35results about How to "Overcome preparation difficulties" patented technology

The invention discloses a method for preparing a hydrogenation catalyst composite, comprising the following steps of: (1) preparing a NixWyOz composite oxide precursor by using a coprecipitation method; (2) pulping, mixing and filtering the NixWyOz composite oxide precursor and MoO3; and (3) forming and activating the NixWyOz composite oxide precursor and the MoO3 to form a final catalyst, wherein the process of manufacturing the NixWyOz composite oxide precursor comprises the steps of: preparing acid solution A containing an active metal Ni component according to a component content proportion of the catalyst; preparing solution B containing an active metal W component according to the component content proportion of the catalyst; merging the solution A and the solution B, and adding the mixture of the solution A and the solution B into a reaction tank to gelatinize; and generating a deposited mixture to obtain the precursor containing the composite oxide NixWyOz. The catalyst prepared by the method has the advantages of uniform dispersion of metals, high use performance, and particularly higher activity for deep impurity removal process of hydrocarbon. The method is simple and convenient, and has low metal loss. The method is mainly used for preparing a bulk phase catalyst with higher metal content.

The invention provides a liquid drop whispering gallery mode laser and a manufacturing method thereof. According to the liquid drop whispering gallery mode laser, a first single-mode optical fiber with the middle being provided with a cone area is connected with a pump light source and a spectrograph, a second single-mode optical fiber is connected to a trapping light source and an annular core optical fiber, the front end of the annular core optical fiber is processed into a cone frustum shaped optical fiber tip, a laser beam emitted by the trapping light source is injected into a fiber core of the annular core optical fiber through the second single-mode optical fiber, total reflection and refraction occur in light at an inclined plane of the cone frustum shaped optical fiber tip of the annular core optical fiber, an annular convergence optical field is formed near the cone frustum shaped optical fiber tip so as to realize an optical tweezers function, the optical tweezers stably capture a micro liquid drop, the captured liquid crystal micro liquid drop is enabled to be close to the cone area of the first single-mode optical fiber, the pump light source injects from the front end of the first single-mode optical fiber, and the spectrograph detects excited laser light at the rear end of the first single-mode optical fiber. According to the invention, a high Q-value liquid drop micro spherical cavity with a perfect surface is formed by surface tension, and the optical tweezers stably control the liquid drop micro-sphere. The liquid drop whispering gallery mode laser provided by the invention has an extremely low threshold.

The invention relates to a single-tooth type gear integrated error measuring device and a method thereof, and belongs to the precision measuring technology and the technology field of mechanical transmission. The method uses a single-tooth measuring gear as a measuring element to realize the rolling point scanning measurement of all gear teeth of gears of different specifications to be measured. Angular displacement signals generated in the transmission process of the sing-tooth measuring gear and the gears to be measured are converted into electrical signals through a sensor; the signals are input into a computer after passing through a pre-processing circuit and a data acquisition board; four types of integrated error curves, the geometrical deviation of each item, the three-dimensional tooth surface typological deviation and the contact zone aspect graph of the gears to be measured are obtained through analysis and data processing; and the error result and the error curve can be shown and printed. According to the method, one measuring gear completes the measurement of the gears of different specifications to be measured and realizes flexible measurement of the gear integrated error. The single-tooth measuring gear has the advantages of convenient manufacture, low cost, high precision, wide application range, ensured measurement precision and extended measuring range.

The invention discloses a method for preparing a Zn-doped p-type beta-Ga2O3 nanowire according to a chemical vapor deposition method. The method provided by the invention comprises the following steps: carrying out evaporation to form a metal catalyst layer which is 1-50 nm thick on a cleaned substrate; sufficiently mixing a Ga source and a Zn source according to a certain mass ratio to prepare a reaction source material; putting the reaction source material and the substrate on which the metal catalyst layer is formed through evaporation into a quartz boat, and then putting the quartz boat into a high-temperature heating zone in a chemical vapor deposition system growth chamber, wherein the substrate is positioned in the downstream direction of gas flows and 1-2 cm away from the reaction source material, injected high-purity argon gas is carrier gas, and the argon gas flux is 50-500 ml / min; when the heating temperature reaches 600-1100 DEG C, injecting oxygen and keeping the oxygen flux of 1-5 ml / min for 15-30 minutes; stopping the oxygen injection, keeping the argon gas flux, cooling to 100 DEG C and below, and taking out an obtained sample.

