20 results about "Yttrium" patented technology

Embodiments of a cover ring for use in a plasma processing chamber are provided. In one embodiment, a cover ring for use in a plasma processing chamber includes a ring-shaped body fabricated from a yttrium (Y) containing material. The body includes a bottom surface having an inner locating ring and an outer locating ring. The inner locating ring extends further from the body than the outer locating ring. The body includes an inner diameter wall having a main wall and a secondary wall separated by a substantially horizontal land. The body also includes a top surface having an outer sloped top surface meeting an inner sloped surface at an apex. The inner sloped surface defines an angle with a line perpendicular to a centerline of the body less than about 70 degrees.

The invention relates to the field of magnesium-lithium alloys, in particular to a dual-phase Mg-Li-Zn-Y magnesium-lithium alloy enhanced by effectively utilizing a rare earth element Y and a preparation method. The problem that the absolute strength of the magnesium-lithium alloy is low is solved. Under the premise that the Y content is certain, the ratio (Zn/Y = 5-10) of zinc to yttrium in the alloy is reasonably selected, so that volume fraction of a quasicrystalline phase brought into a magnesium-lithium alloy base body reaches the maximum, and the dual-phase Mg-Li-Zn-Y alloy with the ultra-low density, high strength and good plasticity is prepared. The components of the magnesium alloy material comprise 5-20% of Li, 3-20% of Zn, 0.5-5% of Y and the balance Mg, and all the percentagesare percentages by weight. The dual-phase Mg-Li-Zn-Y magnesium-lithium alloy is made into a product through alloy smelting and subsequent hot extrusion and machining deformation, and the machining technology of the dual-phase Mg-Li-Zn-Y magnesium-lithium alloy is easy and convenient to operate. According to the dual-phase Mg-Li-Zn-Y magnesium-lithium alloy enhanced by effectively utilizing the rare earth element Y and the preparation method, the tensile strength of the material is sigma b=200-350 MPa, the yield strength is sigma 0.2=140-220 MPa, the ductility is delta=10-40%, and the density is 1.58-1.85 g/cm<3>.

A process for preparing an amine by reacting a primary or secondary alcohol, aldehyde and/or ketone with hydrogen and a nitrogen compound selected from the group of ammonia and primary and secondary amines, in the presence of a supported copper-, nickel- and cobalt-containing catalyst, wherein the catalytically active material of the catalyst, before the reduction thereof with hydrogen, comprises oxygen compounds of aluminum, of copper, of nickel, of cobalt and of tin, and in the range from 0.2 to 5.0% by weight of oxygen compounds of yttrium, of lanthanum, of cerium and/or of hafnium, each calculated as Y₂O₃, La₂O₃, Ce₂O₃ and Hf₂O₃ respectively, and catalysts as defined above.

The invention relates to a nickel-chromium-molybdenum-niobium corrosion resistant welded alloy, which is composed of the following components in percentage by weight: 21 to 23% of Cr, 8.5 to 10% of Mo, 3.2 to 4.0% of Nb, 0.1 to 0.3% of Ti, 0.1 to 0.3% of Al, 0.04 to 0.06% of Y, and the balance being Ni. A certain amount of titanium and aluminum is added so as to strengthen the deoxidation effect of the alloy steel and reduce the gas content (H, O, and N) of the alloy steel. Metal yttrium is added to improve the rolling plasticity of the alloy steel, moreover the post processing and forging of alloy steel become easier, and the mechanical performance of the deposited metal, which is generated during the welding process, is improved. The added niobium and molybdenum both strengthen the alloy. The alloy has an excellent pitting corrosion and gap corrosion resistant performance, an excellent high-temperature and ultralow-temperature mechanical performance, and good anti-corrosion performance under severe environment. The alloy is widely used in industries such as chemical engineering, aviation, marine engineering, pollution control box of nuclear reaction equipment, and the like, is mainly used for welding of abnormal shaped steel and nickel based alloy, and can be also used for steel and surface built-up welding.

The invention discloses a preparation method of a fluorination catalyst. The preparation method is as follows: preparing a solution of active component metal salts, wherein preferably the atomic ratio of Co/Cr is 0.05-0.25 and the atomic ratio of Y/Cr is preferably 0.01-0.15; reacting with ammonia water as a precipitant at a PH value between 7 and 9; further stirring and aging for 9-11 minutes; filtering, and washing with deionized water till the solution is neutral; drying a filter cake at a temperature of 100-150 DEG C; carrying out calcination in an inertial gas environment to obtain a catalyst precursor; crushing the catalyst precursor and mixing the catalyst with graphite; laminating the uniformly mixed powder till the lamina cannot be crushed with hands; at the temperature of 200-400 DEG C, introducing inertial gas and hydrogen fluoride mixed gas, and carrying out fluorination to obtain the catalyst, wherein metal cobalt and yttrium form corresponding metal oxide during calcination stage; small metal oxide particles move in the catalyst precursor and the catalyst precursor is etched by the particles, the etching of the residual moisture in the catalyst precursor to the catalyst precursor can also be catalyzed, so as to form a series of porous structures in which medium pores take a great proportion.

