185 results about "Co element" patented technology

The present invention relates to 'compound metal oxide and nitride catalyst for low-temperature selective catalytic reduction of ammonia' and pertains to the field of catalysts. In A-B-C compound metal oxide, A is a or multiple kinds of lanthanide series metals, B is a or multiple kinds of transition metals, C is a or multiple kinds of alkaline or alkaline earth metals, A must contain La, and when C content is zero, B is not Co element alone. As proved by experiments, the compound metal oxide of the present invention can obviously raise the conversion rate from NO to NO2. When the oxide contains A, B and C elements, its activity will be higher than that only containing A and B elements. Meanwhile when this compound metal oxide of the present invention is used as a catalyst together with copper and iron molecular sieve, it may realize the function of low-temperature selective catalytic reduction of ammonia, particularly below 200 DEG C, it makes the industrialization of SCR technique simpler and more energy conserving.

The invention relates to a method for improving the bonding strength of a hard alloy and a diamond coating. The method is realized by the technical scheme that by adopting a double glow plasma surface alloying technology, taking a metal carbide forming element material or a composite material of metal carbide forming elements as a target, inert gases as protecting gases, as well as carbon-containing gases as precursors, a diffusion barrier layer is prepared on the surface layer of the hard alloy, and then the diamond coating is deposited on the hard alloy surface on which the diffusion barrier layer is prepared by using a chemical vapor deposition method. By the use of the diffusion barrier layer prepared by the method disclosed by the invention, the diffusion of Co element to the surface layer of the hard alloy can be effectively stopped, the damage to a hard alloy matrix due to a surface Co removing treatment method is avoided, and the interface stress problem introduced by a transition layer applying method due to new interface addition can be avoided, so that the bonding strength between the diamond coating and the hard alloy matrix can be greatly improved.

The invention discloses a preparing method of a PCD cutter long in service life. The preparing method comprises the first step of line cutting of a PCD blade, the second step of vacuum welding of the PCD blade, the third step of precise laser machining of the PCD cutter, and the fourth step of the cobalt removing treatment measure of a PCD layer. By means of the manner, the oxidation effect of a front cutter face of the PCD cutter is weakened, meanwhile, the size of a broken blade of a cutting edge is controlled within 2 microns, and distribution of the Co element and the W element at the cutting edge is even. The distribution of the Co element and the W element on a rear cutter face is even along with the increasing of the layer thickness. The welding temperature is reduced through low-temperature welding flux, the tendency of graphitization of the PCD cutter is reduced, and the service life of the cutter is prolonged.

The invention discloses castable and forgeable solid solution tungsten alloy and a preparation method, and belongs to the technical field of refractory alloy. According to the chemical components, thecastable and forgeable solid solution tungsten alloy comprises, by weight percentage, 20%-75% of W, 0%-20% of Mo, 0%-20% of Nb, 0%-20% of Ta, 0%-10% of Hf, 0%-10% of V, 0%-10% of Zr, 0%-10% of Ti, 0%-10% of Al, 0%-5% of Cu and the balance Ni or Co and inevitable impurity elements and microelements, specifically, the Ni element and the Co element can be partially replaced by one or two or more elements of 0%-50% of Ir, 0%-30% of Fe, 0%-20% of Cr, 0%-20% of Re and 0%-20% of Ru. The castable and forgeable solid solution tungsten alloy further comprises the following one or two or more grain boundary strengthening elements of 0.001%-1.0% of C, 0.001%-1.0% of B, 0.001%-1.0% of Y, 0.001%-1.0% of La or Ce or the rare earth element, 0.001%-1.0% of Mg and 0.001%-1.0% of Ca. The castable and forgeable solid solution tungsten alloy has the advantages of being high in density, ultrahigh in strength, high in toughness and high in hot-working performance. The alloy is castable and forgeable and canbe formed through 3D printing, the density ranges from 11.0g/cm<3> to 15.0g/cm<3>, the impact toughness is 80J/cm<2> or above, and the tensile strength is 1700MPa or above.

To provide a cathode active material which achieves a high discharge capacity and excellent cycle durability.

A cathode active material represented by Li_aMO_x (wherein M is an element including at least one member selected from Ni element, Co element and Mn element (other than Li element and O element), “a” is from 1.1 to 1.7, and x is the number of moles of O element required to satisfy the valences of Li element and M),

• • wherein in an X-ray diffraction pattern, the ratio (I/r) of the crystallite size (I) of (003) plane to the crystallite size (r) of (110) plane assigned to a crystal structure with space group R-3m is at least 2.6.