The invention discloses a method for preparing Naratriptan [N-methyl-3- (1-methyl-4-piperidine)-1,4-indole-5-ethyl thiamine], employing 5-halogenated indole as start raw material, through cyanation, reduction, condensation with N-methyl methanesulfonamide, hydrogenation for reduction, condensation with N-methyprylone, and again hydrogenation for reduction to get the target compound. The invention is characterized by the designation of the synthetic Naratriptan course of easy-to-get raw amterial and low operating cost, overcoming the shortcomings of hard preparation of raw material and high operating cost in current technology.

The invention relates to a method for preparing a p-type ZnO nano-wire, belonging to the semiconductor doping technical field. The invention relates to a doping technology for the p-type ZnO nano-wire, in particular to a doping technology by adoption of the chemical vapor deposition technology and utilization of arsenide as a p-type dopant of ZnO. The doping technology is characterized in that: the doping technology adopts the arsenide as a doping source of the p-type ZnO and utilizes the chemical vapor deposition technology to prepare the arsenic doped p-type ZnO nano-wire. Under the condition that the heating temperature is between 400 and 700 DEG C, the proportion of arsenic doped into the ZnO is controlled by adjusting the mol ratio of the arsenide and zinc, so as to perform growth of the p-type ZnO. The doping technology has the advantages that: the doping technology provides a simple and effective growth technology for preparing the p-tyype ZnO nano-wire with high quality and strong controllability, overcomes the defect of difficult doping of the p-type ZnO nano-wire, and further realizes a p-n junction photoelectric device of the ZnO nano-wire.

The invention provides an efficient measurement element, device and method for integrated gear errors, and belongs to the field of the precision testing technology and instrument and the mechanical transmission technology. The combined standard element is composed of two measurement half-gears in a combined mode, wherein the two measurement half-gears are installed coaxially, can rotate independently and are respectively provided with a circular grating, and the independent angle position of each measurement half-gear can be measured; meanwhile, the device and method using the element for conducting specific gear measurement are provided. According to the efficient measurement element, device and method, the defect that one-side tooth surface measurement can be completed only after a measured gear rotates by two or more circles during integrated gear error measurement at present is overcome, one-side tooth surface measurement can be completed only after the measured gear rotates by one circle, and in the measurement process, under the condition that the measured gear rotates at the same speed, measurement time can be shortened by more than one time after the measurement method is adopted.

The invention provides an optical voltage transformer based on an SF6 coaxial capacitance voltage divider. The optical voltage transformer comprises a high voltage shell, an insulation casing and a base. The high voltage shell and the insulation casing are connected to a whole body. Both the high voltage shell and the insulation casing are filled with SF6 gas. The base is fixedly connected to the insulation casing, and the base and the insulation casing are separated by a baffle plate. The base is provided with a grounding terminal. The invention relates to the optical voltage transformer based on the SF6 coaxial capacitance voltage divider. By using the SF6 coaxial capacitor formed by a primary conduction rod and an annular metal electrode as a high voltage side voltage divider capacitor, the problem of difficult manufacture of a current optical voltage transformer high voltage capacitor. The transformer has the advantages of small size, light weight and high accuracy, and the overall error is less than 0.1%.

Disclosed herein is an electromagnetic induction sensor that is used with a position indicator and includes coils for electromagnetic coupling with the position indicator. The electromagnetic induction sensor includes: a sensor board main body that includes an insulating substrate and a surface sheet attached to a side of a first surface of the insulating substrate, on which side a position is indicated by the position indicator; at least part of conductors forming the coils being formed on a second surface of the insulating substrate opposite from the first surface; and an overlay member that includes a magnetic powder material layer and is adhered to the side of the second surface of the sensor board main body.

