35 results about "Rubidium fluoride" patented technology

The invention discloses a preparation method of difluoro-sulfonyl imide lithium. The preparation method comprises the following steps: 1) under a protective atmosphere, adding a fluorizating agent into difluoro-sulfonyl imide to perform a fluorination reaction so as to obtain a mixture, wherein the fluorizating agent is one of or a combination of fluorine, a fluorine-containing mixed gas, anhydrous hydrogen fluoride, potassium fluoride, antimonic fluoride and rubidium fluoride; 2) performing reduced pressure distillation on the obtained mixture to obtain a di(fluoro-sulfonyl) imide intermediate; and 3) under a protective atmosphere, performing synthetic reaction on the obtained di(fluoro-sulfonyl) imide intermediate and a lithium source, and performing solid-liquid separation to obtain difluoro-sulfonyl imide lithium. According to the preparation method disclosed by the invention, the fluorination reaction does not need a solvent or other auxiliary agent, is less in types of adopted reagents, does not introduce a new impurity, is simple in operation, and is easy to control; the method is less in side reaction, good in fluorination effect and low in fluorination cost; and the purity and the yield of the product namely difluoro-sulfonyl imide lithium obtained by a subsequent synthetic reaction are improved on the whole, and the method has good economic and environmental benefits.

The invention discloses a composite brazing flux suitable for copper and aluminum dissimilar metal brazing. The composite brazing flux comprises 50-55% of cesium fluoride, 30-35% of aluminum fluoride, 3-5% of potassium fluoride, 10-12% of rubidium fluoride, 0.1-1% of potassium fluorogermanate, 0.1-0.5% of zinc difluoro and 0.1-0.5% of potassium fluoborate. The composite brazing flux is formed by preparing seven kinds of fluoride in proportion, and has the advantages of being non-hygroscopic and free of corrosion compared with a traditional chloride brazing flux; compared with a traditional fluoride brazing flux, the composite brazing flux obviously narrows the activity temperature range and further improves the activity; compared with a traditional fluoride brazing flux, the spreading area of ZN-15AL brazing filler metal on an aluminum alloy plate at 500 DEGC is improved by about 40%, and the spreading area of the ZN-15AL brazing filler metal on the aluminum alloy plate at 520 DEG C is improved by about 25%.

A method of synthesizing rubidium uranium fluoride crystals. The method includes combining uranium-based feedstock with a mineralizer solution that includes a rubidium fluoride. The feedstock and mineralizer solution are pressurized and a thermal gradient applied thereto such that a first portion of the feedstock and the mineralizer solution is heated to a temperature that is greater than a temperature of a second portion of the feedstock and the mineralizer solution. Uranium nutrient enters the mineralizer solution from the feedstock in the first portion and uranium nutrient precipitates to spontaneously form crystals in the second portion.

The invention discloses cesium and rubidium brazing flux containing zinc tetrafluoroborate hydrate. The cesium and rubidium brazing flux comprises, by mass percentage, 0.001%-0.01% of rubidium fluoride, 10.0%-50.0% of cesium fluoride, 0.01%-5.0% of aluminum oxide, 0.01%-5.0% of potassium fluoride, 0.001%-0.25% of zinc tetrafluoroborate hydrate and the balance aluminum fluoride. According to the cesium and rubidium brazing flux containing zinc tetrafluoroborate hydrate, zinc tetrafluoroborate hydrate is added, the usage amount of rubidium fluoride is reduced greatly, brazing of the same material of aluminum-aluminum, dissimilar materials of aluminum-cooper, dissimilar materials of aluminum-steel and an alloy material of aluminum-aluminum can be achieved, the material cost is reduced remarkably, and the brazing flux has excellent capacity of removing FeO, Fe2O3, NiO, Cr2O3 and other oxide on the surface of aluminum alloy or steel; and the brazing flux on the base metal has excellent wetting performance, spreading performance and penetrating performance, the brazing seam strength can reach 125 MPa to 145 MPa, and the requirements for low lost, high reliability and environmental-friendly manufacturing of the industries of air conditioners, refrigerator complete machines, refrigeration accessories, rail transit and energy can be met.

