487 results about "Fe content" patented technology

An MTJ in an MRAM array or in a TMR read head is comprised of a capping layer with a lower inter-diffusion barrier layer, an intermediate oxygen gettering layer, and an upper metal layer that contacts a top conductor. The composite capping layer is especially useful with a moderate spin polarization free layer such as a NiFe layer with a Fe content of about 17.5 to 20 atomic %. The capping layer preferably has a Ru/Ta/Ru configuration in which the lower Ru layer is about 10 to 30 Angstroms thick and the Ta layer is about 30 Angstroms thick. As a result, a high dR/R of about 40% is achieved with low magnetostriction less than about 1.0 E-6 in an MTJ in an MRAM array. Best results are obtained with an AlOx tunnel barrier layer formed by an in-situ ROX process on an 8 to 10 Angstrom thick Al layer.

A magnetic tunnel junction (MTJ) for use in a magnetoresistive random access memory (MRAM) has a CoFeB alloy free layer located between the MgO tunnel barrier layer and an upper MgO capping layer, and a CoFeB alloy enhancement layer between the MgO capping layer and a Ta cap. The CoFeB alloy free layer has high Fe content to induce perpendicular magnetic anisotropy (PMA) at the interfaces with the MgO layers. To avoid creating unnecessary PMA in the enhancement layer due to its interface with the MgO capping layer, the enhancement layer has low Fe content. After all of the layers have been deposited on the substrate, the structure is annealed to crystallize the MgO. The CoFeB alloy enhancement layer inhibits diffusion of Ta from the Ta cap layer into the MgO capping layer and creates good crystallinity of the MgO by providing CoFeB at the MgO interface.

The invention discloses a technological method for producing high-purity low-iron aluminum sulfate by using coal ash and comprehensively utilizing the coal ash, comprising the following steps of: carrying out mechanical activation, flotation decarburization, magnetic separation for deferrization, aluminum extraction with sulfuric acid, solid-liquid separation, concentration of aluminum sulfate crude liquor, organic alcohol alcoholization for acid rinse, organic alcohol alcoholization for deferrization and aluminum sulfate dewatering and drying on the coal ash to obtain the high-purity low-iron aluminum sulfate with low Fe content. The invention solves the problems on impurity removal and purification of the aluminum sulfate in the recycling process of the coal ash, simplifies the process flow, reduces the energy consumption, solves the technical problem of overlarge accumulation of secondary residue quantity, achieves high extraction ratio of aluminum contained in the coal ash, and realizes the recycling of organic alcohol and sulfuric acid and the comprehensive utilization of side products including unburnt black, magnetic iron powder, iron-containing aluminum sulfate crystals, high-silicon-dust active mineral blending materials or novel silicon-magnesium cement, and the like. The technological method has the advantages of simple process, short flow, easiness for control of a production process, high aluminum extraction ratio, low impurity content of products and stable quality.

An MTJ in an MRAM array or TMR read head is disclosed in which a low magnetization capping layer is a composite having a NiFeHf inner layer formed on a NiFe or CoFeB/NiFe free layer, a Ta middle layer, and a Ru outer layer on the Ta layer. For example, a low magnetization NiFeHf layer is achieved by co-sputtering NiFe and Hf targets with a forward power of 400 W and 200 W, respectively. A higher Hf content increases the oxygen gettering power of the NiFeHf layer and the thickness is modified to change dR/R, RA, and magnetostriction values. A so-called dead layer between the free layer and capping layer is restored by incorporating a NiFeHf layer on the free layer to improve lattice matching. The Fe content in the NiFe target used to make the NiFeHf layer is preferably the same as in the NiFe free layer.

A hydrogenation liquefied high-dispersion iron catalyst from coal consists of active component gamma-FeOOH with Fe content 1í½15wt%(dry base), carrier coal 50í½90wt%(dry base) and impurity water residue. The gamma-FeOOH is distributed in liquefied coal with strip shape, grain size range 60í½200nm and width 20í½100nm. It is cheap, high efficient and easy storage, has small size, high catalyst activity and various resources.

