Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of large-size silicon nitride ceramic
The invention relates to a preparation method of large-size silicon nitride ceramic, which comprises the following steps: mixing a sintering aid and a dispersing agent for the first time to obtain first mixed powder; mixing the second silicon nitride powder with the first mixed powder to obtain second mixed powder; mixing the third mixed binder solution with the second mixed powder to obtain silicon nitride slurry; carrying out spray granulation by using the silicon nitride slurry to obtain spherical powder; filling the spherical powder into a die, and performing cold isostatic pressing to obtain a silicon nitride green body; and performing degreasing and hot isostatic pressing on the silicon nitride green body to obtain the large-size silicon nitride ceramic. According to the preparation method provided by the invention, preparation of the large-size silicon nitride ceramic can be realized, the process is simple, mass production is easy, and the obtained large-size silicon nitride ceramic is high in density, good in uniformity and excellent in performance.
本发明涉及一种大尺寸氮化硅陶瓷的制备方法，所述制备方法包括如下步骤：第一混合烧结助剂与分散剂，得到第一混粉；第二混合氮化硅粉末与第一混粉，得到第二混粉；第三混合粘结剂溶液与第二混粉，得到氮化硅浆料；使用氮化硅浆料进行喷雾造粒，得到球形粉末；球形粉末装模后进行冷等静压成型，得到氮化硅生坯；氮化硅生坯经脱脂与热等静压，得到所述大尺寸氮化硅陶瓷。本发明提供的制备方法能够实现大尺寸氮化硅陶瓷的制备，且工艺简单，易于大批量生产，且所得大尺寸氮化硅陶瓷的致密度高、均匀性好且性能优异。
Preparation method of large-size silicon nitride ceramic
The invention relates to a preparation method of large-size silicon nitride ceramic, which comprises the following steps: mixing a sintering aid and a dispersing agent for the first time to obtain first mixed powder; mixing the second silicon nitride powder with the first mixed powder to obtain second mixed powder; mixing the third mixed binder solution with the second mixed powder to obtain silicon nitride slurry; carrying out spray granulation by using the silicon nitride slurry to obtain spherical powder; filling the spherical powder into a die, and performing cold isostatic pressing to obtain a silicon nitride green body; and performing degreasing and hot isostatic pressing on the silicon nitride green body to obtain the large-size silicon nitride ceramic. According to the preparation method provided by the invention, preparation of the large-size silicon nitride ceramic can be realized, the process is simple, mass production is easy, and the obtained large-size silicon nitride ceramic is high in density, good in uniformity and excellent in performance.
本发明涉及一种大尺寸氮化硅陶瓷的制备方法，所述制备方法包括如下步骤：第一混合烧结助剂与分散剂，得到第一混粉；第二混合氮化硅粉末与第一混粉，得到第二混粉；第三混合粘结剂溶液与第二混粉，得到氮化硅浆料；使用氮化硅浆料进行喷雾造粒，得到球形粉末；球形粉末装模后进行冷等静压成型，得到氮化硅生坯；氮化硅生坯经脱脂与热等静压，得到所述大尺寸氮化硅陶瓷。本发明提供的制备方法能够实现大尺寸氮化硅陶瓷的制备，且工艺简单，易于大批量生产，且所得大尺寸氮化硅陶瓷的致密度高、均匀性好且性能优异。
Preparation method of large-size silicon nitride ceramic
一种大尺寸氮化硅陶瓷的制备方法
YAO LIJUN (Autor:in) / TENG XIAOPENG (Autor:in) / WU DONGQING (Autor:in) / LIAO PEIJUN (Autor:in)
11.10.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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