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Boron carbide ceramic pressureless sintering preparation process
The invention relates to the technical field of ceramic composite materials, and provides a boron carbide ceramic pressureless sintering preparation process which comprises the following steps of: S1, boron carbide submicron powder preparation: grinding a boron carbide raw material into boron carbide submicron powder with the particle size of 0.5-1.0 mu m in a sand mill; S2, slurry preparation: sequentially adding a water solvent, the boron carbide submicron powder and a dispersing agent into a high-speed dispersion machine and dispersing for 1-2 hours, pumping the slurry into a stirring ball mill, sequentially adding a sintering aid, an adhesive, a plasticizer, a dispersing agent and a defoaming agent into the stirring ball mill, and mutually circulating the stirring ball mill and a low-speed dispersion machine for 3-8 hours to obtain slurry; S3, granulation powder preparation: spray-drying the slurry to obtain granulation powder; S4, compression molding: pressing the granulation powder into a green body with the relative density greater than or equal to 60% by adjusting the pressure and isostatic pressure of a hydraulic machine, the relative density being equal to green body density/product density; and S5, pressureless sintering: carrying out pressureless sintering in a sintering furnace to obtain boron carbide ceramic, including a vacuum degumming stage, a vacuum high-temperature stage, a high-temperature sintering stage and a cooling stage.
本发明陶瓷复合材料技术领域，提供了一种碳化硼陶瓷无压烧结制备工艺，包括以下步骤：S1、碳化硼亚微米粉体制备：将碳化硼原料在砂磨机中研磨成粒径0.5‑1.0um的碳化硼亚微米粉体；S2、浆料制备：将水溶剂、碳化硼亚微米粉体、分散剂依次加入高速分散机分散1‑2h；将浆料泵入搅拌球磨机，搅拌球磨机依次加入烧结助剂、黏结剂、塑化剂、分散剂、去泡剂，搅拌球磨机与低速分散机互循环3‑8h得到浆料；S3、造粒粉制备：将上述浆料进行喷雾干燥，得到造粒粉；S4、压制成型：通过调节液压机压力和等静压力，将造粒粉压制成相对密度≧60％的生坯；所述相对密度＝生坯密度/产品密度；S5、无压烧结，无压烧结在烧结炉中进行，分为真空脱胶阶段、真空高温阶段、高温烧结阶段、冷却阶段，得到碳化硼陶瓷。
Boron carbide ceramic pressureless sintering preparation process
The invention relates to the technical field of ceramic composite materials, and provides a boron carbide ceramic pressureless sintering preparation process which comprises the following steps of: S1, boron carbide submicron powder preparation: grinding a boron carbide raw material into boron carbide submicron powder with the particle size of 0.5-1.0 mu m in a sand mill; S2, slurry preparation: sequentially adding a water solvent, the boron carbide submicron powder and a dispersing agent into a high-speed dispersion machine and dispersing for 1-2 hours, pumping the slurry into a stirring ball mill, sequentially adding a sintering aid, an adhesive, a plasticizer, a dispersing agent and a defoaming agent into the stirring ball mill, and mutually circulating the stirring ball mill and a low-speed dispersion machine for 3-8 hours to obtain slurry; S3, granulation powder preparation: spray-drying the slurry to obtain granulation powder; S4, compression molding: pressing the granulation powder into a green body with the relative density greater than or equal to 60% by adjusting the pressure and isostatic pressure of a hydraulic machine, the relative density being equal to green body density/product density; and S5, pressureless sintering: carrying out pressureless sintering in a sintering furnace to obtain boron carbide ceramic, including a vacuum degumming stage, a vacuum high-temperature stage, a high-temperature sintering stage and a cooling stage.
本发明陶瓷复合材料技术领域，提供了一种碳化硼陶瓷无压烧结制备工艺，包括以下步骤：S1、碳化硼亚微米粉体制备：将碳化硼原料在砂磨机中研磨成粒径0.5‑1.0um的碳化硼亚微米粉体；S2、浆料制备：将水溶剂、碳化硼亚微米粉体、分散剂依次加入高速分散机分散1‑2h；将浆料泵入搅拌球磨机，搅拌球磨机依次加入烧结助剂、黏结剂、塑化剂、分散剂、去泡剂，搅拌球磨机与低速分散机互循环3‑8h得到浆料；S3、造粒粉制备：将上述浆料进行喷雾干燥，得到造粒粉；S4、压制成型：通过调节液压机压力和等静压力，将造粒粉压制成相对密度≧60％的生坯；所述相对密度＝生坯密度/产品密度；S5、无压烧结，无压烧结在烧结炉中进行，分为真空脱胶阶段、真空高温阶段、高温烧结阶段、冷却阶段，得到碳化硼陶瓷。
Boron carbide ceramic pressureless sintering preparation process
一种碳化硼陶瓷无压烧结制备工艺
YIN BANGJIN (Autor:in) / CHEN CHONG (Autor:in) / YIN ZHIYONG (Autor:in)
08.10.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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