Photo-cured silicon carbide ceramic slurry as well as preparation method and application thereof: Fid-Bau Portal

Photo-cured silicon carbide ceramic slurry as well as preparation method and application thereof

YE GAOLIN / ZHOU PENG / JIAO YIFEI / ZHANG RUBING

The invention provides light-cured silicon carbide ceramic slurry and a preparation method and application thereof, and the preparation method comprises the following steps: (1) carrying out modification treatment on silicon carbide powder to obtain modified silicon carbide powder coated with silicon dioxide on the surface; and (2) mixing the modified silicon carbide powder, photosensitive resin and a dispersing agent, and carrying out ball milling treatment to obtain the light-cured silicon carbide ceramic slurry, wherein the mass fraction of the modified silicon carbide powder in the light-cured silicon carbide ceramic slurry is 70-72%. The prepared photocuring silicon carbide ceramic slurry is good in fluidity and high in curing capacity, 3D printing of a high-solid-content silicon carbide ceramic green body is achieved, and a guarantee is provided for the mechanical property of the silicon carbide ceramic green body after degreasing and sintering. The method realizes printing of silicon carbide with a complex structure, and has the advantages of high forming precision, high speed and capability of manufacturing a silicon carbide ceramic component with a complex shape without a mold.

本发明提供了一种光固化碳化硅陶瓷浆料及其制备方法与应用，该制备方法包括：(1)将碳化硅粉体进行改性处理，得到表面包覆有二氧化硅的改性碳化硅粉体；(2)将所述改性碳化硅粉体、光敏树脂和分散剂混合后进行球磨处理，得到所述光固化碳化硅陶瓷浆料；其中，所述改性碳化硅粉体在所述光固化碳化硅陶瓷浆料中的质量分数为70～72％。本发明制备提供的光固化碳化硅陶瓷浆料流动性好，且固化能力强，实现了高固含量的碳化硅陶瓷生坯的3D打印，为碳化硅陶瓷生坯脱脂烧结后的力学性能提供了保证。本发明实现了复杂结构碳化硅的打印，同时具有成型精度高、速度快，无需模具也能制造形状复杂的碳化硅陶瓷构件的优势。

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