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Method for improving mechanical property and heat-insulating property of silicon carbide nanowire aerogel through oxidation treatment
The invention discloses a method for improving the mechanical property and heat-insulating property of silicon carbide nanowire aerogel through oxidation treatment, and belongs to the technical field of preparation of silicon carbide aerogel. The thickness of an oxide layer of the silicon carbide nanowire aerogel is regulated and controlled through reasonable oxidation treatment, the microstructure of the silicon carbide nanowire is changed by means of the oxide layer, the number of nodes in a silicon carbide nanowire network is increased, and meanwhile the strength and the elasticity are improved; the intrinsic thermal conductivity of silicon oxide is far lower than that of silicon carbide, and the content of silicon oxide is increased, so that the thermal conductivity of the oxidized silicon carbide nanowire aerogel is reduced; a silicon carbide/silicon oxide interface is introduced, phonon scattering is enhanced, and the mechanical property and the heat insulation property of the silicon carbide nanowire aerogel are improved at the same time. According to the preparation method disclosed by the invention, the mechanical property and the heat-insulating property of the silicon carbide nanowire aerogel are improved through simple oxidation treatment, and the practical application of the silicon carbide nanowire aerogel is favorably promoted.
本发明公开了一种通过氧化处理提高碳化硅纳米线气凝胶力学性能和隔热性能的方法，属于碳化硅气凝胶的制备技术领域。通过合理的氧化处理调控碳化硅纳米线气凝胶的氧化层厚度，借助氧化层改变碳化硅纳米线的微观结构，增加了碳化硅纳米线网络中的节点数量，同时提升了强度和弹性；氧化硅的本征热导率远低于碳化硅，氧化硅的含量增加，导致氧化后的碳化硅纳米线气凝胶的热导率降低；引入碳化硅/氧化硅界面，增强声子散射，实现了同时提高碳化硅纳米线气凝胶的力学性能和隔热性能。本发明通过简单的氧化处理实现了碳化硅纳米线气凝胶的力学性能和隔热性能的提高，有助于推进碳化硅纳米线气凝胶的实际应用。
Method for improving mechanical property and heat-insulating property of silicon carbide nanowire aerogel through oxidation treatment
The invention discloses a method for improving the mechanical property and heat-insulating property of silicon carbide nanowire aerogel through oxidation treatment, and belongs to the technical field of preparation of silicon carbide aerogel. The thickness of an oxide layer of the silicon carbide nanowire aerogel is regulated and controlled through reasonable oxidation treatment, the microstructure of the silicon carbide nanowire is changed by means of the oxide layer, the number of nodes in a silicon carbide nanowire network is increased, and meanwhile the strength and the elasticity are improved; the intrinsic thermal conductivity of silicon oxide is far lower than that of silicon carbide, and the content of silicon oxide is increased, so that the thermal conductivity of the oxidized silicon carbide nanowire aerogel is reduced; a silicon carbide/silicon oxide interface is introduced, phonon scattering is enhanced, and the mechanical property and the heat insulation property of the silicon carbide nanowire aerogel are improved at the same time. According to the preparation method disclosed by the invention, the mechanical property and the heat-insulating property of the silicon carbide nanowire aerogel are improved through simple oxidation treatment, and the practical application of the silicon carbide nanowire aerogel is favorably promoted.
本发明公开了一种通过氧化处理提高碳化硅纳米线气凝胶力学性能和隔热性能的方法，属于碳化硅气凝胶的制备技术领域。通过合理的氧化处理调控碳化硅纳米线气凝胶的氧化层厚度，借助氧化层改变碳化硅纳米线的微观结构，增加了碳化硅纳米线网络中的节点数量，同时提升了强度和弹性；氧化硅的本征热导率远低于碳化硅，氧化硅的含量增加，导致氧化后的碳化硅纳米线气凝胶的热导率降低；引入碳化硅/氧化硅界面，增强声子散射，实现了同时提高碳化硅纳米线气凝胶的力学性能和隔热性能。本发明通过简单的氧化处理实现了碳化硅纳米线气凝胶的力学性能和隔热性能的提高，有助于推进碳化硅纳米线气凝胶的实际应用。
Method for improving mechanical property and heat-insulating property of silicon carbide nanowire aerogel through oxidation treatment
一种通过氧化处理提高碳化硅纳米线气凝胶力学性能和隔热性能的方法
WANG HONGJIE (author) / QU RUINA (author) / LU DE (author) / NIU MIN (author) / SU LEI (author) / PENG KANG (author) / ZHUANG LEI (author)
2022-07-22
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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