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VACUUM ›› 2026, Vol. 63 ›› Issue (3): 44-48.doi: 10.13385/j.cnki.vacuum.2026.03.06

• Vacuum Metallurgy and Thermal Engineering • Previous Articles     Next Articles

Study on the Effects of Vacuum Sintering on the Structure and Properties of Si-Ca System Steel Slag Ceramics

LIU Xueting, WEI Haibo, CHEN Miao   

  1. Shenyang Urban Construction Institute, Shenyang 110167, China
  • Received:2025-09-12 Online:2026-05-25 Published:2026-06-01

Abstract: This study systematically investigates the effects of vacuum sintering on the sintering behavior, microstructure, and mechanical properties of Si-Ca system steel slag ceramic materials. By comparing the bulk density, water absorption, flexural strength, and microstructural evolution of materials sintered under vacuum and atmospheric conditions, the influence of vacuum environment on the ceramic sintering process was explored. The results indicate that vacuum sintering significantly increases the bulk density and reduces the water absorption of the ceramic materials. The optimal sintering temperature can be reduced by 20℃, while the flexural strength is improved by 10%~12%. Microstructural analysis shows that the vacuum environment promotes the oriented growth and optimized distribution of crystalline phases, resulting in a denser and more homogeneous microstructure. This study provides an effective processing route for low-temperature, high-performance sintering of industrial solid waste-based ceramic materials, and offers valuable reference for advancing solid waste resource utilization and energy-efficient manufacturing technologies.

Key words: vacuum sintering, eco-ceramics, steel slag ceramics, microstructure, mechanical properties

CLC Number:  TQ174.62

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