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

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 the reaction 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.

TiO2 Nano grains with size less than and equal to 2nm are formed on surface of TiO2 Nano grain with size larger than 10 nm through chemical deposition method, thus surface state of TiO2 Nano grain is changed. Number of unsaturated titanium atoms is much more than number of TiO2 Nano grain with large size. The said changed surface state of TiO2 Nano grain possesses better characteristic of chemical adsorption so as to increase proportion of chemical adsorption of dye molecule on surface of Nano crystal. Result is to raise opto-electronic conversion efficiency of battery of TiO2 Nano crystal.

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 discloses a compound coated slow-release fertilizer for garden planting. The compound coated slow-release fertilizer comprises kernel fertilizers, inner-layer coating materials and outer-layer coating materials. The inner-layer coating materials wrap the surfaces of the kernel fertilizers, and the outer-layer coating materials wrap the surfaces of the inner-layer coating materials; urea, diammonium phosphate, potassium sulfate and grass carbon are mixed with one another to obtain the kernel fertilizers; a process for preparing the inner-layer coating materials include uniformly mixing corn starch and water with each other to obtain first mixtures, adding hydrogen peroxide and sodium hydroxide solution A into the first mixtures to obtain second mixtures, heating the second mixtures, then preserving heat of the second mixtures, adding sodium bisulfite solution into the second mixtures to obtain third mixtures, cooling the third mixtures, adding epichlorohydrin into the third mixtures to obtain fourth mixtures, dropwise adding sodium hydroxide solution B into the fourth mixtures to obtain fifth mixtures, carrying out constant-temperature reaction on the fifth mixtures and cooling reaction products until the temperatures of the reaction products reach the room temperature to obtain the inner-layer coating materials. The invention further discloses a method for preparing the compound coated slow-release fertilizer for garden planting. The compound coated slow-release fertilizer and the method have the advantages that the slow-release fertilizer prepared by the aid of the method is excellent in fertilizer efficiency slow-release and waterproof property, free of biological toxicity, good in film-forming ability and high in cohesiveness, and growth of garden crops can be promoted.

The invention discloses a transistor type formaldehyde sensor and a manufacturing method thereof. The transistor type formaldehyde sensor comprises a substrate, a gate electrode arranged on the substrate, a dielectric layer arranged on the gate electrode, a composite film arranged on the dielectric layer, a source electrode and a drain electrode arranged on the composite film, wherein the composite film is a zinc oxide film onto which the metal nanoparticles are adsorbed. The transistor type formaldehyde sensor provided by the invention has specific selectivity for formaldehyde and strong anti-interference performance, and solves the problem that the stability and selectivity of the formaldehyde sensor are poor in the prior art.

The invention discloses a humic acid fertilizer composition and application thereof, and a humic acid soluble fertilizer and application thereof. The humic acid fertilizer composition comprises, by weight, 4-10 parts of potassium fulvic acid, 0.4-20 parts of sugar alcohol and 4-12 parts of organic potassium acid. The technical threshold of application of the humic acid fertilizer is reduced, fertilization mode is simplified, and safety and convenience in agricultural production are both guaranteed. With synergistic effect of the humic acid fertilizer composition, growth of plant roots is improved, content of vitamin C and soluble sugar is increased, yield and quality of plants are both increased, and yield increasing effect keeps stable.

The invention discloses a surface modified perovskite catalyst as well as a preparation method and application thereof, wherein hydrogen peroxide is used for treating the prepared perovskite catalyst,so that the surface modified perovskite catalyst is obtained. The initial perovskite catalyst is prepared through a sol-gel process, wherein the preparation method has the advantages that the operation is simple and convenient and is short in time, and then hydrogen peroxide is directly used for carrying out surface oxidation modification on the initial perovskite catalyst, so that the surface state of the perovskite catalyst is changed, and the surface area and the stability are improved. The catalyst is applied to the field of diesel engine tail gas purification treatment, emission of sootparticles can be effectively reduced, and therefore the purpose of reducing the air pollution degree is achieved.

The invention discloses a thin film for a solar cell backplane, and belongs to the technical field of solar cell backplanes. The thin film comprises the following raw materials in parts by weight: 11-13 parts of polyethylene-1,4-buthylene adipate glycol, 18-22 parts of fluorine-containing resin, 8-10 parts of polybutylene terephthalate resin, 4-6 parts of polyetheretherketone, 4-6 parts of silicon dioxide, 3-5 parts of titanium dioxide, 3-5 parts of decabromodiphenyl ethane, 7-9 parts of acetyl tributyl citrate, 0.1-0.3 part of a UV absorbent, 0.5-1.5 parts of a coupling agent and 1-3 parts of a surfactant. The invention also discloses a preparation method of the thin film for the solar cell backplane. The thin film provided by the invention has advantages of simple preparation, good adhesion ability, relatively excellent high-temperature resistance and long service life.

The invention discloses a preparation method of an etched anodic oxidation aluminum plate. The preparation method comprises the steps of acid etching polishing treatment or alkali etching matte treatment, anodic oxidation, cleaning, coloring, water washing, hole sealing and the like. According to the preparation method, anodic oxidation treatment is carried out on an aluminum sheet material whichis already subjected to matte or polishing treatment to obtain a bright, clean and highly transparent oxide film layer. By means of the oxide film layer, the surface state and performance of the aluminum plate material are changed, the corrosion resistance, the film bonding capacity and the hardness of the aluminum plate material are improved, and the surface of the aluminum plate material is protected. Moreover, the transparency of the oxide film layer is high, so that etching lines of the etched aluminum plate are clear, and then eye-catching surfaces with a plurality of colors can be obtained by means of coloring, and a better decoration effect is realized. The aluminum plate treated by the surface treatment process is immune from discoloration, fading, corrosion and film layer fallingafter being used for 1-2 years, thereby being long in service life, safe and environmentally friendly.

