Abstract
A ceramic coating with both heat-resistant and electromagnetic (EM) wave absorption performances is prepared by the atmospheric plasma spraying (APS) method. The spraying powder is a composite material mainly containing LaFeO3 and La(Mg/Fe)Al11O19 without EM absorption ability. During APS procedure, a new phase of LaFe12O19 is fabricated by the chemical reaction between Fe2O3 and LaFeO3 at extremely high temperatures. The ceramic coating exhibits larger saturation magnetization (Ms) and higher EM absorption performance than that of the unsprayed sample. The coating Ms is 31 emu/g, and the optimal reflection loss is −39.30 dB at 3.5–5.2 GHz with 4.5 mm thickness. The ceramic coating with both heat-resistant and EM absorption properties is a potential application prospect material in the military industry.
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