33results about How to "Hypoxic" patented technology

The invention discloses a preparation method of tungsten-copper-cobalt alloy powder. The invention selects atomized copper powder and crystalline tungsten powder as raw materials, adds carbonyl cobalt powder into the atomized copper powder and crystalline tungsten powder, and places them in a steel strip reduction furnace. In the process, high-temperature diffusion treatment is carried out under protective gas or reducing atmosphere, through the diffusion of cobalt carbonyl powder in atomized copper powder and crystalline tungsten powder, the atomized copper powder and crystalline tungsten powder are connected by alloy, and then crushed by a crusher Sieve to obtain tungsten-copper-cobalt alloy powder. The tungsten-copper-cobalt alloy powder prepared by the preparation method of the present invention has uniform composition, high density, excellent fluidity and is easy to form, solves the problem of easy segregation in the traditional preparation method, and has a simple preparation process and is easy to operate.

The invention discloses a preparation method of tungsten-copper-tin alloy powder. The invention selects atomized copper powder and crystalline tungsten powder as raw materials, adds tin powder into the atomized copper powder and crystalline tungsten powder, and places them in a steel strip reduction furnace. , high-temperature diffusion treatment is carried out under protective gas or reducing atmosphere, through the diffusion of tin powder in atomized copper powder and crystalline tungsten powder, the atomized copper powder and crystalline tungsten powder are connected by alloy, and then crushed and screened by the crusher Obtain tungsten-copper-tin alloy powder. The tungsten-copper-tin alloy powder prepared by the preparation method of the present invention has uniform composition, high density, excellent fluidity and is easy to form, solves the problem of easy segregation in the traditional preparation method, and has simple preparation process and easy operation.

The invention belongs to lithium battery materials, and specifically relates to a method for preparing a lithium titanate material, comprising the following steps: step 1, adding tetrabutyl titanate into absolute ethanol and stirring evenly to form a titanium alcohol solution; step 2, adding acetic acid Lithium is added to the titanic acid solution and stirred evenly to form a mixed solution; step 3, the titanium monoxide powder is added to the mixed solution by low-temperature ultrasound for 1-2 h to obtain a suspension; step 4, the suspension is sprayed to the constant temperature reaction kettle In the process, the coated titanium monoxide particles are obtained after sealing deposition and pressure relief cooling; step 5, the coated titanium monoxide particles are placed in the sealed reaction kettle for 1-3 hours under constant pressure, and then water vapor is introduced to carry out the sealed and pressurized reaction 2- 3h, after the pressure was released, it was sealed and sintered to obtain lithium titanate particles. The invention solves the problem of poor electrical conductivity of the existing lithium titanate material, uses titanium monoxide as the inner core, and uses lithium titanate as the surface coating layer to ensure that the prepared material has oxygen deficiency, improves the mobility of electrons, and thus improves the the conductivity.

The invention relates to a positive pole coating for an ion membrane electrolysis bath. The positive pole coating is characterized by comprising, in weight percent, 35-45mol% of ruthenium, 5-15mol% ofiridium, 5-10mol% of platinum, 35-45mol% of titanium and smaller than 4%mol% of other additives. The additives comprise zirconium chloride or palladium chloride. The positive pole coating for the ionmembrane electrolysis bath is used for an active anode, an oxygen evolution potential is high, catalytic ability is high, conductivity is high, oxygen evolution side reaction cannot be easily generated, the coat is stable in performance, resistant to corrosion, long in service life, coating can continue to be used after recoating after an electrode is faulted, electrodes is effectively controlled, product quality is improved, and required chlorine purity is high, and oxygen content is low.

The invention discloses a medical three-dimensional printing alloy material and a preparation method thereof. The medical alloy components and their mass percentages for three-dimensional printing are: 6~12wt.%Fe, 1~11wt.%Zn, 0.5~4wt. %Y, 0.01~0.07wt.%Cu, 0.5~3 wt.%Ca, 0.1~2.5wt.%Mn, 0.1~1wt.%Zr, and the balance is Mg. The preparation method is as follows: after designing the composition, the raw materials are made into spherical powder, and the metal powder is fully mixed, the mixed raw material powder is sintered and solid solution heat treated, and then the light alloy spherical powder is obtained through mechanical grinding and alloying. The invention is a multi-component degradable alloy material composed of human nutritional elements with complete biological safety, and has excellent flame retardancy, powder shape and particle size are easy to control, and can be used in the field of medical degradable implant materials and three-dimensional printing All have important application potential and good application prospects.

