35results about How to "Coating thickness is thin" patented technology

A substrate is provided with an abrasion resistance antireflection coating. The coated substrate includes a multilayer antireflection coating on at least one side. The coating has layers with different refractive indices, wherein higher refractive index layers alternate with lower refractive index layers. The layers having a lower refractive index are formed of silicon oxide with a proportion of aluminum, with a ratio of the amounts of aluminum to silicon is greater than 0.05, preferably greater than 0.08, but with the amount of silicon predominant relative to the amount of aluminum. The layers having a higher refractive index include a silicide, an oxide, or a nitride.

The invention relates to the field of thermal interface materials, and more particularly, provides a thermal grease composition, which contains the following components: (A) 100.0 parts by weight of thermally conductive filler, (B) 0.1 to 8.0 parts by weight of active solid silicone resin, (C) 0.1 to 15.0 parts by weight of active silicone oil, (D) 0.1 to 9.0 parts by weight of macromolecular polysiloxane, (E) 0.1 to 3.0 parts by weight of nano catalyst, and (F) 0.1 to 3.0 parts by weight of additive. The thermal grease composition provided by the invention has good thermal conductivity and using weatherability, can effectively solve the technical difficulty that the thermal grease composition in the prior art is pulverized and crushed and the thermal conductivity is therefore reduced as the service time increases. The manufacturing process has simple, convenient and easy steps and the thermal grease composition is suitable for large-scale match production.

A broad band cholesteric liquid crystal film of the present invention is a cholesteric liquid crystal film obtained by coating a liquid crystal mixture containing a polymerizable mesogen compound (a), a polymerizable chiral agent (b) and a photoisomerizable material (c) on a substrate to ultraviolet polymerize a coat of the liquid crystal mixture, and has a reflection bandwidth of 200 nm or more. A broad band cholesteric liquid crystal film of the present invention has a broad reflection band, is of a thin type and can be manufactured in less of manufacturing steps.

The invention relates to a graphene-based composite negative electrode material and a preparation method thereof, and belongs to the field of a lithium ion battery. The preparation method of the graphene-based composite negative electrode material comprises the steps of (1) sequentially adding hydrogen peroxide, a nitrogen doping agent and silicate ester into a graphene oxide dispersion liquid to obtain a mixed solution; (2) performing hydrothermal reaction on the mixed solution in the step (1), performing solid-liquid separation, drying and pressing the obtained solid, and performing carbonization in an inert gas atmosphere to obtain a nitrogen-doped graphene and silicon dioxide composite material; and (3) adding the nitrogen-doped graphene and silicon dioxide composite material in the step (2) into a mixed solution of polyvinylpyrrolidone and a conductive macromolecular polymer, adding a reducing agent, and performing reaction for 1-6 hours under 50-120 DEG C to prepare the graphene-based composite negative electrode material. The graphene-based composite negative electrode material prepared by the method is high in specific capacity, stable in structure and excellent in electrochemical performance, and has a wide prospect in the field of a lithium ion battery negative electrode material.

The present invention provides a carbon nanofiber-metal composite, which is formed by continuously coating a carbon nanofiber including a plurality of laminated truncated, conic graphenes with a metal. The carbon nanofiber-metal composite according to the present invention can have improved magnetic permeability and conductivity, and thus can be useful as an electromagnetic shielding material.

The present invention belongs to the field of biomedical material, and is particularly related to a method of preparing bioactive glass coatings by liquid precursor thermal spray. The objective of the present invention is to overcome the shortcomings of the air plasma spraying where the powder feedstock preparation is complicated and time-consuming, and sol-gel or other wet chemistry method where the synthesized coating generally has thin coating thickness and with low production efficiency. Therefore, a new method is provided for preparation of bioactive glass coatings. In this method, organic and inorganic raw materials were first weighed in accordance with the chemical composition of bioactive glasses, and sol or suspension was prepared; then the sol or suspension was used as the feedstock for thermal spray, and was deposited on the biomedical materials substrate, at high temperature to form the bioactive glass coating. The invention possesses the following advantages: simple operation, less complicated procedures, synthesis with high efficiency, low production cost, suitable for industrial production, and so on. This method can be used to prepare bioactive glass coatings.

The invention belongs to the technical field of clad steel sheet production, particularly relates to a hot-dipped aluminum-zinc alloy steel plate and a preparation method thereof. Aiming at the problems that the hot-dipped aluminum-zinc alloy steel plate produced through the prior art has poor strength, low coating quality and high cost, the invention provides the hot-dipped aluminum-zinc alloy steel plate, and the base material of the steel plate consists of the following components according to weight percentage, 0. 15-0.20% of C, less than or equal to 0.07% of Si, 0.2-0.5% of Mn, 0.02-0.05% of P, less than or equal to 0.015% of S, 0.04-0.06% of Ti, 0.020-0.070% of Al, and the balance of Fe and unavoidable impurities; the preparation method includes the following steps: smelting, hot rolling, cold rolling, cleaning, annealing, hot dipping aluminum-zinc, cooling after hot dipping, finishing, tension levelling, surface treating, greasing, rolling, and getting a product; the heating temperature of a slab during hot rolling is 1230-1260 DEG C and the time in a furnace is 180-300 min; the finish rolling temperature of hot rolling is 840-900 DEG C; the annealing temperature is 720-780 DEG C, and the annealing time is 45-85 s; and the rolling temperature is 580-640 DEG C. The alloy steel plate disclosed by the invention is high in strength, high in ductility, low in coating thickness, uniform and compact in zinc spangle, and high in quality.