The invention provides a pollution repairing method for water polluted by organic matters. The method comprises the following steps: mixing metal Fe powder, metal Gd powder, metal Co powder and anhydrous aluminum silicate to obtain a mixture a; ball-milling the mixture a; thermally treating the ball-milled mixture a and carrying out surface treatment and centrifugal atomization to obtain micro powder for water treatment, adding the micro powder for water treatment to a PVC (Poly Vinyl Chloride) spinning solution and stirring to obtain a composite PVC spinning solution; forming the composite PVC spinning solution into a water treatment flexible layer by utilizing an electrospinning method; adding an oxidizing agent and a chelating agent to the water polluted by the organic matters and adjusting the pH (Potential of Hydrogen) value to obtain initially-treated sewage; and enabling the initially-treated sewage to circularly flow through the water treatment flexible layer. Compared with theprior art, the pollution repairing method disclosed by the invention has the advantages that the pollutant eliminating efficiency is higher and the problem of secondary pollution is hardly consideredin the water treatment process.

The invention discloses a starch type impregnating agent for alkali-free glass fibers. The impregnating agent is prepared from, by weight, 3-5 parts of corn starch,1-2 parts of triglyceride, 0.3-8 parts of fatty acid ester, 0.05-0.1 part of polyoxyethylene polyoxypropylene ether, 0.05-0.1 part of fatty acid polyoxyethylene amide, 0.1-1 part of a softening agent, 0.1-0.4 part of an antistatic agent, 0.3-0.6 part of modified epoxy resin, 0.05-0.12 part of a preservative and 0.0005-0.002 part of a defoaming agent. The impregnating agent improves the bonding property between yarn and matrix resinand the permeability of the resin.

The invention discloses a manufacturing method of polyurethane coated calcium ammonium nitrate and polyurethane coated calcium ammonium nitrate manufactured with the method. Particularly, the method comprises the following steps: placing calcium ammonium nitrate in a rotating drum for preheating; preparing a fertilizer surface treatment liquid and uniformly applying the fertilizer surface treatment liquid to the surface of preheated calcium ammonium nitrate to form a liquid film; performing programmed temperature rise; pre-mixing all the raw materials forming a polyurethane coating liquid, preheating and spraying the polyurethane coating liquid to the surface of calcium ammonium nitrate; performing rotating and cooling, and curing the polyurethane coating to obtain polyurethane coated calcium ammonium nitrate. The manufacturing method, which is provided by the technical scheme, of polyurethane coated calcium ammonium nitrate can improve surface defects and thermal stability of calciumammonium nitrate, so that obtained polyurethane coated calcium ammonium nitrate has higher integrity and lower initial dissolution rate.

The invention discloses a preparation method of a composite film layer on the surface of a rare earth magnesium alloy structural part. The preparation method sequentially comprises the steps of oil removal, primary water washing, micro-arc oxidation, secondary water washing, electrophoresis, tertiary water washing and drying and curing. A micro-arc oxidation electrolyte is an aqueous solution containing sodium silicate, sodium fluoride, sodium hydroxide, graphene, Cu(NO3)2 and triethanolamine, electrical parameters of micro-arc oxidation are as follows: the positive current density is 5-15A/dm<2>, the negative current density is 2-3A/dm<2>, the positive duty ratio is 25-70%, the negative duty ratio is 40-50%, the positive frequency is 200-800Hz, the negative frequency is 300-500Hz, the positive and negative stages are both one stage, the micro-arc oxidation time is 10-20 min, electrophoresis liquid for electrophoresis is an aqueous solution containing acrylate, a delustering agent andcarbon black pigment, and electrical parameters of electrophoresis are as follows: the voltage is 50-80V, and the time is 10-30s; and through the coordination effect of micro-arc oxidation and electrophoresis, the composite film layer meeting the requirements of high hardness, high bonding strength and ultraviolet aging resistance at the same time can be prepared.

The invention discloses a magnetic powder activation method for magnetic asphalt, a magnetic asphalt preparation method, an asphalt plate pouring method and a waterproof bonding layer paving method. Firstly, an ultrasonic device is adopted to achieve effective modification of a silane coupling agent in a base solution on the surface of magnetic powder so as to reduce agglomeration of magnetic powder particles in the preparation process of the magnetic asphalt, the magnetic powder with good dispersity is obtained, then the magnetic powder and the asphalt are mixed at different shearing rates and shearing time, the prepared magnetic asphalt is magnetized, and finally, fibers are embedded into a template for pouring, and the magnetic fiber asphalt plate capable of being used for paving the waterproof bonding layer of the steel bridge deck is prepared. The magnetic powder in the prepared magnetic asphalt is uniform in dispersion and free of agglomeration, the magnetic asphalt has high residual magnetism and coercive force, the bonding effect and deformation compliance between a waterproof bonding layer and a steel plate can be improved, the tensile strength of the magnetic asphalt can be improved through embedding of fibers, the service life is prolonged, and the magnetic fiber asphalt plate is simple in preparation method and low in transportation cost, and the pavement process is simple and convenient, and the method has important construction popularization significance.