Preparation method of nanoscale spherical yttrium oxide powder

Abstract

The invention relates to a preparation method of yttrium oxide powder, in particular to a preparation method of nanoscale spherical yttrium oxide powder. According to the method, a precipitant solution with the concentration ranging from 0.5 mol.L<-1> to 0.1 mol.L<-1> is added to a yttrium salt aqueous solution with the concentration ranging from 0.05 mol.L<-1> to 0.1 mol.L<-1> and stirred to be dissolved, a mixed solution is obtained, surfactants accounting for 0.2%-2% of the mixed solution in mass are added, a yttrium oxide precursor precipitate is prepared, the precipitate is washed with water and small molecule alcohol after solid-liquid separation, a precipitate turbid liquid is dispersed by ultrasonic waves, and the yttrium oxide powder comprising nanoscale spherical particles is prepared through separation, drying and roasting, wherein the surfactants comprise a cationic surfactant and a non-cationic surfactant. With the method, the production efficiency of yttrium oxide can be significantly improved, the use quantity of precipitants is reduced, the production cost is low, the wastewater discharge volume is small, environmental protection is facilitated, and the method is simple and convenient to popularize and use.

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 particle size of nanometer. 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 of preparing nano-scale spherical yttrium oxide powder has been reported in the literature. Among them, the application number is 201110100222.7 patent application has announced "a method for preparing nano-spherical yttrium oxide powder for thermal spraying". After sieving the yttrium precur...

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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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