30results about How to "Free diffusion" patented technology

The invention relates to a graphene doped lithium iron phosphate positive electrode material and a preparation method thereof. The method comprises the following steps of: (1) mixing a soluble lithium compound, phosphate and a ferrous salt into a dispersing agent to obtain a dispersing solution a; (2) oxidizing a graphene derivative material to obtain an oxidized graphene derivative material, and performing ultrasonic dispersion to obtain a dispersing solution b; and (3) mixing the dispersing solution a and the dispersing solution b, stirring uniformly, spray-drying, and calcining to obtain the graphene doped lithium iron phosphate positive electrode material. A lithium iron secondary battery prepared from the graphene doped lithium iron phosphate positive electrode material has the advantages of high capacity, good circulating performance, large tap density, small internal resistance and long service life.

The invention relates to a preparation method of glass immobilized enzyme with a biological activity. The method comprises the following steps of: preparing a microbial emulsion by lactobacillus salivarius and an MRS culture medium; mixing the microbial emulsion, a silicon source, a phosphorus source, calcium salt and MO salt to sol; hydrothermally aging to form gel; drying to obtain xerogel; thermally treating to obtain a porous glass carrier material with biological activity. Enzyme in the duct is directly bonded and fixed with surface by the characteristics of biological activity and compatibility of the porous glass carrier material with biological activity, excellent surface chemical performance, adjustable multi-pore structure and enzyme molecular size matched so as to obtain a porous glass immobilized enzyme biological catalyst with biological activity. The method has the characteristics of high enzyme load, high enzyme activity, good thermal and chemical stabilities, repeated use, no pollution to products and the like, and can be used to the fields of fine chemical industry, food industry, biological chemicals, wastewater treatment, medicines and the like.

The invention relates to a method for growing an upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond substrate, which comprises the following steps: firstly, when electro-deposition is used in an electrochemical technique, using hydrogen bubbles generated on the surface of a boron-doped diamond film substrate material as a dynamic template so as to obtain an upright three-dimensional netlike nano Zn plate; and secondly, in the process of performing a chemical method, using the upright three-dimensional netlike nano Zn plate as a template, and through substitution reactions, using high valent noble metal to replace the upright three-dimensional netlike nano Zn plate so as to obtain the upright three-dimensional netlike noble metal nano-plate on a boron-doped diamond film. The special structure obtained by the method not only can give full play to the advantages of the boron-doped diamond, but also can greatly improve the specific surface area of the noble metal and effectively promote the diffusion of active reaction molecules in a hole pipeline by a netlike nano structure. Simultaneously, the special combination ensures that a working electrode obtains high electrochemical properties in material types and structural shapes.

The invention discloses a method of increasing the properties of the gallium nitride-based transistor material and device with indium doping and applies in the field of making gallium nitride-based HEMT or HFET materials and devices. The method and process is to form the gallium nitride-based high electron mobility transistor or heterostructure field effect transistor materials on SiC or Si single crystal substrate grown by metal-organic chemical vapor deposition epitaxial growth system. After the AlN or AlGaN nucleating layer and the GaN buffer layer are grown on the SiC or Si single crystal substrate, a GaN channel layer, an AlN insert layer, an AlGaN barrier layer and a GaN capped layer are grown, and trimethyl indium is added in the growth atmosphere to do epitaxial growth with indium doping. The dislocation of the material or device made by the method of the invention is reduced greatly. The invention improves the interfacial smoothness, increases the electron mobility of the material, increases the growth window, ensures the material grow easier, improves the current collapse of the device, reduces the leakage current and increases transconductance and gain and increases the output power of microwave power devices.

The invention discloses a rotating device for a mobile satellite antenna, which comprises an antenna frame, a base, a motor, a driving pulley and a driven pulley, the base is fixedly connected to the mobile carrier, the antenna frame is connected to the base in rotation, and the driving pulley is driven by the motor. The shafts are coaxial and fixedly connected, the driven pulley is set coaxially with the central axis of the antenna frame and the two are fixed. The winding post is covered with a spiral cable, and the antenna frame is fixed with a winding fixing seat. One end of the spiral cable is fixed on the winding fixing seat, and the other end of the spiral cable is fixed on the winding post. the top of. The advantage is to prevent the limit device from being triggered when the mobile carrier turns around quickly and changes direction by 180°, and the phenomenon of star loss occurs. In addition, the coil of the helical cable can shrink and spread freely during the rotation of the antenna frame to prevent the cable from being twisted. broken.

The invention provides a dressing containing trehalose reparable skin barriers and a making process of the dressing. The dressing comprises the following raw materials in parts by weight of 55-100 parts of trehalose, 13-25 parts of hippophae rhamnoides fruit polysaccharide, 65-95 parts of glycerine, 32-46 parts of sweet almond oil, 13-20 parts of glusulase, 25-35 parts of pentadiol, 3.0-5.0 partsof phenoxyethanol, 2.3-3.5 parts of triethanolamine and 765-852 parts of water. According to the dressing prepared by a specific technology and limited technology parameters, the repair capacity of skin is improved, skin sensibility after laser therapy can be relaxed, and the repair time of damaged skin can be shortened.

