在MgO-Al2O3体系中,铝酸镁尖晶石(MgAl2O4)由于其独特的性能,是一种技术上重要的化合物,包括高熔点,低热导率,优异的抗热震性,化学惰性,和强大的机械强度。这种化合物在耐火材料中具有多种应用,催化剂载体,湿度传感器,核技术,绝缘材料,甚至军事应用。虽然稀土元素通常用作发光材料中的掺杂剂,关于铝酸镁中Tb3+离子掺杂的研究有限。本研究考察了Tb3+掺杂合成铝酸镁材料的发光性能,在这个未充分开发的区域发光。采用燃烧法进行合成,以生产具有特殊发光性能的纳米级粉末而闻名。此外,本研究探讨了Sm3+离子在铝酸镁材料中的掺杂及其发光性能。使用燃烧合成方法,精心检查了Tb3掺杂的MgAl2O4纳米荧光粉的结构属性。通过X射线衍射(XRD)和傅里叶变换红外(FTIR)分析,加上激发和发射光谱,提供了在室温下发光行为的全面调查。XRD数据显示,Tb3掺杂的MgAl2O4荧光粉表现出单相,面心立方结构属于Fd3m空间群,与标准JCPDS文件一致(编号21-1152)。激发和发射光谱为Tb3掺杂的MgAl2O4磷光体内的能量跃迁提供了有价值的见解。此外,这项研究探讨了不同的Tb3+离子浓度对发光性能的影响,揭示了用于最大化发射强度的5wt%Tb的最佳掺杂浓度。浓度猝灭,主要归因于偶极-偶极(d-q)相互作用,在较高的Sm3+浓度下观察到。总之,这项研究增强了我们对发光材料中稀土离子掺杂的理解,并突出了Tb3掺杂的MgAl2O4纳米荧光粉的潜在应用,为各种技术应用提供了希望,包括照明和显示。
In the MgO-Al2O3 system, magnesium aluminate spinel (MgAl2O4) is a technologically significant compound due to its unique properties, including a high melting point, low thermal conductivity, excellent thermal shock resistance, chemical inertness, and robust mechanical strength. This compound has diverse applications in refractory materials, catalyst supports, moisture sensors, nuclear techniques, insulating materials, and even military applications. While rare-earth elements are commonly used as dopants in luminescent materials, limited research exists on doping of Tb3+ ions in magnesium aluminate. This
study investigates the luminescence properties of Tb3+ doped synthesis magnesium aluminate materials, shedding light on this underexplored area. The combustion method is employed for synthesis, known for producing nano-sized powders with exceptional luminescent properties. Additionally, this
study explores Sm3+ ion doping in magnesium aluminate materials and their luminescence properties. Using the combustion synthesis method, structural attributes of Tb3+-doped MgAl2O4 nanophosphors are meticulously examined. Through X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) analyses, coupled with excitation and emission spectra, a comprehensive investigation of the luminescent provide behavior at room temperature is provided. The XRD data reveal Tb3+ doped MgAl2O4 phosphors exhibit a single phase with face centred cubic structure belonging to the Fd3m‾ space group, consistent with the standard JCPDS files (No. 21-1152). Excitation and emission spectra offer valuable insights into the energy transitions within the Tb3+-doped MgAl2O4 phosphors. Furthermore, the
study explores the effects of varying Tb3+ ion concentrations on the luminescent properties, revealing an optimal doping concentration of 5 wt% Tb for maximizing emission intensity. Concentration quenching, primarily attributed to dipole-dipole (d-q) interactions, is observed at higher Sm3+ concentrations. In conclusion, this research enhances our understanding of rare-earth ion doping in luminescent materials and highlights the potential applications of Tb3+-doped MgAl2O4 nanophosphors, which offer promise for various technological applications, including lighting and displays.