Preparation of layered perovskite YBa2Cu3O7 hollow spherical and porous micron particle
A micro-particle, perovskite-type technology, used in chemical instruments and methods, titanium compounds, inorganic chemistry, etc.
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Embodiment 1
[0016] Example 1: Under normal temperature, normal pressure and magnetic stirring conditions, 0.02mol BaCO 3 Dissolve in 20ml of 0.06mol citric acid aqueous solution, stir magnetically (500 rpm) until completely dissolved, add 0.01mol Y(NO 3 ) 3 ·6H 2 O and 0.01mol Cu(NO 3 ) 2 ·3H 2 O, continue to stir until dissolved. In addition, add ethylenediamine (analytical pure) solution slowly dropwise to the above mixed solution to form a precipitate immediately, continue to add dropwise, the precipitate dissolves, adjust the pH value to 7, and after continuous stirring, transfer it to a liner lined with polytetrafluoroethylene Put it into a 50ml stainless steel reaction kettle (80% volume filling), put it in a thermostat at 180°C for 12h, then cool to room temperature, take it out, and dry it (80°C, 12h). Place the obtained solid powder in a muffle furnace, raise the temperature from room temperature to 400°C at a rate of 1°C / min and keep it at 400°C for 1 hour, then continue t...
Embodiment 2
[0017] Example 2: First prepare a copper oxide precursor. Under the conditions of normal temperature, normal pressure and magnetic stirring, 0.03mol copper nitrate and 1.2mol sodium hydroxide were dissolved in 30ml absolute ethanol and 60ml deionized water respectively, then the copper nitrate solution was slowly added to the sodium hydroxide solution, magnetic After stirring (500 rpm) for 30 minutes, transfer it to a 50ml stainless steel reaction kettle lined with polytetrafluoroethylene, place it in a constant temperature box at 100°C for 12 hours, then cool to room temperature, and then wash with absolute ethanol and deionized water for two times, and dried (60°C, 24h) to produce copper oxide particles, which were used as the preparation layered perovskite oxide YBa 2 Cu 3 o 7 Precursors for porous microparticles. Under normal temperature, normal pressure and magnetic stirring conditions, weigh 0.06mol of citric acid, dissolve it in 20ml of deionized water, and under con...
Embodiment 3
[0018] Example 3: Preparation of yttrium oxide precursor. Under the conditions of normal temperature, normal pressure and magnetic stirring, 10g of yttrium oxide (A.R.) was dissolved in a small amount of hydrochloric acid, then poured into 30ml of deionized water, and 0.15g of polyethylene glycol (average molecular weight was 4000, A.R.) was added thereto, After stirring evenly, 10 mol / l sodium hydroxide aqueous solution was added dropwise to adjust the pH to 10. After the precipitation is complete, wash with deionized water, filter with suction, dry and grind, then heat the precipitate from room temperature to 700°C at a rate of 3°C / min and keep the temperature at this temperature for 3h to obtain yttrium oxide particles. This is used as the preparation of layered perovskite oxide YBa 2 Cu 3 o 7 Precursors for porous microparticles. Under normal temperature, normal pressure and magnetic stirring conditions, 0.02mol BaCO 3 Dissolve in 20ml of 0.06mol citric acid aqueous s...
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