the eluent onto an oil removal column, and collecting effluent, namely a purified strontium-90 solution. According to the method for purifying the strontium-90, equipment and operation are relatively simple, a non-radioactive carrier does not need to be added in the purification process, and the purification degree is relatively high.

This application discloses a composite mineralization material, its preparation method, and its application, belonging to the technical field of mineralization materials for water purification. The preparation method includes the following steps: (1) Selecting strontium-containing ore, zinc-containing ore, metasilicic acid-containing ore, and carbonate-containing ore from natural ores, crushing the above ores respectively, and calcining them at 600-800℃ for 1-4 hours; (2) Soaking the calcined ores in pure water, then performing carbonation treatment, air-drying, and performing component analysis to screen and obtain the strontium-containing mineralization material, zinc-containing mineralization material, metasilicic acid-containing mineralization material, carbonate-containing mineralization material, and basic material; (3) Crushing the mineralization material and basic material again, mixing them according to the weight ratio to obtain the composite mineralization material. The composite mineralization material prepared by this method can solve the problem of excessive metal elements and organic matter in natural ores, and can achieve stable dissolution of minerals, reduce scaling, and improve the service life of water purification devices.

The present application relates to the technical field of water treatment and environmental governance, and particularly relates to a nickel-strontium titanate electrode for removing uranium, a preparation method and application thereof, and the preparation method comprises the following steps: mixing a titanium source, an alcohol amine carrier and an alkaline solution to obtain a precursor solution; adding a nickel source and a strontium source into the precursor solution, performing ultrasonic treatment and hydrothermal reaction to obtain a nickel-strontium titanate material; and coating the nickel-strontium titanate material on the surface of a carbon fiber base material to obtain the nickel-strontium titanate electrode for removing uranium. Through the combination process of nickel doping, hydrothermal reaction and carbon cloth base coating, the prepared electrode forms a porous and uniformly dispersed composite structure, and meanwhile, the electrode can have optimal selectivity and removal efficiency for uranium in the range of pH 3-9. The nickel-strontium titanate electrode for removing uranium prepared by the present application is suitable for large-scale water treatment applications, and has a good application prospect in the fields of nuclear waste water and drinking water purification.

A process for producing amines by reductive amination, the process includes introducing a feed stream, the feed stream comprising an amino alcohol and a reducing agent, and hydrogen in a reaction zone of a reactor, and contacting the feed stream with a catalyst in the reaction zone. A hydrogen flow rate into the reaction zone is adjusted, and a product stream comprising ethyleneamines is extracted. The catalyst includes a carrier component selected from alumina, silica, and combinations thereof; and an active component having a first metal, a second metal, and a third metal. The first metal is selected from cobalt, nickel, and copper, the second metal is selected from rhenium, ruthenium, chromium, zinc, sodium, calcium, magnesium, strontium, lithium, potassium, barium, cesium, lanthanum, tungsten, iron, silver, titanium, manganese, aluminum, rhodium, platinum, palladium, iridium, and combinations thereof, and the third metal is niobium.

The application provides a strontium mineralization slow-release filter element and a preparation method and a water purifier. The strontium mineralization slow-release filter element comprises the following components in parts by weight: 4-10 parts of celestite powder, 80-250 parts of activated carbon and 40-125 parts of glue powder. The particle size of the celestite powder is 120-200 meshes. The particle size of the activated carbon is 80-120 meshes. The molecular weight of the glue powder is 300,000-5,000,000. The strontium mineralization slow-release filter element can ensure that the strontium element concentration in mineral water is not too high, and can control the slow and stable release of the strontium element, which is beneficial to promoting the health of human bodies.

The invention discloses a nuclear power station risk assessment method and device, electronic equipment and a storage medium. The method comprises the following steps: detecting a radiation source at a preset part position of the nuclear power plant to obtain first detection data, and determining a radiation risk factor of the nuclear power plant according to the first detection data; wherein the radiation source comprises neutron radiation, an alpha ray, a beta ray, a gamma ray and an x ray; detecting a pollution source and plants at a preset environment position of the nuclear power station to obtain second detection data, and determining an environment risk factor of the nuclear power station according to the second detection data; wherein the preset environment position comprises a preset soil position and a preset water body position, and the pollution source comprises strontium and cesium; and evaluating the operation risk of the nuclear power station according to the radiation risk factor and the environmental risk factor. According to the technical scheme of the embodiment of the invention, the representativeness of the radiation risk factor and the environmental risk factor can be improved, and the comprehensiveness and the accuracy of the operation risk assessment result of the nuclear power station are further improved.

