Preparation method of indium oxide ultrafine powder
An ultra-fine powder, indium oxide technology, applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the high requirements of gas phase method equipment parameters, the particle size of nanoparticles is not uniform, and cannot be used. Industrial mass production and other problems, to achieve the effect of reducing the process of preparing precursors, narrowing the particle size distribution range, and low production costs
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Embodiment 1
[0019] The preparation method of indium oxide ultrafine powder, see figure 1 ,Specific steps are as follows:
[0020] (1) Prepare a sulfuric acid solution with an acidity of 30g / l, add it to a 3L autoclave, then add 140g of indium flowers, the liquid-solid mass ratio is 14:1, seal the lid and ventilate oxygen to a pressure of 1.5MPa in the autoclave, heat and control the reaction temperature At 200±5°C, the reaction time is 12 hours;
[0021] (2) After the reaction is completed, the liquid and solid are separated to obtain the reaction residual acid and the intermediate product indium oxide synthesized by the reaction. The reaction residual acid contains 22.52g / l of sulfate radicals and In0.016g / l, and the reaction residual acid is added with sulfuric acid to return to the pressure The kettle continues to be used for subsequent synthesis reactions. The solid part, the intermediate product indium oxide, is neutralized and washed by adding ammonium bicarbonate aqueous solution ...
Embodiment 2
[0024] The preparation method of indium oxide superfine powder is as follows:
[0025] (1) Prepare a sulfuric acid solution with an acidity of 100g / l, add it to the autoclave, then add 400g of indium flowers, the liquid-solid mass ratio is 5:1, cover the lid and ventilate oxygen to the pressure inside the autoclave to 2MPa, heat and control the reaction temperature at 150 ±5°C, reaction time 10 hours;
[0026] (2) After the reaction is completed, the liquid and solid are separated to obtain the reaction residual acid and the intermediate product indium oxide synthesized by the reaction. The reaction residual acid contains 89.64g / l of sulfate radicals and In0.028g / l, and the reaction residual acid is added with sulfuric acid to return to the pressure The kettle continues to be used for subsequent synthesis reactions. The solid part, the intermediate product indium oxide, is neutralized and washed by adding ammonium bicarbonate aqueous solution to remove residual sulfuric acid, ...
Embodiment 3
[0029] The preparation method of indium oxide superfine powder is as follows:
[0030] (1) Prepare a sulfuric acid solution with an acidity of 200g / l, add it to the autoclave, then add 300g of indium powder, the liquid-solid mass ratio is 8:1, seal the lid and pass oxygen to the pressure of 3MPa in the autoclave, heat and control the reaction temperature at 300 ±5°C, reaction time 4 hours;
[0031] (2) After the reaction is completed, the liquid and solid are separated to obtain the reaction residual acid and the intermediate product indium oxide synthesized by the reaction. The reaction residual acid contains 189.52g / l of sulfate radicals and In0.058g / l. Add sulfuric acid to the reaction residual acid and return to the pressure The kettle continues to be used for subsequent synthesis reactions. The solid part, the intermediate product indium oxide, is neutralized and washed by adding ammonium bicarbonate aqueous solution to remove residual sulfuric acid, centrifugally filtere...
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