56results about How to "Eliminate reunion" patented technology

The invention relates to a zinc-aluminum oxide powder doped with lanthanum or yttrium and a co-precipitation-supercritical fluid drying preparation method. After the precipitate synthesized by liquid-phase co-precipitation is washed with deionized water and ethanol, it is washed with ethanol solvent under supercritical conditions. No shrinkage drying under the characteristics of no obvious liquid-gas interface, which combines the advantages of both, eliminates or reduces the agglomeration between zinc-aluminum composite oxide nanopowders, and realizes doping, Al 2 o 3 The mass ratio to ZnO is 3:97. High powder output ratio, simple method, easy control of product particle size, and low cost. The prepared powder has a hexagonal wurtzite crystal structure, small agglomeration among powders, good dispersion, particle size less than 100nm, and dense fine-grained structure. The invention solves the problem of powder agglomeration, can be sintered into various shapes, and has excellent photoelectric performance as a target material. Using magnetron sputtering, vacuum evaporation and other methods to prepare transparent electrodes for flat display devices such as liquid crystal and plasma, and solar cells on the substrate.

The present invention relates to the production process of calcium carbonate, and especially one ultrasonic cavitation process of producing nano calcium carbonate. The present invention solves the problem of slow mass transferring rate among gas, liquid and solid phases. The production process includes calcining limestone in a vertical kiln to obtain CaO and CO2, hydration of CaO in a digestor to obtain Ca(OH)2, carbonation of Ca(OH)2 emulsion with kiln gas CO2 in a reactor to obtain superfine CaCO3, the CaCO3 slurry is spray dried to obtain superfine calcium arbonate powder, and the ultrasonic cavitation treatment during hydration, preparing slurry and carbonation in separate ultrasonic crusher. Each ultrasonic crusher has power of 6100-7000 w, frequency of 15-19 KHz and 8-16 emitters provided.

A nano gallium nitride spherical powder preparation method is characterized by including the following steps: putting a gallium oxide powder into a microwave heating device full of ammonia gas, and carrying out a reaction, to obtain a gallium nitride powder; and then carrying out ball-milling crushing of the gallium nitride powder, carrying out sieving treatment, and then carrying out induction plasma treatment to obtain the nano gallium nitride spherical powder. Compared with the prior art, the two-step method is adopted for preparation of the high-quality nano gallium nitride spherical powder, that is to say, the primary gallium nitride powder is prepared by the microwave solid-phase synthesis method firstly and then is further deeply processed through the induction plasma method; therefore, the purity of the gallium nitride powder can be improved, the powder can be nanocrystallized, and the gallium nitride powder with good dispersibility and high quality is obtained.

The present invention provides a silicon carbon negative electrode material slurry and a preparation method thereof, comprising the following steps: 1) dividing the CMC glue into two parts, and mixing the first part of the CMC glue, a conductive agent and a silicon carbon material to obtain a slurry 1 2) Add graphite material to slurry 1, and disperse to obtain slurry 2; 3) Add second part of CMC glue and water to slurry 2, vacuumize, and disperse to obtain slurry 3; 4) To slurry 3 SBR binder is added to the medium, and after dispersion, the slurry is sieved to remove air bubbles to obtain a silicon carbon negative electrode material slurry. Eliminate the agglomeration of silicon carbon particles during the pulping process, ensure that the graphite material is evenly wrapped around the silicon carbon particles, and improve the overall cycle life of the battery.