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Porous silicon carbide ceramic material and preparation method thereof
The invention provides a porous silicon carbide ceramic material and a preparation method thereof. The porous silicon carbide ceramic is of a honeycomb structure, pores of the porous silicon carbide ceramic are disorderly communicated in a three-dimensional grid shape and are uniformly distributed, and the sizes of the pores are 20-30 microns. The preparation method of the porous silicon carbide ceramic material comprises the following steps of: a, adding matrix raw materials including silicon carbide powder, aluminum hydroxide powder and yttrium oxide powder into a container, then adding a dispersing agent and deionized water, carrying out primary ball milling, then adding a binder, and carrying out secondary ball milling to obtain uniform slurry; b, pouring the slurry prepared in the step a into a container for vacuum defoaming, and then injecting the defoamed slurry into a freezing mold for freezing to obtain a frozen green body; c, drying the frozen green body prepared in the stepb under a vacuum condition to obtain a porous SiC green body; d, putting the green body prepared in the step c into a heat preservation box to be dried; and e, sintering the green body obtained in thestep d. The preparation process is simple and efficient, and the operation is easy to control.
本公开提供了一种多孔碳化硅陶瓷材料及其制备方法。所述多孔碳化硅陶瓷为蜂窝状结构，多孔碳化硅陶瓷的孔隙呈立体网格状无序联通，孔隙分布均匀，孔隙的尺寸为20μm～30μm。所述多孔碳化硅陶瓷材料的制备方法包含：a.将基体原料碳化硅粉体、氢氧化铝粉体、氧化钇粉体加入容器中，然后再加入分散剂、去离子水，首次球磨，之后再加入粘结剂，二次球磨，得到均匀的浆料；b.将步骤a所制得的浆料倒入容器中真空除泡，之后将除泡后的浆料注入到冷冻模具中冷冻，得到冷冻生胚；c.将步骤b所制得的冷冻生胚在真空条件下干燥，得到多孔SiC胚体；d.将步骤c所制得的胚体放入保温箱干燥；e.将步骤d所得到的胚体烧结。本公开的制备工艺简单高效，操作易于控制。
Porous silicon carbide ceramic material and preparation method thereof
The invention provides a porous silicon carbide ceramic material and a preparation method thereof. The porous silicon carbide ceramic is of a honeycomb structure, pores of the porous silicon carbide ceramic are disorderly communicated in a three-dimensional grid shape and are uniformly distributed, and the sizes of the pores are 20-30 microns. The preparation method of the porous silicon carbide ceramic material comprises the following steps of: a, adding matrix raw materials including silicon carbide powder, aluminum hydroxide powder and yttrium oxide powder into a container, then adding a dispersing agent and deionized water, carrying out primary ball milling, then adding a binder, and carrying out secondary ball milling to obtain uniform slurry; b, pouring the slurry prepared in the step a into a container for vacuum defoaming, and then injecting the defoamed slurry into a freezing mold for freezing to obtain a frozen green body; c, drying the frozen green body prepared in the stepb under a vacuum condition to obtain a porous SiC green body; d, putting the green body prepared in the step c into a heat preservation box to be dried; and e, sintering the green body obtained in thestep d. The preparation process is simple and efficient, and the operation is easy to control.
本公开提供了一种多孔碳化硅陶瓷材料及其制备方法。所述多孔碳化硅陶瓷为蜂窝状结构，多孔碳化硅陶瓷的孔隙呈立体网格状无序联通，孔隙分布均匀，孔隙的尺寸为20μm～30μm。所述多孔碳化硅陶瓷材料的制备方法包含：a.将基体原料碳化硅粉体、氢氧化铝粉体、氧化钇粉体加入容器中，然后再加入分散剂、去离子水，首次球磨，之后再加入粘结剂，二次球磨，得到均匀的浆料；b.将步骤a所制得的浆料倒入容器中真空除泡，之后将除泡后的浆料注入到冷冻模具中冷冻，得到冷冻生胚；c.将步骤b所制得的冷冻生胚在真空条件下干燥，得到多孔SiC胚体；d.将步骤c所制得的胚体放入保温箱干燥；e.将步骤d所得到的胚体烧结。本公开的制备工艺简单高效，操作易于控制。
Porous silicon carbide ceramic material and preparation method thereof
多孔碳化硅陶瓷材料及其制备方法
ZHANG JINGDE (author) / LI ZIHE (author) / WEN JIAQIANG (author) / HAN GUIFANG (author)
2020-10-23
Patent
Electronic Resource
Chinese
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