The invention discloses a high-plastic light alloy for three-dimensional printing and a preparation method thereof. The mass percentages of the components of the alloy are: 1-8wt.%Zn, 1-7wt.%Er, 0.2-5wt.%Nd, 0.2~2wt.%Mn, 0.1~1wt.%Zr, the balance is Mg and unavoidable impurities. The preparation method is as follows: after designing the composition, the raw materials are made into spherical powder, and the metal powder is fully mixed, the mixed raw material powder is sintered and solid solution heat treated, and then the light alloy spherical powder is obtained through mechanical grinding and alloying. The finished product obtained by three-dimensional printing has the advantages of high plasticity, light weight, good heat resistance and wear resistance under the premise of maintaining high strength.

The invention discloses a preparation method of tungsten-copper-nickel alloy powder. The invention selects atomized copper powder and crystalline tungsten powder as raw materials, adds carbonyl nickel powder into the atomized copper powder and crystalline tungsten powder, and places it in a steel strip reduction furnace. In the process, high-temperature diffusion treatment is carried out under protective gas or reducing atmosphere, and the atomized copper powder and crystalline tungsten powder are connected by alloy through the diffusion of carbonyl nickel powder in atomized copper powder and crystalline tungsten powder, and then crushed by a crusher Sieve to obtain tungsten-copper-nickel alloy powder. The tungsten-copper-nickel alloy powder prepared by the preparation method of the invention has uniform composition, high density, excellent fluidity and is easy to form, solves the problem of easy segregation in the traditional preparation method, and has simple preparation process and easy operation.

The invention relates to novel preparation technology for a mixture taking water as a grinding medium. The novel preparation technology contains working procedures such as batching, wet grinding, unloading, slurry drying and the like, wherein in the working procedure of the wet grinding, distilled water is adopted as the grinding medium, and 2 to 3 percent of antioxidant substance is added into the distilled water; in the working procedure of unloading, the mixture is unloaded from a wet grinder and passes through a 320-mesh sieve, and the wet grinder is washed for 6 times by water; and in the working procedure of slurry drying, an open type spray drying tower is adopted for drying, slurry is output to a nozzle for atomization by a pump, fog drops move from the bottom up, encounter the hot air which moves from the top down, and then are dried and a material flows out of the tower and is loaded into a material barrel after the automatic cooling. The preparation technology can effectively eliminate potential safety hazard, and save a large amount of energy sources; and the preparation technology does not need fire prevention and explosion prevention, adopts open type spray drying equipment, saves one half of equipment investment, does not need chilled water and nitrogen, and greatly reduces the cost for production operation.

The invention discloses a preparing method, material and application of a medical magnesium alloy material used for 3D printing. The magnesium alloy material comprises, by mass, 10-16wt% of Fe, 1-3wt% of Mn, 0.2-2wt% of Zn, 0.5-3wt% of Ca and the balance Mg. According to the preparing steps, the material is prepared according to the compositions and the mass; pure magnesium, pure manganese, pure zinc and pure calcium are put into a preheated crucible, a covering agent is added, and the mixed material is smelted on the atmosphere condition; after the mixed material is smelted, a magnesium iron intermediate alloy is added, after the mixed material is smelted, the mixed material is stirred uniformly, and the temperature is stabilized to range from 700 DEG C to 740 DEG C; a refining agent is added, refining is carried out for 5-30 min, the material stands for 10-30 min at the temperature of 700 DEG C-740 DEG C, surface dross is skimmed, the material is poured into a metal mould, and medical magnesium alloy base metal is obtained; and the base metal is smelted and atomized, and the medical magnesium alloy material is obtained. The medical magnesium alloy material is a multi-element degradable alloy material completely composed of biosecurity human body nutrient elements, has an excellent flame retardant property, can degrade an inner implanted material medically, has an important application potential in the 3D printing field, and has a good application prospect, and the powder shape and the particle diameter are easy to control.