44 results about "Fluorosilicate salt" patented technology

The invention discloses a zinc layer surface conversion film forming liquid, and an application method of the film forming liquid. The prepared zinc layer surface conversion film forming liquid is an aqueous solution with a pH value of 0.5 to 2, where in the pH value is regulated by nitric acid or sulfuric acid. The film forming liquid is prepared from cerium salt, halide, phosphate, meta-vanadate, fluorosilicate and water. The method comprises the steps that: a surface oxide layer of a galvanized material is removed through alkali washing and desmutting treatments; the treated galvanized material is immersed in the zinc layer surface conversion film forming liquid for 30 seconds to 30 minutes under a temperature of 10 DEG C to 70 DEG C; such that a conversion film is formed on the surface of the galvanized material. The formed conversion film has a uniform color and an excellent anti-corrosion performance. The film forming liquid and the method provided by the invention have values to be widely applied in industrial productions.

The present invention discloses an organofluorosilicate glass film comprising organic and inorganic matter and not including appreciable amounts of fluorocarbons. A preferred thin film is represented by the formula: Si v o w C x h y f z , where v+w+x+y+z=100%, v from 10-35 atomic%, w from 10-65 atomic%, y from 10-50 atomic%, x from 1-30 atomic%, z from 0.1-15 at%, x / z optionally greater than 0.25, wherein substantially no fluorine is attached to carbon. In addition, the present invention also provides a CVD method, comprising: (a) providing a substrate in a vacuum chamber; (b) introducing a gas-phase reactant into the vacuum chamber, the reactant comprising fluorine-supplying gas, oxygen-supplying gas, and at least a precursor gas selected from organosilanes and organosiloxanes; and (c) applying energy to gas phase reactants in the chamber to cause the gas phase reactants to react and form a film on the substrate.

The invention discloses a refining agent for aluminum alloys containing a high proportion of returned charge and a method for using the same. The refining agent includes general components and functional components, and the general components include chloride metal salts, fluorine metal salts, and fluoroaluminate Or one or two of fluorosilicates; functional components include the following components: niobium alloy, copper alloy, metal zinc, rare earth. After the refining agent of the present invention is added to the aluminum alloy melt containing a high proportion of recycled materials, it can fully diffuse from bottom to top without adsorption and agglomeration, quickly exerts the refining effect, and obtains a high-purity aluminum alloy melt. When it is used to refine aluminum alloy melt containing a high proportion of returned materials, the hydrogen content of the aluminum melt can be reduced to a level not exceeding 0.10ml / 100g Al, and the total oxygen content of the aluminum melt can be reduced to 80ppm. In addition to its excellent degassing and impurity removal effects, the refining agent can also significantly reduce the number and size of β‑Al5FeSi phase in the casting structure, eliminate the harmful effect of impurity iron in aluminum alloys, and thus improve the mechanical properties of cast aluminum alloy castings performance and yield.

The present invention relates to a self hardening glass carbomer composition obtainable by treating a fluorosilicate glass powder with: (a) a poly(dialkylsiloxane) having terminal hydroxyl groups, wherein the alkyl groups contain 1 to 4 carbon atoms, (b) an aqueous acid solution, and (c) separating the treated fluorosilicate glass powder from the aqueous acid solution. The glass carbomer compositions according to the invention have for example good toughness and strength and excellent fluoride release, In addition, the glass carbomer compositions according to the invention do not show shrinkage or expansion, an essential property for providing fillings for cavities having high strength and long durability. Moreover, the glass carbomer composition according to the present invention has a lower sensitivity towards abrasion and wear, a greater stiffness, a smoother surface, a better colourfastness, a better adherence to e.g. bone tissue and a lower water sensitivity.

The invention discloses a method for detecting a mixed acid solution in the manufacturing process of a polycrystalline silicon solar cell. The method is used for detecting a mixed acid system which consists of hydrofluoric acid, nitric acid and fluorosilicic acid. The method comprises the following steps of: detecting the total acid concentration of the solution by using an acid-base neutralization method; heating and boiling the solution which is subjected to acid-base neutralization, decomposing fluorosilicate to generate hydrogen ions, determining the content of the hydrogen ions by alkali liquor titration, and thus obtaining the concentration of the fluorosilicic acid by calculation; detecting the concentration of the nitric acid in the mixed acid solution by using an oxidation-reduction titration method; and subtracting the concentration of the fluorosilicic acid and the concentration of the nitric acid from the total acid concentration, and thus obtaining the concentration of the hydrofluoric acid. The method is simple in flow, easy to operate and low in economic investment and can be applied to long-term monitoring of a texturing process and an etching process in the production process of the polycrystalline silicon solar cell and stability of equipment, manpower resources are saved, high-end equipment is eliminated, detection accuracy can be over 95 percent.

