Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Gas-phase synthesis method of boron nitride ceramic precursor
The invention discloses a gas-phase synthesis method of a boron nitride precursor, which comprises the following steps: (1) fully mixing dried diborane and ammonia gas, introducing the mixture into a closed reaction chamber filled with an organic solvent, heating under specific air pressure, and then stirring to react for several hours; and (2) after the reaction is finished, cooling the liquid mixture obtained in the step (1), connecting with a condensation trap, heating to 45-60 DEG C, and distilling, collecting a crude product of the boron nitride precursor in a cold trap cooled by liquid nitrogen; (3) purifying the boron nitride precursor crude product obtained in the step (2) through a low-temperature cold trap in sequence; and collecting the liquid in the cold trap at -80 DEG C to obtain the required pure boron nitride precursor. The boron nitride ceramic precursor prepared by the invention is in a liquid state, and has excellent infiltration dynamic characteristics and good wave permeability; the preparation method disclosed by the invention is simple and easy to implement, low in equipment requirement and high in controllable degree, and has relatively good application and popularization values.
本发明公开了一种氮化硼先驱体的气相合成方法，包括以下步骤：（1）将干燥后乙硼烷和氨气充分混合通入装有机溶剂密闭反应室中，在特定的气压下，进行升温，之后搅拌反应数小时；（2）反应结束后，将步骤（1）中所得到的液态混合物冷却后与冷凝捕集器连接，再加热至45℃～60℃进行蒸馏。得到氮化硼先驱体粗产品，并将其收集于被液氮冷却的冷阱中；（3）将步骤（2）中所得到的氮化硼先驱体粗产品依次通过低温冷阱进行提纯；收集‑80℃冷阱中的液体，即为所需的纯氮化硼先驱体。本发明所制备的氮化硼陶瓷先驱体为液态，具有优异的浸渗动力学特征和良好的透波性;本发明制备方法简单易行、对设备要求低，可控程度高，具有较好的应用推广价值。
Gas-phase synthesis method of boron nitride ceramic precursor
The invention discloses a gas-phase synthesis method of a boron nitride precursor, which comprises the following steps: (1) fully mixing dried diborane and ammonia gas, introducing the mixture into a closed reaction chamber filled with an organic solvent, heating under specific air pressure, and then stirring to react for several hours; and (2) after the reaction is finished, cooling the liquid mixture obtained in the step (1), connecting with a condensation trap, heating to 45-60 DEG C, and distilling, collecting a crude product of the boron nitride precursor in a cold trap cooled by liquid nitrogen; (3) purifying the boron nitride precursor crude product obtained in the step (2) through a low-temperature cold trap in sequence; and collecting the liquid in the cold trap at -80 DEG C to obtain the required pure boron nitride precursor. The boron nitride ceramic precursor prepared by the invention is in a liquid state, and has excellent infiltration dynamic characteristics and good wave permeability; the preparation method disclosed by the invention is simple and easy to implement, low in equipment requirement and high in controllable degree, and has relatively good application and popularization values.
本发明公开了一种氮化硼先驱体的气相合成方法，包括以下步骤：（1）将干燥后乙硼烷和氨气充分混合通入装有机溶剂密闭反应室中，在特定的气压下，进行升温，之后搅拌反应数小时；（2）反应结束后，将步骤（1）中所得到的液态混合物冷却后与冷凝捕集器连接，再加热至45℃～60℃进行蒸馏。得到氮化硼先驱体粗产品，并将其收集于被液氮冷却的冷阱中；（3）将步骤（2）中所得到的氮化硼先驱体粗产品依次通过低温冷阱进行提纯；收集‑80℃冷阱中的液体，即为所需的纯氮化硼先驱体。本发明所制备的氮化硼陶瓷先驱体为液态，具有优异的浸渗动力学特征和良好的透波性;本发明制备方法简单易行、对设备要求低，可控程度高，具有较好的应用推广价值。
Gas-phase synthesis method of boron nitride ceramic precursor
一种氮化硼陶瓷先驱体的气相合成方法
HU WEI (Autor:in) / HU HAIMING (Autor:in) / ZHOU CHANGTIAN (Autor:in) / LIU DI (Autor:in) / TANG HAO (Autor:in) / ZHANG XINNIAN (Autor:in) / DU ZHIMING (Autor:in) / HUANG LAMING (Autor:in)
01.06.2021
Patent
Elektronische Ressource
Chinesisch
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