The invention relates to FeSiBAlNiCo block high-entropy alloy and a preparation method thereof and belongs to the technical field of powder metallurgy. According to the FeSiBAlNiCo block high-entropy alloy, the molar ratio of Fe to Si to B to Al to Ni to Co is 1: 1: 1: 1: 1: (0-1); the crystal structure comprises a face-centered cubic (FCC), a body-centered cubic (BCC) and two-phase intermetallic compounds, namely FeSi and FeB. According to the FeSiBAlNiCo block high-entropy alloy and the preparation method thereof, the Co element of a medium size is added to the Fe-Si-B-Al-Ni quinary alloy, a spark plasma sintering technology is utilized, and the block high-entropy alloy with the diameter being 15 mm is prepared. The density of the high-entropy alloy reaches 96.5% or above, the hardness value reaches 1100 HV or above, prominent NaCl solution corrosion resistance is achieved, and special requirements of certain adverse environments can be met. The block high-entropy alloy is prepared through a powder metallurgic method, and the process is relatively simple; a prepared product has the advantages that few defects exist, and performance is excellent.

A catalyst for production of a carbon fiber is obtained by dissolving or dispersing [I] a compound containing Fe element; [II] a compound containing Co element; [III] a compound containing at least one element selected from the group consisting of Ti, V, Cr, and Mn; and [IV] a compound containing at least one element selected from the group consisting of W and Mo in a solvent to obtain a solution or a fluid dispersion, and then by impregnating a particulate carrier with the solution or the fluid dispersion. By means of a step of bringing a carbon source into contact with the catalyst in a vapor phase, the carbon fiber is obtained which is tubular and in which a graphite layer is approximately parallel with the carbon fiber axis, and a shell is in a multi-walled structure.

The invention discloses an AlCoCrFeMn high-entropy alloy with a non-equal atomic ratio and a preparation method of the AlCoCrFeMn high-entropy alloy. The atomic ratio of all elements of Al to Co to Crto Fe to Mn in the high-entropy alloy is equal to (0.3-0.7): to 2 to 1 to 1 to 1. The preparation method comprises the following steps that (1) a raw material is taken in proportion, and cleaning anddrying are conducted; (2) the raw material is put into a non-consumable arc melting furnace, vacuumizing is conducted and protective gas is added; (3) Ti which is arranged in the furnace in advance is firstly smelted, then the raw material is smelted, and suction casting is conducted by using a copper mold to form an alloy ingot; (4) the alloy ingot is subjected to solid solution, water quenchingand rolling deformation; and (5) the deformed alloy ingot is annealed to obtain the AlCoCrFeMn high-entropy alloy with the unequal atomic ratio. According to the AlCoCrFeMn high-entropy alloy with the non-equal atomic ratio and the preparation method of the AlCoCrFeMn high-entropy alloy, by adding a certain amount of Co element, the strength of the high-entropy alloy is improved, the content of the Co element is increased, and the alloy has good thermal stability; and the plasticity of the high-entropy alloy is adjusted by adding a certain amount of Al element, and the prepared high-entropy alloy has good strength and plasticity.

To provide a cathode active material to be used for a positive electrode of a lithium ion secondary battery having a high discharge capacity and favorable cycle durability.

A cathode active material, which comprises a lithium-containing composite oxide containing at least one transition metal element (X) selected from the group consisting of Ni element, Co element and Mn element, and Li element (provided that the molar ratio (Li/X) of the Li element based on the total amount of the transition metal element (X) is from 1.1 to 1.7),

wherein the aspect ratio of primary particles is from 2.5 to 10, and

in an X-ray diffraction pattern, the ratio (I₀₂₀/I₀₀₃) of the integrated intensity (I₀₂₀) of a peak of (020) plane assigned to a crystal structure with space group C2/m to the integrated intensity (I₀₀₃) of a peak of (003) plane assigned to a crystal structure with space group R-3m is from 0.02 to 0.3.

The invention discloses a ferrite magnetic material and a manufacturing method thereof. In the ferrite magnetic material, a composition shown by a combined formula of A1-xLax(Fe12-yCoy)zO1+18Z is used as a main component; in the formula, A is at least one element selected from Sr, Ba and Ca; x is 0.001-0.039; y is 0.01-0.2; and z is 0.80-0.89. According to the invention, by adding strontium carbonate and trace La element into a ball milling process, solid solubility of Co element in the ferrite can be improved, the magnetic performance of the ferrite can be greatly improved, and the production cost is low; and through the material and the method, permanent magnetic ferrite with Br greater than or equal to 4,100 G and Hcj greater than or equal to 4,000 Oe can be obtained.

