43results about How to "Uniform chemical reaction" patented technology

At least one of a nucleus forming process, a nucleus growing process, a chemical sensitizing process, and a spectral sensitizing process for producing a silver halide photographic emulsion is performed by using a microreactor. A minute region of the microreactor is used to precisely perform a reaction of nucleus formation. A condition under which host grains are allowed to react with newly supplied silver halide nuclei is made uniform to cause uniform crystal growth. A predetermined quantity of molecules for chemical sensitization is doped in a crystal lattice of a nucleus of silver halide to effect a sensitizing process. Alternatively, a spectral sensitizing process in which a single molecular layer of a spectral sensitizer is uniformly adsorbed on a silver halide nucleus grain surface is securely carried out.

The invention discloses a magnesium-lithium alloy surface treatment device, which aims to make the magnesium-lithium alloy in the process of chemical conversion uniform conversion film, and no corrosion spots appear when tested by a salt spray test. The technical scheme adopted is: comprising: The treatment tank is used for placing the treatment liquid. The bottom of the treatment tank is provided with a number of liquid spray holes. The liquid spray holes are connected to the variable frequency pump through the liquid channel arranged at the bottom of the treatment tank. The variable frequency pump is connected to the treatment liquid source. The control end of the pump is connected to the controller, the side wall of the processing tank is provided with a position sensor, and the position sensor is connected to the controller; when the magnesium-lithium alloy workpiece is processed, the processing liquid is sprayed through the liquid spray hole to make the magnesium-lithium alloy work. The alloy workpiece is suspended in the treatment liquid, and the position sensor detects the position change information of the magnesium-lithium alloy workpiece and feeds it back to the controller. The controller adjusts the outlet pressure of the variable frequency pump according to the position change information, so that the magnesium-lithium alloy workpiece can be stably suspended in the treatment liquid. in liquid.

The invention relates to a preparation method of compound powder with a tubular biochar-coated SnO<2> structure and an application of the compound powder. According to the preparation method, villus plants such as dandelion are subjected to earlier-stage alkali activation treatment at an earlier stage, so that a large quantity of oxygen-containing functional groups similar to hydroxyl and carboxyl exist inside a carbon tube. A microwave-ultraviolet-ultrasound synthetic mode is adopted, so that the adsorption of SnO<2> particles by a carbon framework can be facilitated; the problem of volume expansion of the SnO<2> in charging and discharging processes is effectively solved; and the tubular biochar-coated SnO<2> structure is obtained finally. The preparation method is simple, low in reaction temperature, short in reaction period, simple in process equipment, environmentally friendly and suitable for large-scale production, and does not need subsequent treatment.

Disclosed is a preparation method for a card-shaped NH4V308 micro crystal. Ammonium metavanadate is dissolved in deionized water to prepare an NH4VO3 solution with the concentration of NH4+ being 0.03-0.15mol / L, and then the pH of the solution is regulated to be 3.5-4.5 to obtain a solution B; microwaves and an ultraviolet lamp simultaneously act on the solution B in a microwave and ultraviolet combined mode, the temperature rises to be at 50-90 DEG C and then is kept, and suspension liquid is obtained; centrifugal separation is carried out on the suspension liquid to obtain powdery products, and then the products are dried. The NH4V308 micro crystal prepared in the method is uniform in chemical composition, is high in purity and is shaped like a card, the thickness of the NH4V308 micro crystal is about 200-500nm, and the NH4V308 micro crystal has good electric chemical performance when serving as anode materials for a lithium ion battery. The preparation method for the card-shaped NH4V308 micro crystal is simple, low in reaction temperature, short in reaction period, without subsequent processing, friendly to the environment, and suitable for large-scale production.