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Silicon nitride powder, preparation method thereof and silicon nitride ceramic
The invention provides silicon nitride powder, a preparation method thereof and silicon nitride ceramic. The preparation method of the silicon nitride powder comprises the following steps: mixing liquid silicon halide and a silicon-based auxiliary agent with the particle size of 50-500nm in a protective atmosphere according to the weight ratio of 100: (1-11) to form mixed slurry; introducing the mixed slurry into liquid ammonia in a reactor, and reacting the liquid silicon halide with the liquid ammonia in a temperature range of-50 DEG C to 50 DEG C to obtain precursor powder; standing, filtering, separating and cleaning with a solvent to remove byproducts to obtain a solid mixture; roasting the solid mixture for 0.5-5 hours in a nitrogen-containing atmosphere in a temperature range of 1300-1600 DEG C to obtain silicon nitride powder; the weight ratio of the liquid silicon halide to the liquid ammonia is 1: (3-15), and the silicon-based auxiliary agent is silicon powder or alpha-phase silicon nitride with the alpha-phase content greater than or equal to 93%. The silicon nitride powder disclosed by the invention is uniform in morphology and has a wide application prospect.
本申请提供了一种氮化硅粉体及其制备方法、氮化硅陶瓷。该氮化硅粉体的制备方法包括在保护性气氛中混合重量比为100:1‑11的液态卤化硅与粒径为50nm‑500nm的硅基助剂，形成混合浆料；将混合浆料引入位于反应器内的液氨的内部，液态卤化硅与液氨在‑50℃至50℃的温度范围内反应得到前驱体粉体；静置、过滤、分离以及溶剂清洗去除副产物，得到固体混合物；在1300℃‑1600℃的温度范围内，在含氮气氛中焙烧固体混合物持续0.5‑5h，得到氮化硅粉体；液态卤化硅与液氨的重量比为1:3‑15，硅基助剂为硅粉或α相含量大于或等于93％的α相氮化硅。本申请的氮化硅粉体形貌均一，具有广阔的应用前景。
Silicon nitride powder, preparation method thereof and silicon nitride ceramic
The invention provides silicon nitride powder, a preparation method thereof and silicon nitride ceramic. The preparation method of the silicon nitride powder comprises the following steps: mixing liquid silicon halide and a silicon-based auxiliary agent with the particle size of 50-500nm in a protective atmosphere according to the weight ratio of 100: (1-11) to form mixed slurry; introducing the mixed slurry into liquid ammonia in a reactor, and reacting the liquid silicon halide with the liquid ammonia in a temperature range of-50 DEG C to 50 DEG C to obtain precursor powder; standing, filtering, separating and cleaning with a solvent to remove byproducts to obtain a solid mixture; roasting the solid mixture for 0.5-5 hours in a nitrogen-containing atmosphere in a temperature range of 1300-1600 DEG C to obtain silicon nitride powder; the weight ratio of the liquid silicon halide to the liquid ammonia is 1: (3-15), and the silicon-based auxiliary agent is silicon powder or alpha-phase silicon nitride with the alpha-phase content greater than or equal to 93%. The silicon nitride powder disclosed by the invention is uniform in morphology and has a wide application prospect.
本申请提供了一种氮化硅粉体及其制备方法、氮化硅陶瓷。该氮化硅粉体的制备方法包括在保护性气氛中混合重量比为100:1‑11的液态卤化硅与粒径为50nm‑500nm的硅基助剂，形成混合浆料；将混合浆料引入位于反应器内的液氨的内部，液态卤化硅与液氨在‑50℃至50℃的温度范围内反应得到前驱体粉体；静置、过滤、分离以及溶剂清洗去除副产物，得到固体混合物；在1300℃‑1600℃的温度范围内，在含氮气氛中焙烧固体混合物持续0.5‑5h，得到氮化硅粉体；液态卤化硅与液氨的重量比为1:3‑15，硅基助剂为硅粉或α相含量大于或等于93％的α相氮化硅。本申请的氮化硅粉体形貌均一，具有广阔的应用前景。
Silicon nitride powder, preparation method thereof and silicon nitride ceramic
氮化硅粉体及其制备方法、氮化硅陶瓷
HAN ZHAO (author) / LIU PENGFEI (author) / XI WEI (author) / WU LIUSHUN (author)
2024-08-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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