45 results about "Zirconium doping" patented technology

The invention relates to a zirconium-doped vanadium-based oxide catalyst for selectively catalyzing and reducing the nitrogen oxide through ammonia, and a preparation method thereof. The catalyst is a metal oxide catalyst which is formed by loading zirconium and vanadium oxide onto the surface of titanium tungsten powder. Through the zirconium doping method, the catalytic properties such as high-temperature stability of the traditional vanadium-based catalyst and the N2 (nitrogen) generation selectivity can be greatly improved, the prepared zirconium-doped vanadium-based oxide catalyst is suitable for a nitrogen oxide catalytic purifying device adopting the diesel exhaust as a representative movable resource and the smoke of a coal plant as a representative fixed source.

The invention discloses a zirconium doped cerium vanadate denitration catalyst which is characterized in that the denitration catalyst is a nano material having a rodlike or granular structure, wherein the mole ratio of zirconium doping amount to metal cerium is x:(1-x), and x is larger than 0.05 and less than 0.8. The invention also discloses a preparation method and application of the zirconium doped cerium vanadate denitration catalyst. The catalyst is prepared by adopting a hydrothermal process, is wide in operating temperature window, can reach NOx removing rate of 80% or above at the temperature of 150-375 DEG C, also has the advantages of good thermal stability, excellent H2O and SO2 poisoning resistance, simple preparation process, low cost and the like, is suitable for treatment of nitric oxide in a fixed source and a moving source and is applicable to practical application.

The invention relates to a titanium and zirconium co-doped carbon-coated lithium iron phosphate material and a preparation method and application thereof, the chemical expression of the material is Li1-yZryFe1-xTixPO4 / C, titanium is doped to the Fe position, zirconium is doped to the Li position, 0.001 < = x < = 0.05, 0.001 < = y < = 0.02; the preparation method comprises the following steps: mixing iron phosphate, lithium carbonate, a carbon source, a titanium source and a zirconium source in a liquid-phase medium, carrying out ball milling and sand milling on the mixture to a certain slurry particle size, granulating by adopting a spray drying technology, and finally sintering the dried spray material in an atmosphere furnace. The material is applied to a lithium ion battery as a positive electrode material. The titanium and zirconium elements are doped into the carbon-coated lithium iron phosphate, so that the ion and electron transmission capability of the lithium iron phosphate is effectively enhanced, the compaction density of the material is improved, and the carbon-coated lithium iron phosphate is very suitable for being used as a high-energy and high-power-density lithium ion power battery positive electrode material.

This invention discloses a method for synthesizing nanometer anatase titanium dioxide doped by non-aquo zirconium. In this method, C1-C9 organic acid (1), tetrabutyl titanate (2) and zirconium isopropoxide (3) are used as raw materials with molar ratio of: (1):(2)=(2-20):1, After mixing the mixture is put in a reactor, heating to 80-240deg.C for reaction for 8-24hrs, and then is washed by ethanol for 3-5times, being dried under 80-160 deg.C to obtain this inventive product. This invention has advantages of: simple process, convenient operation, mild reaction condition, high yield, high crystallinaty of final product, high specific surface area and small graininess.

A capacitor and methods for manufacturing the capacitor are disclosed. The method may include forming a first electrode on a substrate, forming a dielectric layer on the first electrode, the dielectric layer having a first silicon oxide (SiO2) layer, a zirconium-doped hafnium oxide (Zr-doped HfO2) layer and a second silicon oxide layer sequentially, and forming a second electrode on the dielectric layer.

