39results about How to "Does not cause oxidation" patented technology

The invention relates to a flowing atmosphere edge-defined film-fed crystal growth multi-chip sapphire crystal growth device and method. The device comprises a smelting furnace and an atmosphere device, the smelting furnace is placed into the atmosphere device, inert gas with an up-out and down-in flowing direction is fed into the atmosphere device, the smelting furnace comprises a tray, a heat insulation cylinder (4), an induction coil (8), a bottom heat insulation layer (13), a crucible (11), a growth mould unit (10), a seed crystal (6) and a seed rod (1), the heat insulation cylinder (4) isarranged on the tray, the induction coil (8) sleeves the heat insulation cylinder (4), the bottom heat insulation layer (13), the crucible (11), the growth mould unit (10), the seed crystal (6) and the seed rod (1) are sequentially arranged in the heat insulation cylinder (4) from bottom to top, and the seed crystal (6) is fixed to the bottom end of the seed rod (1) and arranged right above the growth mould unit (10) in a vertically movable manner through the seed rod (1). Compared with the prior art, the device has the advantages that gradient temperature distribution of a sapphire crystal growth interface area can be effectively controlled, synchronous consistency of 20 whole sapphire crystals is realized, the growth process is visible and controllable, and crystal quality is high.

The invention discloses a low oxygen content and low humidity process and apparatus for long term storage of oxidizing article and precision instrument, characterized by exhausting the air in the article storing container and filling with nitrogen of over 99% concentration, thus resulting the low oxygen content and low humidity in the storage space, preventing the metal portion of the protected article from the oxidizing corrosion.

The invention provides a magnesium alloy pumice ferric oxide cobalt composite material and a preparation method thereof. The composite material has high absorbing properties and excellent damping performance. The method of the invention has simple process and low production cost, and is suitable for industrialized production. The composite material takes magnesium alloy as a matrix; pumice ferric oxide cobalt composite material and dolomite granule are distributed on the matrix; the volume percent of the pumice ferric oxide cobalt composite material and the dolomite granule accounts for 40-45% of the composite material; the size of the composite granule is 0.5-1mm; and the magnesium alloy base body comprises the following chemical composition by weight percent: 4-8% of Al, 0.01-0.05% of Th, 0.5-1% of Si, 0.001-0.005% of Bi and the balance of Mg.

The invention discloses a powder spreading device, and relates to the technical field of additive manufacturing. The powder spreading device comprises a scraper frame, a drive motor, a flexible scraper and a coupler. The flexible scraper comprises a scraper core and a scraper sleeve; the scraper core is of a cylinder structure; the scraper sleeve is of a hollow cylinder structure; the scraper coreis sleeved with the scraper sleeve; the flexible scraper and the drive motor are installed on the scraper frame; and a rotary shaft of the drive motor is connected with one end of the flexible scraper through the coupler. The drive motor is connected with the flexible scraper. after the part of the flexible scraper is abraded, the drive motor can drive the flexible scraper to be rotated by any angle, the contact position of the flexible scraper and powder is adjusted again, the part, not abraded, of the flexible scraper makes contact with the powder, the flexible scraper can be continue to beused, the utilization rate of the scraper is improved, the drive motor controls the position of the scraper, a cabin door does not need to be opened, formed parts are not oxidized, and the printing quality is ensured.

The invention discloses a magnesium-base copper-fiber pumice iron-barium oxide composite and a preparation method thereof. The composite has a high wave-absorbing property and a high damping property. The preparation method is simple in process, in low production cost and suitable for industrial production. In the composite, magnesium alloy is used as a matrix, and pumice iron-barium oxide complex and copper alloy fibers are distributed on the matrix and account for 45 to 55 percent of the volume of the composite; the grain size of the pumice iron-barium oxide complex ranges from 0.5 to 1mm; and the magnesium alloy matrix comprises the following chemical components in percentage by weight: 3 to 6 percent of Al, 0.005 to 0.01 percent of Pb, 0.001 to 0.005 percent of Ta, 0.5 to 1 percent of Si, 0.005 to 0.01 percent of Te and the balance of Mg.

The invention relates to an active lilium extract, and a preparation method and application of the active lilium extract. The active lilium extract comprises, by mass, 22-35% of proteins, 18-32% of polysaccharide, 20-32% of amino acid and 0.005-0.01% of alkaloid. The preparation method includes a cleaning procedure, a smashing processing procedure, an ultrasonic low-temperature extracting procedure, a microwave intermediate-temperature extracting and a concentrating and drying procedure. The active lilium extract is applied to manufacturing human immunity improving and anti-cancer healthcare products and can be used as an additive of food, wine, tobacco and cosmetics. The active lilium extract, the preparation method and the application have the advantages that active ingredients are prevented from being damaged, and the active component extraction efficiency is high.

