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

A technology of spray pyrolysis and zirconium powder, which is applied in the direction of final product manufacturing, sustainable manufacturing/processing, fuel cells, etc., can solve problems such as uneven distribution, high raw material cost, and complicated operation, and achieve uniform composition and low raw material cost , the effect of simple operation

Inactive Publication Date: 2020-05-29
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 t

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

Examples

Experimental program
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Example Embodiment

[0028] Example 1:

[0029] The scandium nitrate aqueous solution and the zirconium nitrate aqueous solution are mixed to obtain a scandium-zirconium mixed solution; after the scandium-zirconium mixed solution is atomized into fine droplets, they are carried into the high-temperature reaction furnace by the flow of carrier gas. It goes through the steps of solvent evaporation, solute precipitation, drying, metal salt thermal decomposition and sintering in order, and finally the scandium zirconium powder is formed. Wherein, the cation concentration in the scandium-zirconium mixed solution is 0.5 mol / L, and the number of moles of scandium ions is 8% of the total number of moles of scandium ions and zirconium ions. The ultrasonic nozzle power is 30W, the carrier gas flow rate is 30L / min, and the spray pyrolysis temperature is 1200℃.

Example Embodiment

[0030] Example 2:

[0031] The scandium chloride aqueous solution and the zirconium oxychloride aqueous solution are mixed to obtain a scandium-zirconium mixed solution; after the scandium-zirconium mixed solution is atomized into fine droplets, they are carried into the high-temperature reaction furnace by the flow of carrier gas, and after the droplets enter the reaction furnace, In a relatively short period of time, the steps of solvent evaporation, solute precipitation, drying, metal salt thermal decomposition and sintering are successively passed through, and finally scandium zirconium powder is formed. Wherein, the cation concentration in the scandium-zirconium mixed solution is 5 mol / L, and the number of moles of scandium ions is 10% of the total number of moles of scandium ions and zirconium ions. The ultrasonic nozzle power is 15W, the carrier gas flow is 20L / min, and the spray pyrolysis temperature is 1400℃.

Example Embodiment

[0032] Example 3:

[0033] The scandium chloride aqueous solution and the zirconium oxychloride aqueous solution are mixed to obtain a scandium-zirconium mixed solution; after the scandium-zirconium mixed solution is atomized into fine droplets, they are carried into the high-temperature reaction furnace by the flow of carrier gas, and after the droplets enter the reaction furnace, In a relatively short period of time, the steps of solvent evaporation, solute precipitation, drying, metal salt thermal decomposition and sintering are successively passed through, and finally scandium zirconium powder is formed. Wherein, the cation concentration in the scandium-zirconium mixed solution is 2mol / L, and the moles of scandium ions are 13% of the total moles of scandium ions and zirconium ions. The ultrasonic nozzle power is 10W, the carrier gas flow rate is 10L / min, and the spray pyrolysis temperature is 400℃.

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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...

Claims

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Application Information

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IPC IPC(8): C04B35/626C04B35/48H01M8/1253
CPCC04B35/62675C04B35/6267C04B35/48H01M8/1253C04B2235/3224C04B2235/5445Y02E60/50Y02P70/50
Inventor 李晓艳王玮玮姚心韩国强付云枫刘国
Owner CHINA ENFI ENGINEERING CORPORATION
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