Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Porous high-temperature-resistant antioxidant composite ceramic and preparation method thereof
The invention relates to a porous high-temperature-resistant antioxidant high-entropy carbide/silicon-boron-carbon-nitrogen composite ceramic and a preparation method thereof. Polyborosilazane is used as a ceramic precursor, divinylbenzene is used as a cross-linking agent, a high-entropy carbide precursor is used as a modifier, and the porous high-entropy carbide/silicon-boron-carbon-nitrogen composite ceramic is obtained through solvothermal reaction, drying and high-temperature pyrolysis. The porous ceramic has the advantages of high porosity, easiness in adjustment, low heat conductivity, high strength and the like; meanwhile, a high-entropy carbide phase is generated in situ in the porous ceramic by utilizing a carbon thermal reduction reaction in a pyrolysis process, so that the high-temperature stability of the porous silicon-boron-carbon-nitrogen ceramic is greatly improved, and high temperature resistance in an inert atmosphere of 1800 DEG C and oxidation resistance in air of 1400 DEG C are realized. The porous ceramic can be used as materials such as heat insulation/protection, electromagnetic shielding, hot gas filtration and catalytic carriers to be applied to high-temperature fields such as traffic, chemical engineering, energy, aerospace and the like, and meets the requirements of different fields on ultrahigh-temperature porous ceramic materials.
本发明涉及一种多孔耐高温抗氧化高熵碳化物/硅硼碳氮复合陶瓷及制备方法。利用聚硼硅氮烷作为陶瓷前驱体，二乙烯苯作为交联剂，高熵碳化物前驱体为改性剂，经过溶剂热反应、干燥和高温热解获得多孔高熵碳化物/硅硼碳氮复合陶瓷。该多孔陶瓷具备孔隙率大且易调节、热导率低和强度高等优点；同时利用热解过程中的碳热还原反应在多孔陶瓷中原位生成高熵碳化物相，大大提高了多孔硅硼碳氮陶瓷的高温稳定性，实现了1800℃惰性气氛下的耐高温和在1400℃空气下的抗氧化。该多孔陶瓷能够作为隔热/热防护、电磁屏蔽、热气过滤、催化载体等材料应用于交通、化工、能源、航天航空等高温领域，满足了不同领域对超高温多孔陶瓷材料的要求。
Porous high-temperature-resistant antioxidant composite ceramic and preparation method thereof
The invention relates to a porous high-temperature-resistant antioxidant high-entropy carbide/silicon-boron-carbon-nitrogen composite ceramic and a preparation method thereof. Polyborosilazane is used as a ceramic precursor, divinylbenzene is used as a cross-linking agent, a high-entropy carbide precursor is used as a modifier, and the porous high-entropy carbide/silicon-boron-carbon-nitrogen composite ceramic is obtained through solvothermal reaction, drying and high-temperature pyrolysis. The porous ceramic has the advantages of high porosity, easiness in adjustment, low heat conductivity, high strength and the like; meanwhile, a high-entropy carbide phase is generated in situ in the porous ceramic by utilizing a carbon thermal reduction reaction in a pyrolysis process, so that the high-temperature stability of the porous silicon-boron-carbon-nitrogen ceramic is greatly improved, and high temperature resistance in an inert atmosphere of 1800 DEG C and oxidation resistance in air of 1400 DEG C are realized. The porous ceramic can be used as materials such as heat insulation/protection, electromagnetic shielding, hot gas filtration and catalytic carriers to be applied to high-temperature fields such as traffic, chemical engineering, energy, aerospace and the like, and meets the requirements of different fields on ultrahigh-temperature porous ceramic materials.
本发明涉及一种多孔耐高温抗氧化高熵碳化物/硅硼碳氮复合陶瓷及制备方法。利用聚硼硅氮烷作为陶瓷前驱体，二乙烯苯作为交联剂，高熵碳化物前驱体为改性剂，经过溶剂热反应、干燥和高温热解获得多孔高熵碳化物/硅硼碳氮复合陶瓷。该多孔陶瓷具备孔隙率大且易调节、热导率低和强度高等优点；同时利用热解过程中的碳热还原反应在多孔陶瓷中原位生成高熵碳化物相，大大提高了多孔硅硼碳氮陶瓷的高温稳定性，实现了1800℃惰性气氛下的耐高温和在1400℃空气下的抗氧化。该多孔陶瓷能够作为隔热/热防护、电磁屏蔽、热气过滤、催化载体等材料应用于交通、化工、能源、航天航空等高温领域，满足了不同领域对超高温多孔陶瓷材料的要求。
Porous high-temperature-resistant antioxidant composite ceramic and preparation method thereof
一种多孔耐高温抗氧化复合陶瓷及制备方法
SU DONG (Autor:in) / HU ZIFENG (Autor:in) / ZHU WENXIA (Autor:in) / ZHENG YUKUN (Autor:in)
13.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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