The invention relates to an alloyed hot-galvanized baking-hardened steel plate and the manufacturing method thereof, which solves the problems of the anti-pulverization of the galvanized layer, the surface quality and the baking-hardened value. The mass percentage for the chemical components of a baseplate is as follows: C 0.0015 to 0.0025 percent, Si less than or equal to 0.030 percent, Mn 0.50 to 0.60 percent, P 0.050 to 0.060 percent, S less than or equal to 0.015 percent, N less than or equal to 0.003 percent, sol.Al 0.030 to 0.055 percent, Nb 0.004 to 0.015 percent, O less than or equal to 0.0050 percent and the rest are Fe and unavoidable impurities. The weight of the galvanized layer (for a single side) is 30-60g/m2 and the mass percentage for the Fe component of the galvanized layer is 8 to 12 percent. The steel plate of the invention has excellent anti-pulverization performance of the galvanized layer, excellent surface quality and appropriate baking-hardened value.

A softening-resistant copper alloy contains Fe in an Fe content in the range of 0.01 to 4.0% by mass. The copper alloy has a cube orientation density of 50% or below and a mean grain size of 30 μm or below after being annealed at 500° C. for 1 min. A copper alloy sheet forming method of forming a copper alloy sheet comprises, in successive steps: a hot rolling process for hot-rolling a copper alloy sheet of the copper alloy according to any one of claims 1 to 4, at least two working cycles each of a cold rolling process and an annealing process, and a finish cold rolling process. Reduction ratio for each of the cold rolling processes of the working cycles is in the range of 50 to 80%, and reduction ratio for the finish cold rolling process is in the range of 30 to 85%.

The invention relates to a high-damage tolerance type ultrahigh strength aluminum alloy and a preparation method thereof. The high-damage tolerance type ultrahigh strength aluminum alloy comprises the following components in percentage by weight: 8.5-10.0 percent of Zn, 1.0-2.5 percent of Mg, 1.0-2.0 percent of Cu, 0.06-0.20 percent of Zr, 0.02-0.05 percent of Ti, not more than 0.08 percent of Fe, not more than 0.06 percent of Si and the balance of Al and unavoidable impurities, wherein the Fe content is larger than Si content. The method comprises the following steps: firstly, smelting and casting; then carrying out homogenization on an alloy casting blank by stages, carrying out hot rolling on the homogenized casting blank and carrying out solid dissolution on a hot rolled plate; prestretching the plate in four hours after quenching; and finally immediately carrying out double-stage ageing processing on the prestretched plate. The obtained alloy has higher strength and damage tolerance and is suitable for being applied in an airplane part exposed in the atmospheric environment for a long time.

A giant magnetoresistance (GMR) sensor with strongly pinning and pinned layers is described for magnetic recording at ultrahigh densities. The pinning layer is an antiferromagnetic (AFM) iridium-manganese-chromium (Ir—Mn—Cr) film having a Mn content of approximately from 70 to 80 atomic percent and having a Cr content of approximately from 1 to 10 atomic percent. The first pinned layer is preferably a ferromagnetic Co—Fe having an Fe content of approximately from 20 to 80 at % and having high, positive saturation magnetostriction. The second pinned layer is preferably a ferromagnetic Co—Fe having an Fe content of approximately from 0 to 10 atomic percent. The net magnetic moment of the first and second pinned layers is designed to be nearly zero in order to achieve a pinning field of beyond 3,000 Oe.

