Preparation method of spherical yttrium oxide powder

Abstract

The invention relates to a preparation method of spherical yttrium oxide powder, and relate to a preparation method of yttrium oxide powder. The method comprises the following steps: adding a surfactant in an aqueous solution containing yttrium salt and a precipitating agent to prepare a reaction solution, wherein the yttrium salt concentration in the reaction solution is 0.05-0.1 mol.L<-1>, employing a homogeneous precipitation method to prepare a yttrium oxide precursor precipitate, after solid-liquid separating, respectively washing the precipitate by water and small molecular alcohol, processing precipitate suspending liquid by using ultrasonic dispersion, separating the suspending liquid, drying the material, and calcining the material to obtain the yttrium oxide powder composed by submicron spherical particles. The yttrium salt solution with concentration of 0.05-0.1 mol.L<-1> is taken as a reaction solution, production efficiency of yttrium oxide is obviously increased, precipitating agent amount is obviously reduced, production cost is reduced, waste water volume is reduced, and the method is in favor of the protection environment, has simple process, and is convenient for popularization and usage.

Description

technical field [0001] The invention relates to a method for preparing yttrium oxide powder, in particular to a method for preparing spherical particle yttrium oxide powder with a submicron particle size. Background technique [0002] As an important rare earth compound, yttrium oxide has unique optical and physical and chemical properties, and is widely used in advanced ceramic materials, fluorescent materials, catalysis, lasers, material doping and other fields. After the spheroidization of yttrium oxide powder particles, it has higher specific surface area, surface atomic number, surface energy, better fluidity and dispersion, and will have a broader application space. The method for preparing spherical yttrium oxide powder has been reported in the literature, and the application number is 201110100222.7 patent application has announced "a method for preparing nano-spherical yttrium oxide powder for thermal spraying". In this method, the yttrium oxide precursor prepared b...

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Problems solved by technology

The application number is 200910198286.8 patent application published "a preparation method of spherical, monodisperse single-size yttrium oxide nanopowder", the method uses yttrium nitrate or yttrium chloride solution and urea reaction to prepare yttrium oxide precursor, but the concentration 0.005-0.04 mol / liter, because the concentration of yttrium salt is too small, the output of yttrium oxide obtained in unit container is too low, which is not conducive to industrial production application; in addition, in this method, the consumption of urea is 40 times of the amount of yttrium ion substance to 120 times, the utilization rate of urea is too low, and the production cost is high; the ammonia nitrogen content in the production wastewater is also too high, and the pollution to the environment is relatively large

CN104445343A and CN104445345A respectively disclose "a method for synthesizing nanometer yttrium oxide powder". Industrial production is more difficult; ② When preparing the yttrium oxide precursor, the reaction time is 20 hours to 30 hours, the energy consumption of industrial production is large, and the production efficiency is low

③ When preparing the yttrium oxide precursor, sodium hydroxide solution is used as the precipitant, and the sodium ions in it are difficult to wash out from the precipitate, and the sodium ions remaining in the yttrium oxide precursor are difficult to remove during the roasting process, which will affect product quality

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