44 results about "Nickel boride" patented technology

The invention relates to a C5 / C6 alkane isomerization catalyst loaded with nickel boride as well as a preparation method and an application method thereof. The catalyst comprises a carrier and the nickel boride the weight of which is 1-5% of that of the carrier, wherein the carrier is formed by aluminium oxide and an H beta molecular sieve; the weight ratio of the aluminium oxide to the H beta molecular sieve is (1:9)-(9:1). According to the catalyst provided by the invention, halogen components are not needed to be added, and noble metals are not used, so that the environmental pollution is avoided and the catalyst cost is reduced; besides, the catalyst can be directly used for isomerization process without requiring pre-hydrogenation for reduction. Tests prove that when the catalyst is used for isomerization reaction for catalyzing n-hexane and n-pentane, the activity of the catalyst is higher, and the isoalkane selectivity and the catalyst stability are better.

Provided is a Ag-based conductive paste for a terminal electrode which suppresses oxidation of the Ni surface of an internal conductor and therefore brings about excellent joining with Ni even when baking is performed in the atmosphere in the case where Ni is used as the internal conductor of a laminated ceramic electronic component. The conductive paste includes at least one of an Ag powder and an Ag alloy powder, a nickel boride powder, an inorganic binder and an organic vehicle, wherein the quantity of the nickel boride powder is within the range of about 5% by weight or more, but less than about 60% by weight of the total paste.

The invention relates to a preparation method of high-strength bamboo shoot shell packing materials and belongs to the technical field of packing material preparation. According to the preparation method, firstly through a molecular sieve dewaxing principle, the surface of a bamboo shoot shell is subjected to dewaxing treatment, molecular sieve powder absorbing bamboo wax, lemon juice and bacterial suspension liquid are mixed for fermentation, then fermentation products and nickel boride are mixed and react in a high-pressure reaction kettle to obtain a reinforced material, and then the reinforcing material, urea resin and starch paste are utilized to prepare an adhesive. Then the surface of the dewaxed bamboo shoot shell is subjected to corona treatment, after the adhesive is applied, hotpressing is conducted, and thus the high-strength bamboo shoot shell packing paper is obtained. According to the preparation method, the surface of the bamboo shoot shell is subjected to corona treatment, corona discharge is utilized, low-temperature plasma is generated, thus free radicals are generated on the surface of the bamboo shoot shell, so that crosslinking occurs, the surface of the bamboo shoot shell is coarsened, the wettability to the modified adhesive is improved, the free radicals generated on the surface of the bamboo shoot shell can generate intermolecular adsorption and hydrogen bond adsorption with active groups in the modified adhesive, and the mechanical strength of a plate is improved.

A method of inhibiting corrosion and stress corrosion cracking of a steam generator tube in a nuclear power plant, includes the steps of providing a nuclear power plant having a secondary side feedwater system including a secondary side feedwater of a steam generator tube; and supplying nickel boride to said secondary side feedwater to inhibit corrosion and stress corrosion cracking.

The invention provides a method for producing high-purity nickel boride, and relates to a method for producing nickel boride, in particular to a method for producing the high-purity nickel boride. The method is to mix 25 to 35 weight portions of simple substance boride, 45 to 55 weight portions of metallic nickel and 5 to 60 weight portions of carbon-containing additive, and carry out electrofusion and smelting on the mixture for 4 to 5 hours at a temperature of between 2,000 and 2,400 DEG C through a vacuum electrical resistance furnace to obtain the high-purity nickel boride. The method has the advantages of low cost and environmental protection. The high-purity nickel boride prepared by the method is stable in quality and not easy to volatilize and oxidize.

The invention relates to a nickel-based catalyst of special hydrogen used for preparing a fuel cell and a preparation method. The nickel-based catalyst is composed of a core layer and a shell layer. The core layer is integrally formed through a base metal material and a nickel boride nanometer wire, and an amorphous phase nickel borate nanometer array is adopted as the shell layer. The preparationmethod comprises the following steps that 1, the nickel boride nanometer wire is prepared; the surface of the base metal material is covered with an aluminum oxide mask plate, the nickel nanometer array is deposited on the nickel piece base in advance through a vacuum evaporation coating method, after depositing is carried out for 25-35 minutes, boron hydride gas is introduced to grow the nickelboride nanometer wire in an epitaxial manner, after boron hydride gas is introduced, depositing is carried out, the base metal material is taken out, and the mask plate is stripped off to obtain the core layer for standby; and 2, the nickel borate-nickel boride hydrogen manufacturing catalyst for the core and shell structure is prepared, protective gas is used for loading boric acid steam to carryout annealing on the core layer to generate the amorphous phase nickel borate nanometer array, and the nickel borate-nickel boride catalyst of the core and shell structure is prepared and obtained.

