单项掺杂对8YSZ粉体3~5μm波段发射率的影响

Effect of single doped 8YSZ powder on its emissivity in 3-5 μm wavelengths

采用高温固相法对8YSZ粉体分别进行ZnO、Al2O3及Mo O3的单项掺杂,通过XRD、SEM等表征手段,探讨分析单项掺杂影响8YSZ粉体发射率的机理。结果表明：单项掺杂后8YSZ粉体3~5μm波段下的红外发射率从室温~600℃下保持不断降低的趋势,掺杂Al2O3后粉体的发射率整体上升,而掺杂ZnO及Mo O3后的8YSZ粉体发射率整体有所降低;单项掺杂Mo O3的效果最好,掺杂的摩尔分数为5%,样品粉体（Mo O3）0.05（8YSZ）0.95的发射率最低,降至600℃下的0.249。

8YSZ powder was respectively doped by ZnO, A1203 and MoO3 via high temperature solid phase method. The effect mechanism of single-doped powder emissivity was analyzed by XRD and SEM. It is found that emissivity value of the doped powder decreases continuously from room temperature to 600 ℃ in the wavelengths of 3-5 μm. The emissivity of 8YSZ powder is improved integrally when doped by A1203, while the emissivity of the 8YSZ powders is reduced when doped by ZnO and MOO3. The emissivity comes to the lowest value when doped with MoO3 at molar volume of 5%, and it can be reduced to 0.249 at 600 ℃.