3results about How to "Long protection time" patented technology

The present invention relates to an anti-sputtering mechanism for a 3D laser printer, comprising: an exhaust part, which is arranged in a cylindrical base and connected to an inert gas delivery pipe, a laser printing head is arranged in the cylindrical base, and the cylindrical base is arranged on a moving mechanism of the 3D laser printer; an air curtain part, which is arranged on the periphery of a printing platform, and the exhaust part is placed on the periphery of the laser printing head to discharge inert gas in a circular trajectory, so as to specifically distinguish a temporary printing area from a non-printing area, the exhaust part can move in real time with the laser printing head, so that the printing process of the targeted printing area starts protection work, and the sparks formed in the printing process of the printing area are disturbed by the inert gas on the circumference and extinguished, so as to avoid affecting the adjacent printing area; and the air curtain part can form an air curtain around the printing platform to block the diffusion of the inert gas, so as to extend the protection time and ensure the high efficiency and continuity of the protection work.

This invention relates to the fields of modified graphene technology and anti-corrosion materials technology, specifically to a modified graphene material and its preparation method, an anti-corrosion coating and its preparation method and application, and an anti-corrosion coating and its application. The modified graphene material includes graphene oxide and ammonium phytate grafted onto the surface of graphene oxide via amide bonds. The structural formula of the ammonium phytate is shown in formula (I). In formula (I), * represents the N-linked site in the amide bond; R1 is selected from one of the groups formed by removing two terminal amine groups from a C2-C10 alkylene group or an n-ethylene(n+1)amine, where n is an integer and 2≤n≤6. The modified graphene of this invention has the advantages of strong dispersibility in water-based coatings and strong adhesion to metal substrates. When applied to water-based anti-corrosion coating resins, it improves the adhesion, high barrier properties, and corrosion resistance of the coating.

The invention relates to a ceramic-based composite material with water and oxygen corrosion resistance and high heat insulation performance and a preparation method thereof. The method comprises the following steps: primarily densifying a porous ceramic-based composite material by using a PCS solution as an impregnation liquid through a PIP process; the preparation method comprises the following steps: preparing n gradient concentration steeping liquor which contains a solid component A, a solid component B and a PCS solution, densifying the preliminarily densified ceramic matrix composite material by using the n gradient concentration steeping liquor through a PIP process to obtain the ceramic matrix composite material of which the surface layer contains the solid component A and the solid component B, the content of the solid component A in the surface layer is in a decreasing trend, and the content of the solid component B in the surface layer is in a decreasing trend. The content of the solid component B is gradually increased in the surface layer; and then putting the mixture into silicon dioxide to carry out infiltration reaction to prepare the ceramic-based composite material. The prepared ceramic-based composite material has water-oxygen corrosion resistance and high heat insulation performance, the water-oxygen corrosion resistance and high heat insulation component bonding strength is higher, the protection effect is better, and the service life is longer.