The invention relates to a method for preparing a microsphere cavity laser based on ultra-strong up-conversion multi-component glass material, and belongs to the technical field of microsphere cavitylasers. The method comprises the preparation of Yb-Er ion co-doped multi-component fluorosilicate glass and Yb-Er ion co-doped glass microspheres. And the prepared microspheres are packaged by a laser. The Preparation method of microsphere cavity laser based on ultra-strong up-conversion multi-component glass material combines the ultra-high up-conversion quantum efficiency of Yb-Er ions in the fluorosilicate glass with the high quality factor of the glass microspheres, and solves the problems of uncontrollable crystallization in the development process of the prior-conversion optical fiber laser and the over-high pumping threshold value. According to the invention, the pumping light intensity is greatly enhanced through optical path coupling, resonance of the whispering wall mode is realized in Yb-Er co-doped fluorine silicate microspheres, and finally laser output with narrow line width is realized. The method is simple in preparation process, belongs to the wave band with the smallest transmission loss in seawater, can be used for naval equipment, and solves the problem of detection of underwater targets and marine communication.

The invention belongs to the technical field of heavy metal ion adsorption separation and relates to an application and preparation method of a hexavalent chromium ion imprinted composite membrane with alpha-methacrylic acid serving as a functional monomer. The method includes that by adoption of hexavalent chromium ions as template ions, alpha-methacrylic acid as the functional monomer, glycol dimethyl acrylate as a cross-linking agent, azodiisobutyronitrile as an initiator and a pore forming solvent formed by mixed solution of an organic solvent and water in a volume ratio of 1:1, the hexavalent chromium ion imprinted composite membrane is prepared according to a surface grafting method. By combination of the ion imprinting technique and the membrane separation technique, complex operations such as grinding or screening are avoided, specific recognition sites can be protected, high stability, high environmental adaptability and availability for extreme solution environments are realized, and application to adsorption separation of hexavalent chromium ions in solution containing Cr (VI) is realized.

Disclosed herein is an electromagnetic induction sensor that is used with a position indicator and includes coils for electromagnetic coupling with the position indicator. The electromagnetic induction sensor includes: a sensor board main body that includes an insulating substrate and a surface sheet attached to a side of a first surface of the insulating substrate, on which side a position is indicated by the position indicator; at least part of conductors forming the coils being formed on a second surface of the insulating substrate opposite from the first surface; and an overlay member that includes a magnetic powder material layer and is adhered to the side of the second surface of the sensor board main body.

The invention discloses a preparation method of a 1550 nm waveband single photon source, the single photon source and an optical device. The preparation method comprises the following steps: preparinga silicon oxide layer on a SiC wafer (0001) surface; carrying out ion implantation; bonding with another SiC substrate with a silicon oxide dielectric layer along the surface of the silicon oxide; carrying out annealing stripping, and transferring the SiC film to the SiC substrate; preparing a mask on the SiC film, and removing the mask pattern to expose a part of the SiC film; performing V ion implantation, and removing the mask region; preparing a C film, and activating a V ion doping method step; and transferring the SiC film to a substrate through ion implantation, and preparing a 1550 nmcommunication band single photon source. According to the invention, the problems that a 1550 nm light source of an existing photonics platform is difficult to prepare and a single photon source andan optical device are difficult to integrate are effectively solved, a 1550 nm communication light source with high uniformity and high quality is obtained on a SiC platform, and the single photon source and the device are integrated on the same platform.

The present invention discloses a method for preparing p type ZnO film by Sb doping, belonging to the field of semiconductor doping technology. The invention relates to a p type Zno doping technology, particularly to a doping technology by metal organic chemical vapor deposition (MOCVD) technology, which uses organic source as the p type doping agent of ZnO. The method is characterized in: with antimony metallorganic as the doping source of p type ZnO, antimony doping p type ZnO film is prepared by metal organic chemical vapor deposition. When the temperature of a substrate is 250 DEG to 650 DEG C, the proportion of antimony doping to ZnO is controlled by adjusting the carrier gas flow rate of antimony metallorganic and zinc metallorganic to grow p type ZnO. The effect and benefit of the invention lies in a high-quality high-controllability p type ZnO growing technology is provided, which is an industrial production transplantable metal organic chemical vapor deposition technology, the difficulty of p type ZnO doping is overcome, thus to realize p-n junction type optoelectronic devices of ZnO.