The application discloses doped modified manganese iron phosphate with a nanoporous structure, a preparation method and application thereof. 1‑a‑b Fe a M b PO4, 0.01<=a<=0.98, 10 ‑4 <=b<=10 ‑2 M is a combination of one or more selected from magnesium, titanium, vanadium, chromium, cobalt, nickel, zinc, gallium, aluminum, zirconium, niobium, molybdenum, tin, antimony, calcium, barium, strontium, boron, ruthenium, silicon, tellurium, copper and lithium, and the particle size is below 50 nm, and the material also has a porous structure. The material can be used for preparation of lithium manganese iron phosphate positive electrode materials in lithium ion batteries, and the specific capacity, rate and cycle performance of the obtained positive electrode materials are improved.

This invention discloses a method for precipitation separation and ceramic solidification of divalent strontium and tetravalent uranium in radioactive waste liquid, relating to the field of radioactive waste liquid treatment and disposal. U in high-level radioactive waste liquid is in the form of hexavalent uranyl (UO2). 2+ U exists in the form of hydrogenation catalytic reduction, and the present invention uses hydrogenation catalytic reduction to prepare U. 4+ Sr 2+ and U 4+ ionic radius and Ln 3+ Due to the significant differences, CePO4·0.667H2O cerium phosphate, which has a stronger nuclide-containing capacity, was selected as the co-precipitation enrichment agent for Sr. 2+ and U 4+ Separation precipitant. Inexpensive raw materials such as UO2(NO3)2·6H2O, Sr(C2H3O2)2, NH4H2PO4, and Ce(NO3)3·6H2O are selected. By controlling the Sr... 2+ :U 4+ Ion ratio, reaction time, temperature, pH, and preparation of well-developed Sr crystals 2+ / U 4+ The precipitate of cerium phosphate solid solution with high solid content is avoided by using spark plasma solid-state sintering technology to prevent grain agglomeration and adhesion during high-temperature dehydration and crystal transformation of cerium phosphate. Furthermore, pressure sintering can promote further growth of nanocrystals and promote U... 4+ and Sr 2+ Homogenization within the monazite ceramic solidified body enables a one-step preparation of monazite ceramic solidified body from a lanthanite solid solution.

Methods for photocatalytic water splitting of produced waters may comprise introducing a photocatalyst comprising a semiconductor to a produced water comprising ions of sodium, chloride, calcium, magnesium, potassium, sulfate, barium, iron, lithium, strontium, or any combination thereof; in the presence of sunlight, allowing the photocatalyst to facilitate a reduction-oxidation reaction of a plurality of water molecules from the produced water; and obtaining hydrogen and oxygen.

Provided herein are methods and systems for extracting zirconium and / or other impurities from a strontium-containing mixture. A method for removing zirconium from a mixture including zirconium and strontium can include converting at least a portion of a Zr-containing precursor to ZrF4 in the mixture, converting at least a portion of a Sr-containing precursor to SrF2 in the mixture, solubilizing at least a portion of the ZrF4 and / or the SrF2 in a solvent to create a solution, and / or separating at least a portion of the solubilized ZrF4 and / or at least a portion of the solubilized SrF2 from the mixture.

The invention relates to a multi-permeable reactive barrier developed for use in nuclear power plants, which provides the uptake of cesium and strontium radionuclides, and contains at least one upper cover (1) providing fixation, through which the liquid enters; at least one lower cover (2) providing fixation, through which the liquid exists (drainage); at least one sealing element (3) positioned to separate each component from each other; at least one liquid permeable filter (4); and at least one body (5) containing zeolite, diatomite, clay and sepiolite components, respectively from top to bottom.

A multilayer piezoelectric element includes: (i) multiple piezoelectric ceramic layers, wherein: a primary component constitutes a perovskite structure of an alkali niobate; at least one of calcium, strontium, and barium, and silver, are contained; 0.1-2.0 mol of lithium, and 1.5-4.0 mol of silicon, per 100 mol of the primary component, are contained in a manner that a ratio of Li / Si becomes 0.025 or higher but under 0.40; and as measured with an X-ray diffraction measurement, a strongest diffraction line intensity (Imax) at 10.00°≤2θ≤50.00°, a strongest diffraction line intensity (IL2S) at 26.50°≤2θ≤27.50°, and an average value of diffraction line intensity (IBG) at 27.50°≤2θ≤29.00° satisfy a relationship R1=(IL2S−IBG) / (Imax−IBG)×100≥0.20; and (ii) internal electrodes that are placed between the multiple piezoelectric ceramic layers, and formed by a metal whose silver content is 80% by mass or higher.

