以 Sm2O3为颜料，环氧改性有机硅为粘合剂，采用喷涂法制备了环氧改性有机硅/Sm2O3复合涂层。系统研究了热处理温度及热处理时间对所制备涂层微结构、近红外吸收性能及力学性能的影响。结果表明：环氧改性有机硅 /Sm2O3复合涂层最高可耐受温度可达到 300℃，在 300℃下热处理 5h后，涂层微结构保持不变，对 1.06 .m近红外光的反射率可低至 47.7%，涂层的硬度可达到 4H，附着力 2级，耐冲击强度 40 kg.cm。所制备涂层在 250℃下可长时间使用，在 250℃下热处理 100 h后，涂层微结构仍然保持不变，对 1.06 .m近红外光的反射率可低至 49.7%，涂层的硬度、附着力和耐冲击强度可分别保持在 4 H、2级和 40 kg.cm。

Epoxy-modified silicone/Sm2O3 composite coatings were prepared by using Sm2O3 powders and epoxy-modified silicone as pigments and adhesives, respectively. The effect of heat treatment temperature and heat treatment time on the microstructure, near-infrared absorption properties, and mechanical properties of the as-prepared coatings were systematically studied. The results indicate that the maximum withstand temperature of epoxy-modified silicone/Sm2O3 composite coatings can reach 300℃. After heat treatment at 300℃ with 5 h, the microstructure of the coatings remain unchanged, the near-infrared reflectivity at 1.06μm can be as low as 47.7%, and the hardness, adhesion strength, and impact strength of the coatings can reach 4H, 2 grade, and 40 kg.cm, respectively. The prepared coatings can be used long-term at 250℃, after heat treatment at 250℃ with 100 h, the microstructure of the coatings remain unchanged, the near-infrared reflectivity at 1.06.m can be as low as 49.7%, the hardness, adhesion strength, and impact strength of the coatings can be maintained at 4H, 2 grade, and 40 kg.cm, respectively.