Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of silicon nitride powder
The invention relates to a preparation method of silicon nitride powder, which comprises the following steps: mixing and grinding silicon dioxide powder, a carbon source powder material, initial silicon nitride powder and a solvent, and then drying to obtain precursor powder; wherein the content of alpha-phase silicon nitride in the initial silicon nitride powder is controlled; and nitriding the precursor powder, and then carrying out decarburization to obtain the target silicon nitride powder. In the preparation process of the precursor, silicon nitride fine powder with preset alpha-phase silicon nitride content is added as an inducer, so that the temperature of the nitridation reaction is reduced, the excessive development of crystal grains in the nitridation process is inhibited, and finally, the alpha-phase content of 95% or above is obtained.
本申请涉及一种氮化硅粉体的制备方法，所述方法包括：将二氧化硅粉体、碳源粉体材料、初始氮化硅粉体以及溶剂进行混合磨制，后进行干燥，得到前驱体粉体；其中，控制所述初始氮化硅粉体的α相氮化硅的含量；将所述前驱体粉体进行氮化，后进行脱碳，得到目标氮化硅粉体。在制备前驱体的过程中添加具有预设α相氮化硅含量的氮化硅细粉作为诱导剂，降低氮化反应的温度，抑制氮化过程中晶粒的过度发育，最终得到α相含量在95％以上。
Preparation method of silicon nitride powder
The invention relates to a preparation method of silicon nitride powder, which comprises the following steps: mixing and grinding silicon dioxide powder, a carbon source powder material, initial silicon nitride powder and a solvent, and then drying to obtain precursor powder; wherein the content of alpha-phase silicon nitride in the initial silicon nitride powder is controlled; and nitriding the precursor powder, and then carrying out decarburization to obtain the target silicon nitride powder. In the preparation process of the precursor, silicon nitride fine powder with preset alpha-phase silicon nitride content is added as an inducer, so that the temperature of the nitridation reaction is reduced, the excessive development of crystal grains in the nitridation process is inhibited, and finally, the alpha-phase content of 95% or above is obtained.
本申请涉及一种氮化硅粉体的制备方法，所述方法包括：将二氧化硅粉体、碳源粉体材料、初始氮化硅粉体以及溶剂进行混合磨制，后进行干燥，得到前驱体粉体；其中，控制所述初始氮化硅粉体的α相氮化硅的含量；将所述前驱体粉体进行氮化，后进行脱碳，得到目标氮化硅粉体。在制备前驱体的过程中添加具有预设α相氮化硅含量的氮化硅细粉作为诱导剂，降低氮化反应的温度，抑制氮化过程中晶粒的过度发育，最终得到α相含量在95％以上。
Preparation method of silicon nitride powder
一种氮化硅粉体的制备方法
WU CHUNZHENG (Autor:in) / WANG LIJIA (Autor:in) / LIU JIE (Autor:in) / SHI XIANGYU (Autor:in) / FAN HAOTIAN (Autor:in)
15.12.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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