169results about "Zirconium oxides" patented technology

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.

This invention provides a zirconia-based porous body having a pore diameter suitable for supporting catalytic active species, such as precious metals, small variability in pore diameter, and a sufficient specific surface area even after 12-hour heating at 1000°C. Specifically, the invention provides a zirconia-based porous body in particle form having (1) a pore diameter peak at 20 to 100 nm in the pore distribution by BJH method, a P / W ratio of 0.05 or more wherein W represents half width of the peak and P represents height of the peak in the measured pore distribution curve, and a total pore volume of 0.5 cm3 / g or more; and (2) a pore diameter peak at 20 to 100 nm, the P / W ratio of 0.03 or more, a specific surface area of at least 40 m2 / g, and a total pore volume of 0.3 cm3 / g or more, after heat treatment at 1000°C for 12 hours.

Provided is at least one of: a powder capable of providing zirconia sintered bodies that contain manganese as a main coloring element, assume a black color, have high fracture toughness, and exhibit only a small variation in color tone due to different sintering temperatures; and a method for producing the powder. The powder of the present disclosure is a powder containing zirconia containing yttrium as a stabilizing element, a manganese compound and alumina. The content of the stabilizing element in terms of oxide is 1.3 mol% or more and less than 2.0 mol% based on the total amount of the zirconia and the stabilizing element in terms of oxide. The content of the alumina is 0.2% by mass or more and 1.5% by mass or less based on the total mass of the powder, and the content of the manganese compound is 0.1 % by mass or more and 0.6% by mass or less based on the total mass of the powder.

Provided are: a method for producing a proton-containing oxide, the method comprising reacting a basic oxide with a carboxylic acid melt having at least pKa4 and introducing a proton into the basic oxide to obtain a proton-containing oxide; a dense body of a proton-containing basic composite oxide; a fuel cell; a hydrogen production cell; a hydrogen sensor; or an ammonia synthesis cell; and methods for producing the same.

To provide at least any of a zirconia sintered body of a solid solution of titanium and yttrium with fracture being difficult to propagate as compared to a zirconia sintered body of a solid solution of titanium and yttrium showing transparency and also showing transparency, a manufacturing method thereof, and use thereof.SOLUTION: A zirconia sintered body of a solid solution of titanium and yttrium has a content of yttrium of 3.5 mol% or over and under 6.0 mol%, a content of titanium of 6.0 mol% or over and 18.5 mol% or under, a straight transmittance at a sample thickness of 1±0.1 mm and a measurement wavelength of 600 nm of 45% or over, a ratio of a straight transmittance at a sample thickness of 1±0.1 mm and a measurement wavelength of 600 nm to a total light transmittance at a sample thickness of 1±0.1 mm and a measurement wavelength of 600 nm of 0.70 or over, and a fracture toughness value (KIC) of 1.5 MPa m0.5 or over.SELECTED DRAWING: Figure 1

The application discloses a preparation method of single tetragonal phase zirconia stable at high temperature and ultrahigh temperature. 10 H 14 N2Na2O8 or C 10 H 12 N2Na4O8 as a reaction chelating agent, low-temperature water bath is used to prepare single tetragonal phase zirconia precursor powder, and finally single tetragonal phase zirconia is prepared after high-temperature and ultrahigh-temperature calcination; the application mainly uses common inorganic salts and simple chelating agents, is low in cost, simple and easy to operate, good in repeatability, green and safe, suitable for large-scale production, and can realize that the prepared product is single tetragonal phase zirconia after high-temperature and ultrahigh-temperature calcination, and realizes that the tetragonal phase is stable in a high-temperature and ultrahigh-temperature temperature range.

To provide a liquid composition for forming a BCTZ film, which can control the crystal particle size and form a BCTZ film with stable properties, a method for producing the liquid composition for forming a BCTZ film, and a BCTZ film, and a method for producing the BCTZ film.SOLUTION: A liquid composition for forming a BCTZ film is provided, in which barium carboxylate, calcium carboxylate, a titanium alkoxide and a zirconium alkoxide are mixed in an organic solvent in a molar ratio of Ba:Ca:Ti:Zr=(1-X):X:(1-Y):Y (0.03≤X≤0.20, 0.05≤Y≤0.25) and a stabilizer is added. The barium carboxylate and calcium carboxylate are metal salts of carboxylic acids represented by the general formula CnH2n+1COOH (5≤n≤7). The organic solvent is a mixed solvent containing a carboxylic acid and an acetate.SELECTED DRAWING: None

The present invention provides a method for producing an inorganic particle-containing slurry, by which the number of coarse particles can be sufficiently reduced. The present invention is a method for producing an inorganic particle-containing slurry, which comprises: a step of preparing an inorganic particle dispersion containing inorganic particles and a dispersing medium, and having a pH less than the isoelectric point of the inorganic particles; and a step of adding an alkaline compound to the inorganic particle dispersion in such a manner that the pH does not reach the isoelectric point of the inorganic particles.

