3results about How to "Wrapped" patented technology

The utility model discloses a wave trap, including shell and be located in the inner shell of shell, fixedly connected with inner core and inductance coil on the inner shell, be equipped with the aperture unit for fixing inner core and inductance coil on the inner shell, form the cambered surface unit between aperture unit and the outer wall of inner shell, and aperture unit extends to the inside of inner shell and forms the convex unit, and aperture unit intercommunication cambered surface unit and convex unit. The utility model discloses reasonable structure design, and the aperture of inner shell side surface and bottom surface all adopt non - material punching process, and the aperture around convex circle forms convex unit, increases the interface of the component of interface, and the cambered surface unit is formed to the outside of aperture, forms the tin dissolving groove, makes tin not to flow to other position, guarantees that tin and the interface of component are covered well, thereby guarantees that the welding is good, and it is not easy to appear the phenomenon of false welding.

The invention discloses a simple and convenient preparation method of low-resistance and high-oxidation-resistance silver-coated and nickel-coated copper powder. The simple and convenient preparation method comprises the following steps: firstly, carrying out surface pretreatment on copper powder; mixing the pretreated copper powder with a dispersing agent, a sodium citrate complexing agent and a nickel salt solution to obtain a copper powder precursor solution; the method comprises the following steps: slowly dripping a reducing agent hydrazine hydrate into a copper powder precursor solution for reaction to obtain a nickel-coated copper solution; mixing the silver salt solution with a complexing agent, and dropwise adding the mixture into the nickel-coated copper solution; and washing and drying the obtained solid product to obtain the silver-coated nickel-coated copper powder. The silver-coated and nickel-coated copper powder is prepared by adopting a one-pot method, and the operation process is simple; in the silver layer forming process, the complexing agent L-histidine plays a role in integrating stable complexing, fast transfer and slow reduction, complexing silver ions alleviate the reduction rate and are directionally transferred and adsorbed to the nickel-coated copper surface, and therefore the prepared silver-coated nickel-coated copper powder has excellent conductivity and oxidation resistance.

The invention relates to the technical field of composite materials, in particular to a straw-plastic composite material and a preparation method thereof. The invention aims to solve the problems of poor mechanical property and poor water resistance of the existing straw-plastic composite material. Through compounding of the rape straw skin powder, the bamboo sawdust powder and the polymer, the load bearing capacity, the rigidity, the bending strength and the bending resistance of the straw-plastic composite material are remarkably improved; meanwhile, the uniformity and orderliness of the straw-plastic composite are improved, the tensile strength and the tensile modulus are increased, and the tensile property is further improved; by adjusting the ratio of MgO to MgSO4 in the magnesium oxysulfate cement, the addition amount of calcium carbonate and the variety of the coupling agent, the density of the straw-plastic composite material and the compactness of the internal structure are enhanced, and the axial tensile mechanical property of the straw-plastic composite material is further improved; the preparation process and the extrusion molding process are improved, the proportion of the composite foaming agent and the extrusion molding temperature are adjusted, the foam structure of the straw-plastic composite material is optimized, and the prepared straw-plastic composite material has the characteristics of high mechanical property and good water resistance.