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As a member of the MAB phase, Cr2AlB2Cr2AlB2 has become a research hotspot in the field of structural ceramicsCeramic, due to its unique propertiesProperties of both metals and ceramicsCeramic. This paper proposed an electrochemical synthesisSynthesis approach of Cr2AlB2Cr2AlB2 in CaCl2–NaCl, and the thermodynamicThermodynamic feasibility was analyzed. The results indicated that the raw materials formed Al4B2O9 and Al18B4O33 during sinteringSintering below 1200 °C, no chemical reaction occurred between molten saltMolten salt and raw materials. During electrolysisElectrolysis at 700–1000 °C, controlling the experimental voltage range between − 2.37 and − 3.11 V enabled the decomposition of target Cr, Al, and B elements while maintaining molten saltMolten salt stability. And then the reductionReduction sequence of Cr, B, Al formed t Cr2AlB2Cr2AlB2. A formulation design based on a molar ratio of Cr2O3/Al2O3/B2O3 of 1:0.5:1 was established. The thermodynamicThermodynamic results confirmed the theoretical feasibility of preparing Cr2AlB2Cr2AlB2 via the molten salt electrochemical methodMolten salt electrochemical method, providing a theoretical basis for the low-energy consumption and controllable synthesisSynthesis of MAB-phase ceramicsCeramic.

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Thermodynamic Analysis of Cr2AlB2 Synthesized by Molten Salt Electrochemical Method

  • 会议论文

  • 发表日期：

    2026年

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  • Ying Chen,
  • Pengzhen Li,
  • Yang Liu,
  • Hongyan Yan

摘要

As a member of the MAB phase, Cr2AlB2Cr2AlB2 has become a research hotspot in the field of structural ceramicsCeramic, due to its unique propertiesProperties of both metals and ceramicsCeramic. This paper proposed an electrochemical synthesisSynthesis approach of Cr2AlB2Cr2AlB2 in CaCl2–NaCl, and the thermodynamicThermodynamic feasibility was analyzed. The results indicated that the raw materials formed Al4B2O9 and Al18B4O33 during sinteringSintering below 1200 °C, no chemical reaction occurred between molten saltMolten salt and raw materials. During electrolysisElectrolysis at 700–1000 °C, controlling the experimental voltage range between − 2.37 and − 3.11 V enabled the decomposition of target Cr, Al, and B elements while maintaining molten saltMolten salt stability. And then the reductionReduction sequence of Cr, B, Al formed t Cr2AlB2Cr2AlB2. A formulation design based on a molar ratio of Cr2O3/Al2O3/B2O3 of 1:0.5:1 was established. The thermodynamicThermodynamic results confirmed the theoretical feasibility of preparing Cr2AlB2Cr2AlB2 via the molten salt electrochemical methodMolten salt electrochemical method, providing a theoretical basis for the low-energy consumption and controllable synthesisSynthesis of MAB-phase ceramicsCeramic.