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606results about How to "Not easy to penetrate" patented technology

Ga2O3 Schottky diode device structure and manufacturing method thereof

The invention discloses a Ga2O3 Schottky diode device structure and a manufacturing method thereof, and mainly aims at solving the problems that a present Schottky diode device is low in reverse breakdown voltage and the parasitic capacitance in a field plate structure is high. The Ga2O3 Schottky diode device structure comprises a cathode electrode, a heavily-doped n type Ga2O3 substrate, a low-doped n type Ga2O3 epitaxial layer and an anode electrode from bottom to top; Schottky contact is formed in the part where the anode makes contact with the epitaxial layer, the cathode and the substrate make ohmic contact, grooves are distributed separately in the low-doped n type Ga2O3 epitaxial layer, intervals of grooves are increased progressively within the range of 0.3 to 0.5 micron, the first groove is positioned below the edge of the anode, the distance between the last groove and the first groove ranges from 10 to 15 micron, and AlGaO layers in which the Al component is greater than 20% are grown in an epitaxial manner in the grooves respectively. Thus, the reverse breakdown voltage is improved, the parasitic capacitance is reduced, positive characteristic is kept unchanged, and the structure and manufacturing method thereof can be used for high-speed integration circuits and microwave technologies.
Owner:XIDIAN UNIV

Stone crystal surface treatment composition and manufacturing method thereof

The invention discloses a stone surface treatment crystallizing agent comprising the following components in percentage by weight: 0.5-5% of polyolefin wax, 10-30% of fluorosilicic acid or fluorosilicate, 1-6% of acidity regulator, 0.5-5% of quick drying agent and the balance of water, wherein the polyolefin wax is added in an emulsion form, and the solid content of the polyolefin wax emulsion is kept within the range of 20-60%. The crystallizing agent disclosed by the invention can be used for crystallizing stones such as marble, waterstone or special granite and simultaneously hardening and brightening the surface of a stone floor so as to provide high glossiness and improved slip resistance for the crystal surface of the floor while protect the floor. Meanwhile, the treated stone surface has enhanced mechanical performance as well as higher wear resistance and chemical corrosion resistance, and water-soluble stains are not easy to permeate into the stone. The stone surface treated by using the crystallizing agent disclosed by the invention can be cleaned and treated by using water and is convenient and rapid in later-period maintenance and reduced in the maintaining cost as comparison with the stone surface treated by using a conventional waxing treatment method.
Owner:ECOLAB USA INC

Annular halamine type polymeric antibacterial agent containing quaternary ammonium group and preparation method and application of polymeric antibacterial agent

The invention provides an annular halamine type polymeric antibacterial agent containing quaternary ammonium group and preparation method and application of the polymeric antibacterial agent. The preparation method includes: synthesizing an annular micromolecular halamine type polymeric antibacterial agent precursor and a polymeric autopolymer; enabling the precursor and the polymeric autopolymer to be in substitution reaction to obtain a polymeric antibacterial agent precursor; halogenating to obtain the annular halamine type polymeric antibacterial agent. The application includes: dissolving the polymeric antibacterial agent precursor in N, N-dimethyl formamide, and mixing with a base material; adopting electrostatic spinning technology or conventional casting dissolving process to obtain a membrane containing the antibacterial agent precursor; soaking the membrane in a solution containing active halogen for halogenating reaction; taking the membrane out for water washing, and drying to obtain an antibacterial material. The preparation method is mild in reaction condition, raw materials are low in cost and easy to get, production cost is low, equipment is simple and convenient, and process operation is simple; the antibacterial agent prepared by the method has excellent antibacterial performance and is stable, safe and nontoxic.
Owner:JIANGNAN UNIV

