Three different double rare-earth modified SrZrO₃ coatings [Sr(Zr_0.9Yb_0.05Gd_0.05)O_2.95 (SZYG-1), Sr(Zr_0.85Yb_0.075Gd_0.075)O_2.925 (SZYG-2) and Sr(Zr_0.8Yb_0.1Gd_0.1)O_2.9 (SZYG-3)] were prepared by solution precursor plasma spray. X-ray diffraction results show that the SZYG-1 coating is composed of SrZrO₃ solid solution and ZrO₂ solid solution with fluorite structure, while the SZYG-2 and SZYG-3 coatings include SrZrO₃ solid solution and rare-earth oxide solid solution with cubic structure. The thermal conductivity of the as-sprayed SZYG-2 coating is 0.69 W m⁻¹ K⁻¹ (1000 °C), which is the lowest among the three modified SrZrO₃ coatings and is about 45% lower than that of SrZrO₃ coating (1.25 W m⁻¹ K⁻¹, 1000 °C). Among the three modified SrZrO₃ coatings, the increase of thermal conductivity of the SZYG-1 coating after heat treatment is the smallest. The thermal expansion coefficients of the as-sprayed SZYG-1, SZYG-2 and SZYG-3 coatings are 10.5 × 10⁻⁶ K⁻¹, 10.5 × 10⁻⁶ K⁻¹ and 10.1 × 10⁻⁶ K⁻¹, respectively. The sintering coefficients of the SZYG-1, SZYG-2 and SZYG-3 coatings are 3.5 × 10⁻⁷ s⁻¹, 6.59 × 10⁻⁶ s⁻¹ and 8 × 10⁻⁶ s⁻¹, respectively. The SZYG-1 coating has the best sintering resistance, followed by the SZYG-2 coating and the SZYG-3 coating. The SZYG-1 coating has good phase stability, low thermal conductivity, better sintering resistance, which is considered as a promising novel TBC material.

三种不同的双稀土改性SrZrO ₃涂层[Sr（Zr _0.9 Yb _0.05 Gd _0.05）O _2.95（SZYG-1），Sr（Zr _0.85 Yb _0.075 Gd _0.075）O _2.925（SZYG-2）和Sr（Zr _0.8 Yb通过溶液前驱体等离子体喷雾制备_0.1 Gd _0.1）O _2.9（SZYG-3）]。X射线衍射结果表明，SZYG-1涂层由具有萤石结构的SrZrO ₃固溶体和ZrO ₂固溶体组成，而SZYG-2和SZYG-3涂层包含SrZrO ₃固溶体和立方结构的稀土氧化物固溶体。喷涂后的SZYG-2涂层的热导率为0.69 W m ^-1  K ^-1（1000°C），在三种改性SrZrO ₃涂层中最低，且比SrZrO ₃涂层低约45％。（1.25 W m ^-1  K ^-1，1000 °C）。在三种改性的SrZrO ₃涂层中，热处理后SZYG-1涂层的导热系数增加最小。的作为喷涂SZYG-1，SZYG-2和SZYG-3涂层是10.5×10的热膨胀系数^-6  ķ ^-1，10.5×10 ^-6  ķ ^-1和分别为10.1×10 ^-6  K ^-1。所述SZYG-1的烧结系数，SZYG-2和SZYG-3涂层是3.5×10 ^-7 小号^-1，6.59×10 ^-6 小号^-1和8×10 ^-6 小号^-1，分别。SZYG-1涂层具有最佳的耐烧结性，其次是SZYG-2涂层和SZYG-3涂层。SZYG-1涂层具有良好的相稳定性，低导热性，更好的抗烧结性，被认为是一种有前途的新型TBC材料。