This invention relates to an inhibitor of lead-induced stress corrosion cracking including nickel boride in the secondary side of steam generator tubes in nuclear power plants and an inhibition method using the same, and more particularly, to an inhibitor of lead-induced stress corrosion cracking, in which nickel boride is added to secondary side cooling water of the steam generator in an amount of 0.2˜6 g / l, and to an inhibition method using the same. According to this invention, when the inhibitor of lead-induced stress corrosion cracking is added to the secondary side of the steam generator tube in nuclear power plants, stress corrosion cracking of the tubes, which occurs in the lead-containing neutral or caustic solution, and a crack growth rate are decreased, thus increasing elongation. Further, a stress corrosion cracking ratio is decreased, and therefore the stress corrosion cracking resistance of metal or alloy can be improved. Therefore, nickel boride can be usefully used as an inhibitor of lead-induced stress corrosion cracking of the steam generator tubes in nuclear power plants.

The invention relates to a C5 / C6 alkane isomerization catalyst loaded with nickel boride as well as a preparation method and an application method thereof. The catalyst comprises a carrier and the nickel boride the weight of which is 1-5% of that of the carrier, wherein the carrier is formed by aluminium oxide and an H beta molecular sieve; the weight ratio of the aluminium oxide to the H beta molecular sieve is (1:9)-(9:1). According to the catalyst provided by the invention, halogen components are not needed to be added, and noble metals are not used, so that the environmental pollution is avoided and the catalyst cost is reduced; besides, the catalyst can be directly used for isomerization process without requiring pre-hydrogenation for reduction. Tests prove that when the catalyst is used for isomerization reaction for catalyzing n-hexane and n-pentane, the activity of the catalyst is higher, and the isoalkane selectivity and the catalyst stability are better.

The invention belongs to the technical field of material preparation and in particular relates to an oxidation-resistant conductive paste composition, a conductive coating and a preparation method thereof. The conductive paste composition comprises, in parts by weight, 75 to 95 parts of boron nickel powder, 5 to 15 parts of boron-containing inorganic binder, 1 to 5 parts of organic vehicle, and 10 to 30 parts of solvent, wherein the boron nickel powder is a conductive metal powder having a surface coated with nickel boride; the boron content in the boron nickel powder is 2 to 8%; the boron content in the boron-containing inorganic binder is 2 to 20%. The conductive paste composition can be sintered under an air atmosphere, has excellent oxidation resistance, can be sintered at about 600 degrees, and has a simple application process and a low energy consumption process. The conductive coating prepared from the conductive paste composition has the characteristics of low cost, good electrical conductivity and good adhesion, and can be widely used in RFID antenna production.

The invention relates to a preparation method of an efficient fruit and vegetable pesticide cleaning agent and belongs to the technical field of preparation of cleaning agents. The preparation methodcomprises the following steps: firstly taking orthosilicic acid as a silicon source, and then, adding alkali and lithium metaaluminate as an aluminum source; synthesizing a silicon-aluminum molecularsieve carrier by utilizing a hydrothermal method, taking nickel boride as a catalyst, and enabling metal ions in the silicon-aluminum molecular sieve to leave original crystal lattices through the chelating property of tartaric acid and then enter an organic phase of the tartaric acid so as to generate holes in the original crystal lattices of the silicon-aluminum molecular sieve to improve the adsorption activity of the molecular sieve; taking tea seeds rich in tea saponins and spirulina rich in polysaccharides as raw materials, performing water extraction and alcohol precipitation to enablethe tea saponins and the spirulina polysaccharides to be separated out and adsorbed and fixed by a high-adsorbability molecular sieve, and then, performing reaction with a cerium nitrate solution to obtain reaction filter residue; then, pulverizing oyster shells, performing calcination, performing reaction with water, and performing filtration to obtain an alkaline calcium ion solution; and finally, blending and concentrating a calcium ion solution and the reaction filter residue to obtain the fruit and vegetable pesticide cleaning agent.

The invention discloses a boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material and a preparation method thereof. The composite material is composed of ultra-thin carbon nanosheets and bamboo-shaped carbon nanotubes. The carbon nanotubes The interior is wrapped with metallic nickel nanoparticles. The method includes: preparing nickel boride through a mild chemical reduction method. Mix nickel boride, dicyandiamide and sodium chloride in proportion and grind them evenly. The mixture is calcined at a high temperature under an inert atmosphere to obtain a black powder material. The method of the invention has simple process and strong repeatability, and the boron / nitrogen double-doped carbon nanotube-carbon nanosheet composite material obtained by one-step cracking has the characteristics of light weight, low density, excellent electromagnetic wave absorption performance, etc. Both have excellent absorption strength and absorption bandwidth.