46results about How to "Change surface state" patented technology

The invention discloses a preparation method of an electrolytic solution for micro-arc oxidation on the surface of a magnesium alloy and a black coating. The electrolytic solution includes a main film-forming agent, an auxiliary film-forming agent, a main coloring salt, a complexing agent and deionized water; the main coloring salt is metal copper salt; the complexing agent is composed of polycondensed phosphate, organic phosphonate and tartrate; and in the electrolyte solution, the content of the main film-forming agent is 5~50 g / L; the content of the auxiliary film-forming agent is 1~ 30 g / L; the content of the main coloring salt is 1~20 g / L; the content of various complexing agents can be compounded at 1~20 g / L. The electrolyte solution is not easy to produce precipitation in the micro-arc oxidation process, has high stability, and has a long service life; the electrical parameters can also be adjusted in a wide range, and extreme discharge is not easy to occur, and the film forming efficiency is high; and the electrolyte solution is used The prepared black coating has high blackness, slight color difference, low surface roughness, high hardness, good corrosion resistance, strong adhesion, is not easy to decolorize, and has excellent thermal control performance.

A method for chemically and roughly treating a quartz surface overcomes the defects of the prior art in which the treatment to the quartz surface easily leads to damage and influences the size accuracy of the quartz product. The method is as below: at a normal temperature and a normal pressure, immersing a quartz product into a container filled with a treating fluid so as to undergo reaction after the surface of the quartz product is polished, taking out the quartz product after two-hour reaction, and immersing the quartz product into the treating fluid again so as to repeat the preceding reaction till the roughness Ra of the surface of the quartz product is equal to 1.5 micrometers to 4.5 micrometers after attachments on the surface of the quartz product is eliminated with deionized water. The treatment process has reasonable design, involves simple devices and is easy to be operated, and the obtained quartz product has uniform surface roughness which is free from the influence of the shape. During the participation in the CVD reaction, the crazing and the shedding of a deposited film on the quartz surface is effectively reduced so as to reduce the possibility of pollution to thereaction cavity, to remarkably improve the finished product rate and the production efficiency, and then further to prolong the service life of the quartz product, save time, reduce consumption and reduce production cost.

This invention discloses a burr metal strip collector and its usage in a super capacitor, in which, a flexible active carbon plate is adhered on said burr metal foil with the thickness of 0.05~0.2mm and burr round hole or square hole in the gap of 0.5~2.0mm by vertical pressing or rolling to process an electrode of a super capacitor to increase the loading volume of the active carbon and alter the surface state of a collector.

The invention provides a high-temperature-resistant and high-humidity-resistant fluoride red fluorescent powder and a preparation method thereof. The fluorescent powder has a general chemical formula of KmAnM1-xF6: xMn<4+>. In the general chemical formula, A is one or two selected from the group consisting of Cu, Ba and Zn; M is at least one selected from the group consisting of Ti, Si and Ge; m + 2n are equal to 2; n is no less than 0.05 and no more than 0.2; m is no less than 1.6 and no more than 1.9; x is more than 0 and less than 0.2; and the surface of the fluorescent powder is coated with a mixture of potassium silicate, carboxymethyl cellulose sodium and polyethylene glycol. The fluorescent powder provided by the invention can be effectively excited by light with the excitation wavelength being in a range of 300 to 500 nm, so red light with a peak wavelength of 610 to 650 nm and a half-peak breadth of only 2 to 9 nm is generated, and high color purity is obtained. The preparation method provided by the invention has simple flow, can prepare target products at low temperature and under normal pressure, and facilitates to large-scale industrial production; and a special coating technology is adopted in the invention, and a coating reagent is utilized to change the surface state of fluorescent powder particles, so the problem of agglomeration of solid particles can be effectively solved, and a fluorescent powder product with good dispersion properties and high-temperature-resistant and high-humidity-resistant performances can be obtained.

The invention discloses a method for preparing cobalt-doped zinc oxide nanorods through sol-gel. The method comprises the steps of dissolving dihydrate zinc acetate and tetrahydrate cobaltous acetate into ethylene glycol monomethyl ether according to the stoichiometric ratio of Zn<1-x>Co<x>O, stirring the mixture uniformly, and obtaining a mixed solution; dropwise adding ethanolamine to the mixed solution, conducting a reaction under the condition that the mixture is stirred at the temperature of 60-80 DEG C, cooling the mixture naturally to the room temperature after the reaction is ended, and obtaining clear cobalt-doped zinc oxide precursor sol; drying the clear cobalt-doped zinc oxide precursor sol, obtaining dried gel, then making the dried gel be subjected to a heat treatment process in the air atmosphere, and obtaining the clear cobalt-doped zinc oxide nanorods. According to the method, the cobalt-doped zinc oxide nanorods are prepared through a multicomponent uniform reaction sol-gel method, and the method has the advantages that the process is simple, the reaction temperature is low, the cost is low, the test process is easy to control, the product crystallinity degree is high, and the crystalline phase is pure, and the obtained clear cobalt-doped zinc oxide nanorods have ferromagnetism at the room temperature.

The invention relates to the slab lattice of high-energy accumulator made of the composite nanometer carbon tube. The ingredient of the slab lattice includes nanometer carbon tube, carbon fiber and silicon nitride. With the said ingredient being mixed and with 107 floor glue being added and mixed evently, die stamping the said mixed material obtains the roughts. The agglutinated slab lattices areobtained by heat drying, agglutinating the roughs then cooling down the roughs slowly. Lead plaster in 3 days screen mesh is coated on the slab lattice. After 20-25 hours, the slab lattice can be used to assemble the accumulator.