7results about How to "Few preparation steps" patented technology

The application discloses a device and method for bending and deforming micro-nano samples in-situ in an electron microscope, and belongs to the field of scanning / transmission electron microscope accessories and micro-nano material mechanical property measurement research. The device comprises four parts, namely a supporting part, a driving part, a bending loading part and a sample stage part. One end of the nano material is fixed to a suspended part at the front end of the sample stage, and the other end is a free end. The free end of the nano material is pushed by the bending loading part driven by the heating and bending bimetallic strip, so that the nano material achieves the bending and deformation effect. The application separates and fixes the bimetallic strip and the sample, solves the problems of poor mechanical stability and easy movement of the sample in the deformation process of the in-situ bending nano material, improves the stability of the fixed sample and in-situ imaging, realizes the bending and deformation of the sample, and simultaneously observes the structural evolution of the material in the deformation process. While realizing the bending and deformation of single / multiple nano wire shafts, the structural evolution of the material in the deformation process is observed in-situ.

The invention relates to the technical field of microalgae content detection, in particular to portable microalgae content detection equipment, and solves the problem that the detection efficiency of the equipment is further delayed due to the fact that the detection method is relatively complicated and the pre-preparation step of the detection operation takes relatively long time when large-scale detection operation is carried out. Comprising a handheld cuvette detector body, and a convenient rotary detection mechanism is mounted on the lower end face of the handheld cuvette detector body. According to the invention, a plurality of cuvettes can be sequentially moved to a position between two optical detection assemblies for detection operation through the convenient rotation detection mechanism, the cuvettes can be firstly rotated through the microalgae mixing vortex-eliminating colorimetric detection mechanism to uniformly mix a microalgae-containing to-be-detected liquid, and then the flowing of the microalgae-containing to-be-detected liquid is forcibly cut off, so that the resting speed of the microalgae-containing to-be-detected liquid is accelerated, and the detection efficiency is improved. According to the technical scheme, the steps of detecting a large batch of microalgae-containing liquid to be detected by the equipment are reduced, and meanwhile, the detection efficiency of the equipment is improved.

This invention discloses a perovskite thin film, a perovskite device, and a preparation method thereof. The preparation method of the perovskite thin film includes: coating a perovskite precursor solution onto a substrate to form a liquid film; removing at least a portion of the solvent from the liquid film using a vacuum process to form an intermediate phase film; and performing an annealing treatment to form the perovskite thin film; wherein the perovskite precursor solution contains an excess of A-site cations. The preparation method provided by this invention effectively compensates for the loss of A-site cations during the vacuum process, inhibits the formation of residual B-site cation salts, reduces device voltage loss, increases the grain size of the perovskite thin film, improves carrier transport and extraction, and increases the short-circuit current of the device; it is simple and easy to implement, low in cost, and requires no additional steps, making it suitable for the preparation of large-area perovskite thin films; it reduces the number of steps in perovskite device preparation, lowers material costs, and facilitates industrial development.

This application discloses a welding fixture for small-diameter flanges, belonging to the technical field of small-diameter flanges. It mainly includes a drive cylinder with an output shaft; an adjusting plate; a sliding groove formed on the adjusting plate, in which a slider is slidably connected, connected to the output shaft, and the drive cylinder used to drive the slider to move laterally; a locking mechanism comprising: two sets of circularly opposed arc plates rotatably connected to the slider, with a chuck mounted at the other end of the two sets of arc plates, the lateral movement of the slider suitable for moving the two sets of arc plates and the chuck; a support plate rotatably connected to one side of the adjusting plate, with baffles mounted on both the upper and lower sides of the support plate; and a support mechanism for supporting the connecting pipe. The locking mechanism and the support mechanism are coaxially arranged. This small-diameter flange welding fixture reduces pre-welding preparation steps, ensures coaxial arrangement of the pipe diameter and flange, prevents flange misalignment, and enables rapid batch processing.

Single-phase full-bridge intelligent power module based on gallium nitride power chip and manufacturing method, including ceramic substrate, power chip, drive chip, power copper surface, decoupling capacitor, printed circuit board and shell; a plurality of power copper surfaces are arranged on the ceramic substrate, gaps are left between adjacent power copper surfaces, the decoupling capacitor and the power chip are arranged on the power copper surface; the printed circuit board is covered on the ceramic substrate, and a plurality of drive chips are arranged on the printed circuit board; the ceramic substrate, the power chip, the drive chip, the power copper surface, the decoupling capacitor and the printed circuit board are arranged in the shell. The processing flow designed by the application is easy to realize the automation of power module processing and preparation, effectively reduces the preparation steps of the power module, improves the yield of the power module preparation, and the raw material cost of processing and use is low, effectively controls the production cost of the power module. At the same time, the preparation process can guarantee the electrical insulation performance and the reliability of the electrical bonding connection in the power module.

The application discloses a display panel and a display device. The display panel comprises a substrate, a pixel layer arranged on one side of the substrate, the pixel layer comprising a plurality of pixel units, each pixel unit comprising at least two sub-pixels with different colors; a color resistance layer comprising at least two layers of sub-color resistance layers with different colors, each sub-color resistance layer comprising a light transmission opening and a color resistance part distributed around the light transmission opening, the color resistance part comprising a light filtering sub-part and a functional sub-part arranged around the light filtering sub-part, the light filtering sub-part being located on the side of the sub-pixel with the same color as itself away from the substrate, the functional sub-parts of the at least two layers of sub-color resistance layers with different colors being stacked to form a light blocking structure, in the two adjacent sub-color resistance layers, the light filtering sub-part of the sub-color resistance layer away from the substrate is located in the light transmission opening of the sub-color resistance layer close to the substrate, and the refractive index of the sub-color resistance layer on the side close to the substrate is smaller than that of the sub-color resistance layer away from the substrate.

The invention relates to the technical field of copper powder preparation, and provides a liquid-phase preparation method of non-pressure crystallized superfine copper powder, which adopts a water-phase reduction process, and realizes stable control of crystallization proportion and particle size distribution of superfine spheroidal copper powder by accurately regulating and controlling a reducing agent, a complexing agent, a crystallization modifier and reaction conditions. The problems of harsh reaction conditions, high energy consumption, high toxicity and the like of a traditional high-temperature method are solved; the obtained copper powder is uniform and stable, is suitable for the fields of precision electronics, specific catalysis and the like, flexibly adapts to downstream requirements by adjusting the sintering temperature within the range of 250-350 DEG C, and meets the application of flexible electronics, power chip interconnection and the like. The process is simplified in steps, environment-friendly and safe, the production cost is greatly reduced, the production efficiency is improved, and large-scale industrial production is facilitated.