The invention provides a copper alloy based sepiolite, ferric oxide, vermiculite and barium ferric oxide composite material and a preparation method thereof. The composite material has high absorbing property and excellent damping property. The preparation method is simple in process, low in production cost and suitable for industrialized production. The composite material takes the copper alloy as the matrix and the sepiolite and ferric oxide compounds and the vermiculite and barium ferric oxide compounds are distributed on the matrix. The two kinds of compounds account for 40-50% of the composite material by volume. The copper alloy matrix comprises the following chemical components in percentage by weight: 3-5% of Al, 0.05-0.1% of Te, 0.05-0.1% of Co, 0.005-0.01% of Pr and the balance Cu.

The invention provides a zinc alloys, sepiolite-ferric oxide and vermiculite-barium ferrate composite material and a preparation method thereof. The composite material has high absorbing property and excellent damping property. The preparation method is simple in process, low in production cost and suitable for industrialized production. The composite material takes the zinc alloys as the matrices and the sepiolite-ferric oxide and vermiculite-barium ferrate compounds and titanium fibers are distributed on the matrices. The zinc alloys, the sepiolite-ferric oxide and the vermiculite-barium ferrate account for 40-50% of the composite material by volume. The titanium fibers comprise the following components in percentage by weight: 0.2-0.4% of V, 0.003-0.09% of Pr and the balance Ti. The zinc alloy matrices comprise the following chemical components in percentage by weight: 13-18% of Al, 0.05-0.1% of Te, 0.05-0.1% of Co, 0.005-0.01% of Pr and the balance Zn.

The invention provides an ashing method for photoresist patterns. The ashing method comprises the following steps: providing a substrate; sequentially forming photoresist patterns on the substrate at least twice; after forming the photoresist pattern each time, with the corresponding photoresist pattern as a corresponding mask, carrying out ion doping on the substrate, and doping doped ions with different contents into the corresponding photoresist pattern; and after ion doping, ashing the corresponding photoresist pattern with corresponding ashing gas containing hydrogen, wherein the ashing gases adopted for the photoresist patterns doped with the ions with different content are different in hydrogen content. The ashing method has the beneficial effects that the effects on the substrate can be reduced; the ashing rate on the photoresist patterns is also relatively high; and in addition, the control flexibility of photoresist pattern ashing is increased and the rate of ashing the photoresist patterns and the thoroughness degrees of ashing the photoresist patternscan be adjusted.

The invention discloses a preparation method of a consumable electrode bar for copper-chromium electric arc melting, and belongs to the technical field of metal processing. The method comprises the steps of burdening, ingot casting, powder making, blank making, degassing and hot isostatic pressing, wherein in the blank making step, spherical copper-chromium alloy powder with the particle size of 5-15 micrometers is selected to be made into a copper-chromium alloy blank bar in a cold static pressure pressing or cold spraying deposition mode, the density of the consumable electrode bar is remarkably improved by combining a hot isostatic pressing process, the density is improved to about 99% from previous 75%-85%, the arc stability of the consumable electrode bar in the smelting process is improved favorably, the gas content of the consumable electrode bar is remarkably reduced from previous 600-800 ppm to 210-400 ppm, and the voltage fluctuation in the electrode bar smelting procedure isreduced.

In order to solve the problem that an electrolyte in the existing lithium iron phosphate battery is difficult to meet the low-temperature performance requirement, the invention provides a lithium iron phosphate battery which comprises a positive electrode, a negative electrode and the electrolyte, wherein the positive electrode comprises a positive electrode active material, and the positive electrode active material is selected from lithium iron phosphate; the electrolyte comprises a solvent, a lithium salt and an additive A, the additive A comprises anions and cations shown in a structural formula 1 in the description, R1, R2, R3, R4, R5, R6, R7 and R8 are independently selected from hydrogen, cyano, nitroso, aldehyde, acyl, halogen, substituted or unsubstituted alkyl with the carbon atom number of 1-8 and substituted or unsubstituted aryl with the carbon atom number of 6-12, and the anions are acid radical ions containing phosphorus, boron or aluminum. The lithium iron phosphate battery provided by the invention has relatively low impedance and relatively good low-temperature performance.

