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Rotary kiln for preparing silicon nitride powder and preparation process of silicon nitride powder
The invention belongs to the technical field of silicon nitride powder preparation, and particularly relates to a rotary kiln for preparing silicon nitride powder and a preparation process of the silicon nitride powder.The rotary kiln comprises an outer shell, a heating device, a flat plate kiln car, an upper toothed plate and a gear crucible. Silicon nitride is synthesized from silicon powder and nitrogen without generating high-temperature beta-phase side reaction, and high-alpha-phase silicon nitride powder is synthesized. By using the continuous kiln, continuous charging and discharging can be realized, the overall sintering time is shortened from 80-120h to 10-20h, hundreds of kilograms of silicon nitride powder can be produced in a single cycle period, the temperature of the powder is constant by pushing the kiln through the kiln car, and the heating and heat preservation time is controlled through the advancing speed of the kiln car, so that more energy is saved, and the efficiency is improved.
本发明属于氮化硅粉末制备技术领域，具体涉及一种制备氮化硅粉的旋转窑炉及氮化硅粉的制备工艺，包括外部壳体、加热装置、平板窑车、上部齿板及齿轮坩埚，本发明主要特点是利用旋转窑炉结合温度、气氛、转速等的合理控制，使硅粉与氮气合成氮化硅而不产生高温β相副反应，合成高α相氮化硅粉体。使用连续窑炉可连续装料出料，整体烧结时间由80‑120h缩短到10‑20h，单次循环周期内可生产上百公斤氮化硅粉体，粉体由窑车推动窑炉恒定温度，通过窑车的前进速度控制升温保温时间更节能且提升效率。
Rotary kiln for preparing silicon nitride powder and preparation process of silicon nitride powder
The invention belongs to the technical field of silicon nitride powder preparation, and particularly relates to a rotary kiln for preparing silicon nitride powder and a preparation process of the silicon nitride powder.The rotary kiln comprises an outer shell, a heating device, a flat plate kiln car, an upper toothed plate and a gear crucible. Silicon nitride is synthesized from silicon powder and nitrogen without generating high-temperature beta-phase side reaction, and high-alpha-phase silicon nitride powder is synthesized. By using the continuous kiln, continuous charging and discharging can be realized, the overall sintering time is shortened from 80-120h to 10-20h, hundreds of kilograms of silicon nitride powder can be produced in a single cycle period, the temperature of the powder is constant by pushing the kiln through the kiln car, and the heating and heat preservation time is controlled through the advancing speed of the kiln car, so that more energy is saved, and the efficiency is improved.
本发明属于氮化硅粉末制备技术领域，具体涉及一种制备氮化硅粉的旋转窑炉及氮化硅粉的制备工艺，包括外部壳体、加热装置、平板窑车、上部齿板及齿轮坩埚，本发明主要特点是利用旋转窑炉结合温度、气氛、转速等的合理控制，使硅粉与氮气合成氮化硅而不产生高温β相副反应，合成高α相氮化硅粉体。使用连续窑炉可连续装料出料，整体烧结时间由80‑120h缩短到10‑20h，单次循环周期内可生产上百公斤氮化硅粉体，粉体由窑车推动窑炉恒定温度，通过窑车的前进速度控制升温保温时间更节能且提升效率。
Rotary kiln for preparing silicon nitride powder and preparation process of silicon nitride powder
一种制备氮化硅粉的旋转窑炉及氮化硅粉的制备工艺
ZHOU LIANG (author) / XU ZHUANGZHI (author) / ZHANG MING (author)
2023-11-24
Patent
Electronic Resource
Chinese
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