Belonging to the technical field of membrane separation, the invention discloses a preparation method and application of a trivalent chromium ion imprinted composite membrane. The ion imprinted composite membrane provided by the invention is economical, practical, and simple in process, and can be used for selective adsorption and separation of trivalent chromium ions in water. The specific methodincludes: taking a commercially available membrane as the support membrane, adopting trivalent chromium ion as the template ion, using 2-vinyl pyridine as the functional monomer, combining ion imprinting technology with membrane separation technology, employing thermal initiation for thermal polymerization of the functional monomer and template ion on the surface of support membrane, and then performing elution to remove the template ion, thus obtaining the trivalent chromium ion imprinted composite membrane. The imprinted composite membrane has imprinted holes matching the shape, size and dimension of trivalent chromium ion on the surface, can specifically identify trivalent chromium ions in the target solution, and can effectively adsorb trivalent chromium ions in the solution.

The invention discloses a preparation method of a nano silicon carbide and hollow glass bead mixed reinforced porous aluminum-based composite material, and relates to a preparation method of an aluminum-based composite material. The problems that hollow glass beads are low in strength, and a porous aluminum-based composite material prepared from the hollow glass beads is low in strength and poor in energy absorption effect are solved. The method comprises the steps that hollow glass beads, silicon carbide reinforcement, aluminum metal powder and aluminum ingots are weighed, the silicon carbide reinforcement and the hollow glass beads are mixed to obtain composite powder, the dried composite powder and the aluminum metal powder are mixed to obtain mixed powder, and a graphite mold is filled with the mixed powder to obtain a preheated prefabricated body; molten aluminum metal is prepared; and finally, liquid aluminum is infiltrated. The nano silicon carbide and the hollow glass beads are mixed, the silicon carbide reinforcement can uniformly cover the surfaces of the glass beads, and the silicon carbide reinforcement and the glass beads form mechanical combination, so that the bearing capacity of the hollow glass beads is improved, and the composite material has relatively high porosity.

The invention discloses an ultra-low-threshold multi-component holmium ion doped glass material. The molar composition of the glass material is expressed as 72TeO2-20ZnO-5Na2CO3-2Y2O3 according to a chemical formula, and Ho<3+> ions with the concentration of 1 mol% are doped. The invention further provides a preparation method and a control method of a microsphere cavity laser based on the ultra-low-threshold multi-component holmium ion doped glass material. The microsphere cavity prepared by the method is perfect in surface and has an extremely high Q value, the manufactured laser is extremely low in threshold, the coupling efficiency is greatly improved, the problems of low output power and low collection energy efficiency of an echo wall mode micro-cavity laser are effectively solved, and a high-efficiency and low-threshold narrow-bandwidth optical fiber mid-infrared optical fiber micro-cavity laser can be realized.

The invention relates to a gear overall error measuring device and method, belonging to the technical fields of precision testing technology, instruments and mechanical transmission. The invention uses a single-tooth measuring gear as a measuring element to realize rolling point scanning measurement of all teeth of gears to be tested with different specifications. Through the sensor, the angular displacement signal generated by the single-tooth measuring gear and the gear under test during the transmission process is converted into an electrical signal, which is input into the computer after the pre-processing circuit and the data acquisition card, and the four-dimensional information of the gear under test is obtained through analysis, calculation and data processing. It can display and print the error results and error curves. The invention uses the same measuring gear to complete the measurement of the measured gears with different specifications, and realizes the flexible measurement of the overall error of the gear. The single-tooth measuring gear is easy to manufacture, low in cost, high in precision and wide in application range, which ensures the measurement accuracy and expands the measurement range.

