643results about "Zirconium oxides" patented technology

A zirconia-based powder material, wherein [(Vp10-100) / (Vp100-6000)] satisfies the following Formula [1], provided that in a pore diameter distribution determined by a mercury intrusion method, a pore volume in a range of a pore diameter of X nm or more and less than Y nm is taken as VpX-Y:0.4≤[(Vp1⁢0-1⁢0⁢0) / (Vp100-6⁢0⁢0⁢0)]≤1.Formula [1]

The invention discloses acid-resistant calcium carbonate and a preparation method thereof, and belongs to the technical field of calcium carbonate filler production. According to the invention, industrial waste carbide slag is used as a calcium source, and calcium hydroxide slurry is obtained through impurity removal; then adding sodium polyacrylate and sodium hexametaphosphate, stirring and dispersing, then introducing carbon dioxide for carbonization, adding a surfactant for ultrasonic activation after carbonization, and finally sequentially adding zirconium oxychloride and sodium silicate to prepare the acid-resistant calcium carbonate. The defects of traditional silicon dioxide and titanium dioxide coated calcium carbonate products are overcome, the prepared calcium carbonate product is compact and uniform in coating layer and good in stability, meanwhile, excellent acid resistance and mechanical property are considered, the calcium carbonate can be suitable for more acid environments, and the application range of calcium carbonate is effectively widened.

The invention provides a lithium manganese iron phosphate positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of new energy. According to the lithium manganese iron phosphate positive electrode material provided by the invention, the amorphous precursor and the high-crystallization precursor are used as raw materials, and the high-crystallization precursor causes a relatively high specific surface area of the material and affects the processability; the amorphous precursor can improve the compaction density and the specific surface area of the material, and the capacity and the cycle performance of the lithium manganese iron phosphate positive electrode material are ensured by combined use of the two precursors. The combination of elements with different valence states is used, so that the doping and coating effects are achieved at the same time, and the performance of the material is synergistically improved; elements with relatively low valence states are easily doped in a lithium manganese iron phosphate crystal structure, so that the capacity of the material is improved; and elements with relatively high valence states are distributed on the surfaces of lithium manganese iron phosphate particles, so that the stability of the surface structure of the material is improved.

This invention discloses a method for preparing high-purity zirconium oxide, belonging to the field of compound preparation technology. The method provides a breakthrough adjustment of the final concentration state and the cooling process after concentration and evaporation of an acidic zirconium oxychloride solution under the action of an oxidant. Simultaneously, crystallization is achieved through a two-stage concentration and evaporation process, followed by calcination to obtain hafnium-free zirconium oxide. The resulting zirconium oxide not only has a high yield but also high purity. Furthermore, the technical solution of this invention avoids the generation of ammonia nitrogen wastewater as in existing technologies, thus not only avoiding environmental impact but also significantly reducing production costs through the recycling of hydrochloric acid condensation, achieving a green and environmentally friendly effect.

To provide a calcined body that is processed easier than a conventional calcined body and where differences in hardness between production lots are suppressed.SOLUTION: A calcined body comprises: at least one first transition metal element selected from the group consisting of manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), and silver (Ag); a coloring element of at least one of a lanthanoid rare earth element and a second transition metal element different in kind from the first transition metal element; and zirconia containing a stabilizing element. A content of the first transition metal element is 100 mass.ppm or more, a content of the second transition metal element is less than 100 mass.ppm, and an absolute value of a difference in hardness relative to a hardness of a calcined body obtained from a commercially available powder is 10 HV or less.SELECTED DRAWING: None

