72 results about "Yttrium compound" patented technology

The present invention provides an alkaline battery having good heavy-loading discharge characteristics even after long-term storage at high temperatures. The alkaline battery of the present invention comprises a positive electrode containing manganese dioxide and nickel oxyhydroxide as an active material, a negative electrode containing zinc as an active material, and an alkaline electrolyte. The positive electrode further contains at least one compound selected from the group consisting of an oxygen-containing zinc compound, an oxygen-containing calcium compound, an oxygen-containing yttrium compound, and an oxygen-containing titanium compound.

This invention relates to a process of preparing a catalyst from zeolite and peptized alumina. The invention comprises adding a yttrium compound to the zeolite, either prior to, during, or after its combination with the peptized alumina. The yttrium compound can be added to the zeolite via exchange of yttrium onto the zeolite prior to addition of peptized alumina, or the yttrium can be added as a soluble salt during the combination of the zeolite and peptized alumina. In either embodiment, the zeolite catalyst is then formed from the zeolite, yttrium and peptized alumina, optionally containing other inorganic oxide. This invention is suitable for preparing fluid cracking catalysts.

This invention discloses one rare earth thick film circuit resistance plasma and its process method based on metal baseboard, wherein, the plasma is composed of function phase and organic load with proportion as 65-85:35- 15; the function phase is composed of palladium-silver-yttrium compound power and micro crystal power with proportion as 75-55:25- 45; palladium-silver-yttrium weight as proportion as 75-59:15-40.5:10-0.5. The rare earth resistance plasma process comprises the following steps: a, micro crystal glass powder processing; b, palladium-silver-yttrium compound processing; c, matching organic solvent load; d, processing rare earth plasma.

A member for a plasma etching device, which comprises a device substrate comprising quartz glass, aluminum, alumite or a combination thereof and, formed on the surface thereof, a coating film of yttrium oxide or YAG having a film thickness of 10 μm or more and a variation in the thickness of 10% or less, and preferably a surface roughness (Ra) of 1 μm or less; and a method for manufacturing the member for a plasma etching device, which comprises a step of plasma-spraying yttrium oxide or YAG to the surface of said device substrate or a step of fusing yttrium oxide or YAG with an oxyhydrogen flame, followed by coating the surface with the fused product, or a step of applying a solution containing yttrium, a yttrium compound or YAG on the above surface, followed by heating to fuse the resultant coating, or a combination of the above steps, thereby forming a coating film of yttrium oxide or YAG having a film thickness 10 μm or more and a variation in the thickness of 10% or less, and preferably a surface roughness (Ra) of 1 μm or less. The member for a plasma etching device is capable of retaining high plasma resistance for a long period of time, is free from the occurrence of the abnormal etching owing to partial change of electric characteristics, and thus can be used for a long time, in particular, even in the treatment of a large semiconductor device of a 12 inch silicon wafer.

The invention discloses fluorescent powder capable of promoting plant growth and a preparation method thereof. The fluorescent powder is prepared from Ce-doped oxide powder and Al2O3:Cr3+ powder whichare mixed, wherein the Ce-doped oxide powder has a garnet structure. The preparation method comprises the steps: a first aluminum compound and a chromium compound are weighed, and mixed and ground tothe micron grade, and first powder is obtained; the first powder is calcined at the high temperature, cooled and ground, and the Al2O3:Cr3+ powder is obtained; a second aluminum compound, a yttrium compound and a cerium compound are weighed, mixed, ground, calcined at the high temperature under the reducing atmosphere, cooled and ground, and YAG:Ce3+ powder is obtained; and the YAG:Ce3+ powder and the Al2O3:Cr3+ powder are mixed according to the mass ratio of 1:(1 to 20), and ground, and the fluorescent powder capable of promoting plant growth is prepared. The fluorescent powder can emit redlight beneficial to plant growth, the utilization rate of light energy can be increased, plant growth can be promoted, the cost is low, the efficiency is high, and electric energy is not consumed.

