119 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 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 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.

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 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.

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.

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.

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.

The invention discloses a cerium-doped modified pre-sintered material, ferrite prepared by using the pre-sintered material and a preparation method and application of the ferrite, and belongs to the technical field of permanent magnetic ferrites.The cerium-doped modified pre-sintered material is prepared by adopting a hydrothermal method, the dielectric constant of water is reduced and the ion product is increased at high temperature and high pressure, Fe < 3 + > can be promoted to be hydrolyzed to generate oxyhydroxide (alpha-FeOOH), and the performance of the ferrite is improved. Under the hydrothermal condition, alpha-FeOOH is converted into alpha-Fe2O3 after being dehydrated, Sr < 2 + > and Ce < 3 + > are diffused along alpha-Fe2O3 crystal lattice gaps through a solid-liquid interface diffusion mechanism, and finally the cerium-doped modified strontium ferrite is formed. Tiny crystal nucleuses obtained through the hydrothermal reaction can be deposited on the surfaces of large crystal grains, and stable nano-particles with the uniform size are formed.

The invention relates to the technical field of optical atomic clocks, and discloses a multi-mode magnetic field generation and regulation device and method for a strontium atom optical clock, and the device comprises a three-dimensional magnetic field coil, a magnetic field control system, and a magneto-optical trap. The three-dimensional magnetic field coil comprises an X-direction magnetic field coil, a Y-direction magnetic field coil and a Z-direction magnetic field coil; the X-direction magnetic field coil, the Y-direction magnetic field coil and the Z-direction magnetic field coil are mutually orthogonal and are respectively arranged along opposite positions to form a cubic framework, and the magneto-optical trap is positioned in the cubic framework; the magnetic field control system is electrically connected with the X-direction magnetic field coil, the Y-direction magnetic field coil and the Z-direction magnetic field coil. The technical problems that an existing strontium atom optical clock system is complex in structure and high in power consumption and thermal load, and time sequence characteristics used by a magnetic field in the operation process of the optical clock are not fully utilized are solved.

This invention provides high-purity metallic strontium in which the content of the impurity nickel (Ni) has been reduced. [Solution] Metallic strontium with a Ni content of 0.05 wt ppm or less.

A dielectric composition includes a main component containing tantalum and at least one of barium or strontium, and a subcomponent containing calcium and silicon.

The present invention provides novel infrared-transmitting material particles that can block visible light while transmitting infrared light. [Solution] Composition formula: A x Bi y O z It contains a complex bismuth oxide represented by, In the above compositional formula, element A is one or more elements selected from calcium, strontium, and barium, Bi is bismuth, and O is oxygen. The above compositional formula comprises infrared-transmitting material particles where x, y, and z satisfy the relationships 2.5 ≤ z / y ≤ 4.0 and 0.6 ≤ x / y ≤ 1.8.

An improved atomized powder metal material containing an increased amount of free graphite after heat treatment and / or sintering is provided. The powder metal material is typically a ferrous alloy and includes carbon in an amount of 1.0 wt. % to 6.5 wt. % and silicon in an amount of 0.1 wt. % to 6.0 wt. %, based on the total weight of the powder metal material. The powder metal material can also include various other alloying elements, for example at least one of nickel (Ni), cobalt (Co), copper (Cu), tin (Sn), aluminum (Al), sulfur (S), phosphorous (P), boron (B), nitrogen (N), chromium (Cr), manganese (Mn), molybdenum (Mo), vanadium (V), niobium (Nb), tungsten (W), titanium (Ti), tantalum (Ta) zirconium (Zr), zinc (Zn), strontium (Sr), calcium (Ca), barium (Ba) magnesium (Mg), lithium (Li), sodium (Na), and potassium (K).

A high-purity metallic strontium having a reduced content of Co (cobalt), which is an impurity, is provided by metallic strontium having a Co content of 0.01 wtppm or less.

The invention belongs to the technical field of secondary batteries, and particularly discloses a strontium-doped nickel-based Prussian blue positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving a sodium salt of a polydentate carboxylic acid ligand, a reduction protective agent, a strontium salt and a nickel salt in deionized water to obtain a metal ion source solution; dissolving ferrous cyanide and a sodium supplementing agent in deionized water to obtain a cyano iron source solution; the method comprises the following steps: mixing a metal ion source solution and a cyano iron source solution, stirring to form a precipitate, standing and aging, and then carrying out solid-liquid separation to obtain a precipitate; and washing and drying the obtained precipitate to obtain the strontium-doped nickel-based Prussian blue positive electrode material. Strontium doping is introduced, so that the cycling stability of the nickel-based Prussian blue positive electrode material is remarkably improved; the preparation method is low in cost, high in efficiency, excellent in cycle performance and wide in application prospect when being used for a secondary battery.

The present application discloses an inorganic salt phase change material and a preparation method therefor and a use thereof. An inorganic salt phase change material composition comprises the following components: 89.0 wt.% to 92.5 wt.% of a hydrated inorganic salt A, 2.0 wt.% to 5.0 wt.% of a nucleating agent, 0.4 wt.% to 1.0 wt.% of a nucleation promoter, 0.2 wt.% to 2.7 wt.% of a thickener, and 1.5 wt.% to 5.0 wt.% of a thermally conductive filler. The nucleating agent is selected from at least one of a sodium salt, a strontium salt, and a metal oxide. The nucleation promoter is selected from at least one of non-metallic mineral materials.

