33results about How to "Continuously adjustable size" patented technology

The invention relates to a silicon oxide sphere particle, in particular to a method for preparing a hollow nano silicon oxide sphere. In a bionic system with room temperature approximately neutral, the three block copolymer F1127 is taken as a structure guiding agent, the mutual interactions between hydrolytic oil-soluble silica resources and the three block copolymer F1127 and inorganic electrolytes are controlled, the hollow spherical particle is obtained by steps of the preparation of polymer micelle, hydrolytic polymerization of silica resources, hydrothermal crystallization, drying and extraction of the structure guiding agent; the size of the spherical particle is continuously adjusted in the range of between 10 and 20nm, and the thickness of a shell wall is continuously adjusted inthe range of between 4 and 10nm. The synthesized nano hollow sphere has the advantages of big specific surface, big hole capacity, uniform particle size and good dispersibility of the particle, a multi-level structure formed between nano hollow spheres and high mechanical stability and thermal stability, etc.

The invention discloses a method for achieving cross-scale photolithography or multi-resolution imaging through change of a beam expansion ratio. A beam expanding mirror in a single-beam spot scanningphotolithography or imaging system is replaced with an electric adjustable magnification beam expanding mirror, and then according to a relevant calculation formula, continuous adjustability of the diameters of focal spots is achieved through adjustment of the beam expansion ratio. According to the method, the spots with the continuously adjustable diameters can be provided in the single-beam spot scanning photolithography or imaging system, and the cross-scale photolithography or multi-resolution optical imaging can be achieved rapidly, simply and conveniently.

The invention relates to an all-inorganic perovskite nanosheet and its preparation method and application. The preparation method adopts a precursor solution with cesium added at room temperature, uses an organic solvent as a solvent and a surfactant, and in an inert gas atmosphere, with a certain The heating rate is gradually raised to the set temperature, then rapidly cooled in an ice-water bath, and the all-inorganic CsPbBr is obtained through repeated centrifugation, redispersion, and washing processes. 3 perovskite nanosheets and apply the material to blue LED devices. The present invention controls the reaction kinetics by adjusting the reaction temperature and reaction time, and obtains highly efficient all-inorganic CsPbBr with a thickness of one to five atomic layers. 3 The perovskite nanosheet has a luminous range of 440nm to 470nm, and the invention realizes its application on blue LED devices and has a good application prospect.

The invention provides a method for preparing a porous polyethylene film, using polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer as a pore-forming agent, and the pore-forming agent serves as a microporous structure-guiding The template is added to the polyethylene, the mixed material is mixed and melted at high temperature, and then pressed into a tablet, and then the film is cooled and the polyethylene oxide-polypropylene oxide-polyethylene oxide triembedding in the film is removed Segment copolymer, and then use a biaxial stretching machine to expand the pores, and obtain a porous polyethylene film with a non-through porous structure after heat setting. The present invention controls the size of the prepared porous film by adjusting the amount of pore-forming agent; on the other hand, stretches the film, and realizes the preparation of the prepared porous polyethylene film by controlling the stretching temperature, tensile strength and other conditions. Continuous adjustment of hole size. In addition, the preparation method provided by the invention has a simple process, is environmentally friendly and is suitable for industrial production.

The invention discloses an inverter control circuit with constant pulse width output and its operating mode, which are used to realize the unipolar operation of the inverter. The inverter control circuit is composed of eight parts: a sampling module, an inverter, a microprocessor dsPIC, a reference voltage generating module, a summing and integrating module, a comparing and exclusive OR module, a monostable trigger and a driving circuit. Under the control of the circuit, the output pulse width of the inverter is constant, which is equal to the transient state maintenance time of the monostable trigger. The time of each cycle is controlled by the reference voltage, the sum and integral module and the comparison XOR module, and the output voltage is equal to the reference voltage in one cycle. The control circuit has the advantages of good input voltage adjustment, strong robustness, strong ability to suppress load changes, and simple control. It does not require an accurate mathematical model. The magnitude and frequency of the inverter output voltage are continuously adjustable, and the output sinusoidal voltage High precision.

The invention discloses anatase titanium dioxide nano-rods and a preparation method thereof. According to the invention, titanium alkoxide is adopted as a titanium source, an organic alkali is adopted as a glue solution, ethylene glycol-water or ethylene glycol-water-ethanol is adopted as a solvent; low-temperature glue solution is carried out, and then high-temperature hydrothermal reaction is carried out; and crystal growth is controlled in a manner of oriented bonding, such that the morphology of a final product is controlled in a special nano-rod shape. The oriented bonding direction is a (001) direction, and a crystal exposed surface is a {101} surface. With different reaction conditions, the diameters of the nano-rods are adjustable within a range of 5-60nm, and the lengths of the nano-rods are adjustable within a range of 50-400nm. According to the nano-rod growth process, a plurality of anatase grains are subjected to local bonding fusion according to a certain optimized direction through crystal lattice match sharing common crystal surfaces, such that the nano-rods with certain length-to-diameter ratio, good dispersion, and huge specific surface area is formed. With an electrode material prepared by using the nano-rods, higher electron collection efficiency can be easily obtained, and high photoelectric performance is provided.

