Eu^(3+)掺杂ZMCB和ZMLB基光致发光玻璃纤维性能的研究

Performance of Photoluminescence Glass Fiber of Eu^(3+)-Doped ZMCB and ZMLB

在发光粉废料处理中发现用高温固相反应和玻璃流股牵引方法,人工拉制了Eu3+掺杂ZnO MgO CdO B2O3基质的光致发光玻璃纤维,直径为0.01～0.30mm,长10余米。Eu3+离子613nm的强发射归属于5D0-7F2电偶极跃迁,相对613nm发射强度40%的591nm发射归属于5D0-7F1磁偶极跃迁。说明Eu3+在局域环境中主要占据非对称中心格位。对不同浓度Eu3+的光衰曲线进行拟合,发现随着掺杂Eu3+浓度的增加,发光由单指数衰减变为双指数衰减。用SEM观察到玻璃纤维的表面光滑、低析晶、断口质密度高、断口贝纹呈明显沟状。并测试了发光玻璃纤维的一系列力学参数,也研究了Eu3+掺杂ZnO MgO La2O3 B2O3基玻璃纤维的光谱性能。

Photoluminescence glass fibers of Eu^(3+)-doped ZnO-MgO-CdO-B_2O_3 was drawn artificially be high-temperature solid state reaction and glass stream hauling method in handling of photoluminescence waste material. Its diameter was 0.01～0.30 mm and length was more than 10 m. The strong emission band of Eu^(3+) at 613 nm belongs to (()~5D_0-()~7F_2) electric dipole transition, and the emission intensity at 591 nm equivalent to that at 613 nm belongs to (()~5D_0-()~7F_1) magnetic dipole transition. It is known that Eu^(3+) mainly occupies asymmetrical center in lattice in local ambient but also occupies symmetrical center in lattice. By fitting decay curves of Eu^(3+) with different concentrations, it is discovered that the luminescence changes from the first order decay to the second order decay while the concentrations of Eu^(3+) are increased. It is observed by SEM that glass fiber has smooth surface, low crystallization, high density of fracture and shellfish veins of fracture obviously submits ditch form. A series of mechanical parameters were measured and the spectral behaviors of the glass fiber of Eu^(3+) doped ZnO-MgO-CdO-B_2O_3 were studied.