The invention relates to an oxygen-deficient nano material and a solid-phase melting zinc thermal reduction preparation method and application thereof, zinc powder is taken as a reducing agent, target metal oxide such as anatase type TiO2 and zinc powder are uniformly mixed, then mild high-temperature annealing treatment is carried out in an inert gas atmosphere, a product is washed by dilute acid / alkali, and the oxygen-deficient TiO2-x nano material is obtained. Similarly, oxygen deficient SnO2-x, ZrO2-x, and BaTiO3-x materials can be produced by such methods. Compared with the existing technologies of high-temperature hydrogen reduction, complex structure carbonization, solvothermal reduction and the like for preparing the oxygen-deficient nano material, the preparation method disclosed by the invention adopts a solid-phase molten zinc thermal reduction technology, takes environment-friendly and low-cost zinc powder as a reducing agent, and prepares the oxygen-deficient nano material by utilizing a solid-phase molten zinc thermal reduction process at a mild high temperature; the preparation method has the advantages of simple process, no special requirement on production equipment, processing universality and industrial production compatibility, successfully prepares a series of defect nanometer materials with adjustable oxygen defect concentration, and effectively prolongs the cycle life of the zinc battery by applying the defect nanometer materials to the negative electrode protection of the zinc ion battery.

The invention discloses a preparation method of nano zirconium dioxide dispersion liquid for display packaging, which comprises the following steps: adding a zirconium source and alkali into deionized water, uniformly stirring, and carrying out hydrothermal reaction to obtain nano zirconium dioxide particles; repeatedly washing the nano zirconium dioxide particles with deionized water to completely remove salt and alkali, and heating the nano zirconium dioxide particles in an organic acid solution at a certain temperature for a certain time to obtain a nano zirconium dioxide organic acid dispersion liquid; the oil / water property of the nano zirconium dioxide organic acid dispersion liquid is changed by using a dispersing agent and a coupling agent, so that nano zirconium dioxide particles can be dispersed in an organic solvent, and the nano zirconium dioxide dispersion liquid is obtained; nano zirconium dioxide particles in the nano zirconium dioxide dispersion liquid have the characteristics of high refractive index, small particle size, uniform form and concentrated particle size distribution. And the haze can be reduced and the original transmittance of the resin can be maintained when the resin is applied to packaging. And meanwhile, the optical waveguide has the characteristics of low viscosity, long-time stability and no settlement, and can meet the requirements of industrial packaging and nano-imprinting of optical waveguides.

The invention provides a coated modified lithium cobalt oxide material, a preparation method thereof, a positive electrode and a lithium ion battery. The preparation method comprises the following steps: providing a mixture, wherein the mixture sequentially comprises first lithium cobalt oxide particles, a coating agent and second lithium cobalt oxide particles from bottom to top; sequentially carrying out first mixing, second mixing and third mixing on the mixture; and sintering to obtain the coated modified lithium cobalt oxide material. The D50 particle size of the first lithium cobalt oxide particles is larger than that of the second lithium cobalt oxide particles; the mixing rotating speeds of the first mixing, the second mixing and the third mixing are sequentially increased. In the lithium cobalt oxide coating modification process, the positions of the first lithium cobalt oxide particles, the second lithium cobalt oxide particles and the coating agent in the mixture in the vertical direction are designed to form a sandwich structure, and a three-stage mixing process is combined, so that the mixing uniformity of the coating agent and the lithium cobalt oxide material is remarkably improved, and the coating performance of the lithium cobalt oxide material is improved. And uniform coating of the coating element on the surface of the lithium cobalt oxide material is realized.

The invention provides a PDA-ZrO2 coated zinc anode, a preparation method thereof and a battery, and belongs to the technical field of electrochemical energy storage materials. According to the zinc anode, a polydopamine-zirconium dioxide composite protective layer is constructed on the surface of a zinc substrate. According to the composite layer, a polydopamine bottom layer is formed through self-polymerization of dopamine on the surface of the zinc foil, and then a zirconium dioxide layer is introduced on the polydopamine bottom layer through an in-situ mineralization method. The PDA-ZrO2 composite layer disclosed by the invention has the main advantages that the PDA-ZrO2 composite layer ingeniously combines the strong adhesive force, excellent flexibility and ion regulation and control capability of polydopamine and the high mechanical strength and chemical stability of zirconium dioxide. The synergistic effect of'soft and hard combination 'can effectively homogenize zinc ion flow, inhibit dendritic crystal growth and block side reaction caused by water molecules, so that the interface stability of the zinc metal anode is remarkably improved, and the cycle life of the zinc metal anode is remarkably prolonged. The preparation method is simple in process, mild in condition and easy for large-scale production.

