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Low-cost preparation method of large-size silicon nitride nanobelt aerogel
The invention belongs to the field of novel inorganic nano porous materials, and relates to a low-cost preparation method of large-size silicon nitride nanobelt aerogel. According to the low-cost preparation method of the large-size silicon nitride nanobelt aerogel, metal Si powder and silica sol are used as silicon sources, nitrogen is used as a nitrogen source, a dispersing agent and a foaming agent are added, and a porous SiSiO2 network is formed after foaming, gel curing and pore-forming agent burning; the porous SiSiO2 network is used as a silicon source for generating the silicon nitridenanobelt through a nitridation reaction, and also provides a space and a template for growth of silicon nitride, and along with consumption of the SiSiO2 network in the nitridation reaction, the silicon nitride nanobelt is massively generated, interwoven and interconnected to form macroscopic three-dimensional silicon nitride nanobelt aerogel. The manufacturing cost is reduced, and the technicalproblem that aerogel is difficult to prepare large-size products is solved.
本发明属于新型无机纳米多孔材料领域，涉及一种大尺寸氮化硅纳米带气凝胶的低成本制备方法。涉及的一种大尺寸氮化硅纳米带气凝胶低成本制备方法以金属Si粉和硅溶胶为硅源、氮气为氮源，加入分散剂和发泡剂，经过发泡、凝胶固化、造孔剂排烧后形成多孔Si‑SiO2网络；多孔Si‑SiO2网络作为氮化反应生成氮化硅纳米带的硅源，同时也为氮化硅生长的提供空间和模板，随着氮化反应的进行Si‑SiO2网络被消耗，氮化硅纳米带大量生成且交织互联成宏观的三维氮化硅纳米带气凝胶。本发明降低了制造成本，解决了气凝胶难以制备大尺寸制品的技术难题。
Low-cost preparation method of large-size silicon nitride nanobelt aerogel
The invention belongs to the field of novel inorganic nano porous materials, and relates to a low-cost preparation method of large-size silicon nitride nanobelt aerogel. According to the low-cost preparation method of the large-size silicon nitride nanobelt aerogel, metal Si powder and silica sol are used as silicon sources, nitrogen is used as a nitrogen source, a dispersing agent and a foaming agent are added, and a porous SiSiO2 network is formed after foaming, gel curing and pore-forming agent burning; the porous SiSiO2 network is used as a silicon source for generating the silicon nitridenanobelt through a nitridation reaction, and also provides a space and a template for growth of silicon nitride, and along with consumption of the SiSiO2 network in the nitridation reaction, the silicon nitride nanobelt is massively generated, interwoven and interconnected to form macroscopic three-dimensional silicon nitride nanobelt aerogel. The manufacturing cost is reduced, and the technicalproblem that aerogel is difficult to prepare large-size products is solved.
本发明属于新型无机纳米多孔材料领域，涉及一种大尺寸氮化硅纳米带气凝胶的低成本制备方法。涉及的一种大尺寸氮化硅纳米带气凝胶低成本制备方法以金属Si粉和硅溶胶为硅源、氮气为氮源，加入分散剂和发泡剂，经过发泡、凝胶固化、造孔剂排烧后形成多孔Si‑SiO2网络；多孔Si‑SiO2网络作为氮化反应生成氮化硅纳米带的硅源，同时也为氮化硅生长的提供空间和模板，随着氮化反应的进行Si‑SiO2网络被消耗，氮化硅纳米带大量生成且交织互联成宏观的三维氮化硅纳米带气凝胶。本发明降低了制造成本，解决了气凝胶难以制备大尺寸制品的技术难题。
Low-cost preparation method of large-size silicon nitride nanobelt aerogel
一种大尺寸氮化硅纳米带气凝胶的低成本制备方法
WANG GANG (author) / LIANG PENGPENG (author) / LI HONGXIA (author) / HAN JIANSHEN (author) / YUAN BO (author) / DU PENGHUI (author)
2020-12-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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