Insulated impregnating process for high-frequency transformers

The invention discloses an insulated impregnating process for high-frequency transformers. The method can significantly improve the surface quality of high-frequency transformers and ensure that the surface of a transformer is completely covered; gaps between iron cores and windings are completely filled; and paint layers are glossy and free from paint protrusions, wrinkled skin and large-area flowing paint. The process is implemented through a technical scheme comprising the following: a) a step of impregnating with paint, which is to impregnate an iron core component with high-temperature epoxy glue, put the iron core component into a sealed container and bake for 2 hours; b) a step of winding, which is to wrap the iron core component in a glass cloth belt for insulation, wind primary and secondary windings and tie the glass cloth belt for insulation; c) a step of impregnating with paint, which is to bake the obtained product at 70+ / -10 DEG C for 0.5 hour; d) a step of baking, whichis to put the obtained product into a vacuum tank, vacuumize the vacuum tank, maintain pressure for 10 minutes, raise pressure to normal pressure, pressurize to between 0.3 and 0.4 MPa, maintain pressure for 20 minutes and bake for 2 hours; and e) a step of packaging, which is to pour high-temperature epoxy glue and put the obtained product into the same sealed container for baking. The high-frequency transformers manufactured by the process have the advantages of good thermal stability, excellent insulation performance and capability of completing the boost output of high-energy pulses.
Owner:四川泛华航空仪表电器有限公司

Multiferroic liquid and preparation method thereof

ActiveCN105006329AChange lengthChange the length and thicknessMagnetic liquidsMagnetoAcoustic property
The invention discloses a multiferroic liquid and a preparation method thereof, for solving the defects that a solid-state multiferroic material is large in coercive force, cannot be structurally changed once being formed, is low in magneto-electric coupling effect and is easily broken down by voltages. The multiferroic liquid is internally provided with a magnetic material, the outer surface of the magnetic material is wrapped by a ferroelectric material, nanometer particles with magneto-electric core shell structures are uniformly dispersed in a mixed liquid of a base solution and a surfactant, and a stable suspending liquid is formed in such a way. The multiferroic liquid has ferroelectricity and magnetism, also has fluidity and is quite small in coercive force. The length and the thickness of a nanometer chain composed of the nanometer particles in the multiferroic liquid can be adjsuted by applying different electric fields or magnetic fields to the multiferroic liquid according to needs, and accordingly, the electrical property, the magnetic property, the hydrodynamic property, the optical property and the acoustic property of the multiferroic liquid are adjusted. The invention brings forward the concept of the multiferroic liquid for the first time ever, and also provides the preparation method, expanding a new research direction for research on a multiferroic material.
Owner:嘉兴鼎尚信息科技有限公司

Solution for preparing high corrosion resistance self-sealing ceramic coating on magnesium alloy surface and its application

The invention relates to the technology for treating a magnesium alloy surface, in particular to a solution for preparing a self-hole-sealing ceramic coating with high corrosion resistance on the magnesium alloy surface and application thereof. The solution consists of the following components: 8-10g/L of fluozirconate, 8-14 g/L of dihydric phosphate, 15-20 g/L of fluoride, 3-8 g/L of citrate, 70-90 g/L of hexamethylene tetramine and the balance of water. In a constant-current constant-voltage working manner, the self-hole-sealing ceramic coating with high corrosion resistance is prepared on the magnesium alloy surface by adopting a microarc oxidation technology. The invention can overcome the disadvantages that the peak current density is too high when magnesium alloy workpieces in a fluozirconate-containing solution are subjected to the microarc oxidation treatment by adopting the constant-voltage working manner, and the film cannot be formed when the constant-current working manneris adopted in the prior art. The ceramic coating has better corrosion resistance, and the coating has uniform thickness, compactness and low surface roughness and does not need after-treatments such as hole sealing and the like; and the solution provided by the invention has simple components and readily available raw materials and is applicable to industrialization production.
Owner:INST OF METAL RESEARCH - CHINESE ACAD OF SCI

