退火温度对ZrO2纳米材料中Eu3+离子发光的影响

研究了退火温度对ZrO₂纳米材料中Eu³⁺离子发光性质的影响. 材料的结构、晶粒尺寸和形状以及晶格的排列分别由XRD，TEM表征. 结果表明：用共沉淀法制备的ZrO₂纳米材料具有不随退火温度变化、稳定的四方结构；材料的晶粒尺寸随退火温度的提高而增大；晶格的排列由无序逐渐变为有序；发射光谱表明其主要发射在595 nm和604 nm处；在394 nm的紫外光辐照下得到了不同样品的604 nm荧光发射强度的变化不同. 这种现象与样品中O^2-离子含量和样品表面的表面缺陷有关；另外，电荷迁移带随退火温度的变化而变化.

Effect of annealing temperature on luminescence of nanocrystal ZrO2: Eu3+

Effect of annealing temperature on luminescence of Eu³⁺ ions was studied in nanocrystal zirconia prepared by co-precipitation. The results reveal that the crystal phase and shape of the samples the tetragonal crystal phase is stable and the content of O^2- ions change with annealing temperature increasing. The emission spectra show strong emission at 595 nm and 604 nm. Under UV (394 nm) irradiation the 604 nm emission intensity change from sample to sample. It is related with the difference in surface defects in the surface of the nanocrystalline samples doped with different Eu³⁺ ion concentrations. In addition, the annealing temperature affects the charge transfer of the samples. The result reveals the change of CTB is also relative to the surface defects of the samples.