The invention relates to a preparation method of an anti-ultraviolet aging polyphenylene benzodioxazole fiber, which comprises the following steps: adding raw materials into a prepolymerizer according to the mixing ratio, removing chlorine hydride gas at certain temperature, gradually increasing the temperature to 160-180 DEG C, carrying out reaction for 12-48h, then transferring into a twin-screw reactor for carrying out postpolymerization, obtaining PBO / PPA spinning solution which is in line with requirements, and quantitatively conveying into a spinning component by a metering pump; and extruding the PBO / PPA spinning solution by a spinneret plate at 150-200 DEG C, passing through an air gap layer of 50-300cm for stretching, then entering into a coagulation bath, passing through a washing process of 50-300m with warm water at about 30-50 DEG C after passing through the coagulation bath, drying at 70-110 DEG C, then winding at the speed of 50-200m, obtaining a PBO protofilament, continuously carrying out heat treatment at 550-650 DEG C and obtaining the high-modulus PBO fiber, wherein an anti-aging agent is added in coagulation bath solution in advance. The anti-ultraviolet agingpolyphenylene benzodioxazole fiber has the advantages that the anti-aging agent is closed and retained in the fiber, thereby giving the durable anti-aging property to the fiber; and the process is simple and applicable to the industrial operation.

The invention relates to a composite film electrode and a preparation method thereof. The electrode is a graded porous nano composite film which is composed of an insulating substrate, a first binding layer, a conductive gold layer, a second binding layer and a modified aluminum layer, wherein small holes with a hole diameter of 2-20 nm are uniformly distributed on the conductive gold layer according to a distribution density of 1010 / cm2-1012 / cm2, and the small holes with the hole diameter of 20-400 nm are uniformly distributed on the second binding layer and the modified material layer according to the distribution density of 109 / cm2-1012 / cm2; and the preparation method of the electrode comprises the following steps of: firstly, preparing a multi-layer composite film on the insulating substrate, then, performing anodizing and hole enlargement on the multi-layer composite film to implement that an aluminum layer becomes a porous alumina layer, a gold layer becomes a nano porous structure, the second binding layer becomes a porous oxide of tantalum, niobium or titanium, and cleaning and drying the multi-layer composite film to get a finished product of the graded porous nano alumina / gold composite film electrode. The graded porous nano alumina / gold composite film electrode has high in electroanalytical activity and the dual advantages of a nano porous gold and a porous anodizedaluminum; and the preparation method is simple and reliable, solves the defect of inconvenience in operation caused by high brittleness of an AAO, and fits for mass production.

The invention discloses a method for efficiently removing phosphorus in nutrient-rich water bodies. Specifically, cement and bentonite are used as phosphorus removal agents, and the mass ratio is 80% of cement and 20% of bentonite. The addition amount of the above-mentioned phosphorus removal agent in the water body to be treated is 0.025%-0.2% in parts by mass. The above phosphorus removal agent is added to the water body to be treated, mixed, reacted, and left to stand, and the treatment of the water body can be completed. The dephosphorization agent of the present invention is in powder form and can be directly added into the water body. After being added, it can be evenly dispersed in water and reacted with water. Therefore, the present invention does not need to add other special facilities and equipment, and the dephosphorization operation is simple and convenient. The cost of the phosphorus removal agent used in the method of the invention is lower than that of the conventional phosphorus removal agent currently used in the market, and the raw materials are easy to obtain and easy to realize industrialization. After being treated by the method, the total phosphorus in the water body can quickly reach the relevant standard.

The present invention relates to a method for glass fusion. The method includes the following steps: laminating the glass; microwave processing the glass after the lamination processing; and welding the glass after the microwave processing. First, the glass is laminated to enhance the surface interface activity of the glass and promote the bonding between the glass interfaces; then the laminated glass is subjected to microwave treatment, the microwave penetrates into the glass, and the interaction between the microwave and the glass generates friction. It causes the temperature of the glass to rise, so that the inside and outside of the glass are heated and heated almost at the same time, forming a body heat source state, and the heating inside and outside the material is uniform; no additional pressure is required, and the glass interface will diffuse freely during the microwave treatment process, thus achieving tightness between the glasses. At the same time, the high temperature generated by the microwave can make the interface group of the glass group have a weak connection. After high temperature welding, the silicon-oxygen bond between the glasses can be promoted, and the tight connection of the glass sheets can be realized. Effect.

The invention discloses a deposition furnace for preparing quartz glass ingots, which comprises: a furnace body, the furnace body is composed of a furnace top, a furnace wall and a furnace bottom, and the furnace top, furnace walls and furnace bottom form a furnace; a burner , arranged on the top of the furnace; the base rod extends vertically from the bottom of the furnace into the furnace, the base rod can move in the vertical direction relative to the furnace body, and the base rod can rotate with its axis as a rotation axis; The deposition base is arranged on the top of the base rod and is fixedly connected with the base rod. The diameter of the deposition base is larger than the diameter of the base rod. The deposition base provides a basis for the deposition of quartz glass ingots; the auxiliary heating device is in the furnace It is arranged around the periphery of the deposition base and is used to increase the edge temperature of the quartz glass deposition mound. The invention reduces the temperature gradient of the deposition surface, improves the consistency of the component distribution of the quartz glass ingot, and produces the quartz glass ingot with uniform radial and axial structures.

The invention relates to a filter screen, a preparation method of the filter screen and a filter device using the filter screen, wherein the filter screen includes a collection base cloth and a nanofiber layer using the collection base cloth as a base, and the nanofiber layer is obtained by electrospinning Positively charged nanofibrous structures prepared by the silk method. The filter screen of the present invention adopts a nanofiber structure, has the advantages of high specific surface area and high porosity, and can significantly enhance the interception effect on tiny particles.