The invention relates to a process for producing lithium zirconium mixed oxides by means of flame spray pyrolysis, mixed oxides obtainable by this process and their use in lithium ion batteries.

A positive electrode active material comprises secondary particles, wherein each of the secondary particles includes primary particles, and each of the primary particles includes an olivine-type phosphate compound and lithium zirconate.

A sintered body that includes zirconia containing a stabilizing element; and a plastic deformation region, wherein the stabilizing element includes at least one rare-earth element other than yttrium, and the stabilizing element content is 1.5% or more by mole and less than 3.0% by mole.

A dispersion for polishing containing a zirconium oxide and a polishing aid, wherein the zirconium oxide comprises a monoclinic phase and has a ratio of crystallite size of a monoclinic (-111) side to a monoclinic (111) side ((-111) side / (111) side) of from 0.50 to 0.95. The dispersion for polishing and the powder for polishing of the present invention can be used in a chemical mechanical polishing (CMP) such as a SiC wafer, and can be utilized in a production process of a semiconductor and the like.

To provide at least one out of powders, a manufacturing method thereof, a calcined body obtained from the powders, a sintered body, and manufacturing methods for them; the powders including zirconia as a principal component and at least a transition metal element, and from which a calcined body being able to be obtained, the calcined body having mechanical characteristics more suitable for calcination processing.SOLUTION: Powders of zirconia include a stabilizing element and a transition metal element, where a difference between a minimum value and a maximum value of transition metal element / zirconium is less than 0.25 in a frequency distribution of element ratio in which the transition metal element / zirconium is plotted at 0.005 intervals.SELECTED DRAWING: Figure 4

Provided is at least one of a method for producing easily grindable recycled zirconia from a zirconia sintered body and a method for recycling a zirconia sintered body, by which method the zirconia sintered body can be recycled. A method for producing recycled zirconia includes an ammonia treatment step of subjecting a zirconia sintered body to a heat treatment in an oxygen-containing ammonia atmosphere at a temperature of 800°C or higher and 1200°C or lower. The ammonia treatment step satisfies at least one of a condition (a) below and a condition (b) below. (a) The oxygen-containing ammonia atmosphere has an oxygen concentration of 0.3 vol% or more. (b) The oxygen-containing ammonia atmosphere has an oxygen concentration of 0.2 vol% or more, and the zirconia sintered body has a cubic phase ratio of 3.5% or more.

Provided are at least one of: a method for recycling a zirconia sintered body, which is capable of regenerating a zirconia sintered body that is difficult to be pulverized by pulverizing; a powder obtained thereby; and a use thereof. A powder of zirconia comprising grains. Such a powder is preferably obtained by a production method comprising: a hydrothermal treatment step in which a sintered zirconia body is subjected to hydrothermal treatment at a hydrothermal treatment temperature of 150-400 DEG C (inclusive) with the mass ratio of water to the sintered body being 1.5 or less; and a crushing step in which the sintered body after the hydrothermal treatment is crushed.

The invention discloses a ceramic nanofiber, a preparation method thereof and prepared ceramic aerogel, and the method for preparing the ceramic nanofiber comprises the following steps: 1) mixing and uniformly dispersing an inorganic precursor, a chelating agent, a solvent and a stabilizer to obtain mixed sol; 2) generating linear inorganic polymer sol with activity by controlling hydrolysis and condensation polymerization of an inorganic precursor in the mixed sol; (3) carrying out equilibrium concentration on the linear inorganic polymer sol so as to regulate the viscosity and viscoelasticity of the sol to be in a proper range; and 4) carrying out electrostatic spinning on the sol regulated in the step 3) to obtain precursor fibers, and calcining the precursor fibers to obtain the ceramic nanofibers.According to the method disclosed by the invention, the high-strength doubled ceramic nanofibers can be rapidly prepared, and the doubled ceramic nanofibers can be simply and conveniently assembled into a high-elasticity ceramic aerogel material.

In a method of manufacturing a cathode active material for a lithium secondary battery, a preliminary lithium metal oxide particle is prepared. The preliminary lithium metal oxide particle is cleaned using a boron compound cleaning solution. A cathode active material for a lithium secondary particle includes a lithium metal oxide particle where a ratio of a B+ peak intensity relative to a sum of peak intensities of Li+, B+ and LiB+ fragments by a TOF-SIMS analysis is in a range from 0.03% to 1.5%.

