33 results about "Zinc fluoride" patented technology

The invention belongs to the technical field of preparation of phosphorus trichloride, and particularly relates to a preparation device and method of phosphorus trifluoride. The device comprises a reactor, a cold trap and a collector, the upper part of the reactor is provided with a phosphorus trichloride dropping device and a zinc fluoride feeding port, the upper end of the reactor is provided with a stirring paddle, the stirring paddle extends to the bottom of the reactor, the upper end of the reactor is communicated with the cold trap through a first pipeline, the pipeline is provided with a condensation pipe, and the condensation pipe is communicated with the cold trap through a second pipeline. The bottom of the cold trap is communicated with the reactor through a second pipeline; and the upper end of the cold trap is communicated with the collector through a third pipeline. The method comprises the following steps: dropwise adding phosphorus trichloride into anhydrous zinc fluoride powder in a nitrogen atmosphere, and stirring for reaction; and collecting a reaction product, and recovering phosphorus trichloride. By adding the stirring paddle into the reactor and adopting a two-stage condensation method, the conversion rate of the raw materials is increased, the production cost is reduced, and the operation process is simple.

The invention provides chlorotrifluoroethylene continuously prepared based on a microchannel reactor and a preparation method of the chlorotrifluoroethylene, and the chlorotrifluoroethylene comprises the following raw materials in parts by weight: 1, 1, 2-trifluoro-1, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3 The low-temperature refrigerant refrigerant is prepared from the following components in parts by weight: 90 to 100 parts of 1, 2-trichloroethane, 1 to 5 parts of a zinc fluoride induced palladium-copper bimetallic catalyst, 8 to 15 parts of a cyclohexyl dimethyl ether-formic acid composite hydrogen donor, 0.5 to 2 parts of trifluoroacetic anhydride, 0.1 to 0.5 part of a perfluoropolyether lubricant, a proper amount of a low-temperature mixed refrigerant and 15 to 20 percent by weight of diluted hydrochloric acid. According to the invention, the preparation efficiency and product purity of chlorotrifluoroethylene can be improved, and stable operation of the preparation system and reasonable treatment of byproducts can be guaranteed.

A hydrophobic conductive film (10), a preparation method therefor, and a use thereof, relating to the technical field of semiconductor preparation. The method comprises the following steps: 1) performing a pre-zincation treatment on a surface of a substrate (20), and forming a saturated zinc atom layer (11); 2) alternately feeding a zinc precursor and an oxygen precursor into a reaction chamber and introducing an inert gas for purging, and growing a zinc oxide film layer (12) on a surface of the saturated zinc atom layer (11); 3) performing a post-zincation treatment on the zinc oxide film layer (12) to form a zincated transition layer (13); 4) performing a fluorination post-treatment on the zincated transition layer (13) and forming a zinc fluoride surface layer (14). The prepared hydrophobic conductive film (10) has the characteristics of strong hydrophobicity, good adhesion to the substrate, high film reliability, good film density, precise and controllable thickness, good film uniformity, high step coverage, and high optical transmittance. Compared with microstructures, the hydrophobic conductive film has greater stability, is compatible with various semiconductor packaging processes, effectively resists environmental interference, and can be applied in various hydrophobic scenarios.

The invention discloses a polymer solid electrolyte membrane and application thereof. The polymer solid electrolyte membrane is prepared from 5-15 parts by mass of a polymer, 4-10 parts by mass of a lithium salt, 3-6 parts by mass of a material for constructing a lithium-loving and lithium-phobic layer, 0.5-1.5 parts by mass of a plasticizer and 30-50 parts by mass of a solvent. And the material for constructing the lithium-loving and lithium-phobic layer is one of N-methyl-2, 2, 2-trifluoroacetamide, zinc bis (trifluoromethanesulfonamide) and silver bis (trifluoromethanesulfonamide), and one of zinc fluoride and silver fluoride, and the material for constructing the lithium-loving and lithium-phobic layer is one of N-methyl-2, 2, 2-trifluoroacetamide, zinc bis (trifluoromethanesulfonamide) and silver bis (trifluoromethanesulfonamide). The lithium-loving and lithium-phobic layer is synchronously constructed on the surface of the lithium metal negative electrode, uniform deposition of lithium metal is promoted, growth of lithium dendrites is inhibited, contact between the lithium metal negative electrode and a solid electrolyte interface is improved through uniform generation of the SEI layer, and the cycling stability and safety of the lithium metal negative electrode are remarkably improved.

