42 results about "Terbium chloride" patented technology

The invention discloses a method for infiltrating dysprosium of a neodymium-iron-boron magnet. The method comprises the following steps: S1, taking and smashing neodymium-iron-boron sheets, adding dysprosium oxide powder, and carrying out ball-milling refining, compression molding of a green body, sintering and tempering to obtain the neodymium-iron-boron magnet; S2, taking the neodymium-iron-boron magnet to be washed, and carrying out acid pickling, ethyl alcohol cleaning and drying to complete the pretreatment of the neodymium-iron-boron magnet; S3, ultrasonically dissolving dysprosium chloride, terbium chloride and aluminum chloride into ethyl alcohol respectively, and stirring and mixing with sodium polyacrylate, polyurethane and ethyl alcohol to obtain a dysprosium infiltrated solution; S4, adding a part of the dysprosium infiltrated solution into a container, adding the neodymium-iron-boron magnet, then continuously adding the dysprosium infiltrated solution until the liquid level of the dysprosium infiltrated solution is higher than the interface of the neodymium-iron-boron magnet, heating the container, carrying out heat preservation and then ultrasonic treatment, taking out the neodymium-iron-boron magnet for drying, packaging the neodymium-iron-boron magnet with an iron sheet, carrying out vacuum aging treatment, and cooling to room temperature to complete the dysprosium infiltration of the neodymium-iron-boron magnet. According to the method disclosed by the invention, the using amount of dysprosium is small, the comprehensive utilization rate is high, the permeation effect is good, and the treatment cost is low.

The invention relates to the technical field of chemical engineering and particularly discloses a fluorescent substance based on an amino acid deep eutectic solvent and a preparation method of the fluorescent substance. The fluorescent substance based on the amino acid deep eutectic solvent comprises the following ingredients: the deep eutectic solvent and rare earth chloride at a mass ratio of (10-20):1, wherein rare earth chloride is at least one of europium chloride, lanthanum chloride, terbium chloride or gadolinium chloride; and the deep eutectic solvent comprises an alcohol compound andamino acid at a mole ratio of (5-10):1. The fluorescent substance based on the amino acid deep eutectic solvent can achieve a uniform luminescence effect, and is good in heat stability, green and environmentally friendly.

The invention discloses a method for preparing high-purity terbium oxide, belonging to the technical field of rare-earth separation. The method comprises the following steps of feeding mixed rare-earth oxide, hydrochloric acid and pure water into a container with a stirring device and a heating device, stirring, and filtering so as to obtain a mixed rare-earth chloride solution; adding the mixed rare-earth chloride into another container with a stirring device, and continuously stirring so as to obtain a separated material; by taking the separated material as a raw material, continuously extracting and separating by using a first extraction agent, a caustic soda liquid and a returning fluid so as to obtain a rich terbium chloride solution; by taking the rich terbium chloride solution as another raw material, adding a second extraction agent and the returning fluid, further extracting and separating so as to obtain a high-purity terbium chloride solution; introducing the high-purity terbium chloride solution into a settling pond, and filtering so as to obtain solid oxalate terbium; and introducing the solid oxalate terbium into a roller table type tunnel kiln for firing, controlling the firing temperature and the firing time, discharging from the roller table type tunnel kiln so as to obtain high-purity terbium oxide, wherein the purity of the terbium oxide is 99.9%. The first-pass yield is high, and the preparation cost is low.

The invention provides a rare-earth double-doped functional nanocomposite material and a preparation method thereof. The method comprises the process that a sodium hydroxide solution is added into a rare earth ion solution containing gadolinium chloride, europium chloride and terbium chloride; stirring reaction is performed to obtain a colloidal transparent solution; the solvents of the rare earthion solution and the sodium hydroxide solution are polylol, so that the colloidal transparent solution and coating liquid react under heating condition; transparent suspension with a core-shell structure is obtained; the coating liquid contains 3-aminopropyl triethoxysilane, tetraethyl orthosilicate, water, triethylamine and polylol; impurities in the transparent suspension with the core-shell structure are removed; vacuum drying is performed; then, calcination is performed to obtain a product. Tb<3+> and Eu<3+> lanthanide ions are doped into a Gd2O3 substrate; crystal nucleuses are subjectedto organic polysiloxane layer coating; the problem of low Gd2O3 single-doped fluorescence intensity is solved; the biocompatibility of the material is also improved; the fluorescence lifetime is prolonged.