The invention belongs to the technical field of composite material preparation, and relates to a method for preparing a shell-like light-weight high-strength composite material. The specific method is (1) using leaf-shaped amorphous-crystalline heterogeneous manganese dioxide nanosheets prepared by a redox method and Hummers Graphene oxide obtained by the oxidation method is used as the main building unit, combined with a small amount of biological macromolecules, and a high-strength composite film material is prepared by evaporation-induced self-assembly method; (2) A large number of composite film materials are brushed with a cross-linking agent layer by layer Assembled into one body, combined with hot pressing process to obtain light weight and high strength block layered micro-nano composite material. The preparation process of the invention is simple and convenient to operate, and the process is green and environment-friendly, and the strength of the finally prepared bulk composite material is far superior to most other graphene oxide-based bulk composite materials.

The invention discloses a method for synthesizing C11 perfluoro-ketone. The method is characterized by taking a hexafluoropropylene oxide (HFPO) dimer and perfluoro-n-propyl vinyl ether (PPVE) as starting materials, taking potassium fluoride or cesium fluoride as a catalyst under suitable reaction conditions and obtaining C11 perfluoro-ketone through one-step reaction under the condition of catalysis. The method for synthesizing C11 perfluoro-ketone has the beneficial effects that by utilizing the method, the product yield is more than 80%; the raw materials are easy to prepare, the reaction yield is increased, and the method is easy to operate, is easy in purification, can be used for carrying out large scale production and has high social and economic values; researches find that the final product is obtained through one-step reaction by using the HFPO dimer and PPVE as starting reactants; the reaction temperature is lower, the reaction speed is high and the reaction yield is higher, so that large scale production of the compound is easy to achieve.

The invention provides an efficient measurement element, device and method for integrated gear errors, and belongs to the field of the precision testing technology and instrument and the mechanical transmission technology. The combined standard element is composed of two measurement half-gears in a combined mode, wherein the two measurement half-gears are installed coaxially, can rotate independently and are respectively provided with a circular grating, and the independent angle position of each measurement half-gear can be measured; meanwhile, the device and method using the element for conducting specific gear measurement are provided. According to the efficient measurement element, device and method, the defect that one-side tooth surface measurement can be completed only after a measured gear rotates by two or more circles during integrated gear error measurement at present is overcome, one-side tooth surface measurement can be completed only after the measured gear rotates by one circle, and in the measurement process, under the condition that the measured gear rotates at the same speed, measurement time can be shortened by more than one time after the measurement method is adopted.

The invention discloses a method for preparing a Zn-doped p-type beta-Ga2O3 nanowire according to a chemical vapor deposition method. The method provided by the invention comprises the following steps: carrying out evaporation to form a metal catalyst layer which is 1-50 nm thick on a cleaned substrate; sufficiently mixing a Ga source and a Zn source according to a certain mass ratio to prepare a reaction source material; putting the reaction source material and the substrate on which the metal catalyst layer is formed through evaporation into a quartz boat, and then putting the quartz boat into a high-temperature heating zone in a chemical vapor deposition system growth chamber, wherein the substrate is positioned in the downstream direction of gas flows and 1-2 cm away from the reaction source material, injected high-purity argon gas is carrier gas, and the argon gas flux is 50-500 ml / min; when the heating temperature reaches 600-1100 DEG C, injecting oxygen and keeping the oxygen flux of 1-5 ml / min for 15-30 minutes; stopping the oxygen injection, keeping the argon gas flux, cooling to 100 DEG C and below, and taking out an obtained sample.

The invention discloses an ultra-low threshold multi-component holmium ion-doped glass material, the molar composition of the glass material is expressed as: 72TeO 2 ‑20ZnO‑5Na 2 CO 3 -2Y 2 o 3 and doped with Ho at a concentration of 1 mol% 3+ ion. The invention also provides a preparation method and a control method of a microsphere cavity laser based on an ultra-low threshold multi-component holmium ion-doped glass material. The surface of the microsphere cavity prepared by the invention is perfect, has a very high Q value, the threshold value of the produced laser is extremely low, and the coupling efficiency is greatly improved, which effectively solves the problems of low output power and low collection energy efficiency of the whispering gallery mode microcavity laser, and can be used Mid-infrared fiber microcavity lasers for high-efficiency, low-threshold narrow-bandwidth fibers.

