Production of zinc oxide nanometer ceramic
A technology of zinc oxide and nano-zinc oxide is applied in the field of preparation of nano-zinc oxide ceramics to achieve the effects of uniform distribution of nanoparticles, no secondary pollution and low cost
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Embodiment 1
[0010] Example 1: Put 10 zinc oxide ceramic sheets with a self-made particle size of 2 ± 0.5 microns, a diameter of 10 mm, and a thickness of 1 mm and 20 milliliters of tribromomethane into a stainless steel autoclave with a diameter of 200 mm and a height of 300 mm, and seal the high pressure Put it into a high-temperature furnace and heat it up to 200°C, and the bromoform vapor pressure reaches 2.5MPa, keep the temperature at 200°C and the corresponding bromoform vapor pressure at 2.5MPa for 5 hours, and then cool naturally to room temperature 25±5°C. Open the autoclave and remove the ceramic sample. Finally, the sample is placed in a high-temperature furnace, annealed at 500°C for 4 hours in the atmosphere, and then naturally cooled to room temperature 25±5°C. Scanning electron microscopy and X-ray observations were performed on the final samples. The results showed that all the ZnO ceramic samples were nanosized. The particle size is about 80 nanometers, and the distribu...
Embodiment 2
[0011] Embodiment 2: The zinc oxide ceramic sample, tribromomethane and autoclave used are the same as in Example 1. The autoclave is sealed and heated to 220°C in a high-temperature furnace. The vapor pressure of tribromethane reaches 3.0MPa, and the temperature of 220°C and The corresponding tribromomethane vapor pressure was 3.0MPa for 5 hours, and then naturally cooled to room temperature 25±5°C. Open the autoclave and remove the ceramic sample. Finally, the sample is placed in a high-temperature furnace, annealed at 500°C for 4 hours in the atmosphere, and then naturally cooled to room temperature 25±5°C. Scanning electron microscopy and X-ray observations were performed on the final samples. The results showed that all the ZnO ceramic samples were nanosized. The particle size is about 60 nanometers, and the distribution is uniform.
example 3
[0012] Example 3: The zinc oxide ceramic sample, tribromomethane and autoclave used are the same as in Example 1. The autoclave is sealed and heated to 200°C in a high-temperature furnace. Bromoform vapor pressure 2.5MPa 5 hours, then naturally cooled to room temperature 25 ± 5 ℃. Open the autoclave and remove the ceramic sample. Finally, the sample is put into a high-temperature furnace, annealed at 600°C for 4 hours in the atmosphere, and then naturally cooled to room temperature 25±5°C. Scanning electron microscopy and X-ray observations were performed on the final samples. The results showed that all the ZnO ceramic samples were nanosized. The particle size is about 90 nanometers, and the distribution is uniform.
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