The invention relates to a method for separating rare earth elements and fluorine in rare earth fluoride slag. The method comprises the following steps: mixing the rare earth fluoride slag with a zinc compound, and roasting at normal pressure; and then carrying out reduced-pressure roasting, collecting a zinc fluoride condensate, and obtaining roasting slag at the same time. According to the method disclosed by the invention, the rare earth elements and fluorine in the rare earth fluoride slag can be separated by using cheap raw materials and simple equipment, so that the method is efficient and low in cost.

The invention relates to the technical field of welding, in particular to high-corrosion-resistance and high-strength welding flux and a preparation method thereof.The welding flux comprises brazing filler metal and brazing flux, and the brazing filler metal comprises 40-55 parts of aluminum, 12-16 parts of aluminum-silicon alloy, 27-33 parts of copper, 0.5-5 parts of germanium, 0.6-1 part of manganese, 0.2-0.6 part of titanium, 2-5 parts of tin and 0.1-0.5 part of rare earth elements; the brazing flux comprises 25 to 50 parts of potassium chloride, 10 to 35 parts of sodium chloride, 4.0 to 30.0 parts of lithium chloride, 10 to 20 parts of a potassium fluoride-aluminum fluoride compound, 0.5 to 6 parts of zinc chloride, 2 to 6 parts of zinc fluoride, 0.05 to 3 parts of sodium fluoride, 0.05 to 3 parts of lithium fluoride, 0.05 to 2 parts of potassium hexafluorosilicate and 0.05 to 1.5 parts of potassium bifluoride. According to the welding flux, through mutual cooperation of the brazing filler metal and the brazing flux, the strength, corrosion resistance and stability of a welded joint are jointly improved.

The invention relates to the technical field of chemical engineering, in particular to a method for preparing antibacterial functional core-shell silicon dioxide from fluorine-containing silicon slag, which comprises the following steps: S1, silicon slag pretreatment: mixing silicon slag with water to prepare slurry, sanding the slurry, and controlling the particle size D50 of SiO2 in the sanded silicon slag to be less than 200nm; s2, alkali activation and silicon release: mixing the sanded slurry with an alkali solution, carrying out a hydrothermal reaction, and controlling the silicon dissolution rate to be within a preset range; s3, constructing a gradient pH core shell: firstly, adjusting the pH of the system to an alkaline interval, and carrying out reaction to form a compact inner shell; adjusting the pH value of the system to an acidic interval, and adding a solution containing zinc and fluorine for reaction to form a composite shell; s4, post-treatment: washing and calcining a product obtained in the step S3 to obtain the core-shell silicon dioxide with the antibacterial function. The silicon slag is purified by a one-step method through a four-step integrated process of pretreatment, activation, gradient coating and post-treatment, and the fluorine-containing waste slag is directionally converted into a high-added-value functional material.

The application relates to the technical field of special optical material preparation, in particular to a full-solid-state three-clad zinc fluoride-based glass optical fiber and a preparation method thereof. The optical fiber comprises, from inside to outside, an optical fiber core layer, an optical fiber inner clad layer, an optical fiber middle clad layer and an outer clad layer; the optical fiber core layer, the optical fiber inner clad layer and the optical fiber middle clad layer are all zinc fluoride-based glass and have the same component types; the refractive index of the optical fiber core layer is greater than that of the optical fiber inner clad layer; the materials of the optical fiber core layer, the optical fiber inner clad layer and the optical fiber middle clad layer all comprise the following components: ZnF2, BaF2, GaF3, SrF2, LiF, YF3, LaF3, PbF2, NaF and 0-12 mol% of rare earth fluoride; and the material of the outer clad layer is polytetrafluoroethylene. The prepared optical fiber has the advantages of high transmittance, low phonon energy, small loss, stable structure, high mechanical strength, simple preparation process, good repeatability, suitability for mass production and application in the fields of communication and the like.

The invention discloses a method for removing calcium and magnesium ions in a zinc sulfate solution and prolonging the working time of an evaporator. The method comprises the following steps: mixing and reacting a zinc sulfate solution, zinc fluoride and an alkaline zinc-containing substance, and filtering to obtain the zinc sulfate solution. According to the method provided by the invention, the content of calcium ions and magnesium ions in the zinc sulfate solution can be effectively reduced, other cation impurities are not introduced, the content of fluorine ions in the zinc sulfate solution can be controlled, and corrosion of the fluorine ions to a pipeline is avoided.

