175results about How to "Reduce volume fraction" patented technology

The formation of a gap-filling silicon oxide layer with reduced volume fraction of voids is described. The deposition involves the formation of an oxygen-rich less-flowable liner layer before an oxygen-poor more-flowable gapfill layer. However, the liner layer is deposited within the same chamber as the gapfill layer. The liner layer and the gapfill layer may both be formed by combining a radical component with an unexcited silicon-containing precursor (i.e. not directly excited by application of plasma power). The liner layer has more oxygen content than the gapfill layer and deposits more conformally. The deposition rate of the gapfill layer may be increased by the presence of the liner layer. The gapfill layer may contain silicon, oxygen and nitrogen and be converted at elevated temperature to contain more oxygen and less nitrogen. The presence of the gapfill liner provides a source of oxygen underneath the gapfill layer to augment the gas phase oxygen introduced during the conversion.

The invention discloses light and pressure-proof fast-decomposed cast magnesium alloy which can be used as a tripping ball material for a multi-stage sliding sleeve staged-fracturing technique. The light and pressure-proof fast-decomposed cast magnesium alloy is prepared from the following components: 13-25% of Al, 2-15% of Zn, 0.1-5% of Fe, 0.05-5% of Cu, 0.05-5% of Ni, 0-5% of Ag, 0.05-0.5% of Zr, 0.05-0.5% of Ti, and the balance of Mg. The preparation method comprises the following steps of: weighing the components according to the designed component ratio of the magnesium alloy; firstly, putting pure magnesium and pure aluminum into a smelting furnace, putting pure zinc and intermediate alloy of other components into magnesium-aluminum alloy melt after melting; refining, degassing, and stewing after warming to melt; then casting in a protective atmosphere. The light and pressure-proof fast-decomposed cast magnesium alloy is reasonable in component ratio, and simple in craft process; the light and pressure-proof fast-decomposed cast magnesium alloy can be obtained by controlling the ingredients of the alloy; the alloy decomposition performance exceeds that of the traditional cast magnesium alloy; the demands of the multi-stage sliding sleeve staged-fracturing technique on the decomposition performance of the tripping ball material can be met; industrialized application can be achieved; application of the magnesium alloy in the field of exploitation of petroleum and gas is expanded.

The invention discloses a high-performance nitrile rubber sealing material and a preparation method thereof. The high-performance nitrile rubber sealing material is prepared from the following raw materials in parts by weight: 25 to 35 parts of nitrile rubber, 4 to 7 parts of composite sulfurizing reagent, 4 to 5 parts of anti-aging agent, 8 to 15 parts of activating agent, 25 to 30 parts of reinforcing agent and 2 to 5 parts of heat-resistant additive. By adopting the high-performance nitrile rubber sealing material, the problems of poor wear resistance, low tensile strength and low tearing strength in ordinary nitrile rubber are solved, and the prepared product has high mechanical performance and superior high-temperature performance.

The invention discloses a double-rotation SCR denitration method and an apparatus thereof. According to the invention, a first eddy flow catalytic reaction chamber and a second eddy flow catalytic reaction chamber are arranged along a denitrating tower body; a flue gas introduction pipeline is arranged on a sidewall of the denitrating tower body; several eddy flow atomizing nozzles are respectively arranged on inner periphery of the flue gas introduction pipeline and the inner periphery at top of the first eddy flow catalytic reaction chamber; when flue gas is introduced into the flue gas introduction pipeline, the flue gas and ammonia gas injected by the eddy flow atomizing nozzle are mixed, and a mixture enables spiral sinking along circumference of the first eddy flow catalytic reaction chamber from up to down in a tangent circle mode, under effect of a cyclone, and then the mixture enable spiral rise along circumference of the second eddy flow catalytic reaction chamber from down to up in the tangent circle mode. Under prerequisite that high efficiency denitration is ensured, catalyst amount is less, operation of technical means is simple and easy, compared with the prior art, a denitrating tower structure is simple, cost of the apparatus is low, denitration efficiency is high, energy consumption is low, escapement ratio of ammonia is reduced, denitration cost is greatly reduced, and economic benefit is obviously increased.

Sensing device and method for detecting presence and concentration of generic target analytes of interest. The device and method are based on detecting changes in effective dielectric induced by the target analytes of interest. Applications of the invention include, but are not restricted to, detecting and characterizing the presence of chemical and/or biological target analytes of interest as well as detecting and characterizing target analytes of interest from a separation apparatus. In one embodiment of the invention, the device comprises at least two electrodes in a rigid architecture such as a solid surface, where the electrodes have sizes and inter-electrode spacings that are on the order of sizes of target analytes of interest to improve sensitivity of the device. Changes in effective dielectric and, therefore, capacitance induced by a presence of the target analytes of interest are measured electronically. The changes are used to detect the presence of the target analytes of interest and to characterize their presence.