The invention provides an alloyed zinc aluminum magnesium alloy coated steel plate and a production method thereof. The coating has an Fe content of not more than 5%, the coating surface contains an MgZn2 phase, which has a particle size of not greater than 5 micrometers. The coating surface is in the form of equiaxed grains, and in the coating, Mg accounts for 1.5-8wt%, aluminum accounts for 1.5-15wt%, and rare earth accounts for 0-0.2wt%. According to the production method, cold rolled strip steel is subjected to continuous annealing and hot dipping in a continuous hot dip galvanizing unit, and then alloy treatment is carried out on the hot-dip galvanized zinc aluminum magnesium steel plate. Chemically, a plating solution comprises 1.0-11wt% of Al, 0.5-5wt% of Mg, and the balance Zn and inevitable impurities. After the steel plate undergoes annealing by N2 containing 0.5%-30 vol % of H2, the steel plate is immersed in the plating solution at a temperature of 450-650DEG C, the steel plate enters a zinc pot at 420-580DEG C, and the immersion plating time of the steel plate in the plating solution is 1-10s. After air knife cooling, the zinc aluminum magnesium steel plate enters an alloying furnace to undergo alloying treatment, the alloying temperature is 450-650DEG C, the alloying time is 3-20s, and then the steel plate is cooled at a speed of 10-50DEG C/s. The steel plate provided by the invention ensures that the coating does not fall off in a complex forming process, and after forming, the zinc aluminum magnesium coating can put its excellent corrosion resistance to good use, thus prolonging the service life of components.

The invention provides a method for measuring iron content in steel slag. The method includes grinding and screening a steel slag sample by multiple times; completely separating granular metal substances from slag in the steel slag sample; measuring the mass of the granular metal substances by a physical process; measuring iron content of the slag by a titanium trichloride and potassium dichromate volumetric process; and computing the full iron content of the steel slag sample via data of the iron content of the slag and the mass of the granular metal substances. The method has the advantages of convenience in operation, high accuracy of the measured iron content and good stability, repeatability and accuracy of a measuring result. Besides, as proved by tests, the method is reliable and practical, and the requirement on measuring iron content in steel slag in daily life can be met.

This invention discloses a method for hot-dip galvanizing on steel work piece. The method comprises: checking black work piece, suspending, degreasing, rinsing, washing with acid, rinsing, treating with a galvanizing aid, drying with hot air, hot-dip galvanizing and cooling. During the hot-dip galvanizing process, Al, Ni, Si and rare earth element are added into the galvanizing solution. The galvanizing solution comprises: Al 7-9 wt. %, Ni 3-6 wt. %, Si 0.5-0.8 wt. %, rare earth element 0.5-1.0 wt. %, and Zn as balance. The addition of Si can reduce Fe content in the galvanizing solution, and the formation of Zn-Fe alloy residue. The Zn consumption is lowered by nearly 1%, and the surface quality of galvanized steel is improved.

A copper alloy of high strength and high electroconductivity which is excellent in characteristics such as strength, electroconductivity and bending formability required as copper alloys for use in electric and electronic parts such as lead frames, terminals and connectors, as well as excellent in the characteristics such as softening resistance, shearing formability. Ag plating property and soldering wettability, the copper alloy comprising: Ni: 0.1 to 1.0% (means mass % here and hereinafter), Fe: 0.01 to 0.3%, P: 0.03 to 0.2%, Zn: 0.01 to 1.5%, Si: 0.01% or less; and Mg: 0.001% or less; in which the relation between the P content and the Si content satisfies the relation: P content/Si content>=10, and the relation for the Ni content, the Fe content and the P content can satisfy following relations: 5<=(Ni content+Fe content)/P content<=7 4<=Ni content/Fe content<=9.

A cam follower includes a shaft member which is cantilevered at one end and a slide bearing fitted onto the outer periphery of the other end of the shaft member. The slide bearing is composed of a cylindrical matrix made of an Fe-based sintered metal material having an Fe content of 90 wt % or more and a slide layer formed from the inner peripheral surface to the both end faces of the matrix. The slide layer is made of a slide material composition having a base material such as polyethylene resin blended with a lubricant such as silicone oil and a globular porous silica impregnated with this lubricant.

