SrAl2O4∶Eu,Ho/树脂应力发光薄膜在焊缝缺陷检测中的应用

采用高温固相法合成SrAl_2O_4:Eu,Ho应力发光材料。XRD结果表明,所合成的样品较纯,掺杂离子并未改变基质材料的基体结构。将SrAl_2O_4:Eu,Ho(SAOEH)应力发光粉末与树脂混合制备复合应力发光薄膜。光谱结果表明,薄膜的发光随着厚度的增加而增强;薄膜的SEM结果表明,SAOEH粉体颗粒均匀分散在树脂中。将应力发光薄膜应用于钢板焊缝处背面,应力测试结果表明薄膜应力发光先增强后减弱。当薄膜厚度为0.9 mm时,应力发光最强,且在焊缝处可得到较高的响应值。此外,在循环测试的过程中,应力发光薄膜可对焊板断裂实现实时响应,结合CCD相机可实现钢板焊缝检测的可视化,并对缺陷定位。

Effect of Organic Solvent and Resin on Luminescent Capability of SrAl_2O_4:Eu^(2+),Dy^(3+) Phosphor

Organic substance such as solvent and resin's effect on luminescent capability of SrAl2O4:Eu2+ , Dy3+ phosphor was studied. Some organic solvents and resins were selected for experimentation. The results indicate that those organic solvents will not have negative effect on the applied capability of SrAl2O4:Eu2+ , Dy3+ phosphor. Adopting the organic resins and covering method, the afterglow luminance of SrAl2O4:Eu2+ , Dy3+ phosphor was increased by 85.01% and 82.51%.