The invention provides a non-alkali liquid quick-setting agent and its preparation method and application. In terms of mass percentage, the raw materials of the non-alkali liquid quick-setting agent include the following components: aluminum sulfate: 45% to 55%, nano-alumina: 5%~10%, hydrofluoric acid: 5%~10%, solubilizing component: 3%~7%, fluorosilicate: 2%~6%, early strength component: 1%~4%, stable Components: 0.5-1%, water: 20-32%. The alkali-free liquid quick-setting agent of the present invention uses aluminum sulfate as the main raw material, and is equipped with nano-alumina, hydrofluoric acid, solubilizing components, fluorosilicates, early-strength components, and stabilizing components, so that it has good Accelerating effect, long-term stability and low rebound rate. At 7% dosage, all performances have reached the standard JC477-2005 "Accelerators for Shotcrete" for first-class accelerators Requirements, and the non-alkali liquid quick-setting agent of the present invention can greatly improve the early strength of concrete, and can make the later strength have a higher strength retention rate.

The invention discloses an early-strength polycarboxylate water reducer as well as its preparation method and application. Early-strength polycarboxylate superplasticizer includes the following components: polycarboxylate high-efficiency water-reducer mother liquor, early-strength components, defoamers, accelerators, fluorosilicates; the early-strength components include organic early-strength components The strong component and the inorganic early-strength component, the mass ratio of the organic early-strength component and the inorganic early-strength component is 1: (0.8-1.2); the polycarboxylate high-efficiency water reducer mother liquor includes the following raw materials in parts by weight: 20-45 parts of methoxypolyethylene glycol, 15-20 parts of 1,2,4,5-pyrellitic anhydride, 5-14 parts of sodium methacrylate sulfonate, 15-20 parts of p-toluenesulfonic acid, 35 ‑40 parts of ionized water, 1‑5 parts of polymerization inhibitor, 2.5‑5 parts of initiator, 1‑3 parts of pH regulator. The early-strength polycarboxylate water-reducer of the invention has the advantages of being able to increase the early strength of concrete without affecting the later strength of concrete and improving the frost resistance of concrete.

It relates to a method and equipment for purifying calcium fluoride from decarbonated fluorine-containing solid waste. The method is to perform selective acid leaching on the fluorine-containing solid waste from which carbonate has been removed, and use hydrofluoric acid solution to remove di Silicon oxide; after acid-solid-liquid separation, the separated silicon-containing fluorine-containing solid waste and silicon-containing fluoric acid waste acid liquid are obtained; the silicon-containing fluorine-containing solid waste is rinsed in the first cycle and dried to obtain the finished product of calcium fluoride; recycling Regenerate the silicofluoric acid in the waste acid solution containing silicofluoric acid, take the solid and dry to obtain the fluorosilicate solid and separate the recovered acid for mixing with the acid leaching solution of selective acid leaching; when the leaching in the first cycle rinsing If the acidity of the solution exceeds the lower pH threshold, it is exported and used for second precipitation and solid-liquid separation using calcium salts to obtain separated calcium fluoride and calcium chloride. The invention can individually purify calcium fluoride, calcium chloride and fluorosilicate solids from fluorine-containing solid waste with high efficiency, use hydrofluoric acid with high efficiency, and realize the discharge of zero waste acid waste water.

The invention discloses an alkali-free and chlorine-free dormant wake-up agent composition for wet shotcrete and a method for using the same. The dormancy agent in the composition consists of fluorosilicate, hydroxycarboxylic acid, chelating agent, polyacrylic acid and water. ; The wake-up agent in the composition is composed of water-soluble calcium salt, alkanolamine, silica sol and water. The beneficial effects of the invention are: the product does not contain alkali metal ions such as potassium and sodium, and does not contain chloride ions. It can effectively improve the working performance retention time of wet shotcrete and at the same time effectively improve the spraying effect of shotcrete. It has good adaptability to alkaline and non-alkali accelerator, and the application method is simple.

The invention relates to the technical field of curing agents and particularly relates to a curing agent for sealing and hardening surface of concrete, as well as preparation and construction methods thereof. The curing agent for sealing and hardening the surface of the concrete, provided by the invention, comprises the following components in percentage by weight: 0.1-2% of fluorosilicate, 0.001-0.02% of surfactant, 5.0-30.0% of at least one of silica sol or silicate and the balance of water. The curing agent for sealing and hardening the surface of the concrete, provided by the invention, has the advantages of short curing time, thick surface hardened layer and high surface hardness, and can be widely used for surface hardening and curing treatment of concrete buildings or structures of highways, squares, garages, supermarkets, factory buildings and the like.