To provide an electrolyte particle for use in the manufacture of a solid oxide electrochemical cell, which is a solid electrolyte sintered body constituting a solid oxide electrochemical cell and which can be efficiently manufactured by sintering a densified sintered body having a high relative density at, for example, 1200°C or lower, and a dispersion liquid containing the electrolyte particle.SOLUTION: The present invention relates to an electrolyte particle containing at least one selected from (A) stabilized zirconia consisting of 3.0 to 10.0 mol% scandium oxide, 0 to 2.0 mol% cerium oxide, and 88.0 to 97.0 mol% zirconium oxide, (B) stabilized zirconia consisting of 0.5 to 15.0 mol% yttrium oxide and 85.0 to 99.5 mol% zirconium oxide, and (C) stabilized zirconia consisting of 0.5 to 15.0 mol% ytterbium oxide and 85.0 to 99.5 mol% zirconium oxide, and having a volume average particle diameter of 50 to 150 nm measured using a laser diffraction method.SELECTED DRAWING: Figure 1

The purpose of the present disclosure is to provide a method for recovering a solid state electrolyte from an all-solid-state battery, which simultaneously recovers rare metals through a hydrometallurgical process. In order to achieve the purpose, an aspect of the present disclosure provides a method for recovering a solid state electrolyte from an all-solid-state battery, the method comprising steps of: (a) crushing or grinding the all-solid-state battery; (b) acid leaching the crushed or ground all-solid-state battery to form a leaching solution; (c) adding a first precipitant to the leaching solution to separate the leaching solution into a first precipitate and a first leachate; (d) adding a pH modifier to the first leachate to separate the first leachate into a second precipitate and a second leachate; and (e) adding a second precipitant to the second leachate to recover a third precipitate.

The invention relates to the technical field of casting powder, in particular to special casting powder for 2520 heat-resistant stainless steel and a preparation process of the casting powder. The high-temperature-resistant ceramic comprises the following components: 30-40 parts by weight of calcium oxide, 15-20 parts by weight of aluminum oxide, 8-12 parts by weight of zirconium oxide powder, 5-10 parts by weight of silicon dioxide, 10-15 parts by weight of manganese oxide, 3-5 parts by weight of titanium dioxide, 3-5 parts by weight of calcium fluoride, 8-10 parts by weight of a stabilizer and 3-5 parts by weight of rare earth element oxide. The zirconium oxide powder is prepared from zirconium chloride and yttrium nitrate through a coprecipitation method; the stabilizer is obtained by depositing aluminum oxide and silicon dioxide on the surface of magnesium oxide; the rare earth element oxide is a mixture of cerium oxide and lanthanum oxide. A layer of aluminum oxide and silicon dioxide composite coating is deposited on the surface of magnesium oxide, a layer of compact physical barrier is formed on the surface of magnesium oxide, erosion of harmful components in slag to magnesium oxide is effectively prevented, and the corrosion resistance of magnesium oxide is remarkably improved.

The invention discloses a flame synthesis preparation system and method for a yttrium-stabilized zirconia nano-powder material. The system comprises a flame synthesis module, a raw material conveying module and a powder collecting module, the method comprises the following steps: 1, preparing a precursor solution synthesized by atomizing zirconium oxide nano powder; 2, preparing a precursor solution synthesized by atomizing yttrium oxide nano powder; and step 3, performing atomization synthesis to obtain the yttrium-stabilized zirconia powder material. According to the flame synthesis preparation system and method for the yttrium-stabilized zirconia nano-powder material, the high-performance nano-powder material is synthesized by adopting an atomized flame synthesis method, and the flame synthesis preparation system and method have the advantage that zirconia and yttrium oxide are uniformly doped.