The invention discloses a method for rapidly and efficiently removing magnesium from a zinc hydrometallurgy leaching solution. The method comprises the following steps: firstly, adding sodium fluoride and zinc fluoride into pure water, and stirring to obtain precipitant slurry; adding a zinc-magnesium mixed solution into the composite precipitant slurry, and carrying out solid-liquid separation after precipitation to obtain a magnesium precipitate and a zinc-containing filtrate; according to the method, the zinc-magnesium mixed solution is reversely added into the sodium fluoride and zinc fluoride precipitant, so that the filtering speed of solid-liquid separation can be remarkably increased, meanwhile, it can be guaranteed that magnesium ions have a high precipitation rate, efficient magnesium removal of the zinc hydrometallurgy leaching solution is achieved, and the method is suitable for large-scale popularization and application. Therefore, the problems of difficult filtration and insufficient magnesium precipitation rate caused by a single precipitator and a precipitator forward adding method are solved, the whole process is mild in operation condition, the operation can be completed under normal pressure and at the temperature close to the temperature of the zinc hydrometallurgy leaching solution, and the process is suitable for industrial popularization and has better industrial application value.

The application discloses high-purity anhydrous scandium fluoride and a preparation method thereof, and belongs to the field of rare earth fluoride preparation. The preparation method comprises the following steps: mixing scandium oxide and zinc fluoride by a mechanical activation treatment method to obtain mixed raw materials, using mechanical activation to induce crystal lattice defects, significantly improving the kinetic conditions of the solid-solid reaction process of scandium oxide and zinc fluoride, and making fluorination more sufficient; roasting the mixed raw materials under an inert atmosphere to obtain roasted materials; putting the roasted materials into a mixed leaching system containing ammonia and ammonium salt for selective leaching, and then filtering and separating to obtain a solid crude product; using an ammonia-ammonium salt complex system, using the high stability of Zn(NH3)4] 2+ complex ions to realize accurate separation of by-products Zn and main products ScF3; and washing and drying the solid crude product to obtain anhydrous scandium fluoride, with a content of 400 ppm or less and a fluorination rate of 99.99%.

The invention discloses a method for stabilizing a ZnOHF protective layer in zinc sulfate and an application of the method in an aqueous zinc ion battery, only one external ion is introduced, namely, existence of ZnOHF is stabilized in 2M ZnSO4 through regulation and control of an electrolyte, so that the purposes of homogenizing an electric field and uniformly depositing zinc are achieved through a synergistic effect, and meanwhile, the protective layer is also continuously repaired in a solution, so that the service life of the zinc sulfate battery is prolonged, and the service life of the zinc sulfate battery is prolonged. Therefore, the zinc negative electrode is stabilized. The solvent of the electrolyte is water, and the solute of the electrolyte is zinc fluoride (ZnF2) and zinc sulfate (ZnSO4). And the protective layer is made of zinc oxyfluoride (ZnOHF). And the zinc negative electrode comprises a zinc sheet, a zinc foil, zinc powder, a zinc net, porous zinc or zinc alloy. Under the synergistic effect of the electrolyte and the protective layer, the zinc negative electrode shows excellent deposition dissolution reversibility, dendritic crystal growth and hydrogen evolution reaction are inhibited, and generation of by-products is slowed down. The method is simple and low in cost, and the cycling stability of the zinc negative electrode in the water-based zinc ion battery can be remarkably improved.

The application belongs to the technical field of batteries, and discloses a local high-concentration ionic liquid electrolyte, a preparation method thereof and an assembled high-voltage zinc-tellurium battery. The electrolyte comprises an ionic liquid, zinc bromide, zinc fluoride and an organic cosolvent; the ionic liquid is one or more of 1-vinyl-3-butyl imidazolium bromide, 1-ethyl-3-methyl imidazolium bromide, 1-propyl-3-methyl imidazolium bromide or 1-butyl-3-methyl imidazolium bromide. The local high-concentration ionic liquid electrolyte contains active species ZnBr4 2‑ , which can activate the positive-valence conversion of tellurium, play the effect of exciting and stabilizing the Te 0 / Te 4+ redox pair. The zinc-tellurium battery assembled thereby can realize the two-step conversion reaction of Te 4+ / Te and Te / Te 2‑ of the tellurium positive electrode, improve the energy output of the battery, increase the high-voltage discharge platform capacity ratio of the zinc-tellurium battery to 80.6%, and improve the rate performance of the zinc-tellurium battery.

