旋流雾化火焰合成钇–镁复相纳米粉体及红外透明陶瓷性能研究

Y₂O₃-MgO composite ceramics are promising candidates for the next-generation infrared transmittance window materials due to their ability to maintain low infrared emissivity and exhibit excellent optical and mechanical properties at high temperatures. In this paper, we investigate the process of swirling spray flame synthesis of Y₂O₃-MgO nanoparticles, demonstrating that cubic-phase Y₂O₃-MgO nanoparticles with a narrow particle size distribution and homogeneous mixing can be successfully synthesized by adding equivalent 2-ethylhexanoic acid (EHA) and adjusting the precursor concentration. The solid solubility limit of MgO in Y₂O₃ is further explored, showing that spray flame synthesis can extend MgO solubility in Y₂O₃ to 70%(mol), which is 10 times higher than that of the conventional phase diagram (≈7%). Finally, infrared transparent ceramics with a transmittance as high as 83.8% were fabricated using solid solution nanoparticles with uniform particle size by spray flame synthesis.