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447 results about "Titanium zirconium" patented technology

In its elemental form, zirconium has a silvery white appearance that is similar to titanium. Zirconium's principal mineral is zircon (zirconium silicate ). Zirconium is commercially produced as a byproduct of titanium and tin mining and has many applications as a opacifier and a refractory material.

High-nickel positive active material of surface-modified lithium ion battery and preparation method of positive active material

The invention discloses a high-nickel positive active material of a surface-modified lithium ion battery. A matrix substance is the high-nickel positive active material LiNixCoyMzO2, the surface of the matrix substance is uniformly coated by a lithium-ion conductor compound which comprises at least one of LiAlO2, Li4Ti5O2 and Li2ZrO3; the content of the total impurity lithium in the positive active material is below 0.085%. The invention also discloses a preparation method of the positive active material. The preparation method comprises the following steps of: firstly mixing the matrix substance with an organic solution containing aluminum, an organic solution containing titanium or an organic suspension liquid containing aluminum/titanium/zirconium, drying, calcining the dried mixture, finally generating the lithium-ion conductor compound on the surface of the matrix substance, namely the high-nickel positive active material of the surface-modified lithium ion battery. The high-nickel positive active material disclosed by the invention has the advantages that the content of alkali substances is obviously reduced, the processing performance of the material is improved, and the electrochemical stability is improved.
Owner:HUNAN CHANGYUAN LICO CO LTD

Steel for steam-temperature ultra-supercritical thermal power unit and preparation method thereof

ActiveCN103045962ACeriumCobalt
The invention relates to steel for a steam-temperature ultra-supercritical thermal power unit and a preparation method thereof, belonging to the technical field of heat resistant steel. The steel comprises the following chemical compositions by weight percentage: 0.06-0.10 percent of carbon, 0.1-0.5 percent of silicon, 0.2-0.8 percent of manganese, not more than 0.004 percent of phosphorous, not more than 0.002 percent of sulfur, 8.0-9.5 percent of chromium, 2.5-3.5 percent of tungsten, 2.5-3.5 percent of cobalt, 0.03-0.07 percent of niobium, 0.10-0.30 percent of vanadium, 0.80-1.20 percent of copper, 0.006-0.010 percent of nitrogen, 0.010-0.016 percent of boron, 0.01-0.04 percent of rare-earth cerium, not more than 0.01 percent of nickel, not more than 0.005 percent of aluminum, not more than 0.01 percent of titanium, not more than 0.01 percent of zirconium and the balance of ferrum and inevitable impurity elements. The steel has the advantages that the steel can be used for preparing G115 steel of 650 DEG C of steam-parameter ultra-supercritical thermal power unit and a large-diameter boiler tube thereof, and the room-temperature mechanical property, the impact property, the high-temperature mechanical property and the permanence property of the steel are much higher than those of P92 steel in the Gb5310 and ASME standard.
Owner:CENT IRON & STEEL RES INST

Preparation method of titanium zirconium base alloy

InactiveCN103602840AHigh strengthElongation at failure retentionElectric arc furnaceTitanium zirconium
The invention relates to a preparation method of a titanium zirconium base alloy. The titanium zirconium base alloy comprises the following components in percentage by weight: 41-62% of Ti, 30-51% of Zr, 5% of Al and 3% of V. The preparation method comprises the following steps: adding the raw materials into a nonconsumable electric-arc furnace and melting the raw materials to obtain an alloy ingot; after coating a high-temperature antioxidant on the surface of the alloy ingot, heating and insulating in the furnace, and cogging and forging to obtain a platy alloy; after removing the antioxidant on the surface, heating in a thermal treatment furnace at 850-870 DEG C, insulating for 1 hour and performing water quenching and cooling; cutting the alloy plate to thin plates which are 3-4mm long for rolling and forming at room temperature, wherein the rolling strain rate is 2.2-3.1<-s> and the total deformation is over 80%; then, annealing, wherein the vacuum degree is 10<-4>-10<-5>Pa, the temperature is 740-760 DEG C; insulating for 1 hour; performing air cooling to room temperature. According to the preparation method provided by the invention, the titanium zirconium base alloy with the microstructure which is a special duplex microstructure is obtained, and the alloy strength is effectively improved while the plasticity of the alloy is maintained.
Owner:YANSHAN UNIV

Method for manufacturing polycrystalline silicon, and polycrystalline silicon for solar cells manufactured by the method

