42 results about "Terbium chloride" patented technology

The invention discloses water-soluble rare-earth terbium ion-doped cerium fluoride nanocrystallines and a preparation method thereof, and belongs to the technical field of fluorescent nano-crystalline materials and hydrothermal chemical method synthesis thereof. The rare-earth terbium ion-doped cerium fluoride nanocrystallines are rod-shaped or cube-like; and the polyethyleneimine is coated on the surfaces of the nanocrystallines. The preparation method comprises the following steps of: mixing cerium nitrate hexahydrate, terbium chloride hexahydrate, the polyethyleneimine and ethylene glycol in a certain ratio; reacting for 1 to 12 hours in a baking oven at the temperature of 160 to 240 DEG C; cooling a reaction product; washing the reaction product with water and ethanol; and drying in vacuum. The product has very high solubility, adjustable and controllable appearance, high particle stability and high fluorescence quantum yield, and also can be dispersed in different solvents. In the method, raw materials are cheap and easy to obtain; the process is simple; the cost is low; the process repeatability is high; and the nanocrystallines have a potential application value in the field of biomarkers.

The invention discloses a waterborne potassium silicate zinc-rich primer capable of preventing easy cracking and applied to surface treatment of a steel structure. The zinc-rich primer is prepared from the following raw materials in parts by weight: 106-108 parts of flake zinc powder, 13-15 parts of potassium silicate, 6.4-7.4 parts of a styrene-acrylic emulsion, 1.4-1.6 parts of grape seed oil, 3.5-4.2 parts of amino propyl trimethoxy silane, 1.3-1.6 parts of terbium chloride, 6-8 parts of anti-crack fibers, 2-3 parts of paraffin, 9-10 parts of stainless steel powder, 0.8-1.2 parts of tallow amine, 2.4-2.7 parts of nano aluminum nitride, 0.3-0.5 part of boric acid and 24-26 parts of de-ionized water. According to the zinc-rich primer provided by the invention, the styrene-acrylic emulsion, which is modified by virtue of waterborne epoxy resin emulsion and the grape seed oil, is added to the raw materials and is combined with the potassium silicate solution, so that a binding agent is formed, the flask zinc powder, which is modified by virtue of silane doped rare earth, is taken as a pigment, and other effective adjuvants are combined, so that the prepared zinc-rich primer has the advantages of being good in dispersibility, strong in film adsorbability, long in period of preventing corrosion and the like, and the zinc-rich primer cannot get cracked easily after being dried.

The invention discloses a preparation method of terbium oxide with D50 being 2-3 microns. The preparation method concretely comprises the following steps of firstly, preparing an oxalic acid solution,adding polyethylene glycol 20000 with a set mass ratio, performing stirring until uniform dispersion, then slowly dropwise adding a terbium chloride solution with the concentration being 0.20.4mol / Lwhile performing stirring, performing ageing for 4-5 hours at 0-5 DEG C, then performing suction filtration and washing with the washing temperature being larger than 95 DEG C, performing dry filtering after washing to obtain precipitates, and searing the precipitates for 3-5 houses at 850-900 DEG C to prepare the terbium oxide with D50 being 2-3 microns. The prepared terbium oxide with a specificparticle size range can further improve some defects of some lithium iron phosphate materials and thus effectively improves the specific capacity, the cycling stability, the discharge rate and the like of a battery; and the terbium oxide with the particle size expresses better chemical performance and electronic performance in doping and improvement of lithium battery cathode materials.

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 discloses water-soluble rare-earth terbium ion-doped cerium fluoride nanocrystallines and a preparation method thereof, and belongs to the technical field of fluorescent nano-crystalline materials and hydrothermal chemical method synthesis thereof. The rare-earth terbium ion-doped cerium fluoride nanocrystallines are rod-shaped or cube-like; and the polyethyleneimine is coated on the surfaces of the nanocrystallines. The preparation method comprises the following steps of: mixing cerium nitrate hexahydrate, terbium chloride hexahydrate, the polyethyleneimine and ethylene glycol in a certain ratio; reacting for 1 to 12 hours in a baking oven at the temperature of 160 to 240 DEG C; cooling a reaction product; washing the reaction product with water and ethanol; and drying in vacuum. The product has very high solubility, adjustable and controllable appearance, high particle stability and high fluorescence quantum yield, and also can be dispersed in different solvents. In the method, raw materials are cheap and easy to obtain; the process is simple; the cost is low; the process repeatability is high; and the nanocrystallines have a potential application value in the field of biomarkers.

