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MagnesiumMagnesium tantalate has demonstrated promise for use in thermal barrier ceramicsCeramic due to its excellent thermal propertiesProperties and low cost. This study investigated the formation conditions and phase relationships of magnesiumMagnesium tantalates with different stoichiometric ratios, resulting in the synthesisSynthesis of single-phase MgTa2O6 and Mg4Ta2O9. The thermodynamicThermodynamic data for the reactions between MgO and Ta2O5 to form magnesiumMagnesium tantalate were obtained via thermodynamicThermodynamic calculations using the measured heat capacities of MgTa2O6 and Mg4Ta2O9. MgTa2O6 and Mg4Ta2O9 were fabricated separately based on the effects of temperatureTemperature, preforming pressure, and morphology of raw material tantalum pentoxide on the phase composition and microstructureMicrostructure of magnesiumMagnesium tantalate. The comprehensive performance and manufacturing cost of MgTa2O6 and Mg4Ta2O9 ceramicsCeramic were evaluated. Mg4Ta2O9 ceramicCeramic has the advantage of comprehensive performance and manufacturing cost relative to conventional rare-earth tantalate and yttria-stabilized zirconia (YSZ), which is a promising alternative for next-generation thermal barrier coatingsThermal barrier coating (TBCs) applications.

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Preparation of Magnesium Tantalate Ceramics Guided by High-Temperature Phase Relationships in Ta2O5–MgO System

  • 会议论文

  • 发表日期：

    2026年

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  • Yinghan Liu,
  • Ruifang Wang,
  • Yichen Xing,
  • Yufei Shi,
  • Yusi Che,
  • Jilin He

摘要

MagnesiumMagnesium tantalate has demonstrated promise for use in thermal barrier ceramicsCeramic due to its excellent thermal propertiesProperties and low cost. This study investigated the formation conditions and phase relationships of magnesiumMagnesium tantalates with different stoichiometric ratios, resulting in the synthesisSynthesis of single-phase MgTa2O6 and Mg4Ta2O9. The thermodynamicThermodynamic data for the reactions between MgO and Ta2O5 to form magnesiumMagnesium tantalate were obtained via thermodynamicThermodynamic calculations using the measured heat capacities of MgTa2O6 and Mg4Ta2O9. MgTa2O6 and Mg4Ta2O9 were fabricated separately based on the effects of temperatureTemperature, preforming pressure, and morphology of raw material tantalum pentoxide on the phase composition and microstructureMicrostructure of magnesiumMagnesium tantalate. The comprehensive performance and manufacturing cost of MgTa2O6 and Mg4Ta2O9 ceramicsCeramic were evaluated. Mg4Ta2O9 ceramicCeramic has the advantage of comprehensive performance and manufacturing cost relative to conventional rare-earth tantalate and yttria-stabilized zirconia (YSZ), which is a promising alternative for next-generation thermal barrier coatingsThermal barrier coating (TBCs) applications.