Long-lasting anti-fouling membranous-structure composite canopy material

The invention relates to a long-lasting anti-fouling membranous-structure composite canopy material comprising a base membrane, base cloth and a surface membrane which are arranged sequentially from bottom to top, wherein a polyvinylidene fluoride coating is arranged on the surface membrane and is subjected to mirror face embossing treatment; the surface membrane as well as the base membrane is prepared from the following raw materials in parts by weight: 100 parts of polyvinyl chloride (PVC) resin powder, 50 to 70 parts of a dioctyl terephthalate plasticizer, 5 to 25 parts of calcium carbonate powder, 1 to 5 parts of a flame retardant, 1 to 4 parts of a smoke suppressant, 1 to 6 parts of a barium-zinc stabilizer and 1 to 5 parts of a titanium pigment; the base cloth is 1000D*1000D polyester fiber woven cloth. Raw materials such as PVC resin powder, the plasticizer, calcium carbonate, the stabilizer and the flame retardant are mixed, plasticizing and calendaring are carried out to obtain soft membranes, then the soft membranes are compounded with the 1000D*1000D polyester fiber woven cloth, and embossing is carried out after surface treatment of polyvinylidene fluoride, so that the long-lasting anti-fouling membranous-structure composite canopy material is a membranous-structure composite canopy material being long-lasting in fouling resistance, efficient in fire retardancy, and high in strength.
Owner:浙江明士达股份有限公司

Production technology for transient voltage suppressor chip with channeling effect

The invention provides a production technology for a transient voltage suppressor chip with the channeling effect. By means of the steps of gaseous state source diffusion, channel corrosion and double-faced electrophoresis, in the reverse state, the width of depletion layers and the reverse voltage of the high-voltage transient voltage suppressor chip which is of the N+PN+ structure are increased along with the increase of a reverse current, when the reverse current is increased to be close to Ic, the depletion layers on the two faces make contact with each other, the channeling effect is produced, the equivalent resistance is reduced, the clamp voltage is reduced, the reverse surge capacity is improved, the reliability of a diode is improved, the service life of the diode is prolonged, and the transient voltage suppressor chip has the advantages of being good in electrical parameter uniformity, better in ohmic contact and high in reliability, the problem that the thicknesses of two glass layers are uneven due to two times of single-face electrophoresis is avoided, the glass is high in stress-resisting capability of protection and not prone to damage, and the reliability of the transient voltage suppressor chip is further improved.
Owner:TIANJIN ZHONGHUAN SEMICON CO LTD

Printing ink printing method and capacitive type touch screen laser etching technology

The invention relates to the technical field of touch screens, and provides a printing ink printing method. The method comprises the following steps that firstly, a cover plate is printed with white printing ink, at least the binding area of the cover plate is printed with a white printing ink layer, and the thickness of the white printing ink layer printed on the binding layer ranges from 8 microns to 16 microns; secondly, the white printing ink layer on the cover plate is baked and solidified. The invention further provides a capacitive type touch screen laser etching technology. The technology comprises the printing ink printing procedure in the printing ink printing method, the ITO coating procedure, the laser etching procedure, the frame printing ink supplement printing procedure, the binding procedure and the pasting procedure. Compared with the prior art, the printing ink printing method has the advantage that the printing ink on the binding area can be prevented from disengaging. According to the capacitive type touch screen laser etching technology, the printing ink is prevented from being subjected to the laser in the laser etching procedure, and the yield of a capacitive touch screen is improved.
Owner:SHENZHEN YUSHUN IND INTELLIGENT TECH CO LTD +1

Method for preparing LaB6/Si-Mo gradient high-temperature anti-oxidation coating

The invention relates to a method for preparing a LaB6 / Si-Mo gradient high-temperature anti-oxidation coating. According to the method, a SiC internal coating is prepared on the surface of a C / C composite material to relieve the problem of concentrated thermal stress caused by thermal expansion coefficient difference between a matrix and the coating; the intermediate layer is a SiC-MoSi2 transition coating and serves as a transition layer of internal and external coatings, cracks, pores and other defects of the external coating generated under a high-temperature condition can be effectively reduced, the excellent high-temperature oxidation resistance of the coating can be achieved, and the resistance adaptability of the C / C composite material under high-temperature aerobic relieving condition is further improved; the LaB6 / Si-Mo coating is prepared by utilizing a plasma spraying method, so that the thickness of the coating can be accurately controlled, and the problem of uneven thickness of the coating is solved. Gradient is sequentially formed among the coatings, so that generation of thermal stress is reduced, and the binding force among the coatings is improved. Advantages of the plasma spraying method and an embedding method are combined, so that the high-temperature oxidation resistance of the coating can be greatly improved.
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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