The invention relates to the technical field of chemical industry, and specifically discloses a fluorescent substance based on an amino acid deep eutectic solvent and a preparation method thereof. The fluorescent substance based on amino acid deep eutectic solvent includes the following components: deep eutectic solvent and rare earth chloride, the mass ratio of the deep eutectic solvent to rare earth chloride is 10-20:1, the rare earth chloride The compound is at least one of europium chloride, lanthanum chloride, terbium chloride or gadolinium chloride, and the deep eutectic solvent is composed of an alcohol compound and an amino acid with a molar ratio of 5-10:1. The fluorescent substance based on the amino acid deep eutectic solvent provided by the invention can achieve a uniform light-inducing effect, has good quality and thermal stability, and is environmentally friendly.

The invention relates to a method for preparing a rare-earth metal terbium thin film through low-cost electrochemical deposition, and belongs to the field of rare-earth metal low-temperature electrodeposition. The method for preparing the rare-earth metal terbium thin film through low-cost electrochemical deposition is characterized by comprising the following process steps: lithium nitrate is dissolved in DMI to obtain a DMI electrolyte of the lithium nitrate, the DMI electrolyte of the lithium nitrate is placed into an electrolytic bath, then anhydrous terbium chloride is added into the electrolytic bath, stirring and mixing are carried out in the electrolytic bath, thus the DMI electrolyte of the lithium nitrate and the anhydrous terbium chloride form a uniform system, the temperature of the whole system is controlled to be 25-80 DEG C, and the electrolytic voltage range is minus 2.0-minus 2.4 V vs Ag; and in the electrodeposition process, anhydrous terbium chloride is replenished into the electrolytic bath every a period of time, and the molar concentration of the terbium chloride is controlled to be the initial concentration + / -2%. According to the method, energy consumption and the production cost are lowered remarkably while the rare-earth metal terbium film is prepared efficiently.

The invention relates to a luminescent material with cyclotriphosphazene cross-linked rare-earth complexes and a method for preparing the luminescent material. A general structural formula of the cyclotriphosphazene cross-linked rare-earth complexes is shown. Hexa-(4-potassium formate based phenoxy) cyclotriphosphazene is used as ligand and reacts with terbium chloride and europium chloride to obtain the cyclotriphosphazene cross-linked rare-earth complexes. The luminescent material and the method have the advantages that the complexes are of cross-linked netted structures, rare-earth ions are appropriately spaced from one another, and accordingly concentration quenching of the rare-earth ions can be prevented; each single molecule is provided with multiple luminescent centers, and accordingly the complexes are excellent in luminescent performance.

The invention belongs to the field of low-temperature electrochemical extraction and particularly relates to a method for preparing an aluminum-based rare earth alloy through near-room-temperature electrolysis. The method for preparing the aluminum-based rare earth alloy through near-room-temperature electrolysis is an electrolytic method, and a electrolyte adopted by the electrolytic method is formed by rare earth chloride and ionic liquid, wherein the ionic liquid accounts for 96-98% of the total mass of the electrolyte, the rare earth chloride accounts for 2-4% of the total mass, and the rare earth chloride is one of neodymium chloride, lanthanum chloride, cerium chloride, scandium chloride, yttrium chloride, praseodymium chloride, samarium chloride, europium chloride, gadolinium chloride and terbium chloride. According to the technological for preparing the aluminum-based rare earth alloy through near-room-temperature electrolysis, operation is easy, and cost is low; and the technological reserve and theoretical support are provided for green extraction of the low-cost aluminum-based rare earth alloy.