Method for preventing nano-grain from agglomeration and growth under high-temperature environment
A technology of nano-materials and high-temperature environment, which is applied in the direction of surface coating liquid devices, coatings, special surfaces, etc., can solve the problem that the aggregation and growth of nano-powders cannot be completely inhibited, the process is complex, and nano-powders have no universal significance and other problems, to achieve the effects of easy industrial implementation, simple process, and improved dispersion and thermal stability
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Embodiment 1
[0015] Anatase TiO with a particle size of 20nm is added to the container 2 Powder 2g, 2.40g NaH 2 PO 4 , 100mL of distilled water, stir well, soak for 24h, filter, wash with distilled water several times, and dry at 40°C for 24h. After the obtained powder is calcined at a high temperature of 800° C. for 6 hours, the particles still maintain a particle size of 20 nm, without sintering, agglomeration and growth.
Embodiment 2
[0017] Add 3g of ZnO powder with a particle size of 8nm, 2.94g of H 3 PO 4 , distilled water 100mL, ultrasonically dispersed for 20min, then soaked for 12h, filtered, washed several times with distilled water, and dried at 60°C for 18h. After the obtained powder is calcined at a high temperature of 600° C. for 2 hours, the particles still maintain the original particle size of 8 nm, without sintering, agglomeration and growth.
Embodiment 3
[0019] Add Fe with a particle size of 40nm to the container 2 o 3 Powder 3g, 5.44g KH 2 PO 4 , distilled water 100mL, ultrasonically dispersed for 20min, then soaked for 24h, filtered, washed several times with distilled water, and dried at 80°C for 12h. After the obtained powder is calcined at a high temperature of 400° C. for 2 hours, the particles still maintain the original particle size of 40 nm, without agglomeration and growth.
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