81 results about "Partial oxygen" patented technology

The present invention relates to a welding method for a second generation high temperature superconducting wire including a substrate, a buffer layer, a superconductor layer, and a stabilizing material layer, wherein parts of the stabilizing material layers contained in two strands of the second generation high temperature superconducting wire are removed, the superconductor layers of two strands of the second generation high temperature superconducting wire exposed by the removal of the stabilizing material layer abut each other and are heated to the melting point of the superconductor layer to melt-diffuse the abutting superconductor layers and weld two strands of the second generation high temperature superconducting wire together. Subsequently, the welded portion is oxygenation-annealed under an oxygen atmosphere to recover superconducting properties of the second high temperature superconducting wire. The above-described configuration of the present invention enables superconductor layers to directly abut each other and to be melt-diffused without using a mediator, thus producing a wire having a full length with a rare junction resistance as compared to a normal conduction junction method. Specifically, the present invention brings a partial oxygen pressure to a nearly vacuum state to lower the melting point, thereby enabling junction processes to be performed without melting a stabilizing material layer containing silver (Ag).

This invention is for a hermetic piezoelectric accelerometer sensor that can operates at high temperatures without the degradation observed on the piezoelectric elements, due to Oxygen depletion of the piezoelectric materials, when they are exposed to high temperatures, in reducing atmospheres, or low partial Oxygen pressure, inside a sealed housing. When a piezoelectric element loses Oxygen, becomes more electrically conductive, and this severe loss in resistivity, exacerbated with the increase of the temperature, makes the sensor inoperable, unreliable, or with permanent damage. The accelerometer of this invention operates effectively over a wide range of temperatures, including high temperatures above 1600° F., depending of the piezoelectric element used on the construction. The housing of the accelerometer uses a small section of metal made with Silver (or Silver alloys) to allow Oxygen diffusion through the metal, when it is exposed to high temperature. This permits that the construction of the accelerometer housing, can be sealed hermetically; and the piezoelectric elements of the sensor have increased lifetime, with enough partial pressure of Oxygen inside the housing.

A low energy cost process for the co-production of oxygen and nitrogen product gases employs a fuel feed tube (506) which extends into oxygen selective ion transport membrane (424) whereby fuel (440) is introduced adjacent its closed end and flows concurrently with oxygen containing gas in annulus (510) and an oxygen selective ion transport membrane having separator section (436) and reactor section (438). Oxygen-containing feedstock (406) is compressed and then contacts cathode side (426) of separator section (436) where a portion of the oxygen is transported to anode side (428) and recovered as an oxygen product gas. Substantially the remainder of the oxygen is transported from cathode side (426) to anode side (428) and exothermically reacted with a fuel. Hot nitrogen rich product gas is expanded into a turbine to generate the power necessary to compress the feedstock.

The invention discloses a method for preparing iron-nitrogen codoped mesoporous nano titanium dioxide by a fast sol-gel method. In the method, a polymer with a molecular weight of 2*10<4>-3*10<6> is used as a template agent, and simultaneously, the template agent reacts with titanium-source hydrolysate to form a hydrogen bond so as to be fast gelated; and simultaneously, an iron source and a nitrogen source are uniformly dispersed in a uniform gel system, and then codoped mesoporous titanium dioxide is obtained by calcination. In the method, the iron element and nitrogen source are codoped and enter crystal lattices of nano titanium dioxide, wherein Fe<3+> becomes a center of capturing photoelectrons, thereby prolonging the survival time of photoholes; nitrogen atoms substitute partial oxygen atoms, so that the forbidden band width of titanium dioxide is reduced, the photoresponse range is enlarged, and titanium dioxide has a certain absorption in a visible light range; and simultaneously, on the basis of the traditional sol-gel method, the defect of long preparation period is overcome by using the method disclosed by the invention. A sample prepared by using high polymers such as polyacrylamide and the like as the template agent has mesopore duct and large specific surface area, and the photocatalysis efficiency is improved.

