The low-dielectric inorganic adhesive is an important component of electromagnetic wave absorption coatings due to impedance matching with the atmospheric environment. Herein, high-enthalpy atmospheric plasma spraying (HE-APS) equipment is utilized to prepare Y 2 O 3 ceramic coatings, and the influence of spraying power on dielectric and physical properties of Y 2 O 3 ceramic coatings is systematically investigated. The surface and cross-sectional SEM images of Y 2 O 3 coating show that the overall coating morphology is smooth and less porous at high spraying power. This result is consistent with the trend of coating density and porosity. The XRD pattern demonstrates that the Y 2 O 3 coating possesses a stable cubic structure. The experimental results reveal that the dielectric properties of Y 2 O 3 coating are mainly affected by the porosity. According to the dielectric mixing rule of composite materials, Y 2 O 3 coating exhibits the minimum density of 4.86 g/cm 3 and permittivity of 9.70 under the spraying power of 55 kW. The current work highlights the feasibility of Y 2 O 3 as a low-dielectric inorganic adhesive in the field of electromagnetic wave applications.

中文翻译：

---

高焓常压等离子喷涂工艺参数对Y2O3涂层微波介电性能的影响

由于与大气环境阻抗匹配，低介电无机粘合剂是电磁波吸收涂层的重要组成部分。本文利用高焓常压等离子喷涂(HE-APS)设备制备Y 2 O 3 陶瓷涂层，系统研究了喷涂功率对Y 2 O 3 陶瓷涂层介电和物理性能的影响。Y 2 O 3 涂层的表面和横截面SEM图像表明，在高喷涂功率下，整个涂层形态光滑且孔隙较少。这一结果与涂层密度和孔隙率的趋势一致。XRD图表明Y 2 O 3 涂层具有稳定的立方结构。实验结果表明，Y 2 O 3 涂层的介电性能主要受孔隙率的影响。根据复合材料的介电混合规律，Y 2 O 3 涂层在55 kW喷涂功率下的最小密度为4.86 g/cm 3 ，介电常数为9.70。目前的工作突出了Y 2 O 3 作为低介电无机粘合剂在电磁波应用领域的可行性。