GdPO_(4):Sm^(3+)荧光粉的焙烧温度和掺杂浓度的优化及发光和磁性能  

GdPO4:Sm3+phosphor:Optimization of calcination temperature and doping concentration and fluorescence and magnetic properties

作　　者：吴锦绣[1,2,3] 王倩倩 吴宝龙 柳召刚[1,2,3] 胡艳宏 齐源昊[1,2,3] 张晓伟 冯福山[1,2,3] 李健飞 WU Jin‑Xiu;WANG Qian‑Qian;WU Bao‑Long;LIU Zhao‑Gang;HU Yan‑Hong;QI Yuan‑Hao;ZHANG Xiao‑Wei;FENG Fu‑Shan;LI Jian‑Fei(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou,Inner Mongolia 014010,China;Key Laboratory of Green Extraction and Efficient Utilization of Light Rare Earth Resources,Ministry of Education,Baotou,Inner Mongolia 014010,China;Key Laboratory of Rare Earth Hydrometallurgy and Light Rare Earth Application,Inner Mongolia Autonomous Region,Baotou,Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,包头014010 [2]轻稀土资源绿色提取与高效利用教育部重点实验室,包头014010 [3]内蒙古自治区稀土湿法冶金与轻稀土应用重点实验室,包头014010

出　　处：《无机化学学报》2023年第6期1179-1192,共14页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.51965053,51634005);内蒙古自然科学基金(No.2021LHMS05018)资助。

摘　　要：以GdPO_(4)为基质,Sm^(3+)为激活剂,采用水热法合成了纳米荧光粉前驱体,分别在800、900、1000、1100和1200℃下焙烧,得到一系列GdPO_(4):Sm^(3+)荧光粉。首先探究了GdPO_(4):Sm^(3+)的最佳焙烧温度;其次研究了Sm^(3+)掺杂浓度对GdPO_(4):Sm^(3+)荧光性能的影响;最后研究了GdPO_(4):2%Sm^(3+)的高温荧光性能和磁性能。使用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、磁强计和荧光分光光度计(FL)对荧光粉的晶体结构、形貌、发光和磁性能进行了表征。结果表明:荧光粉的晶体结构由前驱体六方晶系GdPO_(4)·H_(2)O:Sm^(3+)变为单斜晶系的GdPO_(4):Sm^(3+),形貌由纳米棒变为无规则块体。当焙烧温度为1000℃,Sm^(3+)掺杂浓度为2%时,荧光粉的发光强度和荧光寿命达到最大值。GdPO_(4):2%Sm^(3+)中Sm^(3+)之间能量传递类型为电偶极-电偶极相互作用,能量传递的临界距离为1.646~1.884 nm。最佳样品Gd PO_(4):2%Sm^(3+)有优异的热稳定性,热猝灭活化能为-0.157 eV,且具有良好的顺磁性,质量磁化率为1.22×10^(-4)emu·g^(-1)·Oe^(-1)。Nano-phosphor precursors were synthesized with GdPO_(4)as the matrix and Sm^(3+)as the activator using the hydrothermal synthesis method.The precursors were calcinated at 800,900,1000,1100,and 1200℃respectively,thus obtaining GdPO_(4):Sm^(3+)phosphors.Firstly,the optimal calcination temperature of GdPO_(4):Sm^(3+)was optimized.Then the effect of Sm^(3+)doping amount on the fluorescence properties of GdPO_(4):Sm^(3+)was studied.The hightemperature fluorescence and magnetic properties of the best product were studied in detail.The crystal structure,morphology,luminescence,and magnetic properties of the phosphors were characterized using an X-ray diffractometer(XRD),scanning electron microscope(SEM),magnetometer,and fluorescence spectrophotometer(FL).The results indicate that the crystal structure of phosphors was changed from the precursor GdPO_(4)·H_(2)O:Sm^(3+)in the hexagonal crystal system to GdPO_(4):Sm^(3+)in the monoclinic crystal system.The morphology was changed from nanorods to like-sphere particles.The luminous intensity and phosphorescence lifetime of the phosphors attained their highest levels when the calcination temperature was 1000℃and the Sm^(3+)doping concentration was 2%.The type of energy transferred between Sm^(3+)in GdPO_(4):2%Sm^(3+)was electric dipole-electric dipole interaction,and the critical distance of energy transfer was about 1.646-1.884 nm.The optimal product GdPO_(4):2%Sm^(3+)had excellent thermal stability,with the thermal quenching activation energy as-0.157 eV.Moreover,it had good paramagnetism,with a mass susceptibility of 1.22×10^(-4)emu·g^(-1)·Oe^(-1).

关 键 词：GdPO_(4):Sm^(3+) 焙烧温度 浓度猝灭机理 发光性能 磁性能 

分 类 号：O614.341[理学—无机化学] O614.337[理学—化学] TB34[一般工业技术—材料科学与工程]