The invention provides a titanium alloy, diatomite and barium ferric oxide composite material and a preparation method thereof. The composite material has high absorbing property and excellent damping property. The preparation method is simple in process, low in production cost and suitable for industrialized production. The composite material takes the titanium alloy as the matrix and diatomite and barium ferric oxide compounds are distributed on the matrix. The diatomite and barium ferric oxide compounds account for 45-55% of the composite material by volume. The particle size of the diatomite and barium ferric oxide compounds is 0.5-1mm. The titanium alloy matrix comprises the following chemical components in percentage by weight: 3-8% of Al, 0.001-0.005% of Ta, 0.5-1% of Si and the balance Ti. The diatomite and barium ferric oxide compounds are formed in such a manner that barium ferric oxide penetrates into the pores of the diatomite and a layer of film is formed on the wall surfaces of the pores.

The invention provides an aluminium alloys, pumice-ferric oxide and vermiculite-barium ferrate composite material and a preparation method thereof. The composite material has high absorbing property and excellent damping property. The preparation method is simple in process, low in production cost and suitable for industrialized production. The composite material takes the aluminium alloys as the matrices and the pumice-ferric oxide and vermiculite-barium ferrate compounds are distributed on the matrices. The pumice-ferric oxide and vermiculite-barium ferrate compounds account for 40-50% of the composite material by volume. The aluminium alloy matrices comprise the following chemical components in percentage by weight: 3-6% of Mg, 0.005-0.01% of Pb, 0.001-0.005% of Ta, 0.001-0.005% of Ga, 0.5-1% of Si and the balance Al.

The invention belongs to the field of chemical heat treatment, and particularly relates to ceramic slurry for aluminizing protection and a preparation method and application of the ceramic slurry. According to the ceramic slurry for aluminizing protection and the preparation method and application of the ceramic slurry, the ceramic slurry for aluminizing protection forms a stable and non-falling aluminizing protective layer after being sintered, has a good shielding effect, and does not react with a matrix. The ceramic slurry for aluminizing protection comprises the following components of zirconium oxide, a binder and metal, wherein the mass ratio of the zirconium oxide to the binder to the metal is (0.8-3): (0.5-1.5): (0.8-1.5). According to the ceramic slurry for aluminizing protection, zirconium oxide powder, the binder and metal powder are mixed and then coat a tenon of a turbine blade, and the ceramic slurry is used for protection during aluminizing of solid powder at the aluminizing temperature of 600-1,100 DEG C.

The invention discloses a contact terminal automatic welding machine which comprises a workbench, wherein a fixing block is arranged on the workbench, a material pushing air cylinder is arranged on one side of the fixing block, a material pushing rod is arranged at the output end of the material pushing air cylinder, a welding assembly is arranged above the material pushing rod, a feeding assembly is arranged at the end, away from the material pushing air cylinder, of the material pushing rod, a first clamping air cylinder and a second clamping air cylinder are arranged on the two sides of the material pushing rod correspondingly, and fixing rods are arranged at the output end of the first clamping air cylinder and the output end of the second clamping air cylinder correspondingly; and the feeding assembly comprises a first vibration feeding disc and a second vibration feeding disc, a first feeding groove is formed in the output end of the first vibration feeding disc, a first feeding mechanism is arranged at the output end of the first feeding groove, a second feeding groove is formed in the output end of the second vibration feeding disc, and a storage table, a second feeding mechanism and a feeding mechanism are arranged at the output end of the second feeding groove. According to the contact terminal automatic welding machine, small parts needing to be welded can be precisely carried to the designated positions, the carrying speed is high, the welding precision is high, and the stability is high.

The embodiment of the invention discloses a quick cooling system. The quick cooling system is applied to an intermittent carbide furnace and comprises an air blower and a cooling air duct, wherein thecooling air duct is arranged outside a Muffle vacuum tank of the intermittent carbide furnace and communicates with the air blower. In the quick cooling stage, external air is used as a cooling medium to be injected into the furnace from the bottom of the furnace through the centrifugal air blower, the cooling medium takes out heat in the furnace through the air duct and then is subjected to high-altitude exhaust through an air exhaust device, the air blower conducts continuous blowing, and quick cooling is achieved. The quick cooling system directly cools a sealed furnace body, the cooling medium does not make contact with a product, product oxidization is avoided, and the quality stability of the product is ensured. In addition, air serves as the cooling medium, so that the cost is reduced; and the structure is simple, operation is convenient, and the safety is good. The embodiment of the invention further discloses the intermittent carbide furnace.