Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Microstructure and properties of SiC porous ceramics prepared by carbothermal reduction of iron tailings
Abstract In this study, fine-grained iron tailings, graphite, and SiC powder were used as raw materials to explore a novel strategy for developing SiC porous ceramics from industrial waste. By optimizing the conditions of carbothermal reduction reaction between iron tailings and graphite, the formation and growth of SiC grains were enhanced. The effects of sintering parameters on mechanical and thermal conductivity properties were investigated with adjusting the SiC content in raw materials. SiC porous ceramics with three–dimensional porous structure, adjustable porosity (77.2–91.6%), low bulk density (0.31–0.51 g/cm3), enhanced thermal conductivity (0.22–0.54 W/(m·K)) and compressive strength (0.09–1.61 MPa), and high permeability of deionized water (3.03×10−11–21.03×10−11 m2) are obtained by foam gel-casting forming and reactive sintering process. Meeting industrial requirements for tailings reuse, low cost and high throughput fabrication, this new material combines the properties of high strength and high thermal conductivity of SiC with clay minerals, and has broad prospects in applications of composite phase change materials, lightweight refractory bricks, filter materials and so on.
Highlights A novel method of recycling industrial waste iron tailings is provided. A SiC porous ceramic with high porosity and thermal conductivity was prepared. SiC aids can promote carbothermal reduction reaction between SiO2 and graphite. Heat conductivity of SiC porous ceramic is affected by porosity and holding time. The influence factor of compressive strength of SiC porous ceramics was revealed.
Microstructure and properties of SiC porous ceramics prepared by carbothermal reduction of iron tailings
Abstract In this study, fine-grained iron tailings, graphite, and SiC powder were used as raw materials to explore a novel strategy for developing SiC porous ceramics from industrial waste. By optimizing the conditions of carbothermal reduction reaction between iron tailings and graphite, the formation and growth of SiC grains were enhanced. The effects of sintering parameters on mechanical and thermal conductivity properties were investigated with adjusting the SiC content in raw materials. SiC porous ceramics with three–dimensional porous structure, adjustable porosity (77.2–91.6%), low bulk density (0.31–0.51 g/cm3), enhanced thermal conductivity (0.22–0.54 W/(m·K)) and compressive strength (0.09–1.61 MPa), and high permeability of deionized water (3.03×10−11–21.03×10−11 m2) are obtained by foam gel-casting forming and reactive sintering process. Meeting industrial requirements for tailings reuse, low cost and high throughput fabrication, this new material combines the properties of high strength and high thermal conductivity of SiC with clay minerals, and has broad prospects in applications of composite phase change materials, lightweight refractory bricks, filter materials and so on.
Highlights A novel method of recycling industrial waste iron tailings is provided. A SiC porous ceramic with high porosity and thermal conductivity was prepared. SiC aids can promote carbothermal reduction reaction between SiO2 and graphite. Heat conductivity of SiC porous ceramic is affected by porosity and holding time. The influence factor of compressive strength of SiC porous ceramics was revealed.
Microstructure and properties of SiC porous ceramics prepared by carbothermal reduction of iron tailings
Wu, Songze (Autor:in) / Zhou, Yang (Autor:in) / Gao, Wen (Autor:in) / Zhang, Zhexuan (Autor:in) / Liu, Ao (Autor:in) / Wu, Chong (Autor:in) / Peng, Xingfa (Autor:in) / Li, Shibo (Autor:in) / Li, Cuiwei (Autor:in) / Huang, Zhenying (Autor:in)
27.02.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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