40results about How to "Uniform method" patented technology

The speed of the laser scanned by the scanning means such as a galvanometer mirror or a polygon mirror is not constant in the center portion and in the end portion of the scanning width. As a result, the object, for example an amorphous semiconductor film, is irradiated with the excessive energy and therefore there is a risk that the amorphous semiconductor film is peeled. In the present invention, in the case where the laser spot of the energy beam output continuously on the irradiated object is scanned by moving it back and forth with the use of the scanning means or the like, the beam is irradiated to the outside of the element-forming region when the scanning speed of the spot is not the predetermined value, for example when the speed is not constant, and accelerates, decelerates, or is zero, for example in the positions where the scanning direction changes, or where the scanning starts or ends.

The invention discloses a method for preparing chloramphenicol molecularly imprinted polymeric microspheres, and relates to a method for preparing polymeric microspheres. The method solves the problems that a molecularly imprinted polymer obtained by adopting a mass polymerization method has irregular particles and is easy to agglomerate. The method comprises the following steps of: 1, dissolvingmethacrylic acid and chloramphenicol into acetonitrile, adding ethylene glycol dimethacrylate and zaodiisobutyronitrile after the oscillation to obtain a mixture, performing ultrasonic treatment on the mixture, and then sealing the mixture after nitrogen aeration and oxygen removal; 2, performing heating polymerization on the sealed mixture for hours, cooling and centrifugating the mixture, and then naturally drying a precipitate; and 3, removing the chloramphenicol from the precipitate, washing the precipitate with methanol for 5h, and drying the precipitate to obtain the chloramphenicol molecularly imprinted polymeric microspheres. The chloramphenicol molecularly imprinted polymeric microspheres obtained by the method have regular particle shapes, uniform size, and no agglomeration phenomenon, and increase the specific surface area of the chloramphenicol molecularly imprinted polymeric microspheres, thereby improving the adsorptivity.

A method for testing cutting performance of a diamond saw blade, relating to a technical field of diamond tool test, is provided, which solves problems of inaccuracy and non-uniformity existing in conventional methods for testing cutting performance of a diamond tool. The method includes steps of: (1) obtaining a set load parameter value, particularly including steps of: controlling a feed amount of the diamond saw blade; finding out a load value K corresponding to a maximum feed amount of the diamond saw blade on a cutting object; and setting M=0.70K-0.85K, wherein M is the set load parameter value; and (2) during cutting, controlling a cutting load value of the diamond saw blade to be 0.90M-1.1M through a servo system. Therefore, uniform three cutting elements of machine and tool, object, and feed thrust are realized, and the performance of the diamond tool is automatically and accurately measured.

The invention relates to a preparation method for a catalyst to hydrotreat hydrocarbons, which comprises gama- Al2O3 as carrier, metal from VIB group and VIII group as active constituents, and Ti as active adjuvant. The prepraration method comprises: adding titanate solution to bring said Ti during the gelatinization for preparing aluminum hydroxide; adding basic solution contained Mo or W into the dried aluminum hydroxide powder, mixing till the powder wet fully by solution; adding acid solution contained Co or Ni, mixing till plastic, extruding to form, drying, baking, and obtaining the catalyst. This invention improves the catalyst property obviously.

The invention relates to a preparation method and application of three-dimensional polydopamine, and belongs to the technical field of functional materials. According to the preparation method, dopamine hydrochloride and metal iron salt are used as raw materials, and the three-dimensional polydopamine is prepared by utilizing a self-polymerization and self-assembly. The three-dimensional polydopamine prepared by the method has the advantages of simple method, adjustable size and morphology and the like, and the requirement of environmental protection is met by taking a common water / alcohol system as a reaction solvent. The preparation method of the three-dimensional polydopamine material provided by the invention can promote further development of related research of polydopamine. The three-dimensional polydopamine prepared by the method disclosed by the invention has an excellent photo-thermal conversion effect, and compared with traditional optical materials, the material shows excellent biocompatibility and photo-thermal conversion rate, and plays a role in promoting the research of a photo-thermal agent. The three-dimensional polydopamine material prepared by the method can beused for photothermal therapy of tumors, so that the three-dimensional polydopamine material has a good medical application prospect.