The invention relates to the technical field of lithium ion batteries, in particular to a low-temperature positive electrode material, a preparation method thereof, a positive plate and a lithium ion battery. The low-temperature positive electrode material comprises a base material and a coating layer, the preparation raw materials of the low-temperature positive electrode material comprise a first precursor and a second precursor, and the mass ratio of the first precursor to the second precursor is n; n, the average size r of single crystal particles of the low-temperature positive electrode material, the pole piece compaction density PD of the positive electrode piece containing the low-temperature positive electrode material, and the particle size d99 and particle size dmin of the low-temperature positive electrode material meet the condition that (n * PD * d99) / (dmin * r) is greater than or equal to 30 and less than or equal to 100. The low-temperature positive electrode material is low in cost and good in low-temperature charge-discharge performance.

The invention discloses a method for preparing hafnium oxide from hafnium oxalate feed liquid through an oxidation precipitation method, and belongs to the technical field of hydrometallurgy. The specific method comprises the following steps: adding an oxidizing agent into hafnium oxalate feed liquid to destroy oxalate ions in hafnium oxalate so as to enable hafnium to form hydroxide precipitates; and separating the generated white precipitate, and roasting at high temperature to obtain hafnium oxide. The strong oxidant used in the method is low in cost, high in precipitation efficiency, green, environmentally friendly, free of large pollution to equipment and the environment and wide in application range. The method is simple in process, does not involve a complex process flow, does not need precise equipment, avoids a large amount of alkali liquor required by metal ion precipitation, is simpler in process flow, higher in efficiency and lower in cost, avoids the generation of a large amount of wastewater, and is very environment-friendly. And meanwhile, the process is wide in application range and suitable for various oxalic acid metal feed liquid.

The invention discloses multi-component composite doped zirconium oxide powder for a solid fuel cell and a preparation method of the multi-component composite doped zirconium oxide powder, and belongs to the technical field of solid fuel cells. The process comprises the following steps: mixing zirconium oxychloride with a stabilizer soluble salt and a composite additive, adding water, heating and hydrolyzing to obtain a mixed solution, continuously stirring, adjusting the pH value, filtering, cleaning and drying to obtain mixed powder A; zirconium oxychloride, carbon nanotubes and an organic framework are mixed and modified, a modified mixture, yttrium oxide, calcium oxide and magnesium oxide are mixed and ground, and mixed powder B is obtained; and grinding and mixing the mixed powder A and the mixed powder B, and carrying out two-step calcination to obtain the multi-component composite doped nano zirconium oxide powder. The nano zirconium oxide powder disclosed by the invention has relatively high oxygen ion conductivity, can keep excellent stability in a high-temperature environment, meets the high-performance requirements of various solid fuel cell electrolytes, and has good market competitiveness.

The invention discloses a preparation method of metal oxide nano-particles with controllable particle sizes, and belongs to the field of nano-material preparation. According to two modes of existing literature data and experimental synthesis, a data set of process parameters and nano metal oxide particle size distribution in the preparation process is obtained; variables and product particle sizes in the database are processed through calculation and analysis methods such as one-heat coding, data normalization and model explanatory analysis, a prediction model is constructed, and the prediction model is embedded into a Bayesian optimization algorithm to construct a key process parameter reverse design platform; according to the target particle size required to be synthesized, synthesis process parameters can be obtained by utilizing a reverse design platform, so that the metal oxide is prepared, and the particle size controllable synthesis of the three nanoparticles of titanium oxide, zirconium oxide and cerium oxide is verified through experiments.

The invention relates to the technical field of battery positive electrode materials, discloses a manganese-based battery positive electrode material precursor as well as a preparation method and application thereof, and belongs to the technical field of battery preparation. According to the technology for preparing the manganese-based battery positive electrode material precursor, a solid-phase method is mainly adopted, a high-temperature melting technology is adopted, the manganese-based positive electrode material is subjected to doping modification through multiple elements at the same time, then surface coating is carried out, the density of the synthesized positive electrode material is improved, the structural stability of the synthesized positive electrode material is enhanced, and the morphology, the crystal face and the crystal boundary of the positive electrode material are optimized; the side reaction between the crystal interface of the positive electrode material and electrolyte is inhibited, the service life is prolonged, and the safety performance during use is enhanced. A small amount of water vapor and carbon dioxide gas generated in the preparation process are discharged at high altitude, so that the environment is not polluted.

