Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ceramic powder preparation method based on freeze casting molding
The invention discloses a ceramic powder preparation method based on freezing casting molding. The method comprises the following steps: (1) mixing a powder raw material, a solvent and an additive toobtain slurry with the solid phase content of 30-70wt%; (2) converting the slurry into a raw material blank with an internal through hole structure by adopting freezing casting molding and vacuum freeze drying processes and utilizing a temperature gradient formed by a mold; (3) putting the raw material blank into a reaction device with airflow control and anti-pollution functions in a high-temperature graphite sintering furnace, and carrying out high-temperature synthesis in a controlled reaction environment; and (4) carrying out ball milling and carbon removal process treatment on the raw material blank synthesized at high temperature to obtain the high-purity ceramic powder. The method can be used for macroscopic preparation of ceramic powder such as nitride and nitric oxide based on high-temperature gas-solid synthesis reaction, and has good application prospect and popularization value.
本发明公开了一种基于冷冻浇注成型的陶瓷粉体制备方法，包括如下步骤：(1)将粉体原料、溶剂、添加剂混合，得到固相含量为30～70wt％的浆料；(2)采用冷冻浇注成型和真空冷冻干燥工艺，并利用模具形成的温度梯度将料浆转变为具有内部通孔结构的原料坯体；(3)将原料坯体置于高温石墨烧结炉内具有气流控制和防污染功能的反应装置中，在受控的反应环境下进行高温合成；(4)将高温合成的原料坯体经球磨和除碳工艺处理后，获得高纯度的陶瓷粉体。本发明可用于基于高温气‑固合成反应的氮化物、氮氧化物等陶瓷粉体的宏量制备，具有良好的应用前景和推广价值。
Ceramic powder preparation method based on freeze casting molding
The invention discloses a ceramic powder preparation method based on freezing casting molding. The method comprises the following steps: (1) mixing a powder raw material, a solvent and an additive toobtain slurry with the solid phase content of 30-70wt%; (2) converting the slurry into a raw material blank with an internal through hole structure by adopting freezing casting molding and vacuum freeze drying processes and utilizing a temperature gradient formed by a mold; (3) putting the raw material blank into a reaction device with airflow control and anti-pollution functions in a high-temperature graphite sintering furnace, and carrying out high-temperature synthesis in a controlled reaction environment; and (4) carrying out ball milling and carbon removal process treatment on the raw material blank synthesized at high temperature to obtain the high-purity ceramic powder. The method can be used for macroscopic preparation of ceramic powder such as nitride and nitric oxide based on high-temperature gas-solid synthesis reaction, and has good application prospect and popularization value.
本发明公开了一种基于冷冻浇注成型的陶瓷粉体制备方法，包括如下步骤：(1)将粉体原料、溶剂、添加剂混合，得到固相含量为30～70wt％的浆料；(2)采用冷冻浇注成型和真空冷冻干燥工艺，并利用模具形成的温度梯度将料浆转变为具有内部通孔结构的原料坯体；(3)将原料坯体置于高温石墨烧结炉内具有气流控制和防污染功能的反应装置中，在受控的反应环境下进行高温合成；(4)将高温合成的原料坯体经球磨和除碳工艺处理后，获得高纯度的陶瓷粉体。本发明可用于基于高温气‑固合成反应的氮化物、氮氧化物等陶瓷粉体的宏量制备，具有良好的应用前景和推广价值。
Ceramic powder preparation method based on freeze casting molding
一种基于冷冻浇注成型的陶瓷粉体制备方法
YUE YINGLEI (Autor:in) / XU TINGTING (Autor:in)
23.02.2021
Patent
Elektronische Ressource
Chinesisch
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