Method for preparing scandium-zirconium powder through spray pyrolysis and scandium-zirconium powder prepared through method

Abstract

The invention provides a method for preparing scandium-zirconium powder through spray pyrolysis and the scandium-zirconium powder prepared through the method. The method comprises the following steps:mixing a scandium-containing solution and a zirconium-containing solution to obtain a scandium-zirconium mixed solution; and carrying out spray pyrolysis on the scandium-zirconium mixed solution to obtain scandium-zirconium powder. The scandium-zirconium powder is prepared by adopting a spray pyrolysis method. After the scandium-zirconium mixed solution is atomized into fine liquid drops, the fine liquid drops are brought into a high-temperature reaction furnace through carrier gas flowing. After the liquid drops enter the reaction furnace, the steps of solvent evaporation, solute precipitation, drying, metal salt thermal decomposition, sintering forming and the like are sequentially carried out within a short time, and finally powder particles are formed. The whole process is rapidly completed, the collision probability of the particles in the hearth is very small, and the collision time is short, so that the agglomeration phenomenon can be effectively reduced, and the obtained scandium-zirconium powder particles are fine, uniform in composition and good in dispersity. Meanwhile, the method has the advantages of controllable product particle composition, continuous production, simple operation and low raw material cost.

Description

technical field [0001] The invention relates to the technical field of solid electrolyte materials, in particular to a method for preparing scandium-zirconium powder by spray pyrolysis and the scandium-zirconium powder prepared by the method. Background technique [0002] Solid oxide fuel cell (SOFC) is an efficient and clean energy conversion device, and the electrolyte as its key component is a hot research topic at present. Traditional yttria-stabilized zirconia (YSZ) electrolytes generally operate at high temperatures of 1000 °C or above to obtain high power conversion efficiency. Such high operating temperatures will lead to serious interface reactions and failure of battery components. Scandia-stabilized zirconia (scandium-zirconium powder) is currently the electrolyte material with the highest oxygen ion conductivity among zirconium-based electrolytes, and its conductivity at 800 ° C is about twice that of YSZ, making it the preferred electrolyte for medium and low te...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for preparing scandium-zirconium powder by spray pyrolysis and the scandium-zirconium powder prepared by the method, so as to solve the problem of excessive particle size and uneven distribution in the preparation of scandium-zirconium powder in the prior art. Uniformity or high cost of raw materials, complex operation and other issues

Images