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<p>Multiscale porous ceramics were fabricated via static magnetic field-assisted freeze casting using Ni magnetic susceptor in aqueous oxide ceramic slurries. The synergistic effect of gradient magnetic fields and directional freezing on Al₂O₃ microstructure evolution was revealed. A 180% magnetic field enhancement increased Ni particle migration flux by 110%, forming lamellar Ni-rich region with magnetic field-perpendicular orientation (bridging ratio: 85%), while Ni-poor region showed random alignment. Comparative analysis of Al₂O₃/SiO₂/ZrO₂/TiO₂ systems demonstrated the adaptability law between ceramic intrinsic properties and magnetic freeze-casting process, establishing theoretical foundation for bio-inspired ceramics.</p>

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Regulation of microstructure of oxide porous ceramics by magnetic freeze casting

  • 期刊论文

  • 发表日期：

    2025年11月9日

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  • Alateng Shaga,
  • Jiong-Zhao Lin,
  • Yong-Hao Meng,
  • Xue-Jian Zhang

摘要

Multiscale porous ceramics were fabricated via static magnetic field-assisted freeze casting using Ni magnetic susceptor in aqueous oxide ceramic slurries. The synergistic effect of gradient magnetic fields and directional freezing on Al₂O₃ microstructure evolution was revealed. A 180% magnetic field enhancement increased Ni particle migration flux by 110%, forming lamellar Ni-rich region with magnetic field-perpendicular orientation (bridging ratio: 85%), while Ni-poor region showed random alignment. Comparative analysis of Al₂O₃/SiO₂/ZrO₂/TiO₂ systems demonstrated the adaptability law between ceramic intrinsic properties and magnetic freeze-casting process, establishing theoretical foundation for bio-inspired ceramics.