A kind of preparation method of superfine niobium carbide powder
A technology of niobium carbide and powder, applied in the direction of nanotechnology, can solve the problems of high carbonization temperature, low activity, agglomeration, etc., and achieve the effect of low carbonization temperature, low investment and small particle size
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Embodiment 1
[0025] After compressing the slurry-like niobium hydroxide obtained by purchasing and drying at 200°C in an oven, 38 kilograms of nano-scale niobium hydroxide were obtained, and then 38 kilograms of niobium hydroxide were mixed with 8.74 kilograms of carbon black, and slowly 3 The temperature was raised to 1300° C. for 1 hour, and the high temperature holding time was 11 hours. When the vacuum degree reached 10 Pa, the carbonization was terminated. Cool with H2 for 14 hours. Ball mill after discharge. The particle size of the Fsss sample was measured to be 0.74 μm, and the chemical composition met the requirements. The specific composition is shown in Table 1.
Embodiment 2
[0027] After compressing the slurry-like niobium hydroxide obtained by purchasing and drying at 220°C in an oven, 48 kilograms of nano-scale niobium hydroxide were obtained, and then 48 kilograms of niobium hydroxide were mixed with 10.94 kilograms of carbon black. The temperature was raised to 1310° C., and the high temperature holding time was 13 hours. When the vacuum reached 12 Pa, the carbonization was completed. Pass H2 to cool, and the cooling time is 15 hours. Ball mill after discharge. The particle size of the Fsss sample was measured to be 0.76 μm, and the chemical composition met the requirements. The specific composition is shown in Table 1.
[0028] Table 1 Composition index of ultrafine NbC
[0029]
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