269results about How to "Quantity is easy to control" patented technology

The invention relates to a preparation method of a nitrogen and phosphor co-doped porous carbon nanotube. The method includes the following steps: 1) preparing a carboxylation carbon nanotube; 2) preparing a melamine-phenolic resin wrapped carbon nanotube by taking melamine-resorcinol-presence of formaldehyde resin as a precursor; and 3) conducting phosphatization: mixing the melamine-phenolic resin wrapped carbon nanotube obtained from the step 2) with a phosphatization agent, dispersing the mixture in deionized water in an ultrasonic manner, drying the mixture, enabling a dried product to rise to 600-900 DEG C in an inert atmosphere and to be phosphatized for 120-180min, naturally cooling the product to a room temperature, washing obtained black powder with water, performing pumping filtration until the powder is neutral, drying and finally obtaining the nanotube. The prepared nitrogen and phosphor co-doped porous carbon nanotube enables the specific capacitance of a capacitor to be substantially increased.

The invention discloses a degradable open porous magnesium and magnesium alloy biomaterial and a preparation method thereof. The magnesium and magnesium alloy biomaterial is in a completely open structure, the hole shape and size are controllable, holes are communicated by virtue of communicating holes, and the number and size of the communicating holes in hole walls are controllable; the holes are uniformly distributed and the porosity is adjustable. The preparation method comprises the following steps: sintering sodium chloride crystal particles to obtain an open porous sodium chloride prefabricated structure; pouring molten magnesium or magnesium alloy into a mould cavity with a sodium chloride prefabricated body, and performing seepage pressure casting; and removing magnesium or magnesium alloy block outer skin with the sodium chloride prefabricated body, washing with alkali, and filtering to remove sodium chloride to obtain the degradable open porous magnesium and magnesium alloy biomaterial. The preparation process is simple, convenient to perform and pollution-free; the prepared open porous structure is provided with the communicated and uniformly distributed holes, is controllable in hole shape and size, relatively high in porosity and strength, free of pore former residues and pore closing phenomenon and adjustable in degradation rate, and can serve as a new-generation degradable bone tissue engineering scaffold.

The invention discloses a degradable open-cell porous zinc / zinc alloy biomaterial and a preparation method thereof. The degradable open-cell porous zinc / zinc alloy biomaterial is of a completely open-cell structure, wherein the hole pattern and the size are controllable, holes are communicated by use of communicating holes, and the number and the size of the communicating holes in the hole walls are controllable; the biomaterial is even in overall hole distribution and adjustable in porosity. The preparation method of the biomaterial comprises the following steps that sodium chloride crystal particles are sintered to obtain an open-cell porous sodium chloride prefabricated structure; a zinc or zinc alloy melt is poured into a die cavity in which a sodium chloride prefabricated body is put and pressure seepage casting is performed; the outer skin of a zinc or zinc alloy block containing the sodium chloride prefabricated body is removed, and then alkali wash is performed and the sodium chloride is performed to obtain the degradable open-cell porous zinc / zinc alloy biomaterial. The preparation method of the degradable open-cell porous zinc / zinc alloy biomaterial is simple in process, convenient to operate and pollution-free; the obtained open-cell porous structure has the advantages that the holes are communicated with each other and distributed evenly, the appearance and size of the holes are controllable, the porosity and the strength are relatively high, no hole forming agent is left and hole closure is prevented, and meanwhile, the degradation rate is adjustable; as a result, the biomaterial can be used as a new generation degradable bone tissue engineering stent.

The invention provides an RH injection refining device and application thereof. The device comprises an RH ascending pipe and an RH descending pipe; pipe walls of the RH ascending pipe and the RH descending pipe are provided with through holes which are connected with an external air supply or a feeding device by spraying pipes. A method of removing small inclusions by using the device comprises:after deoxidation alloying, blowing inert gas into the descending pipe by using the spraying pipes, wherein the gas flow is 10-500L / min and air pressure is 1.0-15atm; or blowing carbonate power into steel liquid, wherein the particle size of the powder is less than 3mm, the feeding rate is 1-100kg / ton steel, the carrier is Ar, N2 or CO2 inert gas, the gas flow is 10-800L / min, and air pressure is 1.0-20atm. The invention has the characteristics of simple equipment, convenient operation, reasonable process, low cost, and good effect. The invention has the advantages of effectively removing small inclusions from steel, regulating alloying elements, manufacturing dispersion steel of small oxide, and achieving the aims of decarburization, desulfurization, dephosphorization, steel slag modification and the like.