The invention provides a method for selectively synthesizing hexafluoropropylene oxide oligomers, comprising the following steps: A) adding phosphonamide, metal fluoride salt and organic solvent into a reaction device, and stirring in an airtight manner; the metal fluoride The salt is a monovalent metal fluoride salt or a divalent metal fluoride salt, and the monovalent metal fluoride salt is one or more of lithium fluoride, sodium fluoride, potassium fluoride, rubidium fluoride and cesium fluoride kind, the divalent metal fluoride salt is one or more of zinc fluoride, barium fluoride and magnesium fluoride; B) passing hexafluoropropylene oxide into the reaction device for reaction to obtain Hexafluoropropylene oxide dimer or hexafluoropropylene oxide trimer. The invention has low raw material cost, does not need low temperature and dry environment, and is environmentally friendly, and can selectively synthesize hexafluoropropylene oxide dimer or trimer with a content of more than 80%.

The invention relates to a method for preparing halogenated pentacyclic olefin by gas-phase isomerization reaction. The method comprises the following steps of: by adopting the halogenated pentacyclic olefin C5HxFyClz as a material, under the existence of an isomerization catalyst, generating the gas-phase isomerization reaction to obtain isomers of the halogenated pentacyclic olefin, wherein X is an integer from 0 to 2, Y is an integer from 4 to 7, Z is an integer from 0 to 4, the sum of X and Y and Z is 8, and the isomerization catalyst is prepared by adopting at least one of lithium fluoride, potassium fluoride, sodium fluoride, rubidium fluoride or cesium fluoride as an active component and loading the active component on at least one of carriers such as aluminium fluoride, magnesium fluoride, iron fluoride, chromium fluoride and zinc fluoride. The method has the advantages that the material is easy to obtain, the isomerization catalyst is low in price, the yield of the isomer is higher, and the method is applicable to large-scale preparation of the isomers of the halogenated pentacyclic olefin by gas-phase reaction.

The invention relates to the technical field of sputtering targets, in particular to a ceramic target and a preparation method thereof. The preparation method includes: A) homogeneously mixing the copper-zinc-tin-selenium powder and rubidium fluoride powder, and pre-pressing the homogeneously mixed powder to obtain a green body; B) in a vacuum Under certain conditions, heat the green body to 200-400°C and keep it warm; C) then heat it to 600-700°C, heat it and carry out hot-press sintering at 25-50MPa, after cooling down and decompressing, the target blank is obtained ; D) machining the target blank to obtain a ceramic target material. The ceramic target material prepared by the preparation method provided by the invention has high purity and density and uniform components. It provides a certain theoretical reference for the preparation of high-performance doped targets. The results show that the purity of the ceramic target prepared by the present invention is >99.99%, and the density is 5.53-5.58g / cm 3 , The relative density is 94-95%.

The invention discloses a composite zinc-aluminum flux cored wire containing beryllium and magnesium and rubidium salt. The composite zinc-aluminum flux cored wire comprises a wire body consisting of an outer metal skin and core brazing flux powder, wherein the outer metal skin is prepared by the following raw materials by weight percent: 80.5 to 98.5% of zinc, 0.01 to 6.5% of silver, 0.01 to 3% of copper, 0.001 to 2% of nickel, 0.001 to 0.5% of beryllium, 0.001 to 1.2% of magnesium, 0.001 to 0.5% of rare earth element and the balance of aluminum; and the brazing flux powder is prepared by the following raw materials by weight percent: 15 to 35% of aluminum fluoride, 30 to 75% of cesium fluoride, 2.5 to 10% of rubidium fluoride, and the balance of potassium fluoride. The invention also provides a preparation method of the composite zinc-aluminum flux cored wire. The preparation method has the advantages that trace Be and Mg are introduced based on the conventional Zn-Al-Ag-Cu alloy system in the brazing filed, so that the cleanness of the wire can be improved, the quality and the reliability of a brazing joint are ensured, and the intercrystalline corrosion resistance of the wire can be greatly improved, and as a result, the phenomenon of 'embrittlement' can be delayed or inhibited.

