In order to enhance the sintering resistance of lanthanum aluminate based high emissivity coatings, Ca2+-Fe3+ doped LaAlO3/ZrO2 specimens were prepared by solid state sintering using La2O3, Al2O3, CaCO3 and Fe2O3 as raw materials, extra-adding fused Y2O3-stabilized ZrO2 (0, 5%, 10%, and 15%, by mass), ball milling, pre-calcining, pressing into shapes and sintering at 1 600 ℃ for 2 h. The effect of the ZrO2 addition on the properties of lanthanum aluminate based high emissivity coatings was explored. It is concluded that ZrO2 does not react with LaAlO3, which can inhibit the sintering of the specimens. With the increase of the ZrO2 addition, the linear shrinkage rate and the thermal conductivity decrease significantly, while the emissivity decreases, but the emissivity of all the specimens is all higher than 0.9. The optimal addition of ZrO2 is 10%.