The invention relates to a graphene enhanced aluminium-based silicon carbide composite and a preparation method thereof. The composite comprises the following substances by volume percent: 40% to 70% of silicon carbide and 0.5% to 5% of graphene, and the balance being aluminium alloy. The composite is prepared through the powder metallurgy method and is obtained through the steps of blending, powder mixing, bagging, vacuum degassing and hot iso-hydrostatic forming treatment. The composite has the advantages of high thermal conductivity, high strength, high plasticity, light weight, good thermal diffusivity, isotropy, and the like, and becomes a second-generation electronic packaging material with wide application.

A method of making an alloy powder for an R--Fe--B-type rare earth magnet includes the steps of preparing a material alloy that is to be used for forming the R--Fe--B-type rare earth magnet and that has a chilled structure that constitutes about 2 volume percent to about 20 volume percent of the material alloy, coarsely pulverizing the material alloy for the R--Fe--B-type rare earth magnet by utilizing a hydrogen occlusion phenomenon to obtain a coarsely pulverized powder, finely pulverizing the coarsely pulverized powder and removing at least some of fine powder particles having particle sizes of about 1.0 .mu.m or less from the finely pulverized powder, thereby reducing the volume fraction of the fine powder particles with the particle sizes of about 1.0 .mu.m or less, and covering the surface of remaining ones of the powder particles with a lubricant after the step of removing has been performed.

A method of filling high aspect ratio features with active electronic or conductive materials. In one method, high pressure extrusion is used to urge the as-deposited active or conductive material into an incompletely filled opening. In another method, a rapid thermal anneal process is used to induce reflow of the as-deposited active or conductive material into an incompletely filled opening. Both methods are also effective in densifying active or conductive materials within openings by collapsing voids that arise in the as-deposited state. The instant methods provide for more uniform and consistent filling of openings and minimize the variability and impairment of electrical characteristics of active material devices. Active materials include phase-change materials, chalcogenide materials, switching materials, and programmable resistance materials.

The invention provides an eliminating method for a brittle phase in a laser-repaired nickel-base high temperature alloy, and belongs to the technical field of metal material heat treatment. The eliminating method comprises the steps that the laser-repaired nickel-base high temperature alloy is sequentially subjected to delta aging treatment and delta solution treatment, wherein the temperature ofdelta aging treatment is 850-970 DEG C, and the temperature of delta solution treatment is 1015-1035 DEG C. In the method, delta aging treatment is carried out on the laser-repaired nickel-base high temperature alloy at first, and the Laves brittle phase is eliminated; and then delta solution treatment is carried out at the temperature of 1015-1035 DEG C for eliminating the delta phase separated out in the previous step. Since the temperature of delta solution treatment is lower than the solution temperature for eliminating the Laves phase in conventional heat treatment, damage caused by hightemperature solution on the alloy structure and the mechanical property can be avoided, and the mechanical property of the nickel-base high temperature alloy is obviously improved along with eliminating of the Laves phase.

The invention relates to an oxygen-enriched combustion poly-generation process and equipment for a steam injection boiler in an oil field. According to the invention, air is subjected to deep cooling air separation so as to obtain nitrogen and pure oxygen; the pure oxygen is introduced into a steam injection boiler in an oil field and is mixed and burned with fuel oil so as to obtain CO2-rich flue gas; a part of the CO2-rich flue gas is used as circulation gas and is mixed with the pure oxygen, and mixed gas enters into the steam injection boiler; the rest part of the CO2-rich flue gas is compressed and condensed by using a CO2 liquefaction system so as to obtain high purity CO2, and the high purity CO2 is delivered to an oil displacement system of the oil field; flue gas which has undergone condensation and removal of CO2 enters into a SO2 and NOx recovery system so as to realize condensation and recovery of SO2 and NOx. According to the invention, the technology of oxygen-enriched combustion is introduced into the steam injection boiler, which enables the problem of storage of CO2 to be overcome and allows recovery and treatment of residual flue gas to be realized by using a simple method, thereby realizing integrated simultaneous removal of pollutants and protecting atmospheric environment; since a plurality of byproducts are obtained, considerable economic benefits can be achieved.

