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Method for preparing silicon nitride nanowires on large scale
The invention discloses a method for preparing silicon nitride nanowires on a large scale, and belongs to the field of ceramic material preparation. The method comprises the following steps: repeatedly folding carbon paper into a wave shape according to a certain length, mixing silicon powder and silicon dioxide powder, and uniformly scattering the mixture into a crack of the folded wave-shaped carbon paper; placing the obtained carbon paper in a graphite furnace, filling nitrogen to 0.1 Mpa, and heating to 1300-1700 DEG C; after the reaction temperature is reached, nitrogen in the sintering furnace is pumped out through a mechanical pump so that the air pressure in the furnace can be reduced, the low-air-pressure state can be kept for 1-20 min, then nitrogen is inflated so that the pressure in the furnace can be increased, and the pressure can be kept for 1-20 min; and repeating the air exhaust and air inflation processes until the total heat preservation time reaches 0.5-10 hours, and finally generating a large batch of silicon nitride nanowires on the surface of the carbon paper. The silicon nitride nanowire prepared by the method is simple in process, low in raw material cost, high in yield and very suitable for direct industrial production.
本发明公开了一种大批量制备氮化硅纳米线的方法，属于陶瓷材料制备领域。所述方法包括以下步骤：将碳纸按一定长度反复翻折成波浪状，将硅粉和二氧化硅粉末混合，均匀地撒在折叠好的波浪状碳纸夹缝中。将得到碳纸置于石墨炉内，充入氮气至0.1Mpa，并且升温至1300～1700℃；达到反应温度后，用机械泵抽出烧结炉内的氮气使炉内气压下降，保持低气压状态1～20min，然后充入氮气使炉内压力升高，维持1～20min；重复上述抽气、充气过程，直至总的保温时间达到0.5～10h后结束，最终在碳纸表面生成了大批量的氮化硅纳米线。利用本发明制备的氮化硅纳米线工艺简单、原料成本低、产量大，非常适合进行直接工业化生产。
Method for preparing silicon nitride nanowires on large scale
The invention discloses a method for preparing silicon nitride nanowires on a large scale, and belongs to the field of ceramic material preparation. The method comprises the following steps: repeatedly folding carbon paper into a wave shape according to a certain length, mixing silicon powder and silicon dioxide powder, and uniformly scattering the mixture into a crack of the folded wave-shaped carbon paper; placing the obtained carbon paper in a graphite furnace, filling nitrogen to 0.1 Mpa, and heating to 1300-1700 DEG C; after the reaction temperature is reached, nitrogen in the sintering furnace is pumped out through a mechanical pump so that the air pressure in the furnace can be reduced, the low-air-pressure state can be kept for 1-20 min, then nitrogen is inflated so that the pressure in the furnace can be increased, and the pressure can be kept for 1-20 min; and repeating the air exhaust and air inflation processes until the total heat preservation time reaches 0.5-10 hours, and finally generating a large batch of silicon nitride nanowires on the surface of the carbon paper. The silicon nitride nanowire prepared by the method is simple in process, low in raw material cost, high in yield and very suitable for direct industrial production.
本发明公开了一种大批量制备氮化硅纳米线的方法，属于陶瓷材料制备领域。所述方法包括以下步骤：将碳纸按一定长度反复翻折成波浪状，将硅粉和二氧化硅粉末混合，均匀地撒在折叠好的波浪状碳纸夹缝中。将得到碳纸置于石墨炉内，充入氮气至0.1Mpa，并且升温至1300～1700℃；达到反应温度后，用机械泵抽出烧结炉内的氮气使炉内气压下降，保持低气压状态1～20min，然后充入氮气使炉内压力升高，维持1～20min；重复上述抽气、充气过程，直至总的保温时间达到0.5～10h后结束，最终在碳纸表面生成了大批量的氮化硅纳米线。利用本发明制备的氮化硅纳米线工艺简单、原料成本低、产量大，非常适合进行直接工业化生产。
Method for preparing silicon nitride nanowires on large scale
一种大批量制备氮化硅纳米线的方法
WANG QI (author) / WANG BAOKAI (author) / ZHU LIFENG (author) / LI MENGYI (author) / YU CHANG (author) / NIU MENGYANG (author)
2024-05-28
Patent
Electronic Resource
Chinese
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