以AMT、硝酸钇为原料，采用溶胶、喷雾干燥和热还原制备了不同Y₂O₃含量的纳米复合粉末，经成形和高温烧结后制备出100mm×100mm×20mm的板材。采用SEM（JSM-2100F）和TEM（JEM-2100F）对样品的显微组织和形貌进行检测分析，EDS对试样的元素进行定性分析。室温~1200℃的热扩散系数采用激光脉冲（Nachi LFA457）检测。高热冲击试样采用线切割制备成15mm×11mm×3mm的小长条试样，在EMS-600电子束装置完成测试，该装置电压可达150kV、电流400mA，电子束热加载区域为4×4mm²面积内。

Nanocomposite powders with different Y₂O₃ contents were prepared from AMT and yttrium nitrate by sol-gel, spray drying and thermal reduction, and 100mm×100mm×20mm sheets were prepared after forming and high temperature sintering. The microstructure and morphology of the samples were examined and analyzed by SEM (JSM-2100F) and TEM (JEM-2100F), and the elements of the specimens were qualitatively analyzed by EDS. The thermal diffusion coefficients from room temperature to 1200°C were examined by laser pulse (Nachi LFA457). High thermal shock specimens were prepared by wire cutting into small long strips of 15mm×11mm×3mm and tested in EMS-600 electron beam device with voltage up to 150kV and current up to 400mA, and the electron beam thermal loading area was within 4×4mm² area.