Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lightweight and high-strength silicon carbide foamed ceramic and preparation method thereof
The invention discloses lightweight and high-strength silicon carbide foamed ceramic and a preparation method thereof, and belongs to the technical field of foamed ceramic preparation. Polyurethane foam is used as a template, and high-carbon-residue resin and absolute ethyl alcohol are uniformly mixed to prepare slurry with different viscosities. A foamy carbon precursor with a controllable pore rib structure and strength is obtained through the steps of slurry hanging, drying and pyrolysis carbonization, and then the lightweight and high-strength silicon carbide foamed ceramic is prepared through in-situ gas-solid carbon thermal reduction reaction sintering. Compared with a traditional template method, the method of the invention has the following advantages that the residual carbon amount of a carbonized foamy carbon skeleton is regulated by controlling the slurry hanging amount, so that the pore rib structure, porosity and strength of the silicon carbide foamed ceramic product are controlled. The silicon carbide foamed ceramic prepared by the method is of a three-dimensional open-pore internet-shaped skeleton structure, and has the structural characteristics of hollow pore rib core part, smooth and compact pore rib wall and the like, and the product has the characteristics of light weight and high strength.
本发明公开了一种轻质高强碳化硅泡沫陶瓷及其制备方法，属于泡沫陶瓷制备技术领域。本发明以聚氨酯泡沫为模板，将高残碳树脂与无水乙醇混合均匀，制成具有不同粘度的浆料。通过挂浆、干燥及热解碳化的步骤得到孔筋结构和强度可控的泡沫碳前驱体，然后通过原位气固碳热还原反应烧结制得轻质高强碳化硅泡沫陶瓷。与传统的模板法比较，本发明通过控制挂浆量调控碳化后泡沫碳骨架的残碳量，从而实现碳化硅泡沫陶瓷制品孔筋结构、孔隙率和强度的控制。该法制备的碳化硅泡沫陶瓷为三维开孔互联网状骨架结构，具有孔筋芯部中空、孔筋壁光滑致密等结构特点，制品具有轻质、高强的特性。
Lightweight and high-strength silicon carbide foamed ceramic and preparation method thereof
The invention discloses lightweight and high-strength silicon carbide foamed ceramic and a preparation method thereof, and belongs to the technical field of foamed ceramic preparation. Polyurethane foam is used as a template, and high-carbon-residue resin and absolute ethyl alcohol are uniformly mixed to prepare slurry with different viscosities. A foamy carbon precursor with a controllable pore rib structure and strength is obtained through the steps of slurry hanging, drying and pyrolysis carbonization, and then the lightweight and high-strength silicon carbide foamed ceramic is prepared through in-situ gas-solid carbon thermal reduction reaction sintering. Compared with a traditional template method, the method of the invention has the following advantages that the residual carbon amount of a carbonized foamy carbon skeleton is regulated by controlling the slurry hanging amount, so that the pore rib structure, porosity and strength of the silicon carbide foamed ceramic product are controlled. The silicon carbide foamed ceramic prepared by the method is of a three-dimensional open-pore internet-shaped skeleton structure, and has the structural characteristics of hollow pore rib core part, smooth and compact pore rib wall and the like, and the product has the characteristics of light weight and high strength.
本发明公开了一种轻质高强碳化硅泡沫陶瓷及其制备方法，属于泡沫陶瓷制备技术领域。本发明以聚氨酯泡沫为模板，将高残碳树脂与无水乙醇混合均匀，制成具有不同粘度的浆料。通过挂浆、干燥及热解碳化的步骤得到孔筋结构和强度可控的泡沫碳前驱体，然后通过原位气固碳热还原反应烧结制得轻质高强碳化硅泡沫陶瓷。与传统的模板法比较，本发明通过控制挂浆量调控碳化后泡沫碳骨架的残碳量，从而实现碳化硅泡沫陶瓷制品孔筋结构、孔隙率和强度的控制。该法制备的碳化硅泡沫陶瓷为三维开孔互联网状骨架结构，具有孔筋芯部中空、孔筋壁光滑致密等结构特点，制品具有轻质、高强的特性。
Lightweight and high-strength silicon carbide foamed ceramic and preparation method thereof
一种轻质高强碳化硅泡沫陶瓷及其制备方法
SHI ZHONGQI (Autor:in) / YUAN YUAN (Autor:in) / WEI ZHILEI (Autor:in) / ZHOU XIAONAN (Autor:in) / WANG BO (Autor:in) / XIA HONGYAN (Autor:in)
23.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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