The invention belongs to the field of pharmaceutical chemicals and discloses a new method for combining ethyl sulfonamide; in the invention, indoline is used as starting material, and the target compound: N-methyl-1H-benzpyrole-5-ethyl sulfonamide is obtained by the steps of benzyl protection, formylate, condensation with N-methyl methanesulfonamide, hydrogenation reduction, debenzyl and oxidation and the like; in the combining route, the raw material is easily to obtain, the process is simple, the yield is high, the operation is convenient, the environment is friendly, the disadvantages thatthe raw material preparation is difficult and the regent cost is overhigh in the prior art are overcome, and the method has industrial application value.

The invention provides a semiconductor device and a manufacturing method thereof. The semiconductor manufacturing method comprises the following steps of: providing a first substrate; forming a firstwell region on a surface of the first substrate; forming a second well region in the first well region; Providing a second substrate having the same conductivity type as the first substrate; Forming athird well region on the surface of the second substrate; Bonding a surface of the first substrate that does not form a well and a surface of the second substrate that does not form a well. The device formed by the method can realize high-voltage reverse voltage withstand, and the manufacturing process is compatible with the traditional IGBT manufacturing process, the process is simple, the implementability is strong, and the problems of the prior art such as difficulty in manufacturing the high-voltage reverse resistance IGBT, high cost and the like are overcome.

Provided is a split type single-tank solid accumulation bed heat storage system. A split type solid accumulation bed heat storage tank of the system is formed by stacking a top conical heat storage tank body (1), multiple split type cylindrical heat storage tank bodies and a bottom conical heat storage tank body (16) in parallel in the height direction. The two conical heat storage tank bodies (1 and 16) are connected with the split type cylindrical heat storage tank bodies through flanges (12). A fluid inlet pipeline (2) and a fluid outlet pipeline (17) are mounted on the upper portion of the top conical heat storage tank body (1) and the lower portion of the bottom conical heat storage tank body (16) respectively. A current equalizer (7) is mounted at the bottom of the top conical heat storage tank body (1), and the bottom of each split type cylindrical heat storage tank body is provided with a porous supporting grate (11). Solid heat storage materials are supported by the supporting grates (11) so as to be accumulated in the split type cylindrical heat storage tank bodies to form a porous bed body, and a heat transfer fluid channel is formed. The heat storage materials in the split type cylindrical heat storage tank bodies are different, and the accumulation modes are different.

The invention provides a large-diameter liquid crystal lens array adopting a composite dielectric layer. The liquid crystal lens array comprises an upper substrate, a common electrode, a high dielectric layer, a liquid crystal layer, the composite dielectric layer, a pixel electrode and a lower substrate from top to bottom. The liquid crystal layer is prepared from a nematic liquid crystal material. The upper substrate and the lower substrate are glass substrates with plane-transparent electrodes. The composite dielectric layer comprises the high dielectric layer and a protruding material layer, and the two materials are mutually dissolved. A set of complete technological production process is provided for the composite dielectric layer. Accordingly, a large-diameter liquid crystal lens array with the diameter at the millimeter level can be produced, and meanwhile the manufacturing process difficulty and the production cost of a liquid crystal lens are lowered.

The invention provides a droplet whispering gallery mode laser and a manufacturing method thereof. The first single-mode fiber with a tapered area in the middle is connected to the pump light source and the spectrometer respectively, and the second single-mode fiber is respectively connected to the capture light source and the ring-core fiber. The laser beam is injected into the core of the ring-core fiber through the second single-mode fiber, and the light is totally reflected and refracted at the inclined surface of the ring-core fiber's frustum-shaped fiber tip, and a ring-shaped converging light field is formed near the cone-shaped fiber tip to realize the function of optical tweezers , the optical tweezers stably capture the micro-droplets, and the captured liquid crystal micro-droplets are brought close to the taper of the first single-mode fiber, the pump light source is injected from the front end of the first single-mode fiber, and the spectrometer is detected at the rear end of the first single-mode fiber excited laser. In the present invention, a high-Q droplet microsphere cavity with a perfect surface is formed by surface tension, and the optical tweezers stably control the droplet microsphere, and the droplet whispering gallery mode laser has an extremely low threshold.