The invention discloses a novel powder metallurgical gear. The novel powder metallurgical gear is prepared from iron powder, copper powder, molybdenum powder, vanadium powder, nickel powder, yttrium powder, aluminum powder, magnesium powder, cobalt powder, lead powder, steel slag powder, cupola slag powder, ferroalloy slag powder, modified tree ash powder, graphite powder, epoxidized butyl stearate, silicone oil, methylcellulose, aluminum stearate, polyethylene glycol, ethylene bisstearamide, stearic acid, carbon fibers, glass fibers, boron nitride, epoxy propoxy propyl trimethoxysilane, silica, manganese sulfide, acrylate, an inhibitor, a binder, an enhancer, a cutting agent, a lubricant, a coupling agent and a dispersion agent. According to the novel powder metallurgical gear, through the specific composition proportion, the novel powder metallurgical gear is even in overall density, high in density, high in ductility and area percentage reduction, good in wear resistance, strength and hardness, high in material utilization rate and suitable for quickly producing high-performance gears on a large scale.

The invention relates to a method for manufacturing a thermal barrier comprising a ceramic coating layer and covering at least one portion of the surface of a substrate, in which the ceramic coating layer is deposited on the substrate solely by a cathodic electrodeposition process between at least one cathode (26) and an anode (28), the substrate being formed from an electronically conducting material and constituting the cathode. Characteristically, the electrolyte (24) comprises at least one salt chosen from the group comprising lanthanide, yttrium, zirconium, and hafnium salts, so that, through the electrodeposition process, the coating layer comprises at least one oxide chosen from the group comprising lanthanide, yttrium, zirconium, and hafnium oxides. The method further includes a step of heat-treating the ceramic coating layer between 400 DEG C and 2000 DEG C for at least 10 minutes.

The invention discloses an anti-corrosion iron-based powder metallurgy self-lubricating CNG engine valve seat ring. The anti-corrosion iron-based powder metallurgy self-lubricating CNG engine valve seat ring is made from, by weight, 6.1-6.4 parts of chromium, 4.1-4.3 parts of cobalt, 0.9-1.1 parts of nickel, 2.1-2.4 parts of manganese, 3.1-3.4 parts of magnesium, 0.4-0.6 part of yttrium, 16-17 parts of copper, 1.1-1.2 parts of nano-molybdenum disulfide, 0.8-1.1 parts of graphite fluoride, 0.5-0.7 part of metallurgical carbon black, 2-3 parts of aluminum oxide, 0.1-0.2 part of sodium iodide, 1.7-2.1 parts of resol phenolic resin, 0.6-0.8 part of aluminum silicate fibers, 1-2 parts of paraffin and 65-67 parts of iron. According to the valve seat ring, the surface of modified nano-molybdenum disulfide is covered with a layer of copper film to be added into a substrate material by serving as a solid lubricating agent, the components such as aluminum oxide, manganese, magnesium and yttrium are also added, the metal particle phase is changed through the processes of sintering, infiltration and heat treatment, and the made product has the excellent corrosion resistance.

Fire ion detector (ZVD) is made of natural quartz, rare earth, yttrium, iridium, ruthenium, calcium, zirconium, iridium, titanium, nickel, palladium, platinum, manganese, etc. detectors of different specifications. A is the tube wall, A1, A2, G is the electrode coating, A3 is the electronic chamber particle and electronic area; B is the temperature sensor; C is the quartz body; D is the air duct; E is the insulation layer; F is the heating resistance layer ; G electron oscillation area; G1 jet port electron emission area; LI, L2 are heating power supply terminals; M is constant temperature electronic block; H1, H3 are signal output terminals; H2 polarized pole; J is air inlet; Composition, stable work and high precision. It can detect trace amounts of hydrogen and organic gases, etc., and the detection limit can be as low as 0.1ppb. It is suitable for the analysis of environmental protection, gas, chemical, nuclear energy and other industries. The detector does not need combustion gas and combustion-supporting gas, and the carrier gas can be nitrogen or inert gas.

