Plasma spraying pyrolyzing process of preparing nanometer hollow oxide microsphere powder

Abstract

The plasma spraying and pyrolyzing process of preparing nanometer hollow microsphere powder of nanometer crystalline oxide includes preparing precursor solution, atomizing, plasma spraying and pyrolyzing in plasma flame to form solid molten drop, and cooling in liquid to solidify form the hollow spherical nanometer crystal structure. The process is simple and suitable for industrial production.

Description

technical field

[0001] The invention relates to the technical field of powder preparation, in particular to a method for preparing nanometer oxide hollow microsphere powder by using plasma flame high-temperature spray pyrolysis. Background technique

[0002] There are many methods for preparing hollow microspheres, which are mainly divided into two categories: template method and non-template method. Template methods are further divided into deposition and surface reaction methods, layer-by-layer assembly methods, microencapsulation methods, etc.; non-template methods are divided into droplet methods, spray drying methods, and emulsion / phase separation methods. Among them, the template method is difficult to control the experimental conditions so that the shell precursor can be effectively and uniformly precipitated and deposited on the surface of the latex particle template, and the operation process is often complicated, and the resulting hollow spheres have a large partic...