Method for preparing powder material

Abstract

A method for preparing a powder material. The invention belongs to the technical field of powder materials and particularly relates to the method for preparing the powder material. The method for preparing the powder material, provided by the invention, is good in stability. The method adopts the following steps: (1) preparing a 0.5mol / L NaCO3 solution and a 0.5mol / L SrCl2 solution, preparing strontium carbonate respectively by using a pipeline type precipitation reactor method and the conventional positive precipitation method, and carrying out determination and comparison on grain size distribution and morphology size on produced strontium carbonate; and (2) adopting the pipeline type precipitation reactor method, enabling the NaCO3 solution and the SrCl2 solution to enter a pipeline from a charging opening respectively through a constant-pressure high-level tank, subjecting the two kinds of liquid materials to instant hybrid reaction in the pipeline under the high-speed rotation of an impeller so as to produce SrCO3 precipitates, discharging the SrCO3 precipitates into a stirring and heating beaker from an open lower discharging opening, and carrying out stirring for 30 minutes at the reaction temperature of 50-60 DEG C.

Description

technical field [0001] The invention belongs to the technical field of powder materials, in particular to a method for preparing powder materials. Background technique [0002] The industrial method of obtaining inorganic powder materials through liquid phase precipitation reaction is generally carried out in a reaction kettle. Regardless of the feeding methods such as forward addition, reverse addition, or simultaneous addition, with the continuous addition of the reaction solution, the formation of crystal nuclei and the growth of crystals often proceed simultaneously, and the crystal nuclei formed earlier will grow into larger particles, and then form The final particle size of the crystal nuclei is small, so that the total particle size of the finished powder crystals is uneven, and the particle size distribution is wide. In addition, most of the feeding process is controlled manually, and the human factors of flow rate control are more likely to lead to product particle...

AI Technical Summary

Problems solved by technology

Regardless of the feeding methods such as forward addition, reverse addition, or simultaneous addition, with the continuous addition of the reaction solution, the formation of crystal nuclei and the growth of crystals often proceed simultaneously, and the crystal nuclei formed earlier will grow into larger particles, and then form The final particle size of the crystal nuclei is small, so that the total particle size of the finished powder crystals is uneven, and the particle size distribution is wide. In addition, most of the feeding process is controlled manually, and the human factors of flow rate control are more likely to lead to product particles. Wider distribution and poor product batch stability

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