Method comprising: forming a dummy gate structure (75) over a semiconductor fin (64); forming a dielectric layer (90) on opposite sides of the dummy gate structure (75); removing the dummy gate structure (75) to form a recess (92) in the dielectric layer (90); successively forming a gate dielectric layer (94) and at least one conductive layer (96, 98) over side walls and a bottom surface of the recess (92);and treating the gate dielectric layer (94) and the at least one conductive layer (96, 98) with a fluoride-containing chemical, wherein the treatment comprises forming a film over the at least one conductive layer (96, 98) using a fluoride-containing precursor, wherein the fluoride-containing precursor is molybdenum hexafluoride, MoF6, iron(II) fluoride, FeF2, iron(III) fluoride, FeF3, nickel(II) fluoride, NiF2, cobalt(II) fluoride, CoF2, chromium(II) fluoride, CrF2, chromium(III) fluoride, CrF3, copper(I) fluoride, CuF, molybdenum(III) fluoride, MoF3, titanium(III) fluoride, TiF3, titanium(IV) fluoride, TiF4, aluminum fluoride, AlF3, tetrafluorosilane, SiF4, manganese(II) fluoride, MnF2, zirconium(IV) fluoride, ZrF4, niobium(V) fluoride, NbF5, hafnium(IV) fluoride, HfF4, tantalum(V) fluoride, TaF5, sodium fluoride, NaF, potassium fluoride, KF, lithium fluoride, LiF, magnesium fluoride, MgF2, calcium fluoride, CaF2, barium fluoride, BaF2, zinc fluoride, ZnF2 or lead(II) fluoride, PbF2.;

The invention discloses a method for preparing fluoroformate, which comprises the following steps: by taking chloroformate as a raw material and hydrogen fluoride as a fluorination reagent, mixing chloroformate steam and hydrogen fluoride gas, and performing gas-phase catalysis on the chloroformate and hydrogen fluoride to generate fluorination reaction through a fixed bed reactor filled with a catalyst to obtain the fluoroformate, the catalyst is characterized in that at least one of active components of lithium fluoride, potassium fluoride, sodium fluoride, rubidium fluoride or cesium fluoride is loaded on at least one of carriers of activated carbon, aluminum fluoride, magnesium fluoride, ferric fluoride, chromium fluoride and zinc fluoride, the mass percentage ratio of the active components to the carriers of the catalyst is 10-50%: 50-90%, the reaction temperature is 200-400 DEG C, and the retention time is 10-60 s. The method has the advantages of greenness, high efficiency, continuous catalysis and the like.

The invention discloses a photoelectric device and a preparation method thereof, and a display device, the photoelectric device comprises an anode and a cathode which are oppositely arranged, and also comprises an electron transport layer arranged between the anode and the cathode, the photoelectric device also comprises an interface layer, the interface layer is located between the cathode and the electron transport layer, and the interface layer is located between the cathode and the electron transport layer. And the interface layer comprises zinc fluoride. The photoelectric device comprises the interface layer, the material of the interface layer comprises zinc fluoride, and the zinc fluoride can effectively reduce the injection barrier of electrons, so that the electron mobility of the photoelectric device is improved.

The invention provides a positive pole piece, a secondary battery, a battery pack and an energy storage system, the secondary electrode comprises the positive pole piece, the positive pole piece comprises a positive active material with a core-shell structure, the core of the core-shell structure is a layered transition metal oxide, the shell of the core-shell structure is made of a first fluoride, and the first fluoride is made of a second fluoride. The first fluoride is selected from at least one of zinc fluoride, zirconium fluoride, niobium fluoride, titanium fluoride and cadmium fluoride. According to the present invention, even if the active layer including the positive electrode active material cracks, the layered transition metal oxide does not directly contact the electrolyte, but the layered transition metal oxide is separated from the electrolyte through the shell, such that the transition ions in the layered transition metal oxide are prevented from being dissolved, and the cycle stability of the secondary battery is improved. Zinc, zirconium, niobium, titanium and cadmium belong to transition metals and have relatively good stability, and the shell contains fluorides of the elements, so that the positive active material has long-term stability, and the long cycle stability of the secondary battery is improved.

