Method for Synthesizing Lithium Titanate/Titanium Dioxide Composite Nano-polycrystalline Powder Material Using High Temperature and High Pressure Mixed Solvothermal System
A mixed solvent, high temperature and high pressure technology, applied in the field of preparation of composite polycrystalline powder
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Embodiment 1
[0044] 1. Ingredients:
[0045] Mix 70ml of methanol and 30ml of ultrapure water evenly, and then disperse 0.8392g of lithium hydroxide monohydrate and 7.45ml of titanium isopropoxide into the above mixed solvent. Then join in the high-temperature and high-pressure reactor (volume is 250 milliliters) that has temperature measurement, pressure measurement device, seal.
[0046] 2. Use high temperature and high pressure mixed solvent thermal system to implement constant temperature reaction:
[0047] Put the sealed reaction vessel into a muffle furnace, heat it to 380°C (the pressure inside the vessel reaches 31.5MPa), and keep the temperature constant for 2 hours.
[0048] 3. Cooling:
[0049] The reaction kettle was naturally cooled to room temperature (20-25° C.), and the reaction kettle was taken out from the muffle furnace.
[0050] 4. Washing:
[0051] The product was taken out from the reaction kettle, and the product was filtered through a vacuum filter (0.45 nm in a...
Embodiment 2
[0058] 1. Ingredients:
[0059] Mix 70ml of methanol and 30ml of ultrapure water evenly, and then disperse 0.8392g of lithium hydroxide monohydrate and 7.45ml of titanium isopropoxide into the above mixed solvent. Then join in the high-temperature and high-pressure reactor (volume is 250 milliliters) that has temperature measurement, pressure measurement device, seal.
[0060] 2. Use high temperature and high pressure mixed solvent thermal system to implement constant temperature reaction:
[0061] Put the sealed reaction vessel into a muffle furnace, heat it to 340°C (the pressure inside the vessel reaches 22.3MPa), and keep the temperature constant for 2 hours.
[0062] 3. Cooling:
[0063] The reactor was cooled to room temperature (20-25° C.) at a cooling rate of 10° C. / h, and the reactor was taken out of the muffle furnace.
[0064] 4. Washing:
[0065] The product was taken out from the reaction kettle, and the product was filtered through a vacuum filter (0.45 nm in...
Embodiment 3
[0072] 1. Ingredients:
[0073] Mix 60ml of methanol and 40ml of ultrapure water evenly, and then disperse 0.8392g of lithium hydroxide monohydrate and 7.45ml of titanium isopropoxide into the above mixed solvent. Then join in the high-temperature and high-pressure reactor (volume is 250 milliliters) that has temperature measurement, pressure measurement device, seal.
[0074] 2. Use high temperature and high pressure mixed solvent thermal system to implement constant temperature reaction:
[0075] Put the sealed reaction kettle into a muffle furnace, heat it to 380°C (the pressure inside the vessel reaches 29.5MPa), and keep the temperature constant for 2 hours.
[0076] 3. Cooling:
[0077] The reactor was cooled to room temperature (20-25° C.) with ice water, and the reactor was taken out from the muffle furnace.
[0078] 4. Washing:
[0079] The product was taken out from the reaction kettle, and the product was filtered through a vacuum filter (0.22 nanometers in aper...
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