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Preparation method of aluminum nitride ceramic powder
The invention provides a preparation method of aluminum nitride ceramic powder. The preparation method comprises the following steps: S1, reacting an aluminum source with a carbon source in a nitrogen-containing atmosphere to obtain a semi-finished product containing aluminum nitride and excessive carbon source; S2, carrying out primary carbon discharging treatment on the semi-finished product inoxygen-containing gas to obtain a primarily-carbon-discharged powder; and S3, putting the primarily-carbon-discharged powder into a rotary kiln, and performing secondary carbon discharge treatment bytaking carbon dioxide as reaction gas to obtain an aluminum nitride ceramic powder finished product. Before carbon dioxide carbon discharging treatment is adopted, oxygen-containing gas is adopted forcarbon discharging for the first time to remove most of carbon, and then carbon dioxide carbon discharging treatment is adopted, so the carbon dioxide carbon discharging time can be shortened, and the carbon discharging efficiency is improved; and meanwhile, the secondary carbon discharge treatment is carried out in the rotary kiln, so that carbon in all materials of the primarily-carbon-discharged powder can fully react with carbon dioxide, the carbon discharge efficiency is further improved, and industrial production is facilitated.
本发明提供了一种氮化铝陶瓷粉体的制备方法。该制备方法包括：步骤S1，将铝源和碳源在含氮气的气氛中反应，得到含有氮化铝和过量碳源的半成品；步骤S2，将半成品在含氧气体中进行第一次排碳处理，得到初排碳粉体；以及步骤S3，将初排碳粉体置于回转窑中、以二氧化碳为反应气体进行第二次排碳处理，得到氮化铝陶瓷粉体成品。在采用二氧化碳排碳处理之前，先采用含氧气体进行第一次排碳，从而去除绝大部分的碳，然后再采用二氧化碳排碳处理，进而可以缩短二氧化碳排碳的时间，提高排碳效率；同时第二次排碳处理在回转窑中进行，使得初排碳粉体的所有物料中的碳均可以和二氧化碳充分反应，进一步提高了排碳效率，更有利于工业化生产。
Preparation method of aluminum nitride ceramic powder
The invention provides a preparation method of aluminum nitride ceramic powder. The preparation method comprises the following steps: S1, reacting an aluminum source with a carbon source in a nitrogen-containing atmosphere to obtain a semi-finished product containing aluminum nitride and excessive carbon source; S2, carrying out primary carbon discharging treatment on the semi-finished product inoxygen-containing gas to obtain a primarily-carbon-discharged powder; and S3, putting the primarily-carbon-discharged powder into a rotary kiln, and performing secondary carbon discharge treatment bytaking carbon dioxide as reaction gas to obtain an aluminum nitride ceramic powder finished product. Before carbon dioxide carbon discharging treatment is adopted, oxygen-containing gas is adopted forcarbon discharging for the first time to remove most of carbon, and then carbon dioxide carbon discharging treatment is adopted, so the carbon dioxide carbon discharging time can be shortened, and the carbon discharging efficiency is improved; and meanwhile, the secondary carbon discharge treatment is carried out in the rotary kiln, so that carbon in all materials of the primarily-carbon-discharged powder can fully react with carbon dioxide, the carbon discharge efficiency is further improved, and industrial production is facilitated.
本发明提供了一种氮化铝陶瓷粉体的制备方法。该制备方法包括：步骤S1，将铝源和碳源在含氮气的气氛中反应，得到含有氮化铝和过量碳源的半成品；步骤S2，将半成品在含氧气体中进行第一次排碳处理，得到初排碳粉体；以及步骤S3，将初排碳粉体置于回转窑中、以二氧化碳为反应气体进行第二次排碳处理，得到氮化铝陶瓷粉体成品。在采用二氧化碳排碳处理之前，先采用含氧气体进行第一次排碳，从而去除绝大部分的碳，然后再采用二氧化碳排碳处理，进而可以缩短二氧化碳排碳的时间，提高排碳效率；同时第二次排碳处理在回转窑中进行，使得初排碳粉体的所有物料中的碳均可以和二氧化碳充分反应，进一步提高了排碳效率，更有利于工业化生产。
Preparation method of aluminum nitride ceramic powder
氮化铝陶瓷粉体的制备方法
SONG XIBIN (author) / WANG HAICHAO (author) / LI XINYONG (author) / PAN GUANGJUN (author)
2020-08-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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