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Composite silicon carbide ceramic powder and preparation method of ceramic separating valve
The invention provides composite silicon carbide ceramic powder and a preparation method of a ceramic separation valve. The composite silicon carbide ceramic powder comprises: 90-98 wt.% of silicon carbide powder master batch; and 2-10 wt% of an additive, wherein the additive comprises carbon nano powder, a carbon nano tube and multi-wall graphene. The preparation method of the ceramic separation valve comprises the following steps: S1, mixing all components of composite silicon carbide ceramic powder to obtain mixed powder; S2, carrying out compression molding on the mixed powder through bidirectional dry pressing, and obtaining a biscuit; S3, heating the biscuit in an inert gas atmosphere, and keeping the temperature at 2000-2200 DEG C for 1-4 hours to obtain a sintered body; and S4, placing the sintered body in a hot isostatic pressing furnace, carrying out heat treatment for 30-120 min at the temperature of 1700-1900 DEG C and the high pressure of 100-180 MPa, and obtaining the ceramic separating valve. According to the composite silicon carbide ceramic powder disclosed by the invention, the nano carbon powder, the carbon nanotubes and the multi-wall graphene are added into the SiC powder, so that the wear resistance and the fracture toughness of SiC ceramic are remarkably improved, and the mechanical property of the ceramic is improved.
本发明提供一种复合碳化硅陶瓷粉料以及陶瓷分离阀的制备方法。复合碳化硅陶瓷粉料含有：碳化硅粉体母料90‑98wt.％；添加剂，2‑10wt％，其中，所述添加剂包括碳纳米粉，碳纳米管，以及多壁石墨烯。陶瓷分离阀的制备方法包括如下步骤：步骤S1，将复合碳化硅陶瓷粉料各组份进行混合，得到混合粉体；步骤S2，将混合粉体采用双向干压进行压制成型，得到素坯；步骤S3，将素坯在惰性气体气氛下加热并在2000‑2200℃下保温1‑4h，得到烧结体；步骤S4，将烧结体置于热等静压炉中，并于1700‑1900℃温度和100‑180MPa的高压下进行热处理30‑120min，得到陶瓷分离阀。根据本发明的复合碳化硅陶瓷粉料，在SiC粉料中加入纳米碳粉、碳纳米管及多壁石墨烯，显著改善了SiC陶瓷耐磨性和断裂韧性，并提高了陶瓷的机械性能。
Composite silicon carbide ceramic powder and preparation method of ceramic separating valve
The invention provides composite silicon carbide ceramic powder and a preparation method of a ceramic separation valve. The composite silicon carbide ceramic powder comprises: 90-98 wt.% of silicon carbide powder master batch; and 2-10 wt% of an additive, wherein the additive comprises carbon nano powder, a carbon nano tube and multi-wall graphene. The preparation method of the ceramic separation valve comprises the following steps: S1, mixing all components of composite silicon carbide ceramic powder to obtain mixed powder; S2, carrying out compression molding on the mixed powder through bidirectional dry pressing, and obtaining a biscuit; S3, heating the biscuit in an inert gas atmosphere, and keeping the temperature at 2000-2200 DEG C for 1-4 hours to obtain a sintered body; and S4, placing the sintered body in a hot isostatic pressing furnace, carrying out heat treatment for 30-120 min at the temperature of 1700-1900 DEG C and the high pressure of 100-180 MPa, and obtaining the ceramic separating valve. According to the composite silicon carbide ceramic powder disclosed by the invention, the nano carbon powder, the carbon nanotubes and the multi-wall graphene are added into the SiC powder, so that the wear resistance and the fracture toughness of SiC ceramic are remarkably improved, and the mechanical property of the ceramic is improved.
本发明提供一种复合碳化硅陶瓷粉料以及陶瓷分离阀的制备方法。复合碳化硅陶瓷粉料含有：碳化硅粉体母料90‑98wt.％；添加剂，2‑10wt％，其中，所述添加剂包括碳纳米粉，碳纳米管，以及多壁石墨烯。陶瓷分离阀的制备方法包括如下步骤：步骤S1，将复合碳化硅陶瓷粉料各组份进行混合，得到混合粉体；步骤S2，将混合粉体采用双向干压进行压制成型，得到素坯；步骤S3，将素坯在惰性气体气氛下加热并在2000‑2200℃下保温1‑4h，得到烧结体；步骤S4，将烧结体置于热等静压炉中，并于1700‑1900℃温度和100‑180MPa的高压下进行热处理30‑120min，得到陶瓷分离阀。根据本发明的复合碳化硅陶瓷粉料，在SiC粉料中加入纳米碳粉、碳纳米管及多壁石墨烯，显著改善了SiC陶瓷耐磨性和断裂韧性，并提高了陶瓷的机械性能。
Composite silicon carbide ceramic powder and preparation method of ceramic separating valve
复合碳化硅陶瓷粉料及陶瓷分离阀的制备方法
ZHAO ZHEN (Autor:in) / MA SONGHUA (Autor:in) / XIE JIE (Autor:in) / XIAN XINGJUAN (Autor:in)
08.02.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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