A rapid and facile approach was developed for the synthesis of ultrafine SmAlO₃ powders through the combustion of stearic acid precursors. The obtained products were characterized by typical techniques including X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR), thermogravimetric and differential thermal analysis (TG-DTA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) to analyze the phase composition and microstructure. The dielectric characteristics of SmAlO₃ microwave ceramics, using the as-obtained products as original materials, were also studied. Compared with the conventional solid-state reaction method, the synthesis temperature was dramatically reduced to 750 °C. The large-size sheet structure was composed of a number of micro/nano-scale crystallites, which were mostly irregular in shape due to the mutual growth and overlapping shapes of adjacent grains. The SmAlO₃ ceramics with high density and uniform microstructure were obtained after sintering at 1500 °C for 4 h due to the favorable sintering activity of the as-synthesized powders. In addition, desired dielectric properties at microwave frequencies (dielectric constant ε_r = 20.22, quality factor Q·f = 74110 GHz, and a temperature coefficient of resonant frequency τ_f = −74.6 ppm/°C) were achieved.

开发了一种快速，简便的方法，通过燃烧硬脂酸前体来合成超细SmAlO ₃粉末。所得产物通过典型技术进行表征，包括X射线衍射（XRD），傅立叶变换红外（FT-IR），热重和差热分析（​​TG-DTA），扫描电子显微镜（SEM）和透射电子显微镜（TEM） ）分析相组成和微观结构。SmAlO ₃的介电特性还研究了使用所获得的产品作为原始材料的微波陶瓷。与传统的固态反应方法相比，合成温度显着降低至750°C。大尺寸片状结构由许多微/纳米级微晶组成，由于相邻晶粒的相互生长和重叠形状，它们的形状大多不规则。由于合成后的粉末具有良好的烧结活性，在1500°C烧结4 h后，获得了具有高密度和均匀组织的SmAlO ₃陶瓷。此外，所希望的介电特性在微波频率（介电常数ε _{- [R} = 20.22，品质因数Q · ˚F= 74110千兆赫，及谐振频率的温度系数τ _˚F = -74.6 PPM /℃）来实现。