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Hierarchical pore ceramic sponge material with low-thermal-conductivity nanofiber framework and preparation method
The invention relates to the technical field of novel hierarchical pore materials and nanofiber materials, and provides a hierarchical pore ceramic sponge material with a low-thermal-conductivity nanofiber framework and a preparation method, and the preparation method comprises the following steps: preparing uniformly dispersed mixed slurry from silica sol, water-soluble carbon black and monatomicsilicon as raw materials for the first time; carrying out vacuum degassing, freezing injection molding and freeze drying on the mixed slurry to obtain a porous blank with a straight-through hole structure; and carrying out reactive sintering on the porous blank to obtain the hierarchical pore ceramic sponge material with the low-thermal-conductivity nanofiber framework. The method has the characteristics of low cost, no need of expensive equipment, simple process, high-efficiency synthesis and easiness in industrial production, and the obtained novel foamed ceramic has excellent comprehensiveproperties of low volume density, good permeability, high specific surface area and low thermal conductivity.
本发明涉及新型多级孔材料、纳米纤维材料技术领域，提供了一种低热导率纳米纤维构架的多级孔陶瓷海绵材料及制备方法，所述制备方法首次以硅溶胶、水溶性炭黑、单质硅为原料制备均匀分散的混合浆料；所述混合浆料经真空除气、冷冻注模、冷冻干燥制得直通孔结构的多孔坯体；所述多孔坯体通过反应烧结得到所述低热导率纳米纤维构架的多级孔陶瓷海绵材料。本发明具有低成本、无需高昂设备、工艺简单、高效合成、易于工业化生产的特点，所得新型泡沫陶瓷综合性能优越：低体积密度、良好渗透性、高比表面积、低热导率。
Hierarchical pore ceramic sponge material with low-thermal-conductivity nanofiber framework and preparation method
The invention relates to the technical field of novel hierarchical pore materials and nanofiber materials, and provides a hierarchical pore ceramic sponge material with a low-thermal-conductivity nanofiber framework and a preparation method, and the preparation method comprises the following steps: preparing uniformly dispersed mixed slurry from silica sol, water-soluble carbon black and monatomicsilicon as raw materials for the first time; carrying out vacuum degassing, freezing injection molding and freeze drying on the mixed slurry to obtain a porous blank with a straight-through hole structure; and carrying out reactive sintering on the porous blank to obtain the hierarchical pore ceramic sponge material with the low-thermal-conductivity nanofiber framework. The method has the characteristics of low cost, no need of expensive equipment, simple process, high-efficiency synthesis and easiness in industrial production, and the obtained novel foamed ceramic has excellent comprehensiveproperties of low volume density, good permeability, high specific surface area and low thermal conductivity.
本发明涉及新型多级孔材料、纳米纤维材料技术领域，提供了一种低热导率纳米纤维构架的多级孔陶瓷海绵材料及制备方法，所述制备方法首次以硅溶胶、水溶性炭黑、单质硅为原料制备均匀分散的混合浆料；所述混合浆料经真空除气、冷冻注模、冷冻干燥制得直通孔结构的多孔坯体；所述多孔坯体通过反应烧结得到所述低热导率纳米纤维构架的多级孔陶瓷海绵材料。本发明具有低成本、无需高昂设备、工艺简单、高效合成、易于工业化生产的特点，所得新型泡沫陶瓷综合性能优越：低体积密度、良好渗透性、高比表面积、低热导率。
Hierarchical pore ceramic sponge material with low-thermal-conductivity nanofiber framework and preparation method
低热导率纳米纤维构架的多级孔陶瓷海绵材料及制备方法
ZHANG XIAOYAN (author) / ZHANG SHENGEN (author) / LIU BO (author) / DING YUNJI (author)
2020-09-04
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
/
D04H
Herstellen von flächigem Textilgut, z.B. aus Fasern oder fadenförmigem Material
,
MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL
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