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Preparation method of silicon carbide ceramic and silicon carbide ceramic material prepared by preparation method
The invention provides a preparation method of silicon carbide ceramic. The preparation method comprises the following steps: step 1, mixing: uniformly mixing silicon carbide powder, carbon black, a pore forming agent, an adhesive and silicon particles; step 2, granulation: pressurizing the uniformly mixed powder, sieving and granulating; step 3, compression molding: performing cold isostatic pressing molding on the granules obtained by granulation in the step 2 to prepare a biscuit; step 4, drying, curing and debonding; and step 5, high-temperature siliconing reaction sintering. By adopting the preparation method disclosed by the invention, the large-size block silicon carbide ceramic material with the thickness of 50-150mm can be prepared, and the silicon absorption height of the silicon carbide ceramic biscuit is increased by adding the pore-forming agent, so that the penetration depth of liquid-phase silicon is enough, the bending strength of the prepared silicon carbide ceramic material is increased, and the appearance of the prepared silicon carbide ceramic material is not cracked.
本发明提供一种碳化硅陶瓷的制备方法，包括如下步骤：步骤1、混料：将碳化硅粉末、炭黑、造孔剂、粘接剂和硅粒混合均匀；步骤2、造粒：将混匀的粉料加压后过筛造粒；步骤3、模压成型：将步骤2造粒得到的团粒冷等静压压制成型，制成素坯；步骤4、烘干、固化脱粘；步骤5、高温渗硅反应烧结。采用本发明的制备方法，可制得厚度在50‑150mm之间的大尺寸块体碳化硅陶瓷材料，通过造孔剂的加入，碳化硅陶瓷素坯的吸硅高度增加，说明液相硅的渗透深度足够，制得的碳化硅陶瓷材料的抗弯强度增加，外观不开裂。
Preparation method of silicon carbide ceramic and silicon carbide ceramic material prepared by preparation method
The invention provides a preparation method of silicon carbide ceramic. The preparation method comprises the following steps: step 1, mixing: uniformly mixing silicon carbide powder, carbon black, a pore forming agent, an adhesive and silicon particles; step 2, granulation: pressurizing the uniformly mixed powder, sieving and granulating; step 3, compression molding: performing cold isostatic pressing molding on the granules obtained by granulation in the step 2 to prepare a biscuit; step 4, drying, curing and debonding; and step 5, high-temperature siliconing reaction sintering. By adopting the preparation method disclosed by the invention, the large-size block silicon carbide ceramic material with the thickness of 50-150mm can be prepared, and the silicon absorption height of the silicon carbide ceramic biscuit is increased by adding the pore-forming agent, so that the penetration depth of liquid-phase silicon is enough, the bending strength of the prepared silicon carbide ceramic material is increased, and the appearance of the prepared silicon carbide ceramic material is not cracked.
本发明提供一种碳化硅陶瓷的制备方法，包括如下步骤：步骤1、混料：将碳化硅粉末、炭黑、造孔剂、粘接剂和硅粒混合均匀；步骤2、造粒：将混匀的粉料加压后过筛造粒；步骤3、模压成型：将步骤2造粒得到的团粒冷等静压压制成型，制成素坯；步骤4、烘干、固化脱粘；步骤5、高温渗硅反应烧结。采用本发明的制备方法，可制得厚度在50‑150mm之间的大尺寸块体碳化硅陶瓷材料，通过造孔剂的加入，碳化硅陶瓷素坯的吸硅高度增加，说明液相硅的渗透深度足够，制得的碳化硅陶瓷材料的抗弯强度增加，外观不开裂。
Preparation method of silicon carbide ceramic and silicon carbide ceramic material prepared by preparation method
一种碳化硅陶瓷的制备方法和由该制备方法制备的碳化硅陶瓷材料
HUANG YIHUA (author) / HUANG ZHENGREN (author) / LIU XUEJIAN (author) / CHEN ZHONGMING (author) / SUN ANLE (author)
2023-04-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2023
| European Patent Office | 2015
| European Patent Office | 2015