The invention provides a preparation method of a wafer-level vanadium dioxide film. The preparation method comprises the following steps of S1, providing a metal vanadium film with uniform growth; andS2, under the condition that the temperature is 450-650 DEG C and oxygen-free, oxidizing the metal vanadium film by using water vapor to obtain a monoclinic phase vanadium dioxide film. The preparation method can be used for preparing the vanadium dioxide thin film with the excellent performance of the wafer level size, is uniform and compact, and can achieve the resistance change of three to four orders of magnitudes in the phase change process. According to the preparation method, the water vapor is used as a mild oxidizing agent, a self-adjusting oxidation mechanism can be realized in thegrowth process when the vanadium dioxide film is prepared, so that a stable positive tetravalent monoclinic phase vanadium dioxide film can be prepared. According to the preparation method, the growthtemperature zone prepared by the vanadium dioxide film is greatly expanded, and the vanadium dioxide film can be efficiently prepared within the range of 450-650 DEG C; and the method is simple and easy to implement and high in repeatability, and the whole film growth process is non-toxic, environment-friendly and low in cost.

The invention provides a homogenized alumina ceramic and a preparation method thereof, which can solve the technical problem that the existing preparation method cannot obtain the homogenized alumina ceramic. Wherein, the preparation method of homogenized alumina ceramics includes: preparing mixed slurry: sequentially mixing silica sol, water-soluble macromolecular organic matter and alumina ceramic powder in a certain mass ratio to obtain a mixed slurry; preparing homogeneous oxidation Aluminum ceramics, comprising: injecting the mixed slurry into a mold and controlling the mold to rapidly suspend in a liquid nitrogen environment to solidify the mixed slurry to obtain a green body; demolding the green body and performing The homogeneous alumina ceramic is obtained after treatment.

The invention discloses a manufacturing method of a screen printed plate of an edge sealing frame of a liquid-crystal display, comprising the following steps: designing the patterns of the whole screen printed plate as rectangular patterns which are matched with a glass substrate to be processed; arranging a rectangular layout area for multiple patterns of the edge sealing frame on the middle parts of the rectangular patterns in a row and column form; and respectively arranging U-shaped auxiliary lines of which the opening face outwards on the two ends of the patterns of the edge sealing frame in each row and each column, wherein the U-shaped auxiliary lines are located between the outer edge of the rectangular layout area and the outer edges of the patterns of the whole screen printed plate, the whole width of each U-shaped auxiliary line is the same as the widths of the patterns of the edge sealing frames in corresponding rows or corresponding columns, and the widths of the lines of the U-shaped auxiliary line is the same as the widths of the lines of the patterns of the edge sealing frame. According to the method, the U-shaped auxiliary lines are arranged at the four sides of the layout area, the U-shaped auxiliary lines are similar to the local shapes of the patterns of the edge sealing frame, and the density of the U-shaped auxiliary lines is the same, so that the influence of the thickness uniformity of the boxes caused by edge effect is maximally eliminated, the rainbow problem caused by the influence is solved, and the quality of the product is improved.

The present invention relates to the technical field of nanomaterial preparation, in particular to a microwave-assisted method for preparing Au nanoflowers and Au nanoflowers, comprising the following steps: step 1, adding a certain concentration of HAuCl into a round bottom flask 4 solution, followed by adding octadecylamine, KBr and PVP to form a mixed solution a; step 2, adding the reducing agent tetraethylene glycol (TEG) to the mixed solution a, mixing and stirring to obtain a mixed solution b; step 3, mixing the mixed solution b placed in a microwave reactor to heat the reaction; Step 4, the product of Step 3 is treated with acetone to obtain Au nanoflowers. The invention adopts a microwave-assisted method, the method is novel, and Au nanoflowers with single appearance, good dispersion and uniform size are prepared.

The invention discloses a PICC (peripherally inserted central catheter) intelligent control operation instrument for chemotherapy on leukemia patients, and belongs to the technical field of medical apparatus and instruments. The PICC intelligent control operation instrument comprises a movable operation device, an automatic puncture device, a positioning and navigation device, a main control monitoring device and an auxiliary fixing device. The movable operation device comprises a base desk, a first mechanical arm, a second mechanical arm and a third mechanical arm, the automatic puncture device comprises a first electric telescopic rod, an angle controller, a puncture support plate, a cannula sheath clamp head, a needle clamp head and a catheter clamp head, the positioning and navigation device comprises a connector, a positioning and navigation mechanism, a second electric telescopic rod and an ultrasonic probe, the main control monitoring device comprises a hose, a display screen, a control desk, an ultrasonic generator, an electrocardiogram instrument and an EKG (electrocardiogram) positioning assembly, and the auxiliary fixing device comprises an automatic pulse pressure device, a base plate and a grip strength fixing mechanism. The PICC intelligent control operation instrument has the advantages of simplicity and convenience in use, speediness and high accuracy.