The invention relates to a high-purity nano aluminium oxide biological ceramic formed through starch curing and a preparation method and application thereof. The preparation method includes the steps that (a) nano aluminium oxide, nano magnesium oxide, nano zirconia and yttrium oxide are mixed, dried and grinded to prepare a mixture for standby application according to the weight ratio of 95.60 to 2.13 to 2.06 to 0.21; (b) distilled water, polyvinyl alcohol 0.05 wt%, ammonium citrate 1.5 wt% and corn starch 0.25-1.25 wt% are adopted to prepare mixed slurry; (c) the slurry is mixed with the mixed material under the conditions of cold bathing and stirring, and ultrasonic treatment and defoaming are performed; (d) the mixed slurry is poured into a hole-free mold for forming; (e) green body pretreatment is performed; (f) a green body is heated to reach 1250 DEG C at the heating rate of 3-5 DEG C, heat preservation is performed for 2 hours, then heating is performed to reach 1600 DEG C at the heating rate of 2-3 DEG C, and naturally cooling is performed. The prepared high-purity nano aluminium oxide biological ceramic can be used for manufacturing high-performance gastric devices, and meanwhile the preparation method meets the requirements for complicated shapes and fine sizes of biological ceramics and is a biological ceramic forming technology having application prospect.

The invention discloses a stainless steel material with a shape memory function and a preparation method thereof. The stainless steel material comprises, by mass, 0.09-0.12% of carbon, 4.36-5.23% of nickel, 3.86-5.20% of chromium, 12.46-13.33% of manganese, 2.51-3.01% of silicon, 1.47-1.89% of niobium, 4.23-4.87% of titanium, 0.20-0.40% of yttrium, not more than 0.035% of the total amount of phosphorus and sulphur, and the balance iron and inevitable impurities. According to the stainless steel material with the shape memory function and the preparation method thereof, the problems that a stainless steel traction frame of a traditional skull retractor is too high in yield strength and low in bending property and recovery rate are mainly solved, by using and improving existing Fe-Mn-Si memory alloy, the low-cost stainless steel material with the shape memory function is obtained, the yield strength of the stainless steel material is not higher than 375 N/mm<2>, the toughness of the stainless steel material reaches 8.5 J/cm<2>, the shape recovery rate of the stainless steel material reaches 97.4%, and existing defects are overcome.

The invention provides a conductive copper water jacket which is used on a metallurgical furnace or a high temperature furnace. The conductive copper water jacket comprises a copper base body, a cooling water channel, a water inlet pipe and a water outlet pipe, wherein the cooling water channel is arranged inside the copper base body; the water inlet pipe and the water outlet pipe are communicated with the cooling water channel; and the cooling water channel, the water inlet pipe, the water outlet pipe and the copper base body are of an integrated overall structure. The procedure of welding the water inlet pipe, the water outlet pipe, the cooling water channel and the copper base body is avoided; the problem of welding leakage is prevented; the cooling water channel is shaped at a time; the cooling water is directly contacted with the copper base body; the cooling effect is improved; the service life of the water jacket is prolonged; as the copper base body is doped with phosphorus, magnesium, arsenic and yttrium, the density of the copper base body is increased effectively, the copper crystallization is finned, and the electric conductivity and the heat-conducting property of the copper are increased.

The invention relates to a filter material used for sewage treatment and particularly relates to a high-efficient composite filter material prepared by blending melt-blown polypropylene with modified pseudo-boehmite and used for sewage treatment and a preparation method thereof. The filter material is prepared from following raw materials, by weight: 1-2 parts of manganese sand in 200-300 meshes, 15-18 parts of micro powder of pseudo-boehmite in 200-300 meshes, 30-35 parts of polypropylene, 1-2 parts of a titanate coupling agent, 0.4-0.5 parts of sodium lignin sulfonate, 1-2 parts of polyether-modified silicone oil, 8-10 parts of nano bamboo charcoal powder, 1-2 parts of yttrium sol being 8-10% in solid content, 0.01-0.02 parts of lanthanum-series rare earth salt and 30-40 parts of water. In the invention, the modified pseudo-boehmite-based composite micro powder is supported onto the modified polypropylene master batch melt-blown filaments to prepare the filter material having a stereoscopic network structure. The filter material is excellent in purification effect, is stable and high-efficient in performances, is changeable in shape, is not liable to damage and can be used repeatedly.

The invention discloses a steel material with the surface containing rare earth yttrium element, which is characterized in that plasma diffusion metalizing technology is used for the surface of medium and low carbon steel; rare earth yttrium element is permeated, and an alloy layer with the surface thickness of more than or equal to 50mu m can be obtained; and the steel material has the average yttrium content of 3-35% at the position 10-15mu m away from the surface. In a vacuum state, the rare earth yttrium element is permeated into the surface of the medium and low carbon steel by plasma surface metallurgical technology; and furthermore, the using quantity of the rare earth element is low, the adding technique is simple, the product cost is low, the steel material with the surface containing the rare earth yttrium element has the oxidation resistance and corrosion resistance which reach the performances of whole metallurgical rare earth steel, and the service life is long.