Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Pressureless sintering preparation method for boron carbide ceramic
The invention relates to a pressureless sintering preparation method for boron carbide ceramic, and coarse particle powder with the particle size larger than 2 micrometers is taken as raw materials. The method comprises the following steps that 70-80 wt % of boron carbide powder (D50>=2 micrometers), 4-8 wt% of carbon powder and 0.7-2 wt% of yttrium oxide powder are put into a ball mill mixing container, ball mill slurrying is performed after binding agents, dispersing agents and deionized water are added, and the solid phase content of obtained slurry is 25-45 wt%; the obtained slurry is prepared into granulating powder with a spray drying granulating machine; the granulating powder is pressed into green bodies by adopting a dry-pressing molding technology or isostatic cool pressing molding technology at 100-200 MPa; the green bodies are placed in a vacuum furnace, a vacuum or normal pressure sintering mode is adopted, heat preservation is performed for 0.5-5 h at the temperature of 2000 DEG C-2300 DEG C, sintering is completed, and then the boron carbide ceramic is obtained. According to the pressureless sintering preparation method for the boron carbide ceramic, due to the fact that the coarse particle boron carbide powder which is low in cost is adopted as the raw materials and the pressureless sintering technology capable of achieving scale production is adopted, the preparation cost of the boron carbide ceramic can be greatly lowered, and therefore the method is suitable for the fields of nuclear power, semiconductor equipment, armor protection and the like.
Pressureless sintering preparation method for boron carbide ceramic
The invention relates to a pressureless sintering preparation method for boron carbide ceramic, and coarse particle powder with the particle size larger than 2 micrometers is taken as raw materials. The method comprises the following steps that 70-80 wt % of boron carbide powder (D50>=2 micrometers), 4-8 wt% of carbon powder and 0.7-2 wt% of yttrium oxide powder are put into a ball mill mixing container, ball mill slurrying is performed after binding agents, dispersing agents and deionized water are added, and the solid phase content of obtained slurry is 25-45 wt%; the obtained slurry is prepared into granulating powder with a spray drying granulating machine; the granulating powder is pressed into green bodies by adopting a dry-pressing molding technology or isostatic cool pressing molding technology at 100-200 MPa; the green bodies are placed in a vacuum furnace, a vacuum or normal pressure sintering mode is adopted, heat preservation is performed for 0.5-5 h at the temperature of 2000 DEG C-2300 DEG C, sintering is completed, and then the boron carbide ceramic is obtained. According to the pressureless sintering preparation method for the boron carbide ceramic, due to the fact that the coarse particle boron carbide powder which is low in cost is adopted as the raw materials and the pressureless sintering technology capable of achieving scale production is adopted, the preparation cost of the boron carbide ceramic can be greatly lowered, and therefore the method is suitable for the fields of nuclear power, semiconductor equipment, armor protection and the like.
Pressureless sintering preparation method for boron carbide ceramic
CAO JIANWU (Autor:in) / LI ZHIPENG (Autor:in) / YAN DONGMING (Autor:in) / WANG JINGHUI (Autor:in) / MOU XIAOMING (Autor:in) / LI KANG (Autor:in) / ZHAO BIN (Autor:in) / JIA SHUBO (Autor:in) / YANG SHUANGYAN (Autor:in) / CHANG YONGWEI (Autor:in)
27.01.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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