Yin Zilong, Chen Henglei, Feng Guangwen, Jing Qun, Muhetaier Mieradilijiang
School of Physics and Technology, Xinjiang University, 830017, Urumqi, China.
School of Physics and Technology, Xinjiang University, 830017, Urumqi, China.
Appl Radiat Isot. 2023 Nov;201:110990. doi: 10.1016/j.apradiso.2023.110990. Epub 2023 Aug 18.
LiMgPO:Dy phosphors were synthesized by high-temperature solid-state method and sol-gel method. The effects of different synthesis methods on crystal structure, morphology, thermoluminescence (TL) properties, and optically stimulated luminescence (OSL) properties of LiMgPO:Dy were studied using X-ray diffraction (XRD), scanning electron microscopy (SEM), TL glow curve and continuous wave OSL (CW-OSL) curves. XRD patterns showed that the crystal phase of the samples synthesized by the two methods is LiMgPO. The morphology of the samples synthesized by sol-gel method was better than that synthesized by high-temperature solid-state method. The TL sensitivity of the samples synthesized by sol-gel method was higher than that synthesized by high-temperature solid-state method. The TL strongest glow peak of the LiMgPO:Dy sample synthesized by high-temperature solid-state method was 363 K, while that the LiMgPO:Dy sample synthesized by sol-gel method was 380 K. The OSL sensitivity of the samples synthesized by sol-gel method was significantly higher than that synthesized by high-temperature solid-state method. The synthesis method had no effect on the OSL decay of the sample. LiMgPO:Dy phosphor synthesized by sol-gel method may be a suitable candidate material for radiation dosimetry.
采用高温固相法和溶胶 - 凝胶法合成了LiMgPO:Dy荧光粉。利用X射线衍射（XRD）、扫描电子显微镜（SEM）、热释光（TL）发光曲线和连续波光激发发光（CW - OSL）曲线研究了不同合成方法对LiMgPO:Dy晶体结构、形貌、热释光性能和光激发发光性能的影响。XRD图谱表明，两种方法合成的样品晶相均为LiMgPO。溶胶 - 凝胶法合成的样品形貌优于高温固相法合成的样品。溶胶 - 凝胶法合成的样品热释光灵敏度高于高温固相法合成的样品。高温固相法合成的LiMgPO:Dy样品热释光最强发光峰为363 K，而溶胶 - 凝胶法合成的LiMgPO:Dy样品为380 K。溶胶 - 凝胶法合成的样品光激发发光灵敏度显著高于高温固相法合成的样品。合成方法对样品的光激发发光衰减没有影响。溶胶 - 凝胶法合成的LiMgPO:Dy荧光粉可能是一种适用于辐射剂量测定的候选材料。