The invention relates to an ordinary brass full-elemental analysis apparatus based on a laser-induced breakdown spectroscopy, and a method thereof, and belongs to the technical field of analytical chemistry. The apparatus comprises a laser, a spectrometer, a delay generator, a focusing lens, a collecting lens, optical fiber, a sample and a computer. The laser and the spectrometer are respectivelyconnected to the delay generator. The spectrometer is connected with the computer. The optical fiber is connected with the spectrometer. The focusing lens is arranged between the laser and the sample. The collecting lens is connected with the spectrometer by the optical fiber. The analysis method comprises: establishing working curves of Cu, Pb, Fe and Ni, and verifying the working curves. The apparatus and the method are applicable for analyzing the Cu content, the Pb content, the Fe content and the Ni content in the ordinary brass.

The invention provides a malted brown rice containing rich nutritive elements, its preparation method and application, wherein the preparation comprises steeping the husked paddy seeds into nutrient solution, accelerating germination photophygously, finally drying the rice seeds. The nutrient solution comprises ferrous sulfate solution with Fe content of 500-3000 ug/g, zinc sulphate solution with the Zn content of 500-3000ug/g, sodium selenate solution with the Se content of 5-50ug/g, chromium trichloride solution with the Cr content of 50-1000ug/g, and cobaltous chloride solution with the Co content of 5-100ug/g.

The invention relates to a kiln slag processing technology of a zinc volatilizing kiln, which is characterized by comprising the technological steps of crude crushing and prescreening, medium crushing and fine crushing, two-section and three-stage magnetic separating Fe fined powder, four-stage magnetic separating and re-separating carbon refined powder by an air medium. The invention has the advantages of simple technology, high production efficiency, stable product quality and low energy consumption and enhances the utilization rate of resources, the Fe content of the finally separated Fe refined powder can be about 60%, and the Fe refined powder according with the national requirements can be separated without secondary processing.

The present invention provides a method for preparing ferrous lithium phosphate by using semi-wet method. Said method includes the following steps: in the compounds containing Li, Fe and P selecting one water-insoluble compound and others are water-soluble, placing the above-mentioned water-insoluble compound into the above-mentioned water-soluble compound solution to obtain a suspension; in said suspension Li content, Fe content and P content must be met with the following formula: [mLi+n(1-m)/n M]:Fe:qPO4=1:1:1(1), in formula (1) n is chemical valence of alloying element M, m is mole number of Li, (1-m)/n is mole number of alloying element M and P and q respectively are mole numbers of Fe and PO4; adding reduction electro-conductive additive, spraying and pyrolyzing suspension so as to obtain precursor powder, roasting said precursor powder and pulverizing to obtain the invented product.

Iron particles for purifying soil or ground water of the present invention comprise a mixed phase of α-Fe phase and Fe₃O₄ phase, and having a BET specific surface area of 5 to 60 m²/g, an Fe content of not less than 75% by weight based on the weight of the iron particles and a sulfur content of not less than 1,000 ppm. The iron particles are capable of decomposing or insolubilizing harmful substances such as organohalogen compounds and/or heavy metals, cyanogen, etc. contained in the soil or ground water in efficient, continuous and economical manners.

The invention discloses a soil heavy metal restoration agent and a preparation method thereof. Modified biomass charcoal impregnated by calcium-rich element and iron and manganese oxides is adopted as the carrier, and a nanoscale magnetic material is employed to coat the carrier. The product has a particle size of 0.25-5mm, and has a Fe content of 2-5%, a Mn content of 5-10%, and a Ca content of 10-15%. The restoration agent has certain restoration effect on single and compound pollution of cadmium, chromium, arsenic, lead and mercury under different pH backgrounds, thus having certain contribution effect on contaminated soil restoration and food safety. The restoration agent prepared by the method provided by the invention can fully and effectively utilize restoration materials with special passivation effect on heavy metals, and achieves the purpose of spectral restoration of heavy metal contaminated soil.