Method of burning gel of stearic acid for preparing Nano LaCo03 in type of perovskite

[0023] Weigh a certain amount of lanthanum nitrate, cobalt nitrate, and stearic acid respectively so that the molar ratio is 1:1:10. First, under the condition of constant temperature oil bath heating, stearic acid is dissolved, under constant temperature magnetic stirring, the solid mixture of lanthanum nitrate and cobalt nitrate is dissolved in molten stearic acid, the temperature is controlled at 115 ° C, and the reaction time is 3 hours. into a gel. The gel was burned at 450°C. After burning, the product was taken out and ground and put into a muffle furnace, and calcined at 850°C for 3 hours to obtain the following: image 3 The nanopowder LaCoO shown 3 . The shape is spherical, the particle size distribution is uniform, and the size is about 10nm-30nm.

[0025] Weigh a certain amount of lanthanum nitrate, cobalt nitrate, and stearic acid respectively so that the molar ratio is 1:1:11.2. First, under the condition of constant temperature oil bath heating, stearic acid is dissolved, and under constant temperature magnetic stirring, the solid mixture of lanthanum nitrate and cobalt nitrate is dissolved in molten stearic acid, the temperature is controlled at 113 ° C, and the reaction time is 3 hours. turns into a gel. The gel was burned at 450°C. After burning, the product was taken out and ground and put into a muffle furnace, and calcined at 850°C for 3 hours to obtain the following: Figure 4 Medium and nanometer powder LaCoO 3. The shape is spherical, the particle size distribution is uniform, and the size is about 10nm-20nm.