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发明授权
CN108841311B 一种稀土掺杂纳米氧化铝粉体红外隐身涂层 有权

一种稀土掺杂纳米氧化铝粉体红外隐身涂层
摘要：
本发明涉及一种稀土掺杂纳米氧化铝粉体红外隐身涂层，采用AlCl3·6H2O、ErCl3和Na2CO3以2.5~4∶0.025~0.038∶5的摩尔比，通过直接沉淀法制备粒径在20~50 nm范围的稀土掺杂纳米Al2O3粉体；再利用硅烷偶联剂KH570对稀土掺杂纳米Al2O3粉体进行改性，其中KH570的用量是稀土掺杂纳米Al2O3粉体质量的6%~12%；将改性稀土掺杂纳米Al2O3粉体按1 g/mL的比例分散于无水乙醇中，并与聚氨酯混合后再喷涂于铝基片上，后经固化得到稀土掺杂纳米Al2O3粉体红外隐身涂层，其中稀土掺杂纳米Al2O3与聚氨酯的质量比为1~2∶3。本发明制备工艺简便，红外隐身涂层密度小、红外反射率低、透明度高，具有良好的物理、机械和化学性能。
摘要（英）：

The invention relates to an infrared stealth coating containing rare-earth-doped nano Al2O3 powder. The rare-earth-doped nano Al2O3 powder with the particle size ranging from 20 nm to 50 nm is prepared from AlCl3*6H2O, ErCl3 and Na2CO3 which are in the mole ratio being (2.5-4):(0.025-0.038):5 with the direct precipitation method; then the rare-earth-doped nano Al2O3 powder is modified by a silanecoupling agent KH570 which accounts for 6%-12% of the rare-earth-doped nano Al2O3 powder in mass; the modified rare-earth-doped nano Al2O3 powder is dispersed in absolute ethyl alcohol in the proportion of 1 g/mL, the solution is mixed with polyurethane, then the solution is sprayed to an aluminum substrate, the infrared stealth coating containing the rare-earth-doped nano Al2O3 powder is obtainedthrough curing, and the mass ratio of rare-earth-doped nano Al2O3 to the polyurethane is (1-2):3. The preparation technology is simple, and the infrared stealth coating is low in density, low in infrared reflectivity and high in transparency and has the good physical, mechanical and chemical properties.

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