The invention discloses a metal oxide embedded carbon nanotube nano flexoelectric material and a preparation method and application thereof, and the preparation method comprises the following steps: opening a carbon nanotube to obtain an opened carbon nanotube; mixing the open carbon nanotube, hydrolytic salt and water to obtain a hydrolytic salt carbon nanotube solution; carrying out vacuum filtration on the hydrolytic salt carbon nanotube solution, and drying to obtain a hydrolytic salt embedded carbon nanotube material; and carrying out annealing treatment on the hydrolyzed salt embedded carbon nanotube material to obtain the metal oxide embedded carbon nanotube nano flexoelectric material. According to the preparation method provided by the invention, the carbon nanotube confinement space is utilized, the preparation of the nanoscale built-in stress gradient flexural dielectric material is realized, the geometric necessary dislocation density is increased by utilizing the size effect, the flexoelectric effect is amplified, and the application of flexoelectricity in the aspects of organic matter catalytic degradation and energy collection is improved.

This polishing dispersion and this polishing powder can be used in chemical-mechanical polishing (CMP) of a SiC wafer etc., and can be employed in a semiconductor production process etc. Provided is a zirconium oxide sol containing a zirconium oxide particle group exhibiting a layered structure in a scanning electron microscope image.

This invention discloses a lithium replenishing agent coated with a metal-organic framework (MOF), its preparation method, and its application, belonging to the field of lithium-ion batteries. The lithium replenishing agent comprises a matrix and a coating layer. The matrix is ​​lithium ferrite, and the coating layer is a MOF with a thickness of 0.5-10 nm. The MOF is prepared using fluorine-containing and carboxyl-containing compounds as ligands and zirconium tetrachloride as the metal source via a solvothermal method. The preparation method includes the following steps: preparing and activating a lithium ferrite intermediate; adding the activated lithium ferrite intermediate to a buffer solution containing dissolved dopamine hydrochloride to prepare lithium ferrite intermediate @PDA; performing in-situ growth of the MOF to construct a hydrophobic MOF-coated precursor; adding a lithium source to the precursor and performing programmed sintering to obtain the lithium replenishing agent. The lithium replenishing agent provided by this invention achieves excellent air stability, low gas production, and excellent conductivity.

The present invention provides: aggregates wherein dendrite growth of Li metal can be reduced; a sheet; a separator; an electrode; and a power storage device. Aggregates (10) each comprise oxide particles (19) that have a garnet crystal structure containing Li, La and Zr, and inorganic particles (22) that are formed of a typical element and contain Mg. The median diameter of the inorganic particles is 1 / 2 or less of the median diameter of the oxide particles, and the ratio of the inorganic particles to the oxide particles is 1 vol% to 10 vol%. A power storage device (11) comprises the aggregates.

A method for producing a dense perovskite ceramic shaped body containing an alkaline earth metal element, at least one element selected from Ti, Zr and Hf, and oxygen, and having a relative density of 60% or more, the method comprising a contact reaction step in which a precursor shaped body containing a gel containing at least one oxide selected from Ti, Zr and Hf and water alone, and a liquid containing a hydroxide of an alkaline earth metal element are brought into contact. The obtained shaped body is a collection of crystal domains (2) of a perovskite ceramic crystal (1), the crystal domains (2) being connected to each other.

The invention relates to a metal oxide photoresist and a purification method thereof. The purification method comprises the following steps: S1, dissolving a metal oxide crude product containing metal ion impurities in a specific solvent to obtain a crude product solution; s2, applying crystallization driving force to the crude product solution to induce metal oxide crystals to separate out, so as to obtain metal oxide crystals; s3, separating the metal oxide crystal from the crude product solution to obtain a crystal wet cake; s4, washing and drying the crystal wet cake to obtain a high-purity crystal; and S5, dissolving the high-purity crystal in a photoresist solvent to obtain a purified metal oxide photoresist solution. According to the method, the metal ion impurity concentration of the metal oxide photoresist can be stably reduced, and the requirement of the EUV photoetching process on ultra-high purity is met. The purification process is simple and rapid, the purification time is greatly shortened, and the purification efficiency is improved.

The application provides a preparation method of silica-stabilized lanthanum zirconate aerogel, and comprises the following steps: using lanthanum nitrate hexahydrate and zirconium nitrate pentahydrate as precursors, and using propylene oxide as a catalyst to obtain an LZ sol in anhydrous ethanol solvent; using tetraethyl orthosilicate as a precursor, and using hydrochloric acid as a catalyst to carry out hydrolysis in an ethanol and water solvent to obtain an SiO2 sol; dropping the obtained SiO2 sol into the LZ sol drop by drop to obtain a mixed solution, and dropping the mixed solution into propylene oxide gel promoter drop by drop to obtain an LZS sol; the LZS sol is placed in an oven to obtain an LZS gel; and the LZS gel is subjected to aging and supercritical drying to obtain a blocky LZS aerogel. The silica-stabilized lanthanum zirconate aerogel has a unique pyrochlore structure and good thermal stability, and has a very large application prospect in the field of heat preservation and insulation.

