53results about How to "Improve the effect of surface treatment" patented technology

An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following inequality (1): lambda, / lambda ) . . ., where lambda is the shortest wavelength of the incoming light ray, theta i is the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, lambda is the period of the uneven surface pattern in the x direction, and lambda is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.

A preparing method of a ceramic-filled polytetrafluoroethylene microwave composite-medium substrate is disclosed. The method includes 1) adding silicon dioxide ceramic powder into a liquid mixture of hydrogen peroxide and concentrated hydrochloric acid after the silicon dioxide ceramic powder is dried, and heating the mixture to 50-70 DEG C to obtain a suspension; 2) subjecting the suspension to suction filtration and drying a product in a vacuum environment; 3) adding the silicon dioxide ceramic powder obtained in the step 2) into a solution mixture of deionized water and absolute alcohol, adjusting the pH value to be 3-5, weighing a coupling agent the weight of which is 1.0-2.5% of the weight of the silicon dioxide ceramic powder, performing ball milling, and fully mixing the mixture to obtain a material mixture; 4) filtering and drying the material mixture to obtain modified silicon dioxide ceramic powder; 5) ball-milling and mixing the modified silicon dioxide powder, chopped glass fibers and polytetrafluoroethylene, and then performing demulsification to obtain dough; and 6) subjecting the dough to molding and hot-pressed sintering. The ceramic-filled material prepared by the method has a low dielectric constant (with epsilon being equal to 2.94), ultralow dielectric loss (with tg[delta] being less than 0.0008, 10 GHz), low water absorption (less than 0.02%) and a small thermal expansion coefficient (less than 20 ppm / DEG C).

An antireflective member according to the present invention has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following inequality (1): lambda, / lambda ) . . ., where lambda is the shortest wavelength of the incoming light ray, theta i is the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, lambda is the period of the uneven surface pattern in the x direction, and lambda is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.

The invention relates to a method for improving the corrosion resistance and fatigue resistance of an aluminum alloy, comprising: shot peening, determining the depth of a residual compressive stress layer, cleaning, alkali corrosion, pickling, anodizing, and sealing, wherein, after determining the residual compressive stress In the layer depth step, based on the relationship between the shot peening intensity parameter and the residual compressive stress layer depth, the residual compressive stress layer depth Ds is obtained from the preset shot peening intensity parameter. In the alkali corrosion step, according to the alkali corrosion depth Dc and There is an optimal coefficient Y between the depths of the residual compressive stress layer Ds, and the alkali corrosion depth is determined as Dc=Y·Ds. According to the corresponding relationship between the alkali corrosion depth Dc and the alkali corrosion time t, the linear fitting curve Dc=f(t) is established, The corresponding corrosion time is calculated from the depth Ds of the residual compressive stress layer. The method can effectively improve the surface treatment performance of aluminum alloy parts, improve the comprehensive performance of the parts, and then improve the quality and performance of equipment, and has great economic and social benefits.

The invention discloses a surface treatment process for a cylindrical plastic container. According to the process, a high-frequency high-voltage device is used for performing surface treatment on the plastic container through electrode discharging, the distance between an electrode and the plastic container to be treated is 1.5 m, the surface of the plastic container to be treated is coated with UV (ultraviolet) ink, and a UV radiation lamp is arranged for irradiation during treatment. According to the process, defects in the prior art are overcome, the electrode is a double-end electrode, the thickness of the electrode is increased, and 2-4 shallow grooves are formed in a knife edge of the electrode, so that arcs produced by the electrode are needle-shaped arcs, the surface treatment effect is improved, the treatment speed is 150 pieces per second, and the treatment efficiency is improved; and the UV radiation lamp is added during treatment, so that the treatment effect is improved.

The invention discloses a magnesium-lithium alloy surface treatment device, which aims to make the magnesium-lithium alloy in the process of chemical conversion uniform conversion film, and no corrosion spots appear when tested by a salt spray test. The technical scheme adopted is: comprising: The treatment tank is used for placing the treatment liquid. The bottom of the treatment tank is provided with a number of liquid spray holes. The liquid spray holes are connected to the variable frequency pump through the liquid channel arranged at the bottom of the treatment tank. The variable frequency pump is connected to the treatment liquid source. The control end of the pump is connected to the controller, the side wall of the processing tank is provided with a position sensor, and the position sensor is connected to the controller; when the magnesium-lithium alloy workpiece is processed, the processing liquid is sprayed through the liquid spray hole to make the magnesium-lithium alloy work. The alloy workpiece is suspended in the treatment liquid, and the position sensor detects the position change information of the magnesium-lithium alloy workpiece and feeds it back to the controller. The controller adjusts the outlet pressure of the variable frequency pump according to the position change information, so that the magnesium-lithium alloy workpiece can be stably suspended in the treatment liquid. in liquid.