Thermal barrier coatings (TBCs) is the key technology for the hypersonic aircraft and the aero-engine. At present, yttria stalized zirconia (YSZ) is widely used as the thermal barrier coatings ceramic top-coatings. However, it cannot use for the next generation of engine in the future, owing to the volume difference caused by T–M phase transformation of ZrO2. Obviously, it is imperative to find a kind of more advanced TBCs. The experiments have shown that the rare earth tantalate prepared by the solid-state reaction has more excellent thermophysical and mechanical properties, such as lower thermal conductivity (1.1–1.3W/(m·K), 1000℃ ), higher temperature gradient (300–500℃ ) and better fracture toughness. Besides, the rare earth tantalate is transmitted at a much lower rate than YSZ through O2– anions, which can effectively prevent the growth of thermal growth oxides (TGO). Considering the above advantages, the rare earth tantalate would be the great potential TBCs in the next generation of gas turbine.