The invention discloses a preparation method of a bifunctional heterojunction catalyst for AEM electrolyzed water. The method comprises the following steps: step 1, mixing multi-walled carbon nanotubes, deionized water, absolute ethyl alcohol and inorganic acid; step 2, putting the mixed solution in the step 1 into an ultrasonic machine to form a porous structure and more active adsorption sites; step 3, carrying out freeze drying treatment on the mixed solution treated in the step 2; step 4, mixing the dried multi-walled carbon nanotubes with acetylacetone salt, and uniformly grinding the mixed powder; and step 5, putting the powder obtained in the step 4 into a tubular furnace, and carrying out heat treatment in the atmosphere of H2 / Ar to obtain the PtFeCoNiMoZr / ZrO heterojunction catalyst. The catalyst has a remarkable catalytic effect on HER and OER reactions, and meanwhile, stable electrolysis which stably runs for 200 hours in an AEM electrolytic cell under the current density of 1200 mA / cm < 2 > is successfully realized.

The invention relates to nano-scale special zirconia powder and a preparation method thereof, and the preparation method comprises the following steps: S1, adding zircon salt, micromolecular polyol, a chelating agent, a surfactant and propylene glycol dimethyl ether into deionized water to prepare a zircon salt solution; s2, dropwise adding the zirconium salt solution into a precipitant for precipitation reaction; s3, octanoic acid is added, stirring is conducted for 1-2 h, ultrasonic treatment is conducted for 20-30 min, and Zr (OH) turbid liquid is obtained; s4, enabling the Zr (OH) turbid liquid to pass through an ion resin column, then acidifying, filtering and washing for multiple times; s5, carrying out ball milling treatment; s6, spraying powder and drying; and S8, calcining to obtain the nano-scale special zirconium oxide powder. According to the nanoscale special zirconium oxide powder and the preparation method thereof, the problems of purity, dispersity and crystal phase stability of nano zirconium oxide are solved through precipitant optimization, purification optimization, low-temperature crystal phase control and the like, a reliable path is provided for industrial production, and the application prospect is wide.

Provided are a granular powder with which a molded body having high strength can be obtained by a press molding method without necessarily requiring detailed composition control of organic components in a raw material powder slurry that is subjected to granulation, and / or an easy production method therefor. Provided is a ceramic granular powder comprising a ceramic powder and a binder, and having a peak top at 1730±20 cm-1 in a per-unit-mass infrared spectrum of the binder, the absorption peak intensity being 0.023 count or more.

Preparation of capped metal oxide nanocrystals comprising a metal oxide shell that are photocatalytically and thermally stable and their dispersions in monomers, oligomers, and polymers, as well as the resulting formulations and nanocomposite films. These nanocrystals are highly monodisperse with nanocrystal size between 3-100 n. Resultant formulations incorporating these nanocrystals and a matrix material are highly stable and result in nanocomposites that have high refractive index, are highly transparent, have minimal to no change in absorption upon thermal or UV processing and are optically transparent in the visible wavelengths with very little or no scattering.

The invention discloses a preparation method of a composite material, the composite material, a photoelectric device and a display device. The preparation method of the composite material comprises the following steps: providing a precursor solution, wherein the precursor solution comprises Mxene, a metal cation source and a first solvent; carrying out hydrothermal treatment to obtain an inorganic semiconductor particle / Mxene composite material solution; the inorganic semiconductor particle / Mxene composite material solution is subjected to microwave treatment, the composite material is obtained, and the composite material comprises inorganic semiconductor particles and Mxene quantum dots. According to the preparation method of the composite material, the inorganic semiconductor particles and the Mxene quantum dots have relatively strong electric field stability, so that the photoelectric device comprising the inorganic semiconductor particles and the Mxene quantum dots has relatively good luminescence performance.