The invention discloses an orientation jetting and fracturing exploitation method for coal bed gas under a coal mine. The method includes the steps that a drilled hole along a coal bed is formed in a top plate or a bottom plate; a fracturing pipe set and a radial perforator are placed in a first perforation position; the hole is sealed; the fracturing pump set and the perforator are connected with corresponding pump sets respectively, and a jet flow channel is formed by the perforator and used for communicating the coal bed and the drilled hole; annular fracturing liquid is injected into the drilled hole in a pressure mode, and meanwhile annular pressure is kept; the coal bed is continuously jetted for preset time so that cracks can be formed on coal bodies and extend in the bottom direction of jetting holes of the coal bed; jetting and fracturing are stopped at the same time, the perforator is moved to a next jetting position to form the jet flow channel, and then fracturing liquid is pressurize and jetted continuously; the steps of independently jetting a rock stratum and pressurizing and jetting the coal bed are repeatedly executed until jetting and fracturing at all positions in the drilled hole is finished, and then the coal bed gas is extracted. The orientation jetting and fracturing exploitation method has the advantages that the trend and the quantity of the cracks are controllable, exploitation efficiency of the coal bed is high, the gas disaster of the mine can be effectively prevented and treated, and economic and social benefits can be improved.

The invention provides a preparation method of an in-situ ternary nanoparticle reinforced aluminum-based composite material. According to the method, an in-situ reaction generation technology is adopted, powder containing a generation reinforcing particle forming element is used as a reactant, a low-frequency rotating magnetic field / ultrasonic field control technology is combined, and a nano-particle intermediate alloy is remelted to prepare the aluminum-based composite material. According to the ternary nanoparticle reinforced AA6016-based composite material prepared by the invention, the average particle size is 65 nm, and a comparison unit and biphase nanoparticles have an obvious thinning phenomenon. The room temperature mechanical property test shows that compared with a matrix aluminum alloy, the tensile strength of the ternary nanoparticle reinforced AA6016-based composite material prepared by the invention is improved by 27.46%-33.5%, the elongation rate is increased by 23.56%-30.89%, and the ternary nanoparticle reinforced AA6016-based composite material has great application potential in the fields such as aviation, aerospace, advanced weapons, automotive industry, precision instruments and other civil industries.

The invention relates to a method for generating a two-dimensional identical-focal spot array by using the radiation field of a planar array antenna. The method comprises the steps of firstly adoptinga 4[pai] focusing system composed of two high numerical aperture lenses; then arranging a virtual planar antenna array in the center of the focal plane of the 4[pai] focusing system composed of the two high numerical aperture lenses, wherein the electromagnetic field radiated by the antenna array is outwards propagated to the lens on the image space side, and completely collected by the two highnumerical aperture lenses, and then continuously propagated to the pupil planes of the two lenses, and thus field distribution on the pupil planes is achieved; and at last, regarding the field distribution on the pupil planes to be incident fields and reversely transmitting the incident fields to a focal region, so as to generate the two-dimensional identical-focal spot array with specific characteristics on the focal plane of the high numerical aperture lenses. According to the method provided by the invention, the two-dimensional identical-focal spot array having the specific quantity, separation distances and positions is generated by using the method with no need to optimize.

The invention discloses a seed treating and inoculating method for artificially inoculating cistanche deserticola ma serving as a traditional Chinese medicinal material. The invention provides a seed treating liquid for artificially inoculating cistanche deserticola ma. Due to the adoption of the seed treating and inoculating method for artificially inoculating cistanche deserticola ma serving asa traditional Chinese medicinal material, a method for artificially inoculating cistanche deserticola ma is improved, the inoculating position and quantity of the cistanche deserticola ma are easy tocontrol, the parasitic success rate (parasitic success can be up to 70 percent) and the working efficiency are increased greatly, the cost is lowered, and the benefit is increased.

The invention provides a long nozzle for pouring basket metallurgy and the application thereof; the long nozzle comprises a nozzle body, a through hole is arranged on the wall of an upper part of thenozzle and is connected with an external conveying pipe by a joint, and the axial direction of the through hole and the axial direction of the upper part of the nozzle form 10-90 degrees. The long nozzle can effectively control non-metallic inclusion in molten steel, accurately control and regulate the content of trace elements in molten steel and produce fine oxides to disperse steel; the long nozzle has simple structure and rational design, and has high efficiency on removing fine oxides and can slow down the blocking phenomenon of a pouring basket submersed nozzle; the long nozzle can control extra particle quantity , has high hit rate to trace alloy elements and uniform ingredients; by adopting the long nozzle, various beneficial additives are added in the steel, and the application isstrong, the operation is simple and the cost is low.

The invention discloses a following positioning method based on a UWB technology. Each UWB positioning base station is configured with an ID number and a following base station list. The UWB positioning label comprises a detection process and a positioning process. In the detection process, the label sends a detection message, the peripheral base stations perform delayed reply according to the IDnumbers of the peripheral base stations, the label calculates the distance between the base stations by using a unilateral bidirectional distance measurement method after receiving the reply, and a following base station list of the nearest base station is stored; in a positioning process, the label sends a starting message containing a following base station list; and after receiving the message,the peripheral base station performs delay and reply according to the position of the ID of the peripheral base station in the list, the label sends an end message after receiving the reply, the label finds the nearest base station according to a unilateral bidirectional distance measurement method and updates a following base station list, and the base station calculates the distance according to a bilateral bidirectional distance measurement method and uploads the distance. According to the following positioning method provided by the invention, the problem of message conflict in the replyprocess of the base station is solved, and the ranging stability is improved.