A nanometer rare earth permanent magnetic material with the high-temperature stability is characterized in that a basic expression is RxFe100-x-z-y BzNy, wherein R is one or a plurality of lanthanide series rare earth elements of neodymium, praseodymium and the like, Fe is an iron element, B is an boron element, N is one of elements of niobium, zirconium and the like, x is a number ranging from 15 to 36, z is a number ranging from 2 to 10, and y is a number ranging from 4 to 10. Preferentially, x is a number ranging from 18 to 32, z is a number ranging from 2.6 to 8.5, and y is a number ranging from 4.8 to 9. The invention further provides a preparation method of the rare earth permanent magnetic material. A Co element is not added, and the material has the advantages of being low in cost and high in working temperature and intrinsic coercivity.

An integrated circuit device includes a Cu pillar and a solder layer overlying the Cu pillar. A Co-containing metallization layer is formed to cover the Cu pillar and the solder layer, and then a thermally reflow process is performed to form a solder bump and drive the Co element into the solder bump. Next, an oxidation process is performed to form a cobalt oxide layer on the sidewall surface of the Cu pillar.

The invention discloses a simple and convenientindustrial method for recovering the Co element from NdFeBmagnetwaste materials. The simple and convenientindustrial method comprises the steps as follows: material oxidation, preferential dissolution leaching, oxidation hydrolysis, Co element recovery, compound preparation and the like. According to the technical route design, the variable valence characteristic of the Co element and stability difference of bivalent Co and trivalent Co are combined skillfully. According to the method, flow matching and technology integration between the Co recovery process link and the conventional rare earth recovery assembly line in the domestic NdFeBwaste material recovery industry can be realized; in the aspect of technical target, the same principle is followed, the Co element is effectively entrapped and recovered at the front end of the whole flow based on the process steps includingmaterial oxidation, preferential dissolution leaching and oxidation hydrolysis, meanwhile, interference of a leachatesystemby Fe and Co elements in the follow-up procedure is avoided, and a rare earth extraction separation process is realized.

The invention discloses Cu-reinforced Co-free secondary-hardening ultrahigh-strength steel and a preparation method, belonging to the technical field of alloy steel. The steel comprises the following chemical components in percentage by weight: 0.20-0.50% of C, 1.0-5.0% of Cr, 8.0-30.0% of Ni, 1.0-5.0% of Mo, 1.0-5.0% of Cu, 0-3.0% of Al, 0-2.0% of W, less than or equal to 0.30% of V, less than or equal to 0.20% of Nb and the balance of Fe and unavoidable impurities. According to the preparation method, the vacuum induction and vacuum consumable remelting technology or the vacuum induction and electroslag remelting technology can be adopted. Compared with the prior art, the Cu-reinforced Co-free secondary-hardening ultrahigh-strength steel has the advantages of good comprehensive performance, higher strength, good plasticity and toughness, good heat treatment process performance and higher tempering resistance and overaging resistance; the content of strategic resource Co element is saved and the economical efficiency is remarkably improved.

This invention relates to a new Ni base high temperature alloyed material used in rolls and its hot process technology, which takes K403 alloy as the base and adjusts composition of the alloy to eliminate Co element and adds W, Nb and Fe suitably to melt it in vacuum, then carries out different hot processes to get the nickel base alloy, which replaces traditional roll materials and has the performance of anti-high temperature and oxidation, anti-hot impact and high temperature intensity to prolong its life time.

The invention discloses a supported type catalyst which comprises a carrier as well as an active ingredient Co element, a noble metal MNoble element and a non-noble metal auxiliary element supported on the carrier. The supported type catalyst is characterized in that a weight ratio of Co to the noble metal (in terms of a metal element) meets a relationship (MNoble/MCo)XPS/(MNoble/MCo)XRF=2.0-20.0, wherein MNoble/MCo)XPS is a weight ratio of a catalyst noble metal component represented by X-ray photoelectron spectroscopy to Co in terms of metal elements; and (MNoble/MCo)XRF is a weight ratio of the catalyst noble metal component represented by X-ray fluorescence spectrum to Co in terms of metal elements. The noble metal component is at least one of Pt, Pd, Ru, Rh and Ir. The invention also provides a preparation method for the catalyst and the Fischer-Tropsch synthesis method for the catalyst. Compared with a catalyst with the same metal content prepared in the prior art, the supported type catalyst has the advantages that a Fischer-Tropsch synthesis catalyst containing noble metal has relatively high C<5+> selectivity and relatively low methane selectivity while relatively high reaction activity is kept.