The invention discloses high-temperature anti-oxidation iron-nickel-based alloy powder for 3D printing. The alloy powder is characterized by comprising the following components in percentage by weight: 28% of Ni, 7.0% of Co, 9.0% of Mo, 14.5% of Cr, 0.5% of Ti, 1.2% of Al, 3.0% of W, 0.15% of C, 37.21% of Fe, 0.6-0.8% of vanadium V, 2.2% of Nb, 0.05% of strontium and 0.05% of lanthanum, 0.05% of Zr, 0.01% of B and 0.25% of Ta, and impurities are controlled as follows: less than or equal to 0.015% of oxygen (O), less than or equal to 0.010% of nitrogen (N), less than or equal to 0.015% of sulfur and less than or equal to 0.015% of phosphorus. The preparation method of the alloy powder comprises the steps of material preparation, smelting and argon atomization, and the alloy powder has good characteristics, is applied to 3D printing, is remarkable in softening resistance in a high-temperature state, and is an excellent material capable of being used for aerospace and injection molds.

The invention provides a waste salt treatment process and system based on a melt crystallization method, the waste salt treatment process is a process combining pulling crystallization, zone condensation and cold finger / cooling plate crystallization, and matrix salt is recovered from a chloride molten salt system containing strontium element and / or barium element and / or cesium element. The invention aims to solve the problems that the treatment scale and the product purity are difficult to consider at the same time, the volatilization loss is serious, and dual targets are difficult to realize under complex working conditions in the existing dry post-treatment waste salt melt crystallization purification technology. A waste salt melt crystallization purification technology which can adapt to complex working conditions, give consideration to high purification efficiency and high resource recovery rate and meet the large-scale treatment requirement is researched and developed, radioactive waste salt containing splitting elements is treated through process fusion, efficient purification of the waste salt is finally achieved, and the high removal rate and recovery rate are achieved.

A purification system for high-hardness strontium-containing natural mineral water relates to the field of water treatment technology. The invention comprises a pretreatment unit, an ultrafiltration unit, a nanofiltration unit, a blending and adjustment unit, and an ozone ultraviolet disinfection unit connected sequentially along the water flow direction. The pretreatment unit removes suspended solids and colloidal particles from the raw water; the ultrafiltration unit retains beneficial minerals such as strontium; the nanofiltration unit efficiently retains calcium and magnesium ions to reduce hardness; the blending and adjustment unit automatically adjusts the ratio of ultrafiltration to nanofiltration permeate through an online strontium content detector and a flow control valve, precisely controlling the strontium content in the finished product water; and the ozone ultraviolet disinfection unit ensures microbial safety. This invention effectively reduces the hardness of raw water, prevents sedimentation, and stably controls the strontium content within the standard range, maintaining the mineral balance and good taste of the finished water. It is suitable for the large-scale, stable production of high-hardness strontium-containing natural mineral water.

A method of increasing porosity of graphitic carbon black comprises combining graphitic carbon black having a Raman planar size (La) of at least 20 Angstroms with at least 100 ppm of an alkaline earth element selected from strontium, barium, and a mixture of both to form a mixture, and contacting the mixture with an etchant at a temperature of 900-1400° C. until 2%-85% of the mass of the carbon black is lost.

This invention belongs to the field of intelligent piezoelectric materials technology, and discloses a grain-oriented piezoelectric ceramic material and its preparation method. The grain-oriented piezoelectric ceramic material is... <001> Oriented and ferromagnetic barium titanate / strontium-based template seed crystals, with the general formula: X Pb 1‑1.5x R x (B1,B2)O3- Y Pb 1‑y A y (B1,B2)O3-(1- X - Y-Z PbB3O3- Z The ceramic matrix of PbTiO3, wherein A is one or more of barium, strontium, calcium, and bismuth; B1 is one or more of magnesium, nickel, indium, and scandium; B2 is one or more of niobium, tantalum, and antimony; B3 is zirconium or tin; and R is one or more of Sm, La, Nd, Eu, Ce, Pr, Dy, and Er. x is between 0.001 and 0.2, y does not exceed 0.1; X is between 0.1 and 0.3, Y is between 0 and 0.2, and X+Y+Z=1. The raw materials are calcined according to the general formula to obtain perovskite powder. Subsequently, through casting, lamination, cutting, debinding, and calcination, the grain-oriented piezoelectric ceramic is finally obtained. This process can achieve high piezoelectric performance while maintaining a high Curie temperature, solving the problem of the incompatibility between high piezoelectric performance and high phase transition temperature in materials.

The application relates to the technical field of permanent ferrite preparation, in particular to a method for preparing strontium ferrite by a multi-field coupling auxiliary molten salt method. First, a chemical coprecipitation method is improved to obtain a mixture containing an excess precipitant, inorganic salt and strontium ferrite precursor; then the mixture is subjected to heat treatment under multi-field coupling; finally, strontium ferrite powder is obtained after washing and drying. The application simplifies the chemical coprecipitation process, avoids Sr loss and realizes in-situ salt formation; a multi-element molten salt system is constructed during heat treatment, and an alkali-containing molten salt system with activation is proposed; in the molten salt liquid phase environment, multi-physical fields such as magnetic fields and ultrasonic vibration force fields are cooperated to control the orientation and growth of grains, new driving force and fast channels are provided for ion diffusion, and the rapid synthesis of strontium ferrite and the control of microstructure and size are realized in a low temperature and short time.

The invention provides a gradient extraction method of produced water associated resources. According to the produced water associated resource gradient extraction method, a pre-separation step is designed, monovalent ions and divalent ions in produced water are preliminarily separated, bromine extraction, strontium extraction and lithium extraction procedures are organically connected in series or in parallel, the strontium and lithium recovery steps can be synchronously carried out, the technological process is simpler, energy consumption is lower, and the production efficiency is improved. And efficient stepped extraction of bromine, lithium, strontium and other elements with the content reaching a certain abundance and exceeding the comprehensive industrial mining grade in the produced water is comprehensively realized in a complete set.