Dy³⁺ doped Sr₂MgSi₂O₇ (0–11 mol%) nanopowders were prepared by low-temperature solution combustion technique which is based on the propellant chemistry concepts. Powder X-ray diffraction study confirms the crystalline nature with a crystallite size of about 30 nm and single-phase formation with space group P4̅2₁m. The optical band gap and refractive indices were estimated by diffused reflectance spectroscopy. Purity of the samples and the molecular bonding strengths were identified through Fourier-transform infrared spectroscopy. Transmission electron microscopic images shows the rod-like shape with polycrystalline nature. Scanning electron microscope indicates the non-uniform and irregular shaped particles. Photoluminescence studies exhibited emission peaks at 479 nm (blue), 575 nm (yellow) and 668 nm (red) for the excitation wavelength at 348 nm attributes to white light-emission. The intensity parameters and various radiative properties were estimated using the Judd- Ofelt theory to support the optical transitions. AC Conductivity, dielectric constant studies were studied in the range of 10 Hz to 10 MHz and DC conductivity behaviors were also reported at room temperature. Prepared samples showed the high dielectric constant with low dielectric loss. Hence, these silicate samples are useful for white LED components and as an electrical insulation material in nanopacking applications.

Dy ³⁺掺杂的Sr ₂ MgSi ₂ O ₇（0-11 mol％）纳米粉是根据推进剂化学概念通过低温溶液燃烧技术制备的。粉末X射线衍射研究证实结晶性质具有约30纳米的微晶尺寸和空间群为P42单相形成₁米 光学带隙和折射率通过漫反射光谱法估计。通过傅立叶变换红外光谱法鉴定样品的纯度和分子结合强度。透射电子显微镜图像显示具有多晶性质的棒状形状。扫描电子显微镜显示不均匀和不规则形状的颗粒。光致发光研究显示，在348 nm的激发波长下，在479 nm（蓝色），575 nm（黄色）和668 nm（红色）处的发射峰归因于白光发射。使用Judd-Ofelt理论估算强度参数和各种辐射特性以支持光学跃迁。交流电导率 介电常数研究在10 Hz至10 MHz的范围内进行，还报道了室温下的直流电导率行为。制备的样品显示出高介电常数和低介电损耗。因此，这些硅酸盐样品可用于白色LED组件，并在纳米包装应用中用作电绝缘材料。