A kind of method for preparing slyton perovskite type nitrogen oxide powder
A nitrogen oxide and perovskite-type technology, which is applied in chemical instruments and methods, tantalum compounds, inorganic chemistry, etc., can solve the problems of time-consuming and limited production of SLYTON powder, and achieve good dispersion, low impurity content, The effect of high purity
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Embodiment 1
[0031] Put strontium nitrate, lanthanum nitrate, yttrium nitrate, tantalum pentachloride and urea in a molar ratio of 1:1:1:1:20, accurately weigh them and put them into methanol aqueous solution (alcohol-water volume ratio 1:1) and stir to dissolve , the time is greater than 30 minutes. The above-mentioned mixture is directly put into the muffle furnace after being packed into a large crucible, the heating rate of the programmed temperature rise is 10°C / min, the high temperature setting temperature is 800°C, and the holding time of the high temperature stage is 4h. After natural cooling, the Get precursors. The precursor is nitrided in an ammonia atmosphere, the nitriding temperature is 850°C, and the time is 6 hours. After cooling, SLYTON powder is obtained. The purity of its products is not less than 99.86%, and the impurity content: carbon is less than 0.12%; chlorine is less than 0.01%.
Embodiment 2
[0033] Put strontium nitrate, lanthanum nitrate, yttrium nitrate, tantalum pentachloride and urea in a molar ratio of 1:1:1:1:50, accurately weigh them and put them into methanol aqueous solution (volume ratio of alcohol to water: 2:1) and stir to dissolve , the time is greater than 30 minutes. The above-mentioned mixture is directly put into the muffle furnace after being packed into a large crucible, the heating rate of the programmed temperature rise is 10°C / min, the high temperature setting temperature is 800°C, and the holding time of the high temperature stage is 6h. After natural cooling, the Get precursors. The precursor is nitrided in an ammonia atmosphere, the nitriding temperature is 850°C, and the time is 7 hours. After cooling, SLYTON powder is obtained. The purity of its products is not less than 99.85%, and the impurity content: carbon is less than 0.13%; chlorine is less than 0.01%.
Embodiment 3
[0035] Put strontium nitrate, lanthanum nitrate, yttrium nitrate, tantalum pentachloride and citric acid in a molar ratio of 1:1:1:1:20, accurately weigh them and put them into methanol aqueous solution (alcohol-water volume ratio 1:1) and stir Dissolved for more than 30 minutes. The above-mentioned mixture is directly put into the muffle furnace after being packed into a large crucible, the heating rate of the programmed temperature rise is 10°C / min, the high temperature setting temperature is 800°C, and the holding time of the high temperature stage is 4h. After natural cooling, the Get precursors. The precursor is nitrided in an ammonia atmosphere, the nitriding temperature is 850°C, and the time is 6 hours. After cooling, SLYTON powder is obtained. The purity of its products is not less than 99.84%, and the impurity content: carbon is less than 0.14%; chlorine is less than 0.01%.
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