The preparation method of slston perovskite type nitrogen oxide solid solution powder
An oxynitride, perovskite-type technology, applied in chemical instruments and methods, tantalum compounds, inorganic chemistry, etc., can solve the problems of limiting the production of SLSTON powder, taking a long time, etc., to meet the requirements, low preparation cost, and high purity. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0026] The invention provides a preparation method of SLSTON perovskite nitrogen oxide solid solution powder, which uses soluble strontium salt, lanthanum salt, scandium salt, tantalum salt and combustion auxiliary agent as raw materials, and the raw materials are mixed in alcohol water according to a certain molar ratio. Fully dissolve in the mixed solution, then after cross-linking reaction at a certain temperature, grind to make it fully mixed evenly, and then calcine the cross-linked product at high temperature to form a precursor, and then nitrogenize the precursor under ammonia gas at high temperature to obtain SLSTON Powder (perovskite nitrogen oxide solid solution Sr 0.5 La 0.5 sc 0.5 Ta 0.5 o 2.5 N 0.5 , abbreviated as SLSTON), its preparation steps are:
[0027] (1) Weigh soluble strontium salts, lanthanum salts, scandium salts, tantalum salts and combustion aids according to a certain molar ratio, and dissolve them fully in the alcohol-water mixed solution for ...
Embodiment 1
[0041] Accurately weigh strontium nitrate, lanthanum nitrate, scandium nitrate, tantalum pentachloride and urea in a molar ratio of 1:1:1:1:10, and put them into methanol aqueous solution (volume ratio 1:1) and stir to dissolve. more than 30 minutes. The solution was subjected to a cross-linking reaction at 50°C for 10 hours, then put into a mortar and ground finely, and the grinding time was 30 minutes. Put the above-mentioned cross-linked product mixture into a crucible and put it into a box-type resistance furnace for calcination reaction. The reaction temperature is 800° C. and the reaction time is 24 hours. After the reaction, it was naturally cooled to room temperature, and the product was nitrided in an ammonia atmosphere at a temperature of 900°C for 48 hours. After cooling, SLSTON powder was prepared. The purity of its products is not less than 99.72%, and the impurity content: carbon is less than 0.19%; chlorine is less than 0.04%.
Embodiment 2
[0043] Accurately weigh strontium nitrate, lanthanum nitrate, scandium nitrate, tantalum pentachloride and urea in a molar ratio of 1:1:1:1:10, and put them into ethanol aqueous solution (volume ratio 1:1) and stir to dissolve. more than 30 minutes. The solution was subjected to a cross-linking reaction at 50°C for 10 hours, then put into a mortar and ground finely, and the grinding time was 30 minutes. Put the above-mentioned cross-linked product mixture into a crucible and put it into a box-type resistance furnace for calcination reaction. The reaction temperature is 800° C. and the reaction time is 24 hours. After the reaction, it was naturally cooled to room temperature, and the product was nitrided in an ammonia atmosphere at a temperature of 900°C for 48 hours. After cooling, SLSTON powder was prepared. The purity of its products is not less than 99.79%, and the impurity content: carbon is less than 0.19%; chlorine is less than 0.03%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More