Multicomponent rare-earth oxide-doped zirconia-based thermal barrier coatings (TBCs) are attractive alternatives for yttria-stabilized zirconia (YSZ) in advanced TBC applications. In this study, a zirconia-based nanopowder doped by multiple rare-earth oxides ((La_1-xGd_x)₂Zr₂O₇; x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 1) was synthesized using sol-gel and calcination method. The product was then characterized by X-ray diffraction (XRD), simultaneous thermal analysis (STA), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, and dilatometric test. According to STA results, the proper calcination temperature of (La_1-xGd_x)₂Zr₂O₇ nanopowders could be considered > 800 °C. The results indicated that Gd₂Zr₂O₇ exhibits a defect fluorite-type structure, and with the incorporation of larger La³⁺, it transformed into an ordered pyrochlore-type structure. The microstructure and morphology of the product were studied by field emission scanning electron microscopy (FESEM), revealing the formation of (La_1-xGd_x)₂Zr₂O₇ nanoparticles with the mean size below 100 nm. Also, the thermal expansion coefficient of (La_1-xGd_x)₂Zr₂O₇ nanoparticles was determined 8–12.5 × 10⁻⁶ K⁻¹ at 1000 °C.

多组分稀土氧化物掺杂的氧化锆基热障涂层（TBC）是先进的TBC应用中氧化钇稳定的氧化锆（YSZ）的有吸引力的替代品。在这项研究中，使用多种稀土氧化物（（La _1-x Gd _x）₂ Zr ₂ O ₇ ; x  = 0，0.1，0.2，0.3，0.4，0.5，1）掺杂的氧化锆基纳米粉溶胶-凝胶法和煅烧法。然后通过X射线衍射（XRD），同时热分析（STA），傅里叶变换红外（FTIR）光谱，拉曼光谱和膨胀计测试对产品进行表征。根据STA结果，适当的煅烧温度为（La _1-x Gd _x）可以认为₂ Zr ₂ O ₇纳米粉> 800°C。结果表明，Gd ₂ Zr ₂ O ₇呈现出萤石型缺陷结构，随着较大的La ³⁺的引入，其转变为有序的烧绿石型结构。通过场发射扫描电子显微镜（FESEM）研究了产物的微观结构和形态，揭示了平均尺寸小于100nm的（La _1-x Gd _x）₂ Zr ₂ O ₇纳米颗粒的形成。另外，热膨胀系数为（La _1-x Gd _x）在1000°C下测得₂ Zr ₂ O ₇纳米粒子为8–12.5×10 ^-6  K ^-1。