The application discloses a method for stabilizing a ZnOHF protective layer in zinc sulfate and application of the method to a water-based zinc ion battery, only introduces an external ion, that is, the existence of ZnOHF is stabilized in 2M ZnSO4 through electrolyte regulation, so that the ZnOHF can synergize, a uniform electric field is achieved, and the purpose of uniform zinc deposition is achieved, meanwhile, the protective layer in the solution is continuously repaired, so that the method for stabilizing a zinc negative electrode is realized. The electrolyte solvent is water, and the solute is zinc fluoride (ZnF2) and zinc sulfate (ZnSO4). The protective layer is zinc hydroxide fluoride (ZnOHF). The zinc negative electrode comprises zinc sheets, zinc foils, zinc powders, zinc meshes, porous zinc or zinc alloys. Under the synergistic effect of the electrolyte and the protective layer, the zinc negative electrode exhibits excellent deposition-dissolution reversibility, the dendrite growth is inhibited, the hydrogen evolution reaction is inhibited, and the generation of by-products is slowed down. The method is simple and low in cost, and can significantly improve the cycle stability of the zinc negative electrode in the water-based zinc ion battery.

The invention provides a diaphragm and a preparation method thereof, a secondary battery and an electric device. The diaphragm comprises a base membrane as well as a first coating and a second coating which are sequentially arranged on one side of the base membrane, the first coating comprises an inorganic material and a first binder in a mass ratio of (60-95): (5-40); the second coating is prepared from zinc fluoride, polyacrylic acid and a second binder according to the mass ratio of (40 to 80): (20 to 60): (1 to 5). The diaphragm has relatively high mechanical strength and can promote uniform deposition of a lithium element. The invention further provides a preparation method of the diaphragm, and preparation of the diaphragm is achieved. Finally, the invention also provides a secondary battery and an electric device, and the cycle performance and the safety performance of the secondary battery are obviously improved.

The invention discloses high-transmittance self-cleaning coated glass and a preparation method thereof, and belongs to the technical field of functional glass. The components of the high-transmittance coating film comprise magnesium fluoride, titanium dioxide, zinc fluoride and zinc salt, magnesium fluoride, titanium dioxide and zinc fluoride have high refractive indexes, light reflection can be effectively reduced, when light is emitted into the glass from air, light can be reflected on the upper interface and the lower interface of the high-transmittance coating film, and the light transmittance is improved. The reflected light on the two interfaces is subjected to destructive interference, so that the intensity of the reflected light is reduced, the reduction of the reflected light means that the transmission light is increased, and the light transmission of the glass is improved. The micro-nano array is arranged on the surface of the coated glass, so that the light transmittance of the glass can be improved, the surface characteristics of the glass can be effectively improved, dust, organic pollutants and the like are automatically separated from the surface of the glass under the washing of rainwater, and the self-cleaning effect of the glass is improved.

The present invention relates to a method for separating rare earth elements and fluorine in fluoride rare earth slag, comprising: mixing the fluoride rare earth slag with a zinc compound and then calcining it at normal pressure; then calcining it at reduced pressure, collecting zinc fluoride condensate, and obtaining calcined slag. The method according to the present invention can use cheap raw materials and simple equipment to achieve the separation of rare earth elements and fluorine in the fluoride rare earth slag, so it is efficient and low in cost.

The invention discloses a preparation method and application of perovskite quantum dots based on zinc fluoride double-shell engineering passivation, and the preparation method comprises the following steps: mixing a cesium carbonate n-caprylic acid mixed solution and an n-caprylic acid solution to obtain a cesium carbonate mixed solution; adding the cesium carbonate mixed solution into the lead bromide-tetra-n-octyl ammonium bromide toluene mixed solution, and stirring at room temperature to obtain a precursor; injecting a didodecyl dimethyl ammonium bromide toluene solution into the precursor for reaction, and then injecting a zinc fluoride-tetra-n-octyl ammonium bromide toluene mixed solution to obtain a zinc fluoride ligand modified perovskite quantum dot stock solution; and adding ethyl acetate into the zinc fluoride ligand modified perovskite quantum dot stock solution, and carrying out centrifugal drying to obtain the perovskite quantum dot fluorescent powder. The zinc fluoride inorganic ligand is introduced in the synthesis process and can be more tightly combined with the surface of the perovskite quantum dot, surface defects are effectively passivated, the stability of the quantum dot is remarkably enhanced, and meanwhile the optical performance of the quantum dot is improved.