The invention proposes a composition comprising:

• • a) a hydrogen-fixing alloy of formula R_1-tMg_tNi_s-zM_z in which: R represents one or more elements chosen from the group comprising La, Ce, Nd and Pr; M represents one or more elements chosen from the group comprising Mn, Fe, Al, Co, Cu, Zr and Sn;
  • 0.1≦t≦0.4;
  • 3.0≦s≦4.3;
  • z≦0.5;
  • b) a manganese compound in a proportion such that the mass of manganese represents from 1 to 5.5% of the mass of the alloy,
  • c) an yttrium compound in a proportion such that the mass of yttrium represents from 0.1% to 2% of the mass of the alloy. The invention also relates to an anode comprising the composition according to the invention. The invention also relates to an alkaline electrolyte battery comprising said at least one anode.

The invention provides a titanium-based composite material and a manufacturing method thereof. The titanium-based composite material is selected from alpha-phase pure titanium or titanium alloy parent metal, alpha-phase and beta-phase pure titanium or titanium alloy parent metal, beta-phase pure titanium or titanium alloy parent metal and Omega-phase mesoporous metal titanium parent metal; at least one ceramic powder enhanced composite material, which contains 10% of the components, of carbide, nitride, oxide or boride is added; or at least one ceramic powder enhanced composite material or one powder enhanced composite material composed of ferroelectric powder, which contains 10% of the components, of titanate, niobide, a barium compound, a strontium compound, a tantalum compound and a yttrium compound is added; or at least one magnetic powder enhanced composite material, which contains 10% of the components, of a neodymium-iron-boron compound or a samarium-cobalt compound is added; and the powder enhanced composite material and the titanium parent metal are mixed according to the total volume ratio of 10% to 70% and a mixture is processed in a casting, sintering or pressurizing manner to prepare the titanium-based composite material which has physical or chemical and electrical properties of the parent metal and the composite material.

The invention provides a preparation method of an yttrium-containing lithium ion battery cathode material lithium titanate carbon-coated composite material. The preparation method is characterized in that the preparation method comprises following concrete steps: (1) weighing a soluble lithium compound, titanium dioxide (anatase type) and a yttrium compound according to a stoichiometric ratio of an target compound of Li[x]YpTi[y]Oz, adding into a ball milling jar, adding an organic micromolecule carbon source precursor and mixing, and performing ball milling in an uniform medium and drying, wherein the x is more than 0 and not more than 8, the p is more than 0 and less than 5, the y is more than 0 and not more than 6, the z is not less than 1 and not more than 12, and the ratio of x to y is not less than 1/2 and not more than 2; (2) maintaining the temperature of the dried powder in air or an inert gas at 300-600 DEG C for 2-20 h to obtain a sintering precursor; and (3) mixing the sintering precursor obtained in the step (2) and an organic macromolecule carbon source precursor, performing ball milling in an uniform medium and drying; and maintaining the temperature in air or the inert gas at 600-900 DEG C for 2-30 h to obtain a finished product of lithium titanate powder. The material shows excellent rate performance. The preparation method significantly improves the conductivity of the lithium titanate product, and the material shows the excellent rate performance and excellent cycle performance, and is suitable to be used in a power cell.

The embodiment of the invention discloses a method for preparing YAG-Ce fluorescent powder for a white-light LED (light-emitting diode). The method comprises the following steps of: weighing a combustion agent and raw materials comprising an aluminium compound, a yttrium compound and a cerium compound for preparing the YAG-Ce fluorescent powder; uniformly mixing and grinding the materials aforementioned, then starting to heat to 300-600 DEG C until a combustion phenomenon occurs, then heating, insulating and reacting for a period of time, then cooling to a room temperature to obtain yellow powder; and ball-milling and sieving the yellow powder to obtain the YAG-Ce fluorescent powder. According to the method disclosed by the embodiment of the invention, an organic matter is used as the combustion agent, and the YAG-Ce fluorescent powder used in a white-light LED device is manufactured by a combustion method; and because the combustion heat generated by a combustion reaction can be very high, the problems of high needed temperature, energy consumption, no environment friendliness and the like of the traditional high-temperature solid-state method can be effectively solved; a reaction temperature can be greatly reduced to about 1000 DEG C in the method disclosed by the invention from the traditional 1400-1700 DEG C, so as to achieve an effect of low-temperature synthesis, and the manufactured YAG-Ce fluorescent powder is excellent in appearance and light-emitting property; and because the temperature of a synthetic reaction is greatly reduced, the cost of energy is greatly reduced, and the total manufacturing cost is obviously reduced.

