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Graphite-based silicon carbide ceramic composite thermal insulation material and preparation method thereof
The invention provides a graphite-based silicon carbide ceramic composite thermal insulation material and a preparation method thereof. The graphite-based silicon carbide ceramic composite thermal insulation material is mainly composed of natural crystalline flake graphite, silicon carbide, glassy carbon and pores. The preparation method comprises the steps: weighing natural crystalline flake graphite powder, phenolic resin powder, silicon powder and expandable graphite powder, and uniformly mixing in a mechanical stirring manner to obtain graphite-based 3D printing mixed powder; rapidly preparing a graphite prototype model by using a selective laser sintering molding process, and carrying out secondary curing treatment; impregnating liquid phenolic resin under vacuum pressure, drying andcuring; carrying out carbonization treatment; impregnating in a silica sol solution under vacuum pressure, and drying; and sintering at high temperature to obtain the graphite-based silicon carbide ceramic composite thermal insulation material. The heat conductivity coefficient of the prepared graphite-based silicon carbide ceramic composite thermal insulation material is smaller than or equal to2.0 W/m*k, the high compressive strength is larger than or equal to 10 MPa, the graphite-based silicon carbide ceramic composite thermal insulation material can bear impact of high-temperature moltenmetal with the temperature of larger than or equal to 1600 DEG C, and the graphite-based silicon carbide ceramic composite thermal insulation material can be repeatedly used at least 50 times.
本发明提供一种石墨基碳化硅陶瓷复合隔热材料及其制备方法。所述的石墨基碳化硅陶瓷复合隔热材料主要由天然鳞片石墨、碳化硅、玻璃碳和孔隙构成。称取天然鳞片石墨粉末、酚醛树脂粉末、硅粉和可膨胀石墨粉末，采取机械搅拌方式混合均匀，获得石墨基3D打印混合粉末；利用选择性激光烧结成型工艺快速制备石墨原型件，二次固化处理；真空压力浸渍液态酚醛树脂、烘干固化；碳化处理；真空压力浸渍硅溶胶溶液、烘干；高温烧结，获得石墨基碳化硅陶瓷复合隔热材料。所制备的石墨基碳化硅陶瓷复合隔热材料导热系数≤2.0W/m·k、较高的抗压强度≥10MPa、能够承受高温金属液冲击≥1600℃、可重复不少于50次使用。
Graphite-based silicon carbide ceramic composite thermal insulation material and preparation method thereof
The invention provides a graphite-based silicon carbide ceramic composite thermal insulation material and a preparation method thereof. The graphite-based silicon carbide ceramic composite thermal insulation material is mainly composed of natural crystalline flake graphite, silicon carbide, glassy carbon and pores. The preparation method comprises the steps: weighing natural crystalline flake graphite powder, phenolic resin powder, silicon powder and expandable graphite powder, and uniformly mixing in a mechanical stirring manner to obtain graphite-based 3D printing mixed powder; rapidly preparing a graphite prototype model by using a selective laser sintering molding process, and carrying out secondary curing treatment; impregnating liquid phenolic resin under vacuum pressure, drying andcuring; carrying out carbonization treatment; impregnating in a silica sol solution under vacuum pressure, and drying; and sintering at high temperature to obtain the graphite-based silicon carbide ceramic composite thermal insulation material. The heat conductivity coefficient of the prepared graphite-based silicon carbide ceramic composite thermal insulation material is smaller than or equal to2.0 W/m*k, the high compressive strength is larger than or equal to 10 MPa, the graphite-based silicon carbide ceramic composite thermal insulation material can bear impact of high-temperature moltenmetal with the temperature of larger than or equal to 1600 DEG C, and the graphite-based silicon carbide ceramic composite thermal insulation material can be repeatedly used at least 50 times.
本发明提供一种石墨基碳化硅陶瓷复合隔热材料及其制备方法。所述的石墨基碳化硅陶瓷复合隔热材料主要由天然鳞片石墨、碳化硅、玻璃碳和孔隙构成。称取天然鳞片石墨粉末、酚醛树脂粉末、硅粉和可膨胀石墨粉末，采取机械搅拌方式混合均匀，获得石墨基3D打印混合粉末；利用选择性激光烧结成型工艺快速制备石墨原型件，二次固化处理；真空压力浸渍液态酚醛树脂、烘干固化；碳化处理；真空压力浸渍硅溶胶溶液、烘干；高温烧结，获得石墨基碳化硅陶瓷复合隔热材料。所制备的石墨基碳化硅陶瓷复合隔热材料导热系数≤2.0W/m·k、较高的抗压强度≥10MPa、能够承受高温金属液冲击≥1600℃、可重复不少于50次使用。
Graphite-based silicon carbide ceramic composite thermal insulation material and preparation method thereof
一种石墨基碳化硅陶瓷复合隔热材料及其制备方法
WU HAIHUA (author) / WANG ZHIGANG (author) / RICCI PLONG (author) / REN CHAOQUN (author) / ZUO YUE (author) / WANG TAO (author) / WANG HAO (author) / CHEN KUI (author) / SUN YU (author) / YANG ZHAOLI (author)
2020-05-15
Patent
Electronic Resource
Chinese
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