Preparation of capped metal oxide nanocrystals containing photocatalytically and thermally stable metal oxide shells, and their dispersions in monomers, oligomers, and polymers, and the resulting formulations and nanocomposite films. These nanocrystals are highly monodisperse, with nanocrystal sizes between 3-100 nm. The resulting formulations incorporating these nanocrystals and matrix materials are extremely stable, have high refractive indices, are highly transparent, and undergo minimal to no change in absorbance upon thermal or UV treatment, resulting in nanocomposites that are optically transparent at visible wavelengths and have very little or no scattering.

The invention relates to the field of crystallizer casting powder, and provides crystallizer casting powder for low-carbon steel and a preparation method thereof.The crystallizer casting powder for the low-carbon steel is prepared from, by weight, 50-60 parts of pre-melting materials, 5-10 parts of wollastonite, 5-10 parts of cryolite, 10-15 parts of fluorite, 2-4 parts of bauxite, 1-3 parts of glass powder, 1-3 parts of modified carbon black and 2-5 parts of graphite; and 2-6 parts of an adhesive. The crystallizer casting powder for low-carbon steel provided by the invention has proper melting speed and viscosity, and has better commercial application value.

The invention relates to the technical field of preparation of a sodium ion battery positive electrode material, in particular to a method for activating oxidation reduction of layered oxide oxygen ions by adopting ZrO2 coating and adopts a resonance mode of gradient rotation and revolution (gradient rotation resonance) to enable a very small amount of ZrO2 to be uniformly dispersed in layered oxide particles. Therefore, ZrO2 is uniformly coated on the surface of the layered oxide; the synergistic effect of ZrO2 coating and Zr < 4 + > doping can catalyze the oxidation-reduction reaction of oxygen ions of the layered oxide within the voltage range of 2-4 V, the dissolution of the oxygen ions is inhibited while the extra discharge gram specific capacity is provided, and the interface stability of the material is improved.

There is provided a layered body that has gradations in translucency and color allowing the layered body to give an impression similar to that of natural teeth and with which the chipping of the surface layer (layer closer to the incisal edge of the dental restoration) can be reduced.The layered body comprises a surface layer containing zirconia containing at least one stabilizing element and a composition-gradient layer composed of two or more unit layers. The unit layers each contain at least one coloring element and zirconia containing at least one stabilizing element, and the composition-gradient layer is constructed as a result of the unit layers being stacked in such a manner that the amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in the composition-gradient layer remains unchanged or decreases from the surface layer toward the surface of the layered body opposite the surface layer. The amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in the surface layer is smaller than the amount of the stabilizing element in the zirconia containing at least one stabilizing element contained in a first composition-gradient layer, which is one of the unit layers constituting the composition-gradient layer and is adjacent to the surface layer.

The present invention provides at least any of: a method for recycling a sintered zirconia object, the method making it possible to recycle sintered zirconia objects, which are difficult to powder by pulverization; a powder obtained by the method; and a use of the powder. The powder is a zirconia powder composed of crystalline particles. Such powder is preferably obtained by a production method including: a hydrothermal treatment step in which a sintered zirconia object is hydrothermally treated at a hydrothermal treatment temperature of 150-400°C so that the mass ratio of water to the sintered object is 1.5 or less; and a disaggregation step in which the sintered object after the hydrothermal treatment is disaggregated.

The invention discloses a method for preparing high-zirconium-content silicon carbide from lignite, and relates to a preparation method of high-zirconium-content silicon carbide. The invention aims to solve the problems of non-uniform product distribution and poor performance improvement effect caused by the fact that zirconium compounds are introduced by adding the zirconium compounds into existing silicon carbide in the later period. The method comprises the following steps: 1, preparing a zirconic acid organic matter solution; 2, uniformly mixing a silicon source and lignite powder, adding the mixture into the zirconic acid organic matter solution, quickly adding deionized water, and stirring and reacting at room temperature; 3, high-temperature calcination; 4, removing carbon; and 5, grinding, sieving and carrying out ultrasonic treatment. The method is used for preparing the high-zirconium-content silicon carbide from the lignite.

Provided is a solid electrolyte containing a boron oxide containing Li, an element R selected from the group consisting of Yb, Er, Ho, Tm and La, an element A selected from the group consisting of Al, Fe, Mn and Ga, and an element M selected from the group consisting of Zr and Ce.