The inventive method of manufacturing an oxide superconducting wire comprises a step (S1, S2) of preparing a wire formed by covering raw material powder of an oxide superconductor with a metal and a step (S4, S6) of heat-treating the wire in a pressurized atmosphere, and the total pressure of the pressurized atmosphere is at least 1 MPa and less than 50 MPa. Thus, formation of voids between oxide superconducting crystals and blisters of the oxide superconducting wire is suppressed while the partial oxygen pressure can be readily controlled in the heat treatment, whereby the critical current density can be improved.

The invention provides a process method for reducing RH vacuum decarbonization end-point oxygen content of ultra-low-carbon steel and belongs to the technical field of production and processing of ultra-low-carbon steel. The process method comprises the following steps: 1) in an early period of RH vacuum decarbonization, adding a pollution-free deoxidant from a feed bin to a vacuum chamber, and removing partial oxygen from the steel; 2) further reducing vacuum degree for deep carbonization; and 3) after the RH vacuum decarbonization treatment is finished, using aluminum particles as a final deoxidant, and deoxidizing and alloying other alloy elements according to steel grade requirements. By the process method, the RH decarbonization end-point oxygen content can be reduced, and the active oxygen content of molten steel is controlled to be 250-400ppm when the RH decarbonization is finished, so that the consumption of final deoxidizing aluminum particles is reduced, the inclusion content in the molten steel is reduced, the cleanness of the molten steel is improved, the production cost is reduced and the quality of the ultra-low-carbon steel is obviously improved.

The present invention relates the methods, compositions and devices for priming of plant seed, preferably seed of crop plants, and seeds obtained with the methods, compositions and devices, wherein the metabolic activity necessary for germination of the seed is not controlled by water but rather by the partial oxygen pressure and / or partial carbon dioxide pressure. In the methods of the invention, the partial oxygen or carbon dioxide pressure may be measured by oxygen / carbon dioxide sensitive fluorescent dye. The invention further relates to processes for producing a primed seed lot of a plant species and to a container comprising primed seed under an atmosphere with a partial oxygen pressure that is below the critical oxygen pressure.

This invention is for a hermetic piezoelectric accelerometer sensor that can operates at high temperatures without the degradation observed on the piezoelectric elements, due to Oxygen depletion of the piezoelectric materials, when they are exposed to high temperatures, in reducing atmospheres, or low partial Oxygen pressure, inside a sealed housing. When a piezoelectric element loses Oxygen, becomes more electrically conductive, and this severe loss in resistivity, exacerbated with the increase of the temperature, makes the sensor inoperable, unreliable, or with permanent damage. The accelerometer of this invention operates effectively over a wide range of temperatures, including high temperatures above 1600° F., depending of the piezoelectric element used on the construction. The housing of the accelerometer uses a small section of metal made with Silver (or Silver alloys) to allow Oxygen diffusion through the metal, when it is exposed to high temperature. This permits that the construction of the accelerometer housing, can be sealed hermetically; and the piezoelectric elements of the sensor have increased lifetime, with enough partial pressure of Oxygen inside the housing.

The invention provides an air supplying device of a blast furnace. Pipeline bricks are wholly or partially installed from a channel opening of a peephole to a whole hot air channel of a belly pipe outlet so that the hot air channel is divided into inner and outer two layers, namely a central channel and an annular channel; and hot air is wholly or partially isolated between the central channel and the annular channel. According to a combustion method of injected coal powder provided by the invention, a spraying gun is inserted to the central channel to carry out coal powder injection; after the injected coal powder is partially combusted or heated in the central channel, the injected coal powder and the hot air coaxially enter into an air opening and the furnace to be completely combusted. According to an oxygen-enriching method provided by the invention, oxygen gas is limited in the central channel to be mixed with less hot air so that a partial oxygen-enriched atmosphere which is good for combusting the coal powder is formed. A secondary coal injection technology which is firstly proposed and reliably realized and is carried out at the outlet of the central channel since the first coal injection patent technology in 1926 is also called as a coaxial coal injection technology.