The invention discloses a lithium nickel cobalt manganese oxide high-nickel single-crystal positive electrode material and a preparation method thereof. The preparation method comprises the following steps: mixing and ball-milling nickel cobalt manganese hydroxide, a lithium source, zirconium oxide, tungsten oxide and sodium carbonate, then carrying out primary sintering, and crushing to obtain a nickel cobalt lithium manganate high-nickel single-crystal positive electrode material intermediate; wherein the primary sintering temperature is 50-150 DEG C higher than the normal sintering temperature; and uniformly mixing the nickel cobalt lithium manganate high-nickel single-crystal positive electrode material intermediate with a coating agent, and then carrying out secondary sintering to obtain the nickel cobalt lithium manganate high-nickel single-crystal positive electrode material. Tungsten oxide and sodium carbonate are introduced in the primary sintering process, the electrical conductivity of the material can be enhanced, the particle morphology can be changed, primary particles are refined, the characteristic that tungsten oxide and sodium carbonate are combined is utilized, zirconium oxide doping is combined, and at the high primary sintering temperature, the conductivity of the material is improved, and the conductivity of the material is improved. And the high-nickel single-crystal positive electrode material with high capacity, high dispersity and excellent cycle performance is obtained.

The invention discloses a preparation method of a zirconium-doped cerium fluoride-coated nickel-cobalt-manganese ternary positive electrode material, and relates to the technical field of lithium ion positive electrode materials, and the preparation method comprises the following steps: (1) ball-milling and mixing a nickel-cobalt-manganese hydroxide precursor, a lithium source and a zirconium source, and sintering to obtain the zirconium-doped nickel-cobalt-manganese ternary positive electrode material; and (2) mixing a cerium salt solution with the zirconium-doped nickel-cobalt-manganese ternary positive electrode material in the step (1), stirring, adding an ammonium fluoride solution, reacting, drying, and calcining to obtain the zirconium-doped cerium fluoride-coated nickel-cobalt-manganese ternary positive electrode material. The preparation method has the beneficial effects that the residual alkali on the surface of the prepared ternary positive electrode material is reduced, and the ternary positive electrode material has high specific discharge capacity and cycle performance and high capacity retention ratio.

The invention relates to the field of preparation of novel materials, and aims to provide a preparation method of multi-purpose tin, iron and zirconium doped silicon dioxide microspheres. The preparation method comprises the following steps: adding dibutyltin diacetate, ferric oleate, zirconium tetrachloride and tetraethylortho silicate in n-propanol, and stirring to obtain a mixture A; after uniformly mixing ricinoleic acid sodium sulfovinate, n-butanol and deionized water, adding the mixture into the mixture A, and stirring to obtain mixed liquid B; keeping adding lysine, and stirring to obtain mixed liquid C; and adding zinc chloride for demulsification, and centrifugally separating to obtain powder D, and carrying out heat treatment to obtain the multi-purpose tin, iron and zirconium doped silicon dioxide microspheres. By the powder of the invention, the shortcoming that an existing silicon dioxide high infrared emission wave band region is not superposed to an atmosphere window region is overcome, the multi-purpose tin, iron and zirconium doped silicon dioxide microspheres can be applied to a heat-insulation coating as effective infrared emission type filler, the infrared emitting ability of the multi-purpose tin, iron and zirconium doped silicon dioxide microspheres is greater than 0.94, and a new application field of a silicon dioxide powder material is opened up. The electrical property of a prepared silver-based conductive composite material is far higher than that of an existing product.

The present invention discloses a cerium-zirconium doped polishing solution as well as preparation method and application thereof. According to the preparation method, rare earth carbonate and basic zirconium carbonate are used as precursors, grain boundary energy in the raw materials is reduced through energy input while the granularity of the raw materials is greatly reduced through advanced high-energy ball milling. The spray drying ensures the moisture removal and the dispersion uniformity among powder particles; and then in combination with a specific secondary calcination mode, excessive growth of original crystals in the calcination process is prevented, so that crystal grains grow more completely, crystal lattices are more perfect, edges and corners are clearer in the calcination process, and the purity of the product is improved. Materials with small grain sizes and uniform grain size distribution can be obtained more easily, so that the polishing solution prepared by the method has high cutting output and high surface quality when being applied to polishing blue glass; besides, further ball milling and formula preparation of the polishing solution are completed simultaneously in the ball milling process, so that the ball milling efficiency is improved, the production period is shortened, and the environment-friendly effect is better.

The invention discloses a preparation method of a composite lithium titanate material, and specifically discloses a preparation method of a negative electrode material of a lithium ion battery, wherein the negative electrode material is zirconium-doped and carbon-coated lithium titanate. The doping and coating can be performed in one step through adding a modifying additive, and the preparation method is simple and can be easily applied to industrial production. The obtained composite lithium titanate material is an excellent material for producing telephone lines.