Aiming at the physiological characteristics of ruminants, in order to solve the problems of digestion and inactivation of the egg yolk antibody in the rumen, the invention creatively provides two preparation modes, one is an intestinal preparation which can prevent the egg yolk antibody from passing through the rumen, and research shows that after the intestinal preparation is applied to calves, the intestinal preparation has a treatment effect on calf diarrhea caused by BEV infection, and the intestinal preparation can be used for treating the diarrhea of the calves caused by BEV infection. The effect is close to that of a traditional drug therapy, but compared with an antibiotic therapy, the method is more environment-friendly and safer; the other one is a rumen bypass preparation which can be added as a part of daily ration concentrate and is convenient to use, after the egg yolk antibody is prepared into the rumen bypass preparation, the egg yolk antibody can be prevented from being degraded in the rumen and released in the intestinal tract at a fixed point, and the treatment effect on diarrhea caused by BEV infection is achieved.

The invention discloses a drying method for a lost foam, and the drying method comprises the following steps of: step 1, sending a coated foam mold to a coating drying room, and pre-drying the coatedfoam mold under the condition of circulating hot air, wherein the temperature of the circulating hot air is 30-35 DEG C, the wind speed is 1.5M/S-2.5M/S, the wind pressure is 0.1Pa-0.6Pa, the humidityof the drying room is 30%-35%, and the drying time is 2h-3h; step 2, sending the foam mold pre-dried in the step 1 to a stokehold drying room, and drying the foam mold under the condition of the circulating hot air, wherein the temperature of the circulating hot air is 30-50 DEG C, the wind speed is 0.5M/S-1.5M/S, the wind pressure is 0.1Pa-0.6Pa, the humidity of the drying room is 15%-20%, and the drying time is 6h-8h. The invention further discloses a preparation method for the lost foam. The invention has the organic combination of realizing the humidity, the flow of air and the temperature, prevents the saturated water vapor in the coating from being in an expanded state, and the water loss outside the coating being dried and shrunk quickly to cause the phenomenon of coating cracking.

The invention relates to the technical field of polypropylene resin materials, in particular to high melt strength polypropylene resin containing a long-chain branch structure, which comprises the following components by weight percentage: 68 percent to 89 percent of polypropylene, 10 percent to 30 percent of macromonomer with peroxy groups, 0.5 percent to 1.5 percent of graft accelerators and additives of the rest. All the components are added into a high-speed mixer to stir and mix evenly, are fed into a double screw extruder with 36:1 to 48:1 L/D to carry out the melt grafting reaction, and are extruded out for granulation after the reaction is completed. The high melt strength polypropylene resin solves the problem of the difficult hot forming of the ordinary polypropylene resin, has higher crystallization temperature, shorter crystallization time and wider processing temperature range, the process is easy to master, thereby hot forming parts are allowed to demolded under a higher temperature to shorten the forming cycle. The high melt strength polypropylene resin can be molded on ordinary hot forming equipment into thin-walled pressure vessels with large draw ratio and uniform vessel wall.

The invention discloses a preparation method for polyamide acid resin and a preparation method for a double-sided flexible copper-clad plate. The preparation method for the polyamide acid resin is asfollows: under the protection of nitrogen, aromatic diamine monomer is dissolved into an aprotic polar solvent, and after stirring for dissolution at 25 DEG C to 50 DEG C, an aromatic diamine monomersolution with the mass concentration of 6 to 9 percent is obtained; after being cooled to 0 DEG C to 25 DEG C, the aromatic diamine monomer solution is added with an aromatic dianhydride monomer, wherein the molar ratio of the aromatic diamine monomer to the aromatic dianhydride monomer is (1:0.95) to (1:1.05), and after 6 to 10 hours of polymerization reaction, standing for defoaming is carried out, so that the polyamide acid resin is obtained. The invention further discloses the method for preparing the double-sided flexible copper-clad plate by utilizing the polyamide acid resin. Accordingto the invention, the reaction for preparing the polyamide acid resin is simple and controllable, and the polyamide acid resin has excellent heat resistance and chemical resistance; and the prepared double-sided flexible copper-clad plate has good heat resistance, high dimensional stability and excellent chemical resistance, and properties such as peel strength and elongation are excellent.

The invention relates to a spindle motor, preferably for driving a hard disk drive, having a stationary motor component and a rotatable motor component that is rotatably supported with respect to the stationary motor component and that is driven by an electromagnetic drive system, at least one storage disk being fixed to the rotatable motor component using some means of mounting and fastening. According to the invention, at least parts of the rotatable motor component and at least parts of the means of mounting and fastening have a wear resistant surface coating or are subjected to a wear resistant surface treatment.

The present invention relates to the field of graphene metal composite materials, and discloses a graphene metal composite film and a preparation method thereof. The method comprises: (1) mixing graphite and a liquid-phase medium, and mechanically stripping to obtain a mixture containing graphite and graphene; (2) carrying out centrifugal separation on the mixture containing graphite and graphene, and collecting the graphene-containing supernatant; and (3) optionally drying the graphene-containing supernatant, mixing with a binder to obtain a mixed solution containing the graphene and the binder, and coating the mixed solution onto a metal substrate. According to the present invention, the graphene metal composite film prepared by using the method has advantages of thin coating thickness and low coating resistance, wherein the thickness of the electric conduction coating can be as thin as 0.2 [mu]m and the coating resistance can be as low as 2.2*10<-6>omega.cm through the following embodiment; and the method is simple and easy to perform, has the low cost, and is suitable for popularization and application.

A separator comprising a crosslinked polyolefin substrate having a plurality of pores and an inorganic coating layer having internal pores formed on at least one surface of the crosslinked polyolefin substrate. The inorganic coating layer on the at least one surface of the crosslinked polyolefin substrate has internal pores formed by an immersion phase separation method, and a high power secondary battery including the same.