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Ultrafine aluminum nitride powder preparation process based on high and low temperature carbon thermal reduction method
The invention discloses a superfine aluminum nitride powder preparation process based on a high and low temperature carbon thermal reduction method. Nanometer Al2O3 and carbon black are adopted as raw materials, a nonionic surfactant containing carbon, hydrogen and oxygen elements and serving as a dispersing agent is added, the mixture is mixed and stirred to form thick slurry, then ball milling is conducted for a certain time to enable the slurry to be evenly mixed, then the mixed slurry is put into a drying box to be dried, and then the product is obtained. And carrying out high-low temperature composite carbon thermal reduction synthesis reaction to prepare the superfine aluminum nitride powder. A high-low temperature composite carbon thermal reduction synthesis process is adopted, firstly, an aluminum nitride layer is formed on the surfaces of aluminum oxide particles at the high temperature of 1580-1630 DEG C in a short time, sintering and agglomeration of the aluminum oxide particles are hindered through the aluminum nitride layer, then the temperature is reduced to the low temperature of 1450-1550 DEG C, nitridation is conducted for a long time, and the aluminum oxide particles are obtained. And finally, carrying out in-situ nitridation on the nano aluminum oxide to generate the superfine aluminum nitride.
本发明公开一种基于高低温碳热还原法的超细氮化铝粉体制备工艺。采用纳米Al2O3和碳黑为原料，加入作为分散剂的含有碳氢氧元素的非离子型表面活性剂，混合搅拌形成粘稠的浆料，然后通过球磨一定时间，使浆料混合均匀，之后将混合后的浆料放入干燥箱中烘干，再通过高低温复合碳热还原合成反应制备得到超细氮化铝粉体。本发明采用高低温复合碳热还原合成工艺，首先在1580～1630℃的高温及较短时间下于氧化铝颗粒表面形成氮化铝层，利用该氮化铝层阻碍氧化铝颗粒的烧结与团聚，然后降低至1450～1550℃的较低温下经长时间氮化，最终使纳米氧化铝原位氮化生成超细氮化铝。
Ultrafine aluminum nitride powder preparation process based on high and low temperature carbon thermal reduction method
The invention discloses a superfine aluminum nitride powder preparation process based on a high and low temperature carbon thermal reduction method. Nanometer Al2O3 and carbon black are adopted as raw materials, a nonionic surfactant containing carbon, hydrogen and oxygen elements and serving as a dispersing agent is added, the mixture is mixed and stirred to form thick slurry, then ball milling is conducted for a certain time to enable the slurry to be evenly mixed, then the mixed slurry is put into a drying box to be dried, and then the product is obtained. And carrying out high-low temperature composite carbon thermal reduction synthesis reaction to prepare the superfine aluminum nitride powder. A high-low temperature composite carbon thermal reduction synthesis process is adopted, firstly, an aluminum nitride layer is formed on the surfaces of aluminum oxide particles at the high temperature of 1580-1630 DEG C in a short time, sintering and agglomeration of the aluminum oxide particles are hindered through the aluminum nitride layer, then the temperature is reduced to the low temperature of 1450-1550 DEG C, nitridation is conducted for a long time, and the aluminum oxide particles are obtained. And finally, carrying out in-situ nitridation on the nano aluminum oxide to generate the superfine aluminum nitride.
本发明公开一种基于高低温碳热还原法的超细氮化铝粉体制备工艺。采用纳米Al2O3和碳黑为原料，加入作为分散剂的含有碳氢氧元素的非离子型表面活性剂，混合搅拌形成粘稠的浆料，然后通过球磨一定时间，使浆料混合均匀，之后将混合后的浆料放入干燥箱中烘干，再通过高低温复合碳热还原合成反应制备得到超细氮化铝粉体。本发明采用高低温复合碳热还原合成工艺，首先在1580～1630℃的高温及较短时间下于氧化铝颗粒表面形成氮化铝层，利用该氮化铝层阻碍氧化铝颗粒的烧结与团聚，然后降低至1450～1550℃的较低温下经长时间氮化，最终使纳米氧化铝原位氮化生成超细氮化铝。
Ultrafine aluminum nitride powder preparation process based on high and low temperature carbon thermal reduction method
一种基于高低温碳热还原法的超细氮化铝粉体制备工艺
QIAO LIANG (author) / QIAN YI (author) / ZHENG JINGWU (author) / CAI WEI (author) / YING YAO (author) / LI JUAN (author) / CHE SHENGLEI (author) / YU LIANG (author) / LI WANGCHANG (author)
2024-11-01
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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