The present invention belongs to the technical field of nuclide adsorption materials, and specifically discloses a Ca-ZrP-1,8-octanediamine composite material, its preparation method, and use. The composite material is synthesized by intercalation and ion exchange reaction using hydrothermal ZrP as a substrate. Compared with the prior art, the process for preparing the Ca-ZrP-1,8-octanediamine composite material is simple, economical, and does not produce intermediate products that pollute the environment. The prepared Ca-ZrP-1,8-octanediamine composite material has better adsorption performance than pure zirconium phosphate, stable performance in a wide pH range and a high correlation coefficient, and is more effective for Sr at pH = 1. 2+ The adsorption capacity reaches 34.52 mg / g, which is much higher than that of pure ZrP and can be used for the adsorption of radionuclide strontium.

The present invention belongs to the technical field of bonded copper wires, and particularly relates to a palladium-plated bonded copper wire and its preparation process. Copper, platinum, cobalt, zirconium, magnesium, strontium, rare earth metal elements and silicon are mixed to form a copper-based bonded wire material. The functions of the metals platinum, cobalt and zirconium and the combined silicon help to improve the internal grain distribution structure of the copper wire, improve the mechanical properties such as the tensile strength of the copper wire, the balling degree and the oxidation resistance; the magnesium, strontium and rare earth metal elements used help to improve the bonding performance of the bonded copper wire. The primary and secondary palladium plating processes are adopted to make the bonded copper wire have excellent tensile properties, bonding properties and oxidation resistance.

The invention discloses a preparation method of a composite aerogel for adsorbing cesium and strontium in wastewater. The composite aerogel prepared by the invention shows multiple technical advantages: due to a unique hierarchical pore structure, the composite aerogel has ultralow density and high porosity; rich surface functional groups of MXene and the ion screening effect of PB generate a synergistic effect, and selective removal of radionuclides such as Cs and Sr in wastewater is realized. Compared with traditional ion exchange resin and zeolite adsorbents, the adsorbent has the advantages of being large in adsorption capacity, short in adsorption time, high in adsorption efficiency, good in circulation effect and the like, and is particularly suitable for the fields of nuclear industry wastewater treatment, radioactive pollution emergency repair and the like.

A high-power, high-temperature-stability M-type strontium ferrite belongs to the field of ferrite material preparation technology. The ferrite comprises a main formulation of SrCO3, La2O3, CaCO3, MnO, SnO2, Fe2O3, and Co2O3, and additives composed of CaCO3, SiO2, H3BO3, and La2O3. This invention introduces Sn-Mn ions for co-substitution, thereby constructing a Sn... 4+ -Mn 2+ The charge balance mechanism effectively suppressed the Fe ionization induced by the introduction of high-valence ions. 3+ To Fe 2+ Price change behavior, effective compensation after replacement due to the introduction of non-magnetic Sn 4+ This results in a loss of lattice magnetic moment. Simultaneously, through a stepped pre-sintering and sintering process, a CoFe2O4 hard magnetic spinel phase is induced to precipitate in the M-type strontium ferrite main phase. The negative coercivity temperature coefficient of the CoFe2O4 phase complements the inherent positive temperature coefficient of the matrix.

The present invention discloses a crystalline aluminosilicate small-pore zeolite having a maximum ring size of eight tetrahedral atoms, wherein the zeolite comprises copper, wherein the Cu: Al atomic ratio is between 0.12 and 0.55; and manganese, wherein the Mn: Cu atomic ratio is between 0.05 and 0.95; and a metal M, wherein M is selected from magnesium, calcium, barium, strontium, yttrium, titanium, zirconium, niobium, iron, zinc, silver, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and mixtures thereof, and wherein the M: Cu atomic ratio is between 0.05 and 0.80; and wherein the sum of the atomic ratios of copper, manganese and the metal M to aluminum, (Cu+Mn+M): Al, is between 0.20 and 0.80; and wherein the zeolite comprises at least 2.5 wt.-% of copper, calculated as CuO and based on the total weight of the zeolite. Catalyst substrate monoliths comprising the crystalline aluminosilicate zeolite are also disclosed. These catalyst substrate monoliths can be used in a process for the removal of nitrogen oxides from combustion exhaust gases, and they can be part of emissions treatment systems.