The invention relates to the technical field of thermal barrier coatings, and particularly discloses a method for preparing a zirconium oxide-doped gadolinium niobate amorphous high-temperature ceramic coating. The method comprises the steps that powder formed by mixing ZrO2, Gd2O3 and Nb2O5 is subjected to high-temperature sintering, a sintering body is obtained, and the stoichiometric ratio of zirconia doped niobic acid is x mol%ZrO2+Gd3NbO7; the sintering body is smashed into blocks of 2-3 mm; the blocks are deposited on an alloy matrix through an EB-PVD method, and the amorphous ceramic coating with the thickness of 200-300 micrometers is obtained, and according to the technological parameters, the air pressure of a cabin is not higher than 3*10-6Torr, the deposition rate is not lowerthan 10 nm / min, and the rotating rate of a sample is not lower than 45 r / min. The amorphous ceramic coating deposited on the alloy matrix has the extremely low heat conductivity, thus a very good heatinsulation effect can be achieved on the alloy matrix in a high-temperature environment, and the use environmental temperature of the alloy matrix is improved.

The invention discloses a lithium-ion battery positive electrode sheet using a cobalt-free high-nickel positive electrode material, comprising a positive electrode current collector and a positive electrode active material layer loaded on the positive electrode current collector, and the composition of the positive electrode active material layer includes a cobalt-free high-nickel positive electrode material , conductive agent and binder, the molecular formula of cobalt-free high-nickel positive electrode material is Li(Ni 1‑ x mn x )Zr y o 2 , where 0.1≤x≤0.5, 0.002≤y≤0.003. When the cobalt-free high-nickel positive electrode material is prepared, it is first prepared by coprecipitation (Ni 1‑x mn x )Zr y (OH) 2 precursor; then combine the precursor with LiOH·H 2 O mixed calcined. The present invention uses zirconium-doped cobalt-free high-nickel layered positive electrode material, which can effectively improve the cycle performance and rate performance of the positive electrode sheet; the precursor prepared by coprecipitation method has complete morphology and uniform size, and the tested Zr content and doped The impurities are basically the same, and the structural stability and high temperature stability are good.

The invention discloses a cerium-zirconium-doped polishing liquid and its preparation method and application. The preparation method uses rare earth carbonate and basic zirconium carbonate as precursors, and through pre-high-energy ball milling, the particle size of raw materials is greatly reduced while passing The energy input reduces the grain boundary energy in the raw material, and the spray drying ensures the uniformity of dispersion between the powder particles while removing the water. After that, combined with a specific secondary calcination method, it can prevent the original crystal from growing too much during the calcination process. Make the crystal grains grow more completely during the calcination process, the crystal lattice is more perfect, the edges and corners are more distinct, and it is easier to obtain materials with small grain size and uniform particle size distribution, thus ensuring that the polishing liquid prepared by the above method is used for polishing blue glass It has high cutting capacity and high surface quality at the same time; in addition, the further ball milling and formula preparation of polishing fluid are completed at the same time during the ball milling process, which not only speeds up the ball milling efficiency, shortens the production cycle, but also is more environmentally friendly.

The invention relates to a zirconium-doped mesoporous material Zr-SBA-15 as well as a preparation method and application thereof. A coordination compound generated after a complexing agent and Zr(SO4)2 are subjected to complexing is used as a zirconium source; ethyl orthosilicate is used as a silicon source; the zirconium doping is carried out on the basis of the preparation of an SBA-15 type mesoporous material; therefore, the zirconium-doped mesoporous material Zr-SBA-15 is prepared. By using the zirconium-doped mesoporous material Zr-SBA-15 as well as the preparation method and the application thereof, the problems that the Zr(SO4)2 is extremely easily hydrolyzed in an aqueous solution to generate ZrO2 to accordingly cause the prepared Zr-SBA-15 to be inhomogeneous in structure and non-uniform in zirconium distribution are solved; the prepared Zr-SBA-15 can be used as an adsorbing material for adsorbing PO4<3-> in a water body.