A method for depositing a high-k dielectric material on a semiconductor substrate is disclosed. The method includes applying a chemical bath to a surface of a substrate, rinsing the surface, applying a co-reactant bath to the surface of the substrate, and rinsing the surface. The chemical bath includes a metal precursor which includes at least a hafnium compound, an aluminium compound, a titanium compound, zirconium compound, a scandium compound, a yttrium compound or a lanthanide compound.

According to one embodiment, a member for a semiconductor manufacturing device includes an alumite base material including a concavity, and a first layer formed on the alumite base material and including an yttrium compound. The first layer includes a first region, and a second region provided in the concavity and located between the first region and the alumite base material. An average particle diameter in the first region is shorter than an average particle diameter in the second region.

The invention discloses Nd-sensitized yttrium oxide-based laser ceramic. Each crystal particle of the laser ceramic is provided with a core-shell structure, a core layer is a (Y,Nd,M)2O3 phase, a shell layer is a (Y,N)2O3 phase, wherein M is rare earth luminescent ions, and N is a sintering aid. A preparation process comprises the following steps: firstly mixing a yttrium compound, a neodymium compound and an M compound, calcining to obtain (Y,Nd,M)2O3 powder, then mixing the yttrium compound with the N compound, calcining to obtain (Y, N)2O3 powder, and then mixing the two powders; or mixing the yttrium compound with the N compound, then directly adding the (Y,Nd,M)2O3 powder, mixing and calcining; carrying out isostatic pressing on the obtained mixed powder, carrying out vacuum sintering, cooling, and then annealing. The laser ceramic disclosed by the invention has the advantages that a (Y,N)2O3 thin layer with excellent sintering property is utilized for coating the (Y,Nd,M)2O3 phase, and the lattice distortion is reduced on the basis of improving the sintering property of the ceramic, so that excellent laser performance is obtained.

This invention relates to a process of preparing a catalyst from zeolite having a relatively high content of sodium of 18.6 μg Na₂O per zeolite surface area, or greater. The invention comprises adding yttrium compound to the zeolite, either prior to, during, or after its combination with precursors for catalyst matrix. This invention is suitable for preparing zeolite containing fluid cracking catalysts.

The invention discloses yttrium oxide-based powder with high sintering activity. The yttrium oxide-based powder has a core-shell structure, a core layer of the core-shell structure is a Y2O3 phase, and a shell layer of the core-shell structure is a (Y, La, Zr)2O3 phase; a preparation process of the yttrium oxide-based powder comprises the following steps: firstly, dissolving a yttrium compound into deionized water, then putting into a closed container, and heating up to 150-250 DEG C to obtain the core layer Y2O3 phase; cooling to room temperature, then adding compounds of Y, La and Zr, stirring for dissolving the compounds, and evenly mixing; after that, dropwise adding ammonia water while stirring so as to obtain a precipitate of the (Y, La, Zr)2O3-coated core layer Y2O3 phase; filtering the precipitate, then carrying out ball mill mixing, and drying; calcining an obtained product at the temperature of 900-1300 DEG C to obtain the yttrium oxide-based powder. The raw materials of the yttrium oxide-based powder are wide in source and easy to obtain, and the preparation technology of the yttrium oxide-based powder is simple and controllable; the Y2O3 phase is coated with the (Y, La, Zr)2O3 phase with excellent sintering performance, so that the yttrium oxide-based powder has the excellent sintering activity.

The invention discloses yttrium-doped calcium phosphate bone cement and a preparation method thereof. The preparation method comprises the steps that yttrium-doped tetracalcium phosphate powder which has certain granularity distribution and is prepared by a certain molar ratio and calcium hydrophosphate powder are mixed evenly, a certain amount of distiller liquid is added, and the ratio of solid phases to liquid phases is 2-6 g/mL. A bone cement curing product is the yttrium-doped hydroxyapatite and residual yttrium-doped tetracalcium phosphate under the physiological environment. A yttrium compound is successfully applied to the calcium phosphate bone cement, the mechanical property of the calcium phosphate bone cement is remarkably improved on the basis of not reducing the porosity, the curing performance of the calcium phosphate bone cement is reserved, the curing product has better biological activity, and the calcium phosphate bone cement has broader clinical application prospects compared with traditional calcium phosphate bone cement.