A method for processing a substrate includes positioning a silicon substrate in a deposition chamber. One or more intermediate layers are deposited on a surface of the silicon. The one or more intermediate layers can include strontium, which combines with the silicon to form strontium silicide. Alternatively, the one or more intermediate layers comprise germanium. A layer of amorphous strontium titanate is deposited on the one or more intermediate layers in a transient environment in which oxygen pressure is reduced while temperature is increased. The substrate is then exposed to an oxidizing and annealing atmosphere that oxidizes the one or more intermediate layers and converts the layer of amorphous strontium titanate to crystalline strontium titanate.

A solid oxide electrochemical cell includes a solid oxide electrolyte, a fuel electrode located on a first side of the solid oxide electrolyte, and an air located on a second side of the solid oxide electrolyte. The air electrode includes strontium-rich lanthanum strontium manganite.

The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a neodymium-cobalt co-substituted M-type strontium ferrite dual-band wave absorbing material and a preparation method thereof. The chemical formula of the dual-band wave-absorbing material is Sr < 1-x > Nd < x > Co < 0.2 > Fe < 1. 8 > O < 19 >, wherein x is equal to 0.1 to 0.4. The method comprises the following steps: forming sol from a strontium source, a neodymium source, a cobalt source, an iron source and citric acid monohydrate, adjusting the pH value through ammonia water, heating to form gel, drying, grinding, and carrying out heat treatment at 250 DEG C, 450 DEG C and 1400 DEG C to obtain a target product. After the obtained material is compounded with paraffin, wave-absorbing response can be shown in wave bands of 2-18 GHz and 26.5-40 GHz, and the material can be used as a wave-absorbing filler for an electromagnetic protection material.

The invention relates to a multi-permeable reactive barrier developed for use in nuclear power plants, which provides the uptake of cesium and strontium radionuclides, and contains at least one upper cover (1) providing fixation, through which the liquid enters; at least one lower cover (2) providing fixation, through which the liquid exists (drainage); at least one sealing element (3) positioned to separate each component from each other; at least one liquid permeable filter (4); and at least one body (5) containing zeolite, diatomite, clay and sepiolite components, respectively from top to bottom.

An olefin compound may be produced by a process that may include passing a feed stream to a reactor, wherein the feed stream comprises one or more hydrocarbons; and transferring an oxygen carrier material into the reactor. In the reactor, the one or more hydrocarbons may be dehydrogenated to form hydrogen and one or more olefin compounds, and at least a portion of the hydrogen may be reacted with oxygen from the oxygen carrier material to produce water. The oxygen carrier material may include a first composition. At least 95% by weight of the first composition may consist of: 1 mole parts of iron; 0.1 to 1 mole part of one or more alkali metals; 0.001 to 3 moles of a combination of one or more of calcium, magnesium, strontium, barium, cerium, molybdenum, tungsten, copper, nickel, manganese, rhodium, silver, gold, palladium, or platinum; and 1 to 20 parts by mole of oxygen.

Provided herein are methods and systems for extracting zirconium and / or other impurities from a strontium-containing mixture. A method for removing zirconium from a mixture including zirconium and strontium can include converting at least a portion of a Zr-containing precursor to Zrp4 in the mixture, converting at least a portion of a Sr-containing precursor to Srp2 in the mixture, solubilizing at least a portion of the Zrp4 and / or the Srp2 in a solvent to create a solution, and / or separating at least a portion of the solubilized Zrp4 and / or at least a portion of the solubilized Srp2 from the mixture.

The invention belongs to the technical field of fluorescent material preparation, and particularly relates to a red fluorescent material and a preparation method thereof.The preparation method comprises the following steps that pseudo-boehmite, a strontium source and a chromium source are weighed, the strontium source and the chromium source are added into an aqueous solution to be dispersed, hydrochloric acid is added till the strontium source and the chromium source are dissolved, then ammonia water is added, and dispersion liquid is obtained; the pseudo-boehmite and dispersion liquid are subjected to ball milling and uniform mixing, a mixture is obtained after the dispersion liquid is filtered out, the mixture is dried and sintered, and the red fluorescent material is obtained.

The invention relates to a river water quality influence evaluation method based on strontium isotope analysis and a radon model. Precise traceability is realized through a strontium isotope model technical method, and meanwhile, the influence of underground water of an irrigation area along a river on river water quality is quantified by applying a radon mass balance model. Specifically, by taking water quality analysis of the Yellow River irrigation area as an example, the method can accurately locate sources of complex pollutants such as carbonate rock weathering, soil mineral decomposition, chemical fertilizer loss and sewage leakage in underground water along the Yellow River irrigation area, solves the problem of confusion of natural and artificial pollution contributions, and fills the blank of underground water-surface water interaction influence quantification.