To provide a zirconia sintered body that has high impact resistance even in a thin shape having a thickness of 0.5 mm or less, and also has high light-shielding property such that a member serving as a substrate is not visible therethrough.SOLUTION: A zirconia sintered body comprising a stabilizing element, niobium, manganese, and alumina, wherein a crystallite diameter calculated from an XRD peak attributed to the (111) plane of tetragonal zirconia is 25 nm or more and 100 nm or less.SELECTED DRAWING: Figure 1

A ceramic reversible cell including any one or more selected from the group consisting of a perovskite-type metal oxide, a hydrate of the perovskite-type metal oxide and a hydride of the perovskite-type metal oxide, in which the any one or more selected from the group consisting of the perovskite-type metal oxide, the hydrate of the perovskite-type metal oxide, and the hydride of the perovskite-type metal oxide include A (A being any one or more selected from the group consisting of Ba, Sr and Ca), B (B being any one or more selected from the group consisting of Zr, Sn, Ce, Ti and Hf), and M (M being any one or more selected from the group consisting of In, Fe, Cr and Mn) as main metal atoms, and satisfy the predetermined formula and include hydride ions when brought into an equilibrium state by contact with dry hydrogen having a water content of 20 ppm or less in a volume ratio at 500°C to 900°C.

The application discloses a method for preparing nano-oxide powder by solid-phase hot injection, and utilizes inorganic metal salt and organic ligand to prepare metal-organic complex as metal precursor; under inert atmosphere, a synthesis solvent is heated, then the metal precursor is directly added in solid form, heat preservation reaction is carried out, and the organic ligand is recovered; the polar solvent is added into the mixed solution after heat preservation reaction, solid-liquid separation is carried out to obtain solid-phase product and liquid-phase mixed solvent; the nano-oxide powder is obtained by calcining the solid-phase product, and the synthesis solvent and the polar solvent are recovered by separating the liquid-phase mixed solvent. By the solid-phase hot injection, the same amount of synthesis solvent can be converted into more precursor to corresponding high-quality nano-particles without incomplete nucleation or particle agglomeration, the recovery rate of the organic ligand can be adjusted by selecting the synthesis solvent, and the synthesis solvent and the polar solvent in the solution after reaction are recycled.

The invention discloses a simple preparation method of pure tetragonal phase nano zirconium dioxide powder, and belongs to the technical field of nano materials. The preparation method disclosed by the invention is simple in process, cheap in raw materials and low in cost, and the product is pure tetragonal phase zirconium dioxide and does not contain other impure phases. The preparation method provided by the invention is easy to realize industrial production, and the preparation process is pollution-free, does not contain components toxic and harmful to the environment and human bodies, and is more environment-friendly.

At least one of a zirconia sintered body that contributes to the sustainable development goals (SDGs) and has high impact resistance and a method for producing the zirconia sintered body is provided. A zirconia sintered body comprising 4.5% by mole or more and 15.5% by mole or less of a stabilizing element other than yttrium, wherein the stabilizing element contains 0% by mole or more and 8.5% by mole or less of cerium, a cubic phase of zirconia is not contained, and a monoclinic phase ratio is 70% or less.

The utility model relates to the technical field of zirconium oxide preparation, in particular to a preparation device for producing zirconium oxide, which comprises a reaction kettle body, a discharge port arranged at one end of the reaction kettle body, a cover body in threaded connection with one end of the reaction kettle body, a support leg fixedly connected with one end of the reaction kettle body, and an adjusting base in threaded connection with one end of the support leg. One end of the cover body is fixedly connected with a driving motor, and one end of the driving motor is fixedly connected with a transverse-vertical stirring assembly; according to the preparation device for producing the zirconium oxide, disclosed by the utility model, the horizontal and vertical stirring components are arranged in the reaction kettle body to realize sufficient horizontal and vertical stirring of a mixed solution in the reaction kettle body, so that the problem that the mixed solution on the upper layer and the lower layer is difficult to fully react due to single horizontal stirring is avoided; and the temperature in the reaction kettle body is constantly controlled to the optimum reaction temperature by utilizing the temperature sensor and the heating rod, so that the reaction efficiency is effectively improved, and the zirconium oxide preparation efficiency is improved.