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Non-oxide ceramic nanowire foam with layered structure and preparation method thereof
The invention relates to non-oxide ceramic nanowire foam with a layered structure and a preparation method thereof. The non-oxide ceramic nanowire foam with a layered structure is characterized in that the volume fraction of a surface layer is higher than that of a core layer, and gradual transition of the volume fractions is realized between layers; and uniform pores are constructed by single crystal nanowires in the layers and are mutually lapped to form a three-dimensional network framework. Through combination of a template method and a polymer conversion method, one-step forming of in-situ synthesized nanowire layered structures with different volume fractions is realized. According to the technical scheme provided by the invention, the preparation process of the non-oxide ceramic nanowire foam with a layered structure is simple in steps, short in period and low in cost. It can be effectively guaranteed that nanowires in layers are pure and evenly distributed, and interlayer bonding is good. The process is reliable and high in repeatability, has the potential to be developed into an engineering and industrial preparation technology of a heat insulation and bearing integrated material used at high temperature, and lays a process foundation for batch production of the heat insulation and bearing integrated material.
本发明涉及一种层状结构非氧化物陶瓷纳米线泡沫及制备方法，其特征在于表层体积分数高于芯层体积分数，层间实现体积分数渐变过渡；层内由单晶纳米线构建均匀的孔隙，相互搭接形成三维网络骨架。通过模板法和聚合物转化法相结合，实现原位自生不同体积分数纳米线层状结构的一步成型。本发明所提供的技术方案制得的层状结构非氧化物陶瓷纳米线泡沫的制备工艺，步骤简单、周期短、成本低。能够有效保证层内纳米线纯净且均匀分布，层间结合良好。该工艺可靠、可重复性高，有潜力发展成为面向高温使用的隔热承载一体化材料的工程化、产业化制备技术，为其批量生产奠定工艺基础。
Non-oxide ceramic nanowire foam with layered structure and preparation method thereof
The invention relates to non-oxide ceramic nanowire foam with a layered structure and a preparation method thereof. The non-oxide ceramic nanowire foam with a layered structure is characterized in that the volume fraction of a surface layer is higher than that of a core layer, and gradual transition of the volume fractions is realized between layers; and uniform pores are constructed by single crystal nanowires in the layers and are mutually lapped to form a three-dimensional network framework. Through combination of a template method and a polymer conversion method, one-step forming of in-situ synthesized nanowire layered structures with different volume fractions is realized. According to the technical scheme provided by the invention, the preparation process of the non-oxide ceramic nanowire foam with a layered structure is simple in steps, short in period and low in cost. It can be effectively guaranteed that nanowires in layers are pure and evenly distributed, and interlayer bonding is good. The process is reliable and high in repeatability, has the potential to be developed into an engineering and industrial preparation technology of a heat insulation and bearing integrated material used at high temperature, and lays a process foundation for batch production of the heat insulation and bearing integrated material.
本发明涉及一种层状结构非氧化物陶瓷纳米线泡沫及制备方法，其特征在于表层体积分数高于芯层体积分数，层间实现体积分数渐变过渡；层内由单晶纳米线构建均匀的孔隙，相互搭接形成三维网络骨架。通过模板法和聚合物转化法相结合，实现原位自生不同体积分数纳米线层状结构的一步成型。本发明所提供的技术方案制得的层状结构非氧化物陶瓷纳米线泡沫的制备工艺，步骤简单、周期短、成本低。能够有效保证层内纳米线纯净且均匀分布，层间结合良好。该工艺可靠、可重复性高，有潜力发展成为面向高温使用的隔热承载一体化材料的工程化、产业化制备技术，为其批量生产奠定工艺基础。
Non-oxide ceramic nanowire foam with layered structure and preparation method thereof
一种层状结构非氧化物陶瓷纳米线泡沫及制备方法
CHENG LAIFEI (author) / YE FANG (author) / GUO CHUCHU (author)
2021-11-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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