以无机硅酸盐为粘合剂, 过渡金属氧化物系列粉体为颜填料, 制备出了金属基板上的高发射率涂层, 并对其耐温性及抗热震性能进行研究。通过IR-2 型发射率测量仪器测试了涂层在3～5 μm 波段的发射率, 并分别采用XRD 和SEM 表征了涂层的物相和微观形貌。结果表明：通过对颜填料的球磨和表面改性, 涂层可以耐受1200℃高温, 3～5 μm 波段的发射率在0.9 以上, 并且热震性能也有了显著的提高, 升温速度为5℃/min, 固化温度为600℃, 固化时间为2 h 时, 抗热震性能达到了10 次。

High-emissivity coatings on metal substrate were prepared with silicate inorganic and transitional metal oxides series as adhesive and fillers, respectively. The thermal endurance and thermal shock resistance were investigated. The emissivity in 3～5 μm waveband of the coating was measured by IR-2. The structure and surface morphology of the coatings were characterized by X-ray (XRD) and scanning electron microscope (SEM). The results of experimental investigation indicated that the coatings were greatly improved in resistance to thermal shock which was attributed to the milling and surface modification of the fillers. And the emissivity in 3～5 μm of the coatings was increased to 0.9 and could bear temperature of 1200℃. With the warming rate, curing temperature and curing time of the coating was ste to 5℃/min, 600℃ and 2 h, respectively, the coating kept intact after more than 10 times of alternate heating and cooling.