The invention provides a self lubrication aluminum based composite material and a preparation method thereof, relating to an aluminum based composite material and a preparation method thereof. The invention solves the problems of high requirement on equipment, high cost, poor material performance and difficult second shaping and mechanical processing of materials in the synthesis of the prior self lubrication aluminum based composite material. The self lubrication aluminum based composite material is prepared from titanium diboride reinforced particles, aluminum particles or aluminum alloy particles, boron nitride particles and matrix aluminum alloy. The preparation method comprises the following steps: 1. raw materials are weighted according to the volume ratio; 2. the materials except for aluminum alloy are subjected to mixing and preliminary shaping to obtain the prefabricated part, and the prefabricated part is put in a mould and heated; 3. the aluminum alloy is heated until the aluminum alloy is melted; 4. the melted aluminum alloy is cast in the mould for pressure infiltration; and 5. the composite material of the invention is obtained after cooling and demoulding. The self lubrication aluminum based composite material of the invention has the advantages of good strength and elastic modulus, low frictional coefficient, high corrosion resistance, good plasticity and the realization of thermo forming. The preparation method of the invention has the advantages of simple method, easy operation and easy process control.

A method of separating mixed particles in a flotation cell uses a fluidized bed within the cell where particles are fluidized in a quiescent zone by liquid moving upwardly through the fluidized bed. The fluidizing liquid may be provided by the feed or by recycling liquid from upper parts of the cell such as from the disengagement zone. Bubbles are introduced into the lower part of the cell through a mechanical impeller which also breaks up any channels in the mixing zone, or by separate aeration in the bottom of the cell or by introduction through a recycle pipe.

The invention discloses a synchronous laser heat treatment method for laser additive manufacturing a nickel-based high-temperature alloy. According to the method, morphology size and distribution of Laves phase can be effectively regulated and controlled, the Laves phase is converted into a discrete granular shape from a deposited continuous long strip, and the volume fraction of the Laves phase is obviously reduced along with extension of the laser heat treatment time. According to the laser heat treatment method, synchronous heat treatment in a deposition forming process can be realized, local area Laves phase morphology and distribution can be regulated and controlled under the condition that the tissue performance of a laser repair base material area is not influenced, the granular Laves phase which are fined and dispersion distributed is obtained, so that the overall mechanical property of parts is improved, and effective utilization can be obtained in the repair and remanufacturing of the high-temperature alloy structural member; and in addition, the method can also be applied to the fields of high-temperature alloy material preparation, high-temperature alloy structural member rapid manufacturing and the like.

The invention relates to the technical field of biological pharmacy, and especially relates to a purifying method for a recombinant humanized anti-human tumor necrosis factor monoclonal antibody. The method comprises: sampling a to-be purified recombinant humanized anti-human tumor necrosis factor monoclonal antibody sample to a balanced cation exchange chromatographic column, and performing washing, leaching, rebalancing and elution, so as to obtain a purified recombinant humanized anti-human tumor necrosis factor monoclonal antibody solution. A preparation method for the to-be purified recombinant humanized anti-human tumor necrosis factor monoclonal antibody sample comprises: getting Chinese hamster ovary cells integrated with humanized anti-human tumor necrosis factor monoclonal antibody gene, culturing, getting a cell culturing supernatant, and employing protein A to perform affinity chromatography, so as to obtain the to-be purified recombinant humanized anti-human tumor necrosis factor monoclonal antibody sample. Leaching in the method means linear gradient elution. A buffer for rebalancing in the method is a citric acid buffer, an acetic acid buffer or a phosphoric acid buffer. Through the leaching step, the purity of the recombinant humanized anti-human tumor necrosis factor monoclonal antibody is successively improved.

In a cylinder block, at least one member disposed around a bore is made of a metal matrix composite including a ceramic compact having a three-dimensional mesh structure comprised of a plurality of spherical cells and a plurality of communicating pores for allowing adjacent spherical cells to communicate with each other, with the plurality of spherical cells filled with a metal.

The invention relates to a rapid measuring method for carbon acetate stable isotope in table vinegar. The rapid measuring method uses a gas chromatography-combustion-isotope ratio mass spectrography (GC-C-IRMS) to measure, and comprises a step of adopting alcohol to dilute a table vinegar sample, and a step of using gas chromatograph (GC) to separate acetic acid in the diluted sample. The rapid measuring method disclosed by the invention uses GC-C-IRMS to achieve rapid measurement for carbon acetate stable isotope in table vinegar, thus solving a technical difficulty that a series of pre-treatments are needed for purifying acetic acid before measuring the carbon acetate stable isotope in the table vinegar, improving the carbon acetate stable isotope measuring technology, and providing a technical method for identifying whether cereals vinegar and fruit vinegar products are true or false.