The invention relates to an olefin hydroformylation heterogeneous Co-based catalyst and a preparation method thereof. The technology problem of homogenous phase catalyst separation is solved, and theproblem that an existing heterogenous catalyst is low in target product yield is solved. A Co element is loaded on a carrier with the high specific surface area, modification is performed, a Co-basedload type heterogenous catalyst with M1xM2yCoAx being the active ingredient is formed, the Co atom electron state is changed, active loci can be evenly dispersed, the activity can be improved, and thehigh stability in air is achieved. The preparation method of the catalyst is simple and easy to store, and the obtained target product aldehyde yield is high.

The invention discloses high-strength, high-toughness and anti-corrosion cobalt-free high-entropy alloy and a preparation method thereof. In the high-strength, high-toughness and anti-corrosion cobalt-free high-entropy alloy, the atomic percent of Fe: Ni: Cr: Mn: Al is 30-27.5% : 30-27.5% : 15% : 10% : 15-20%. A preparation technology of the high-strength, high-toughness and anti-corrosion cobalt-free high-entropy alloy comprises the following steps: selecting the five elements including Fe, Ni, Cr, Mn and Al with the purity of each being 99.9wt% as the raw material for batching, and utilizinga non self-consuming electric arc furnace to prepare the high-entropy alloy through smelting. The high-entropy alloy is uniform in texture, shows excellent comprehensive mechanical property, does notcontain the expensive Co element and is low in price. The yield strength of the high-entropy alloy is equal to or greater than 770MPa, the breaking strain is equal to or greater than 45%, the corrosion resistance of the high-entropy alloy to 3.5wt.% NaCl is better than the corrosion resistance of stainless steel SUS 304 to 3.5wt.% NaCl, and the application prospect is broad.

The invention discloses a Fe-Co-Mo-P-C series amorphous alloy electrocatalyst as well as a preparation method and application thereof. The ingredient of the Fe-Co-Mo-P-C series amorphous alloy electrocatalyst is FexCoyMo<80-x-y>P<20-z>Cz, wherein x, y and z are the atomic percentages of the Fe element, the Co element and the C element, x is no less than 10 and no greater than 40, y is no less than10 and no greater than 40, and z x is no less than 0 and no greater than 15. The Fe-Co-Mo-P-C series amorphous alloy electrocatalyst is prepared through the melt rotary quenching method, has high vitrification forming ability and electrocatalytic activity within the wider ingredient range, is an excellent hydrogen evolution reaction electrocatalyst and has wide commercialization application prospect.

The invention discloses a CoCrNi medium-entropy alloy and a technology for preparing the CoCrNi medium-entropy alloy through an atomization powder preparation method. The technology comprises the steps that a Co element simple substance block, a Cr element simple substance block and a Ni element simple substance block are smelted according to a specified proportion to prepare a CoCrNi alloy bar; the CoCrNi medium-entropy alloy is prepared from the CoCrNi alloy bar used as a raw material through an electrode induction melting gas atomization method. The prepared CoCrNi medium-entropy alloy is in a standard FCC phase, free of microscopic segregation, round in overall shape and small and uniform in particle size. According to the technology, smelting by a medium-frequency smelting furnace and the EIGA technology are combined, the defects that an existing CoCrNi medium-entropy alloy is uneven in mixing, has microscopic segregation and is large in particle size are overcome, and the technology is simple, suitable for large-scale production, low in cost and good in application prospect.

The invention relates to a Ni-Fe-Ga-Co high-temperature magnetic-drive memory alloy which belongs to a memory alloy. The invention solves the problem that the traditional magnetic-drive shape memory material can not meet the relational expression that Ms is less than Tc and is more than 100 DEG C. The molecular formula of the Ni-Fe-Ga-Co high-temperature magnetic-drive memory alloy is Ni56Fe17Ga27-xCox, wherein x is 2-6. A Co element is added in the Ni-Fe-Ga-Co high-temperature magnetic-drive memory alloy to obtain a Ni-Fe-Ga-Co alloy meeting the relational expression that Ms is less than Tc and is more than 100 DEG C. The Ni-Fe-Ga-Co high-temperature magnetic-drive memory alloy can be used at high temperature, especially, Ms and Tc of a Ni56Fe17Ga21Co6 alloy are respectively 177 DEG C and 201 DEG C, thereby guaranteeing the application of the high-temperature magnetic-drive memory alloy under high temperature environment.