32results about How to "Diffusion does not occur" patented technology

Provided is a method for producing an R-T-B-based sintered magnet by diffusing an heavy rare earth element RH from the surface of an R-T-B-based sintered magnet body into the inside of the sintered magnet body with high efficiency. This method for producing an R-T-B-based sintered magnet comprises: a step of preparing an R-T-B-based sintered magnet body (wherein R represents a rare earth element; and T represents a transition metal element mainly comprising Fe); a step of preparing an RH diffusion source that is an alloy comprising 0.2 to 18 mass% inclusive of a light rare earth element RL (which comprises Nd and / or Pr), 40 to 70 mass% inclusive of Fe and a reminder made up by a heavy rare earth element RH (which comprises Dy and / or Tb) wherein the ratio of the heavy rare earth element RH to Fe (i.e., RH:Fe) is 3:2 to 3:7 by mass; and an RH diffusion step of introducing the R-T-B-based sintered magnet body and the RH diffusion source into a treatment chamber in a relatively movable and approachable or contactable manner to each other and heating the R-T-B-based sintered magnet body and the RH diffusion source at a temperature of 700 to 1000ºC inclusive while moving the R-T-B-based sintered magnet body and the RH diffusion source in the treatment chamber continuously or intermittently.

The invention relates to soil corrosion field, specifically to a device for studying soil corrosion, aiming to solve the problems of the prior art, including less function, high dependence of external environment and high error generation liability. The device comprises two test tanks connected with each other through a latex tube provided with a ion conduction passage formed by saturated KCI gelcontaining 2-3% agar; and the test tank is composed of a PVC tube and a PVC plate disposed at the bottom of the PVC tube and filled with soil medium, and an auxiliary electrode with respect to the working face and a study electrode are disposed in upper part and lower part of the soil medium. The invention uses two independent test tanks communicated by the ion conduction passage in the latex tube, and can simulate different consolidation degree of soil. The soil may not be contacted with each other, so as to prevent diffusive penetration of water and salt. The inventive device has the advantages of reliable measurement results and low error; and can be used for studying soil corrosion, measuring soil resistivity and calculating the volume density and air rate of the test soil.

The invention discloses a compound for rapid detection of malachite green by direct-reading color development and its application, belonging to the fields of food detection and analysis and environmental monitoring. The preparation method of the complex comprises: (1) preparing a titanium alkoxide solution; (2) utilizing suction filtration to make the filter membrane saturated to absorb the titanium alkoxide solution; (3) preparing a potassium iodate-colloidal silver mixed solution; (4) Using suction filtration, the potassium iodate-colloidal silver mixed solution is passed through the filter membrane of the saturated adsorption titanium alkoxide solution prepared in step (2), and the one-step sol-gel reaction generates potassium iodate-Ag / nano-titanium dioxide composite. The present invention uses potassium iodate-Ag / nano-titanium dioxide composite as a color developing agent to detect malachite green in aquatic products or environmental water bodies. The present invention uses potassium iodate / Ag@nano-titanium dioxide composite as a color developing agent to provide a good color developing base material to ensure the stability of color development; while the sensitivity of color development is improved, the time used for color development is also greatly improved reduce.

The invention relates to a semiconductor device and a manufacture method thereof, and an electronic device. A substrate at the two sides of a grid structure is etched before a SiGe shielding layer is formed to form recesses at the two sides of the grid structure, the SiGe shielding layer is deposited after the recesses are formed, the SiGe shielding layer uses CVD SiN with a good gap filling capability so that the CVD SiN can be deposited in the sidewall of a groove and partially fill the groove, a gap wall can be formed in the sidewall of the groove in the subsequent etching process of the SiGe shielding layer, the gap wall in the sidewall of the groove can be protected by a main gap wall in subsequent steps, and NiSi is prevented from damage in the cleaning process.

The invention discloses an array substrate and a preparation method therefor. The preparation method comprises the steps: forming a data line, a graphene source electrode and a grid insulating layer on the array substrate; forming a scanning line and a grid electrode on the grid insulating layer; forming a passivation layer on the data line, the scanning line and the grid electrode, and carrying out the ion implantation for the graphene source electrode, so as to convert a part of the graphene source electrode into a semiconductor active layer; respectively forming a drain electrode and an ITO pixel electrode on the semiconductor active layer. Through the above mode, the method employs the graphene for the preparation of the graphene source electrode and the semiconductor active layer, can make the most of the high conductivity of graphene, and improves the conduction efficiency of the array substrate.

The invention provides a reaction system for strengthening a shoe print trace and a display method thereof. The reaction system contains staining liquid and flushing liquid; the staining liquid is a Hungarian red ethanol solution; and the flushing liquid is anhydrous ethanol. The display method sequentially comprises the steps of staining and flushing. The reaction system and the display method thereof have obvious effect on strengthening the shoe print trace, are safe and nontoxic for a human body, are convenient for use and can be suitable for the complex and fickle field.

The invention relates to a method for treating harmful aerosol in a relatively sealed space, which comprises: (a) forming a fresh air supply opening in a side wall which forms the relatively sealed space, and charging fresh air into the relatively sealed space from the fresh air supply opening; (b), arranging an air flow processing unit on the side, opposite to the fresh air supply opening, of the relatively sealed space, wherein the air flow processing unit comprises a sealed tank box arranged on the side wall of the relatively sealed space and a filtering and sterilizing device and a fan which are arranged in the seal tank body in turn along the flowing direction of the air flow, and the sealed box body is provided with an air outlet channel; and (c) controlling the ratio of the inlet air volume at the fresh air supply opening to the air outlet volume discharged from the air outlet channel to generate an oriented air flow flowing from the fresh air supply opening side to the air flow processing unit in the relatively sealed space, wherein the oriented air flow is discharged into the atmosphere from the air outlet channel after passing through the air flow processing unit. The method of the invention can effectively avoid the diffusion of the aerosol and has better treatment effect and low cost.

The invention relates to anti-counterfeiting stamp-pad ink and a preparation method thereof. The invention aims at providing environmentally-friendly anti-counterfeiting stamp-pad ink suitable for long-term use for anti-counterfeiting, which has good weather fastness and corrosion resistance and a preparation method thereof. The anti-counterfeiting stamp-pad ink comprises solvents, resin and an anti-counterfeiting material. The preparation method comprises the following steps: uniformly mixing and stirring the solvents to obtain a mixed solvent; adding 1 / 2 mixed solvent into a reaction kettle, heating, maintaining a constant temperature, adding the resin, continuing to stir after the resin is completely dissolved, cooling the mixture to the room temperature to obtain a resin solution; uniformly mixing a part of resin solution with the mixed solvent, adding the anti-counterfeiting material, pigment or dope in the mixed solution, and injecting the mixture into a grinding machine for grinding to obtain color sizing; and adding the rest resin solution, the rest mixed solution and other additives into the color sizing, stirring and standing to obtain a product. The product prepared by the invention can be printed on various materials, the formed film is uniform, unlikely to drop, excellent in acid and alkali resistance and weather fastness and short in drying time, thereby being suitable for long-term anti-counterfeiting, particularly suitable for anti-counterfeiting of precious painting.