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Preparation method of precursor converted silicon carbide foam ceramics
The invention discloses a preparation method of precursor converted silicon carbide foam ceramics, relating to silicon carbide foam ceramics. The preparation method comprises the steps of preparing solid polycarbosilane; mixing solid polycarbosilane and a dimethylbenzene solution to obtain slurry A; standing organic polyurethane foam into a sodium hydroxide solution, removing redundant a film among the organic foam, cleaning after taking out the foam to obtain a pretreated organic polyurethane foam template, then, placing the organic polyurethane foam template into the slurry A, rolling, soaking the foam template in the slurry A, and discharging the redundant slurry A to obtain a slurry-coated product A; adding dimethylbenzene into solid polycarbosilane to obtain slurry B; soaking the slurry-coated product into the slurry B, and centrifuging to obtain a slurry-coated product B; placing the slurry-coated product B into an air drying oven, and heating to 180-200 DEG C in flowing air to obtain a product G; and placing the product G into a high-temperature furnace, heating to 500 DEG C at the atmosphere of N2 and the speed of 2 DEG C/min, and heating to 800-1200 DEG C at the speed of 5 DEG C/min to obtain the precursor converted silicon carbide foam ceramics.
Preparation method of precursor converted silicon carbide foam ceramics
The invention discloses a preparation method of precursor converted silicon carbide foam ceramics, relating to silicon carbide foam ceramics. The preparation method comprises the steps of preparing solid polycarbosilane; mixing solid polycarbosilane and a dimethylbenzene solution to obtain slurry A; standing organic polyurethane foam into a sodium hydroxide solution, removing redundant a film among the organic foam, cleaning after taking out the foam to obtain a pretreated organic polyurethane foam template, then, placing the organic polyurethane foam template into the slurry A, rolling, soaking the foam template in the slurry A, and discharging the redundant slurry A to obtain a slurry-coated product A; adding dimethylbenzene into solid polycarbosilane to obtain slurry B; soaking the slurry-coated product into the slurry B, and centrifuging to obtain a slurry-coated product B; placing the slurry-coated product B into an air drying oven, and heating to 180-200 DEG C in flowing air to obtain a product G; and placing the product G into a high-temperature furnace, heating to 500 DEG C at the atmosphere of N2 and the speed of 2 DEG C/min, and heating to 800-1200 DEG C at the speed of 5 DEG C/min to obtain the precursor converted silicon carbide foam ceramics.
Preparation method of precursor converted silicon carbide foam ceramics
LI SIWEI (Autor:in) / LI YONGCAI (Autor:in) / XU HAONAN (Autor:in) / LIU XINYA (Autor:in) / ZHANG ZAIRAN (Autor:in) / TANG MING (Autor:in) / TU HUIBIN (Autor:in)
27.01.2016
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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