The invention discloses a synthesis method and a purification process of high-purity phosphorus trifluoride, and relates to the technical field of inorganic fluoride preparation. The synthesis method and the purification process of the high-purity phosphorus trifluoride at least comprise the following steps: reacting zinc fluoride with phosphorus trichloride at 20-80 DEG C to obtain a phosphorus trifluoride crude product; the phosphorus trifluoride crude product is subjected to pre-purification, and pre-purified gas is obtained; freezing and collecting the pre-purified gas to obtain pre-purified phosphorus trifluoride gas; the pre-purified phosphorus trifluoride gas is subjected to deep purification, and high-purity phosphorus trifluoride is obtained. According to the synthesis method and the purification process of the high-purity phosphorus trifluoride, impurities can be effectively removed, a phosphorus trifluoride product with the purity reaching 6N or above can be finally obtained, the purification process is optimized, the product purity is remarkably improved, and the synthesis method and the purification process have the remarkable advantages of being simple in process, low in cost and suitable for large-scale industrial production.

The present invention belongs to the technical field of gas-sensitive materials, and relates to an in-situ fluorine-doped nickel oxide / zinc oxide composite material, and its preparation method and application. The preparation method comprises the following steps: adding hydroxy zinc fluoride, a nickel source, an alkali source, and a surfactant to an alcohol solvent, mixing them evenly, and then performing a solvent thermal reaction to obtain a hydroxy zinc fluoride / nickel hydroxide precursor, and annealing the hydroxy zinc fluoride / nickel hydroxide precursor to thermally decompose the hydroxy zinc fluoride / nickel hydroxide precursor. The composite material prepared by the present invention utilizes its unique morphological structure, and through the high hygroscopicity of nickel oxide and the strong electronegative fluoride ion doping effect, it significantly inhibits the interference of water molecules on the active sites of the material and the formation of surface hydroxyl groups, and successfully realizes humidity-independent, highly sensitive, and highly selective NO2 detection under wide working temperature and relative humidity conditions, and has excellent practical application value and industrial production prospects.

The present application relates to a kind of zinc surface chromium-free passivation solution and its application, the pH value of the zinc surface chromium-free passivation solution is 8±0.5, it at least dissolves the following substances: (i) transition metal acid or transition metal salt, (ii) hydrogen fluoride or fluoridated salt, (iii) hydrogen peroxide or metal peroxide.The transition metal acid or transition metal salt used in the zinc surface chromium-free passivation solution is reduced into dense transition metal oxide on the surface of zinc oxide itself, zinc surface is oxidized due to the double oxidation of transition metal acid radical and peroxide, forms zinc oxide, and part of divalent zinc is combined into zinc fluoride with fluoride ion, finally forms the passivation film of three substances coexisting of transition metal oxide, zinc oxide, zinc fluoride, and the salt spray corrosion resistance of zinc surface after passivation exceeds 168 hours.

The invention provides Er-doped fluorine tellurium boron zinc laser glass based on zinc fluoride regulation and a preparation method thereof, and belongs to the field of laser glass. The Er-doped fluorine tellurium boron zinc laser glass based on zinc fluoride regulation and control provided by the invention is prepared from a matrix raw material and an erbium oxide doped raw material, the matrix raw material is prepared from the following components in percentage by mass: 67.5 to 77.5 percent of tellurium dioxide, 7 to 8 percent of B2O3, 8 to 12 percent of zinc oxide and 5 to 15 percent of zinc fluoride; the doping amount of the erbium oxide doped raw material is 0.7-0.8% of the total amount of substance of the matrix raw material. The Er-doped fluorine tellurium boron zinc laser glass based on zinc fluoride regulation and control provided by the invention has good thermal stability and light transmission, and also has better luminous efficiency.

