A kind of push boat type semi-continuous method boron nitride nanotube preparation furnace and using method thereof
A technology of boron nitride nanotubes and furnace tails, which is applied in chemical instruments and methods, nitrogen compounds, inorganic chemistry, etc., can solve the problem that the synthesis of BNNTs is not too large, the effective utilization rate of reducing gas is not high, and the waste gas cannot be effectively treated and other problems, to achieve the effect of continuous large-scale synthesis, rich and diverse product structure, avoiding repeated opening times and idle time
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Embodiment 1
[0030] Utilize the present invention to provide such as figure 1 The method for synthesizing smooth-walled boron nitride nanotubes with the equipment shown is as follows:
[0031] Check in advance to ensure that the equipment is in good working order overall. Start the electric control heating device A, set the temperature to heat the furnace 8, and the heating rate is 4-8°C / min. Close the furnace head door 3 and the furnace tail furnace door 4, open the furnace head exhaust pipe 1 and the furnace tail air intake pipe 2, vacuum and exhaust the furnace chamber 8, and then continue to transport into the furnace chamber 8 through the furnace tail intake pipe 2 Ammonia, the flow of ammonia is controlled at 0.4-1.0L / min, and the pipeline gas circulation machine is kept in the open working state. Immediately after, the ceramic boat covered with ultrafine boron carbide powder is put into the furnace chamber 8 of the furnace body B to carry out a heat preservation reaction, the reac...
Embodiment 2
[0033] Utilize the present invention to provide such as figure 1 The method for synthesizing bamboo-type boron nitride nanotubes by the equipment shown is basically similar to that in Example 1, except that the heating rate is 6-10°C / min, the flow rate of ammonia gas is 0.6-1.2L / min, and the holding temperature is 900°C. -1400℃, holding time 3-6h. XRD, Raman spectrum, TEM analysis were carried out to the bamboo-shaped BNNTs obtained in Example 2, and the results were as follows. Figure 3-5 shown.
[0034] from image 3 It can be seen in the characteristic XRD diffraction spectrum of the BNNTs sample that the characteristic diffraction peaks are very clear, indicating that the sample has a good degree of crystallinity. The d values of the characteristic diffraction peaks are at 0.33492, 0.21843, 0.20786 and 0.16693 nm, corresponding to the (002), (100), (101) and (004) crystal planes of hexagonal boron nitride, respectively. From this, the unit cell constants of the prod...
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