Provided is a method for the preparation of polycrystalline silicon in which, in conducting preparation of polycrystalline silicon by the Siemens method or by the monosilane method, no outer heating means is necessitated for the core member (seed rod), onto which polycrystalline silicon is deposited, from the initial stage of heating, the deposition rate is high and the core member seed rod can be used repeatedly.The method for deposition of high-purity polycrystalline silicon, at a high temperature, onto a white-heated seed rod in a closed reaction furnace by pyrolysis or hydrogen reduction of a starting silane gas supplied thereto, is characterized in that the seed rod is a member made from an alloy having a recrystallization temperature of 1200° C. or higher. It is preferable that the alloy member is of an alloy of Re—W, W—Ta, Zr—Nb, titanium-zirconium, or a carbon-added molybdenum (TZM) in the form of a wire member having a diameter of at least 0.5 mm, a plate member having a thickness of at least 1 mm or a prismatic member, or a tubular member having a diameter of at least 1 mm, wall thickness of at least 0.2 mm with an inner diameter not exceeding 5 mm, that the plate member, wire member, prismatic member or tubular member has a tapered form and further that the tubular member is a tapered duplex tube.
Owner:SHIN ETSU FILM +1

Method for preparing fine-grain high-density TZM (Titanium-Zirconium-Molybdenum Allo) alloy

The invention discloses a method for preparing a fine-grain high-density TZM (Titanium-Zirconium-Molybdenum Allo) alloy. The method disclosed by the invention comprises the following steps of: with pure molybdenum powder, ZrH2 powder, La2O3 powder and graphite powder as raw materials, mixing the raw materials, and carrying out ball milling, press molding, presintering and high-temperature sintering to obtain the TZM alloy. The TZM alloy prepared by using the method disclosed by the invention has the characteristics of fine crystal grains, distribution uniformity, low porosity, high compactness, simple preparation process and strong operability and controllability and has the most remarkable advantages that: on the basis of the traditional ZTM alloy preparation method, rare earth oxide La2O3 is solid-solid doped in the alloy powders, a mode of combining mixing and ball-milling of the alloy powders and a mode of sectional sintering during high-temperature sintering are adopted, crystal grains are fined, the alloy density is remarkably improved, the sintering temperature of the TZM alloy is reduced to 1800-2000 DEG C from 2100-2300 DEG C in the traditional method, therefore energy resources are saved and requirements of an enterprise on the fine-grain TZM alloy material with high density can be met.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Preparing method and application of high purity and density spherical titanium zirconium alloy powder

The invention relates to a preparing method and application of high purity and density spherical titanium zirconium alloy powder, and belongs to the technical field of alloy powder material preparation. The preparing method comprises the following steps that titanium sponge and zirconium sponge are used as raw materials, and titanium zirconium alloy ingots are prepared by using a vacuum induction melting technology; uniform vacuum annealing treatment is conducted on the titanium zirconium alloy ingots, and the ingots of uniform elements are obtained; the titanium zirconium alloy ingots are crushed into particles, hydrotreating is conducted, and hydrogen absorption titanium zirconium alloy powder is obtained; the hydrogen absorption titanium zirconium alloy powder is ball-milled under atmosphere protecting, and the hydrogen absorption titanium zirconium alloy powder of small particle sizes and irregular forms is obtained; the hydrogen absorption titanium zirconium alloy powder of irregular forms are sent to an inductive plasma torch, and the hydrogen absorption titanium zirconium alloy powder quickly absorbs heat, is dissolved and dehydrogenized; and in the dehydrogenizing process, the hydrogen absorption titanium zirconium alloy powder is split and shattered and then fused and nodulized under the high temperature, and finally, the high purity and density spherical titanium zirconium alloy powder is obtained by cooling. The titanium zirconium alloy powder prepared through the method has the advantages of being high in purity, small in particle size, good in uniformity, high in degree of sphericity and good in flowability.
Owner:云航时代(重庆)科技有限公司

Sand casting technology for titanium, zirconium and nickel and alloy casting thereof

The invention discloses a sand casting technology for titanium, zirconium and nickel and an alloy casting of the titanium, zirconium and nickel. The sand casting technology comprises steps of: (1) preparation of casting sand: adding bauxite powder, bauxite sand and silicate powder to a sand mixer, agitating for 3 to 4 hours, then adding silica sol, and finally adding dextrin, so as to obtain the casting sand; (2) modeling: manufacturing a die according to the casting technology drawing; (3) drying to obtain a casting mold: transferring the sand casting which is naturally and completely dried in the step (2) into an oven or a resistance furnace for roasting, so as to form the casting mold; (4) preparation of fire-resistant paint; (5) preparation of a fire-resistant coating: spraying the agitated paint on the surface of the casting mold which is contacted with the molten liquid during pouring; (6) roasting at a high temperature: transferring the casting mold which is naturally and dried in the step (5) into the resistance furnace for roasting; and (7) smelting and pouring: smelting and pouring in a vacuum kish self-consuming furnace for smelting and pouring. By adopting the sand casting technology, various castings of different dimensions can be produced in a large scale; the surfaces of the castings are free of defects such as cold shuts, current ripples and cracks; and the insides of the castings are free of the defects such as shrinkage cavities and inclusions.
Owner:XIAN PUMP & VALVE GENERAL FACTORY CO LTD
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