To provide a denture adhesive remover that can fully remove denture adhesive attached to dentures.SOLUTION: A denture adhesive remover comprises: at least one polar base selected from the group consisting of lower alcohols having 1 to 5 carbon atoms and polyhydric alcohols; and at least one metal compound selected from the group consisting of calcium chloride, calcium lactate, sodium chloride, magnesium chloride, zinc chloride, iron chloride, sodium carbonate, potassium fluoride, zinc fluoride, aluminum phosphate, sodium thiosulfate, anhydrous sodium sulfate, magnesium sulfate, aluminum sulfate, ferrous sulfate, sodium sulfite, calcium nitrate, magnesium nitrate, zinc nitrate, aluminum lactate, potassium acetate, calcium acetate, magnesium acetate, iron hexacyanoate, sodium hydroxide, potassium hydroxide, calcium oxide, aluminum oxide, aluminum ammonium sulfate, ammonium iron sulfate, potassium aluminum sulfate, and hydrates thereof. The concentration of the polar base is 1 to 99 mass% based on the total amount of the denture adhesive remover, and the concentration of the metal compound is 0.01 to 97 mass% based on the total amount of the denture adhesive remover.SELECTED DRAWING: None

The present invention relates to a method for removing fluoride ions from zinc sulfate solution, belonging to the technical field of hydrometallurgical zinc smelting. The present invention comprises the following steps: (1) adding calcium hydroxide powder to the zinc sulfate solution, and simultaneously introducing an inert gas into the zinc sulfate solution, so that calcium ions react with fluoride ions to form calcium fluoride precipitate; (2) filtering the solution after the reaction in step (1) to obtain supernatant and precipitate residue; (3) adding water to the precipitate residue obtained by filtration in step (2), then adding sodium hydroxide to adjust the pH value, and then adding a complexing agent to cause a complexation reaction of the precipitate residue; (4) filtering the liquid after the complexation reaction in step (3) to separate calcium fluoride and zinc fluoride in the precipitate residue; The present invention removes fluoride ions through chemical reactions, improves the removal rate and efficiency, reduces the volatilization amount of hydrogen fluoride, reduces the probability of the occurrence of the situation where the adsorbent has no contact with hydrogen fluoride, separates zinc fluoride for reuse, and reduces the zinc loss rate.

The invention discloses a preparation method of a zinc negative electrode wide temperature type coating material for an Ah-grade zinc-manganese dioxide soft package battery. Zinc fluoride and zinc carbonate additives are introduced into a commercial coating to construct a zinc negative electrode organic-inorganic composite coating. At a low temperature (-30 DEG C), inorganic components in the coating promote migration and uniform deposition of Zn, and an organic layer blocks water corrosion and inhibits a hydrogen evolution reaction; at the high temperature (60 DEG C), the coating effectively reduces the content of free water on the zinc surface and inhibits side reaction and dendritic crystal growth caused by high water activity. The ZnMnO total battery assembled by the coating modified zinc foil can stably circulate for 1000 circles under the current density of 1A g at the temperature of-30 DEG C and 60 DEG C. The assembled zinc-manganese dioxide soft package battery can stably circulate for 20 circles at the temperature of-20 DEG C, and the capacity reaches 1.4 Ah. In conclusion, the coating modified zinc negative electrode obviously enhances the wide temperature range stability of the zinc-manganese dioxide soft package battery. The preparation process is simple, efficient and low in cost, and meets the requirements of environmental and economic benefits.

The present invention relates to the field of welding technology, and particularly to a high corrosion-resistant and high-strength solder and a preparation method thereof. The solder includes a filler metal and a soldering flux. The filler metal includes: 40 - 55 parts of aluminum, 12 - 16 parts of aluminum-silicon alloy, 27 - 33 parts of copper, 0.5 - 5 parts of germanium, 0.6 - 1 part of manganese, 0.2 - 0.6 part of titanium, 2 - 5 parts of tin, and 0.1 - 0.5 part of rare earth element; the soldering flux includes: 25 - 50 parts of potassium chloride, 10 - 35 parts of sodium chloride, 4.0 - 30.0 parts of lithium chloride, 10 - 20 parts of potassium fluoride-aluminum fluoride complex, 0.5 - 6 parts of zinc chloride, 2 - 6 parts of zinc fluoride, 0.05 - 3 parts of sodium fluoride, 0.05 - 3 parts of lithium fluoride, 0.05 - 2 parts of potassium hexafluorosilicate, and 0.05 - 1.5 parts of potassium hydrogen fluoride. Through the mutual cooperation of the filler metal and the soldering flux, the strength, corrosion resistance, and stability of the welded joint are jointly improved.