The invention relates to a sulfonic acid polystyrene-silicon oxide hybrid solid acid catalyst and a preparation method. Specifically, it is a sulfonic acid functionalized polystyrene-silicon oxide composite nano hollow sphere, which consists of sulfonic acid polystyrene and silicon oxide [polystyrene: silicon oxide is = (5-50wt%): (50- 95wt%)]; has a hollow spherical shape; the acid content is between 0.5-3.0mmol / g H+, the specific surface area is 50-600m2 / g, and the pore volume is 0.1-0.4cm3 / g. The specific preparation steps are as follows: under alkaline system, cationic surfactant is used as structure directing agent, polystyrene is used as co-template agent, sodium silicate (Na2SiO3) or orthomethyl silicate (TMOS) or orthosilicate Ethyl ester (TEOS) was used as the source of inorganic silicon. After stirring, filtering and drying, polystyrene-silica nano hollow spheres were obtained. The obtained polystyrene-silicon oxide nano hollow spheres are reacted with a sulfonating agent, filtered, and dried to finally obtain a sulfonic acid polystyrene-silicon oxide hybrid solid acid catalyst. The method has few steps and takes a short time.

The invention relates to an ultrasonic vibration cutting work head. The ultrasonic vibration cutting work head is compounded on a numerical control milling and drilling machine, and the work head mainly comprises a blade, a blade fixture, a variable-amplitude pole and an energy converter. The blade is connected with the variable-amplitude pole through the blade fixture, the blade fixture is connected with the variable-amplitude pole in a threaded mode, so that the situation that the central line of the blade is coincident with the central line of the variable-amplitude pole is ensured. A shaft shoulder upper press plate and a shaft shoulder lower press plate are connected on the outer shaft shoulder of the amplitude-change pole in a sleeving mode, and the shaft shoulder upper press plate is fixedly connected with the shaft shoulder lower press plate through a bolt. The shaft shoulder lower press plate is fixed on a suspended beam through a bolt. The variable-amplitude pole is connected with the bottom of the energy converter, an energy converter press plate is tightly and fixedly arranged on the upper portion of the energy converter, and the energy converter press plate is fixed on the suspended beam through a bolt. The suspended beam is fixedly connected with a connecting block on a first flange through a bolt, and the first flange is connected with a second flange through a plurality of supporting blocks. By adoption of the ultrasonic vibration cutting work head, the ultrasonic vibration cutting machining is achieved, and the work head is convenient to design, easy to machine and assemble and disassemble.

The invention discloses a vortex beam generation device, system and method with an adjustable topological number. The vortex beam generation device with an adjustable topological number includes two helical phase mirrors, and the phases of the two helical phase mirrors are respectively set is Aθ 2 and ‑Aθ 2 , two helical phase mirrors are arranged on the optical path in turn, and the topological number of the vortex beam obtained by increasing the angle difference between the two helical phase mirrors increases by 1. After the laser beam is located in this device, it can be added with a helical phase factor to achieve phase modulation, so that the energy distribution of the laser beam becomes a circular distribution, and the angle difference between the two helical phase mirrors can be controlled by rotating one or two helical phase mirrors. The topological number of the resulting vortex beam is tuned, resulting in a ring-shaped spot with tunable size. In the present invention, a group of spiral phase mirrors with a second-order nonlinear spiral structure are designed to superimpose and generate a vortex beam with an adjustable topological number, forming an annular spot with energy distribution concentrated on the edge, a larger diameter, a longer focal depth, and an adjustable size. .

The invention provides a solar simulator for a solar photo-thermal power generation experiment, and belongs to the technical field of detecting equipment for solar photo-thermal power generation devices. The solar simulator is used for the solar photo-thermal power generation experiment, and is characterized in that a supporting mechanism of an optical device is connected with a rotating mechanism of the optical device; analog lamp units are mounted on the rotating mechanism; a clamping device is positioned in front of the optical device; the analog lamp units of the optical device are opposite to a fixture of the clamping device; the fixture is used for clamping a to-be-detected sample; a detecting part of a detecting device is opposite to the to-be-detected sample which is clamped through the clamping device; a control device is connected with the optical device, the clamping device and the detecting device through cables; and a cooling device is positioned on one side of the optical device and connected with the analog lamp units of the optical device. The solar simulator provided by the invention is widely adaptive and can be applied to solar photo-thermal power generation experiments in different forms; and through the solar simulator, light spots can be automatically focused on, the sizes of the light spots can be continuously adjusted, and then the demand of the solar photo-thermal power generation experiments in the field of solar photo-thermal power generation can be met.