The invention discloses a CsF-RbF-AlF3 brazing flux containing nano rare-earth fluoride. The CsF-RbF-AlF3 brazing flux is characterized by comprising the following chemical components, by weight percent (wt.%), 0.02-0.2% of rubidium fluoride (RbF), 20.0-48.0% of cesium fluoride (CsF), 0.01-2.0% of aluminum oxide (Al2O3), 0.01-1.0% of potassium fluoride (KF), 0.001-0.05% of nano ceric fluoride (CeF4), and the balance aluminum fluoride (AlF3). The CsF-RbF-AlF3 brazing flux has higher activity than the existing brazing flux, and can meet the brazing requirements of aluminum-steel, aluminum-copper and aluminum-aluminum structures simultaneously.

The invention relates to a method for preparing chlorine fluorine cyclopentene isomeride in the formula (II) (please see the formula in the specification). The chlorine fluorine cyclopentene isomeride is obtained with chlorine fluorine cyclopentene in the formula (I) (please see the formula in the specification) as the raw material in solvent dimethylformamide, dimethyl sulfoxide or sulfolane by conducting an isomerization reaction in catalysts ammonium fluoride, ammonium bifluoride, potassium fluoride, lithium fluoride, sodium fluoride, rubidium fluoride or cesium fluoride. The technological method is little in raw material toxicity and mild in reaction conditions, the reaction is easy to control, the isomeride yield of chlorine fluorine cyclopentene is high, and industrialization is easy.

The invention relates to a brazing flux suitable for brazing aluminium and steel, and belongs to the field of non-metallic brazing materials. The brazing flux comprises the following components in percent by mass: 0.001-0.01 percent of rubidium fluoride, 11.0-45.0 percent of cesium fluoride, 0.01-2.0 percent of aluminium hydroxide, 0.01-5.0 percent of potassium fluoride, 0.01-0.04 percent of zinc fluoride, and the balance of aluminum fluoride. The brazing flux can meet the requirements of aluminium-steel brazing, aluminium-copper brazing and aluminium-aluminium brazing synchronously and is high in activity.

The invention discloses a caesium rubidium soldering flux containing gallium oxide, belonging to the brazing material field of non-metallic materials. The caesium rubidium soldering flux containing gallium oxide is characterized in that the caesium rubidium soldering flux containing gallium oxide comprises the following components in proportion in mole number: 0.12-0.5 mole of rubidium fluoride (RbF), 0.12-0.5 mole of cesium fluoride (CsF), 0.001-0.2 mole of aluminium oxide (Al2O3), 0.001-0.02 mole of potassium fluoride (KF), 0.0001-0.02 mole of gallium oxide (Ga2O3), and 0.159-0.479 mole of aluminium fluoride (AlF3). According to the caesium rubidium soldering flux containing the gallium oxide, the requirement on brazing the aluminium-copper, the aluminium-steel and the aluminium-aluminium can be satisfied simultaneously and the caesium rubidium soldering flux containing gallium oxide has high activity.

The invention relates to medium-temperature type anti-corrosion fluoroaluminate soldering flux and a preparation method thereof. The soldering flux takes lithium-settling mother liquor obtained by extracting lithium from Jiangxi lepidolite as a base solution; the base solution is subjected to impurity removal to obtain a solution rich in k, Rb and Cs as a raw material solution; one or more of aluminum fluoride, potassium fluoride, rubidium fluoride and cesium fluoride are dosed and added to prepare mixed type soldering flux; the added metal salts can be extracted from the lepidolite. The lepidolite is rich in rubidium and cesium, so that the production cost of the novel soldering flux is greatly reduced, and the Jiangxi lepidolite realizes resource maximum utilization. The medium-temperature type anti-corrosion fluoroaluminate soldering flux is suitable for welding aluminum alloy and high-magnesium alloy, and has special activity on alloy with high magnesium content.