【摘要】 采用溶胶-凝胶法制备了Sm掺杂羟基磷灰石/氧化钛复合材料,使用X射线衍射（XRD）、光致荧光光谱（PL）和CIE色谱图等对复合材料中Sm掺杂浓度以及复合比例等对其结构及发光性能的影响进行了研究.结果表明,在404 nm波长激发下,复合材料样品出现了Sm³⁺典型的荧光跃迁发射.固定SmHA与TiO₂比例,样品在Sm掺杂量为3 mol%时出现荧光浓度淬灭;当掺Sm浓度固定时,随着氧化钛的比例增大,复合材料的荧光强度增强,荧光寿命逐渐减小.此外复合材料样品的荧光发光颜色处于橙红色区,且其色度坐标随着Sm含量和TiO₂含量的变化可在一定区域内调节.更多还原

【Abstract】 The samarium（Sm） doped hydroxyapatite/titanium oxide composites(denoted as（Sm_xHA/TiO₂（R）） were prepared by sol-gel method herein.The effects of Sm doping concentration and TiO₂ ratio on the structure and luminescent properties of the composites were studied by X-ray diffraction（XRD）,photoluminescence（PL） spectra and CIE chromatic analysis.It is shown that the typical fluorescence transition emission of Sm³⁺ ions occurs near 564,601 and 648 nm under the excitation of 404 nm.The concentration quenching was detected when Sm doping is 3 mol% at a fixed SmHA/TiO₂ ratio.The fluorescence intensity of Sm_xHA/TiO₂（R） composites will increase with the elevated proportion of TiO₂,while the fluorescence lifetime of samples decreases with the TiO₂ increasing.Furthermore,the PL color of samples locate in the red-orange area and their CIE chromaticity coordinates could be adjusted by the content of Sm and TiO₂.更多还原