Effect of Silicon Addition on Microwave Synthesis of Al4SiC4

doi:10.19691/j.cnki.1004-4493.2024.04.002

China's Refractories ›› 2024, Vol. 33 ›› Issue (4): 9-13.DOI: 10.19691/j.cnki.1004-4493.2024.04.002

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Effect of Silicon Addition on Microwave Synthesis of Al₄SiC₄

WANG Li^*, LIU Shijie, WEI Haoyu, MA Juanjuan, DONG Binbin, GENG Shangrui, YAN Miaoxin, QIN Feng, GUO Yusen

Luoyang Institute of Science and Technology, Luoyang 471023, China

Online:2024-12-15 Published:2024-12-12
Contact: *e-mail: wangli6433@sina.com
About author:Wang Li, born in 1968, received his doctor's degree in materials science from Xi'an University of Architecture and Technology in 2013. He serves as a member of Refractories Committee of The Chinese Society for Metals, a member of SAC/TC193 Technical Committee on Refractory of Standardization Administration of China, and a member of Luoyang Green Building Materials Expert Committee. He has presided over and participated in a number of provincial and ministerial level projects. He has published more than 50 papers in China and overseas scientific journals, among which more than 20 papers have been indexed by EI or SCI. He has applied for more than 30 patents and obtained 13 authorized invention patents. He mainly engages in the development and utilization of high-temperature ceramics and industrial solid wastes.

Abstract

Abstract: Al₄SiC₄ was prepared using Al powder, silicon carbide powder, and graphite as raw materials, and silicon as the additive by microwave sintering. Effects of silicon additions (0, 5%, 10% and 15%, by mass) on the phase composition, microstructure, apparent porosity and bulk density of the Al₄SiC₄ sample prepared with different aluminum additions (20%, 25%, by mass) were researched. Then the developed Al₄SiC₄ samples were applied to MgO-C bricks to investigate the effect on the oxidation resistance and mechanical properties of the MgO-C bricks. The results show that Al₄SiC₄ can be synthesized at lower temperatures using the microwave sintering method. The sample with 20% aluminum addition has a lower Al₄SiC₄ content than the one with 25% aluminum. When the silicon addition is 10% and the aluminum addition is 25%, the sample appears needle-like system, the porosity is only 28.69%, and the sample is dense. The developed Al₄SiC₄ was added into MgO-C bricks as the antioxidant, which greatly increased the oxidation resistance and the mechanical properties of the MgO-C bricks.

Key words: silicon, Al₄SiC₄, aluminum, microwave synthesis, oxidation resistance, MgO-C brick

WANG Li, LIU Shijie, WEI Haoyu, MA Juanjuan, DONG Binbin, GENG Shangrui, YAN Miaoxin, QIN Feng, GUO Yusen. Effect of Silicon Addition on Microwave Synthesis of Al₄SiC₄[J]. China's Refractories, 2024, 33(4): 9-13.

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Effect of Silicon Addition on Microwave Synthesis of Al₄SiC₄

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