A glycine-nitrate self-propagating high-temperature synthesis (SHS) was developed to produce composite MgO-Gd₂O₃ nanopowders. The X-ray powder diffraction (XRD) analysis confirmed the SHS-product consists of cubic MgO and Gd₂O₃ phases with nanometer crystallite size and retains this structure after annealing at temperatures up to 1200 °C. Near full dense high IR-transparent composite ceramics were fabricated by spark plasma sintering (SPS) at 1140 °C and 60 MPa. The in-line transmittance of 1 mm thick MgO-Gd₂O₃ ceramics exceeded 70% in the range of 4–5 mm and reached a maximum of 77% at a wavelength of 5.3 mm. The measured microhardness HV0.5 of the MgO-Gd₂O₃ ceramics is 9.5±0.4 GPa, while the fracture toughness (K_IC) amounted to 2.0±0.5 MPa·m^1/2. These characteristics demonstrate that obtained composite MgO-Gd₂O₃ ceramic is a promising material for protective infra-red (IR) windows.

开发了甘氨酸-硝酸盐自蔓延高温合成（SHS）以生产复合MgO-Gd ₂ O ₃纳米粉。X射线粉末衍射（XRD）分析证实SHS产物由具有纳米微晶尺寸的立方MgO和Gd ₂ O ₃相组成，并在高达1200°C的温度退火后保留了该结构。通过在1140°C和60 MPa下的火花等离子体烧结（SPS）制备了近满密度的高IR透明复合陶瓷。1 mm厚的MgO-Gd ₂ O ₃陶瓷的在线透射率在4-5 mm的范围内超过70％，并且在5.3 mm的波长下达到77％的最大值。MgO-Gd ₂的测得的显微硬度HV0.5O ₃陶瓷为9.5±0.4 GPa，断裂韧性（K _IC）为2.0±0.5 MPa·m ^1/2。这些特性表明，所获得的复合MgO-Gd ₂ O ₃陶瓷是用于保护红外（IR）窗口的有前途的材料。