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Method for preparing aluminum nitride powder by using soluble carbon source
The invention relates to a method for preparing aluminum nitride powder by using a soluble carbon source. The method comprises the following steps: preparing an aqueous solution of a precipitant and an aqueous solution of aluminum salt, and adding a first dispersing agent and the aqueous solution of the aluminum salt into the aqueous solution of the precipitant to obtain a precipitate; filtering and washing the precipitate, and then adding water, an organic water-soluble carbon source and a second dispersing agent to prepare slurry; drying the slurry to obtain reaction precursor powder; and sequentially carrying out reaction calcination and decarburization calcination to obtain the aluminum nitride powder. According to the method, the carbon source is dissolved in the water-based slurry ina molecular form, and the carbon source is rapidly and uniformly separated out on the surface of the aluminum source through a spray drying method, so aluminum salt and the carbon source are in fullcontact, the particle size of precipitated particles is small, and the reaction activity of the whole reaction system is improved. The method is universal in equipment, simple in process, high in controllability and suitable for industrial large-scale production, and the prepared aluminum nitride powder is high in purity, small in particle size and uniform in dispersion and has actual developmentand application value in the field of ceramic heat dissipation.
本发明涉及一种利用可溶性碳源来制备氮化铝粉体的方法，包括：配制沉淀剂水溶液和铝盐水溶液，在沉淀剂水溶液中加入第一分散剂和铝盐水溶液，得到沉淀；过滤并洗涤沉淀，然后加入水、有机水溶性碳源和第二分散剂，制得浆料；干燥制得反应前驱物粉料；依次进行反应煅烧和进行除碳煅烧，得到氮化铝粉体。本发明方法中碳源以分子形式溶解在水性浆料中，通过喷雾干燥的方法快速使碳源在铝源表面均匀析出，实现铝盐和碳源充分接触，且沉淀颗粒粒径小，提高了整个反应体系的反应活性。本发明方法设备通用、流程简单、可控性强，适宜工业化大规模生产，且所制得的氮化铝粉体纯度高、粒径小且分散均匀，在陶瓷散热领域有实际的开发和应用价值。
Method for preparing aluminum nitride powder by using soluble carbon source
The invention relates to a method for preparing aluminum nitride powder by using a soluble carbon source. The method comprises the following steps: preparing an aqueous solution of a precipitant and an aqueous solution of aluminum salt, and adding a first dispersing agent and the aqueous solution of the aluminum salt into the aqueous solution of the precipitant to obtain a precipitate; filtering and washing the precipitate, and then adding water, an organic water-soluble carbon source and a second dispersing agent to prepare slurry; drying the slurry to obtain reaction precursor powder; and sequentially carrying out reaction calcination and decarburization calcination to obtain the aluminum nitride powder. According to the method, the carbon source is dissolved in the water-based slurry ina molecular form, and the carbon source is rapidly and uniformly separated out on the surface of the aluminum source through a spray drying method, so aluminum salt and the carbon source are in fullcontact, the particle size of precipitated particles is small, and the reaction activity of the whole reaction system is improved. The method is universal in equipment, simple in process, high in controllability and suitable for industrial large-scale production, and the prepared aluminum nitride powder is high in purity, small in particle size and uniform in dispersion and has actual developmentand application value in the field of ceramic heat dissipation.
本发明涉及一种利用可溶性碳源来制备氮化铝粉体的方法，包括：配制沉淀剂水溶液和铝盐水溶液，在沉淀剂水溶液中加入第一分散剂和铝盐水溶液，得到沉淀；过滤并洗涤沉淀，然后加入水、有机水溶性碳源和第二分散剂，制得浆料；干燥制得反应前驱物粉料；依次进行反应煅烧和进行除碳煅烧，得到氮化铝粉体。本发明方法中碳源以分子形式溶解在水性浆料中，通过喷雾干燥的方法快速使碳源在铝源表面均匀析出，实现铝盐和碳源充分接触，且沉淀颗粒粒径小，提高了整个反应体系的反应活性。本发明方法设备通用、流程简单、可控性强，适宜工业化大规模生产，且所制得的氮化铝粉体纯度高、粒径小且分散均匀，在陶瓷散热领域有实际的开发和应用价值。
Method for preparing aluminum nitride powder by using soluble carbon source
一种利用可溶性碳源来制备氮化铝粉体的方法
WANG HUADONG (author) / HAN YAO (author) / DONG HENG (author) / LYU YI (author) / ZHANG JIAN (author) / ZHANG TIANXIANG (author) / ZHANG HAO (author)
2020-12-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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