The invention discloses a chemical constitution of a glass film containing rare earth ion-doped Cs2LiYCl6 microcrystalline and a sol-gel preparation method of the glass film. The glass film is characterized by comprising the following components by mol percent: 71mol%-75mol% of germanium dioxide, 5mol%-10mol% of aluminum sesquioxide, 5mol%-10mol% of phosphorus pentoxide, 8mol%-12mol% of Cs2LiYCl6 and 1mol%-3mol% of rare-earth chloride, wherein rare-earth chloride is one of cerium chloride, europium chloride or terbium chloride. The sol-gel preparation method has the advantages that sol-gel is a low-temperature wet chemical method glass preparation technique, and glass is prepared by virtue of hydrolysis and chemical polymerization reaction of precursor raw materials, and a film material can be prepared under certain liquid viscosity; by virtue of low temperature synthesis conditions, the decomposition and the volatilization of the chloride raw material can be effectively prevented.

The invention discloses a corrosion-resistant PI thrust pad and a preparation method thereof. The corrosion-resistant PI thrust pad is mainly prepared from graphene oxide, chitosan, toluene diisocynate, pyromellitic dianhydride and terbium chloride. Graphene oxide and chitosan are mixed, so the strength and wear resistance of the thrust pad can be improved; meanwhile, chitosan can be protonized by adding acetic acid, so the surface of chitosan is positively charged, the surface has a large number of positive charges, the chitosan can be combined with graphene oxide with electronegativity more easily, and the combination strength is higher; the surface of the thrust pad is treated by perfluorobutane, so that the hydrophilicity of the thrust pad can be reduced, the hydrophobicity of the thrust pad can be improved, and the corrosion resistance of the thrust pad can be improved; and the corrosion-resistant PI thrust pad prepared by the invention has good corrosion resistance, solves the problem of poor transmission efficiency caused by corrosion of the thrust pad in the use process, and has good practicability.

The invention provides a preparation method of high-purity cerium oxide for compact fluorescent lamps. The preparation method includes the steps: treating a to-be-treated sample with sulfuric acid toobtain a primary treatment solution and first solid slag; carrying out a precipitation reaction of the primary treatment solution to obtain a rare earth precipitate containing cerium hydroxide; carrying out a neutralization reaction of the rare earth precipitate with hydrochloric acid to obtain a secondary treatment solution containing rare earth chloride; carrying out primary extraction treatmenton the secondary treatment solution by a first organic extractant, and then carrying out back extraction treatment on an extraction phase obtained in the primary extraction treatment process by a back-extractant, to obtain an extraction residual solution containing cerium chloride and an extraction solution containing terbium chloride; carrying out secondary extraction treatment on the extractionresidual solution with a second organic extractant to obtain a cerium chloride solution; and carrying out precipitation and burning treatment on the cerium chloride solution sequentially to obtain high-purity cerium oxide. The cerium oxide prepared by the method has the advantages of high purity, high direct yield and good environmental protection.

The invention discloses a method for producing terbium oxide and dysprosium oxide, which comprises the following steps of: (1) treating a rare earth chloride liquid, containing terbium and dysprosiumelements and obtained by extracting and separating samarium and europium, through a resin column filled with a crosslinked styrene-divinylbenzene polymer to obtain treated rare earth chloride feed liquid; (2) carrying out dysprosium-holmium extraction, gadolinium-terbium extraction and terbium-dysprosium extraction by taking the treated rare earth chloride feed liquid as a separation feed liquid to obtain a terbium chloride solution and a dysprosium chloride solution; and (3) respectively precipitating and firing the terbium chloride solution and the dysprosium chloride solution to obtain terbium oxide and dysprosium oxide. The content of ytterbium oxide impurities in dysprosium oxide and terbium oxide prepared by the method is low.

The invention discloses a preparation method for a glass film containing rare-earth-ion-doped gadolinium chloride microcrystalline. The technical scheme is characterized in that the preparation raw materials comprise, in percent by mole, 70-74.5 mol% of ethyl orthosilicate, 10-15 mol% of butyl titanate, 10-15 mol% of gadolinium chloride, and 0.5-5 mol% of a rare-earth chloride, wherein the rare-earth chloride is one of europium chloride and terbium chloride. The advantages comprise that a sol-gel technology is a low-temperature wet-chemical-process glass preparation technology, the glass is obtained through hydrolysis of a precursor raw material and a polymerization chemical reaction process, the film material can be prepared under a certain liquid viscosity condition, and the low-temperature synthesis condition is capable of effectively preventing the chloride raw material from being decomposed and volatilized; and because of volatilization and decomposition of the solvent, certain micropores are generated in the glass prepared through the sol-gel method, and the micropores provide good environment for generation of nanometer chloride microcrystalline, and thus crystallized-particle nonuniformity and glass devitrification caused by incomplete uniformity of melt-glass chemical compositions and crystallization processing temperature are overcome to a certain degree.